Extracting prog: 2m44.194841334s
Minimizing prog: 45m47.450227114s
Simplifying prog options: 5m2.401990888s
Extracting C: 1m42.945037947s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program crashed: KASAN: use-after-free Write in __ip6_del_rt
program did not crash
single: failed to extract reproducer
single: executing 1 programs separately with timeout 1m40s
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program crashed: KASAN: use-after-free Write in __ip6_del_rt
single: successfully extracted reproducer
found reproducer with 10 syscalls
minimizing guilty program
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
socket$nl_route(0x10, 0x3, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
socket$nl_route(0x10, 0x3, 0x0)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-socket$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-sendmsg$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-openat$incfs-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
openat$incfs(0xffffffffffffff9c, 0x0, 0x1a10c1, 0x9c37611dc13d0d83)
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program crashed: KASAN: use-after-free Write in __ip6_del_rt
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000) (async)
sendmsg$nl_route(0xffffffffffffffff, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r0, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, &(0x7f0000000140)={0x0, 0x0, &(0x7f0000000100)={&(0x7f0000000080)={0x28, 0x4, 0x6, 0x5, 0x0, 0x0, {0x5, 0x0, 0x3}, [@IPSET_ATTR_SETNAME={0x9, 0x2, 'syz0\x00'}, @IPSET_ATTR_PROTOCOL={0x5}]}, 0x28}, 0x1, 0x0, 0x0, 0x24000000}, 0x4000)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program crashed: KASAN: use-after-free Write in __ip6_del_rt
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, 0x0, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, 0x0}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={0x0}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, 0x0, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={0x0}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, 0x0, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, 0x0}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={0x0, 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, 0x0, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, 0x0}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={0x0}}, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
program did not crash
simplifying guilty program options
testing program (duration=1m40s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program did not crash
testing program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$IPSET_CMD_FLUSH(0xffffffffffffffff, 0x0, 0x4000) (async)
sendmsg$nl_route(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000140)=@ipv6_newnexthop={0x1c, 0x68, 0x5fb9a818fb7378e9, 0x0, 0x0, {}, [@NHA_BLACKHOLE={0x4}]}, 0x1c}}, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r1, &(0x7f0000000000)={0x0, 0x0, &(0x7f00000001c0)={&(0x7f0000000300)=@newnexthop={0x24, 0x68, 0x1, 0x2, 0x7ffffffc, {}, [@NHA_GROUP={0xc, 0x2, [{0x1, 0x4}]}]}, 0x24}, 0x1, 0x0, 0x0, 0x24008000}, 0x4000)
r2 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r2, &(0x7f0000000180)={0x0, 0x0, &(0x7f0000000780)={&(0x7f0000000380)=ANY=[@ANYBLOB="300000001800dd8d00000000000000000a000000000000060000000008001e0002"], 0x30}}, 0x4090) (async)
r3 = socket$nl_route(0x10, 0x3, 0x0)
sendmsg$nl_route(r3, &(0x7f0000000100)={0x0, 0x0, &(0x7f00000000c0)={&(0x7f0000000000)=@ipv6_newnexthop={0x24, 0x68, 0x309, 0x0, 0x0, {}, [@NHA_FDB={0x4}, @NHA_ID={0x8, 0x1, 0x1}]}, 0x24}}, 0x0)

program crashed: KASAN: use-after-free Write in __ip6_del_rt
extracting C reproducer
testing compiled C program (duration=1m40s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_route-sendmsg$IPSET_CMD_FLUSH-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route-socket$nl_route-sendmsg$nl_route
program did not crash
reproducing took 55m17.780378913s
repro crashed as (corrupted=false):
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device veth1_macvtap left promiscuous mode
device veth0_vlan left promiscuous mode
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:705 [inline]
BUG: KASAN: use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock include/linux/spinlock.h:183 [inline]
BUG: KASAN: use-after-free in __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x81/0xe0 kernel/locking/spinlock.c:175
Write of size 4 at addr ffff8881083ef514 by task kworker/u4:4/354

CPU: 0 PID: 354 Comm: kworker/u4:4 Not tainted 5.10.237-syzkaller-00010-gcf6ed0f1511d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:705 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
 do_raw_spin_lock include/linux/spinlock.h:183 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x81/0xe0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 __ip6_del_rt+0x8f/0x150 net/ipv6/route.c:3791
 ip6_del_rt+0xb0/0xf0 net/ipv6/route.c:3807
 __remove_nexthop_fib+0x1e8/0x260 net/ipv4/nexthop.c:885
 __remove_nexthop net/ipv4/nexthop.c:893 [inline]
 remove_nexthop+0x75/0x4d0 net/ipv4/nexthop.c:919
 remove_nh_grp_entry net/ipv4/nexthop.c:797 [inline]
 remove_nexthop_from_groups+0x193/0xe40 net/ipv4/nexthop.c:846
 __remove_nexthop net/ipv4/nexthop.c:904 [inline]
 remove_nexthop+0x38a/0x4d0 net/ipv4/nexthop.c:919
 flush_all_nexthops net/ipv4/nexthop.c:1237 [inline]
 nexthop_net_exit+0x3a/0xa0 net/ipv4/nexthop.c:2012
 ops_exit_list net/core/net_namespace.c:185 [inline]
 cleanup_net+0x586/0xb70 net/core/net_namespace.c:609
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 11220:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 kmem_cache_alloc_trace+0x184/0x2e0 mm/slub.c:2974
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 fib6_net_init+0x217/0x880 net/ipv6/ip6_fib.c:2376
 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144
 setup_net+0x36d/0xb50 net/core/net_namespace.c:345
 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486
 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x120/0x170 kernel/nsproxy.c:231
 ksys_unshare+0x4ac/0x7d0 kernel/fork.c:3080
 __do_sys_unshare kernel/fork.c:3148 [inline]
 __se_sys_unshare kernel/fork.c:3146 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3146
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 354:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc0/0x270 mm/slub.c:4191
 fib6_free_table net/ipv6/ip6_fib.c:214 [inline]
 fib6_net_exit+0x270/0x300 net/ipv6/ip6_fib.c:2430
 ops_exit_list net/core/net_namespace.c:185 [inline]
 cleanup_net+0x586/0xb70 net/core/net_namespace.c:609
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2976 [inline]
 call_rcu+0x105/0x1040 kernel/rcu/tree.c:3050
 tnode_free net/ipv4/fib_trie.c:495 [inline]
 replace+0x1a1/0x450 net/ipv4/fib_trie.c:521
 inflate net/ipv4/fib_trie.c:623 [inline]
 resize+0x10ec/0x2450 net/ipv4/fib_trie.c:868
 trie_rebalance net/ipv4/fib_trie.c:1059 [inline]
 fib_insert_node net/ipv4/fib_trie.c:1103 [inline]
 fib_insert_alias+0x98f/0x1020 net/ipv4/fib_trie.c:1117
 fib_table_insert+0x794/0x1d40 net/ipv4/fib_trie.c:1328
 fib_magic net/ipv4/fib_frontend.c:1093 [inline]
 fib_add_ifaddr+0x31b/0xed0 net/ipv4/fib_frontend.c:1115
 fib_inetaddr_event+0x15d/0x310 net/ipv4/fib_frontend.c:1431
 notifier_call_chain kernel/notifier.c:83 [inline]
 blocking_notifier_call_chain+0xba/0x140 kernel/notifier.c:337
 __inet_insert_ifa+0x87e/0xa70 net/ipv4/devinet.c:568
 inet_rtm_newaddr+0xc34/0x1510 net/ipv4/devinet.c:968
 rtnetlink_rcv_msg+0x9db/0xb90 net/core/rtnetlink.c:5610
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2485
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5628
 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
 netlink_unicast+0x87c/0xa40 net/netlink/af_netlink.c:1333
 netlink_sendmsg+0x88d/0xb30 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x41d/0x580 net/socket.c:2006
 __do_sys_sendto net/socket.c:2018 [inline]
 __se_sys_sendto net/socket.c:2014 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2014
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881083ef500
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 20 bytes inside of
 128-byte region [ffff8881083ef500, ffff8881083ef580)
The buggy address belongs to the page:
page:ffffea000420fbc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1083ef
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea000417f780 0000000200000002 ffff888100043500
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1131211787, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5349
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc_trace+0x1b3/0x2e0 mm/slub.c:2972
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 call_usermodehelper_setup+0x71/0x1d0 kernel/umh.c:363
 kobject_uevent_env+0x639/0x700 lib/kobject_uevent.c:629
 kobject_uevent+0x1d/0x30 lib/kobject_uevent.c:657
 kernel_add_sysfs_param+0x103/0x128 kernel/params.c:816
 param_sysfs_builtin+0x164/0x1d9 kernel/params.c:851
 param_sysfs_init+0x6a/0x6f kernel/params.c:972
 do_one_initcall+0x187/0x510 init/main.c:1197
 do_initcall_level+0x16f/0x2cf init/main.c:1270
 do_initcalls+0x50/0x92 init/main.c:1286
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881083ef400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881083ef480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881083ef500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881083ef580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881083ef600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================

final repro crashed as (corrupted=false):
device bridge_slave_0 left promiscuous mode
bridge0: port 1(bridge_slave_0) entered disabled state
device veth1_macvtap left promiscuous mode
device veth0_vlan left promiscuous mode
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: use-after-free in atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:705 [inline]
BUG: KASAN: use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock include/linux/spinlock.h:183 [inline]
BUG: KASAN: use-after-free in __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
BUG: KASAN: use-after-free in _raw_spin_lock_bh+0x81/0xe0 kernel/locking/spinlock.c:175
Write of size 4 at addr ffff8881083ef514 by task kworker/u4:4/354

CPU: 0 PID: 354 Comm: kworker/u4:4 Not tainted 5.10.237-syzkaller-00010-gcf6ed0f1511d #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Workqueue: netns cleanup_net
Call Trace:
 __dump_stack+0x21/0x24 lib/dump_stack.c:77
 dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
 print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:435 [inline]
 kasan_report+0xe2/0x130 mm/kasan/report.c:452
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_try_cmpxchg_acquire include/asm-generic/atomic-instrumented.h:705 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:82 [inline]
 do_raw_spin_lock include/linux/spinlock.h:183 [inline]
 __raw_spin_lock_bh include/linux/spinlock_api_smp.h:136 [inline]
 _raw_spin_lock_bh+0x81/0xe0 kernel/locking/spinlock.c:175
 spin_lock_bh include/linux/spinlock.h:359 [inline]
 __ip6_del_rt+0x8f/0x150 net/ipv6/route.c:3791
 ip6_del_rt+0xb0/0xf0 net/ipv6/route.c:3807
 __remove_nexthop_fib+0x1e8/0x260 net/ipv4/nexthop.c:885
 __remove_nexthop net/ipv4/nexthop.c:893 [inline]
 remove_nexthop+0x75/0x4d0 net/ipv4/nexthop.c:919
 remove_nh_grp_entry net/ipv4/nexthop.c:797 [inline]
 remove_nexthop_from_groups+0x193/0xe40 net/ipv4/nexthop.c:846
 __remove_nexthop net/ipv4/nexthop.c:904 [inline]
 remove_nexthop+0x38a/0x4d0 net/ipv4/nexthop.c:919
 flush_all_nexthops net/ipv4/nexthop.c:1237 [inline]
 nexthop_net_exit+0x3a/0xa0 net/ipv4/nexthop.c:2012
 ops_exit_list net/core/net_namespace.c:185 [inline]
 cleanup_net+0x586/0xb70 net/core/net_namespace.c:609
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Allocated by task 11220:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:45 [inline]
 set_alloc_info mm/kasan/common.c:430 [inline]
 ____kasan_kmalloc mm/kasan/common.c:509 [inline]
 __kasan_kmalloc+0xda/0x110 mm/kasan/common.c:518
 kasan_kmalloc include/linux/kasan.h:254 [inline]
 kmem_cache_alloc_trace+0x184/0x2e0 mm/slub.c:2974
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 fib6_net_init+0x217/0x880 net/ipv6/ip6_fib.c:2376
 ops_init+0x1ba/0x4a0 net/core/net_namespace.c:144
 setup_net+0x36d/0xb50 net/core/net_namespace.c:345
 copy_net_ns+0x314/0x520 net/core/net_namespace.c:486
 create_new_namespaces+0x3a2/0x650 kernel/nsproxy.c:110
 unshare_nsproxy_namespaces+0x120/0x170 kernel/nsproxy.c:231
 ksys_unshare+0x4ac/0x7d0 kernel/fork.c:3080
 __do_sys_unshare kernel/fork.c:3148 [inline]
 __se_sys_unshare kernel/fork.c:3146 [inline]
 __x64_sys_unshare+0x38/0x40 kernel/fork.c:3146
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

Freed by task 354:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
 kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
 ____kasan_slab_free+0x125/0x160 mm/kasan/common.c:362
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:370
 kasan_slab_free include/linux/kasan.h:220 [inline]
 slab_free_hook mm/slub.c:1595 [inline]
 slab_free_freelist_hook+0xc5/0x190 mm/slub.c:1621
 slab_free mm/slub.c:3203 [inline]
 kfree+0xc0/0x270 mm/slub.c:4191
 fib6_free_table net/ipv6/ip6_fib.c:214 [inline]
 fib6_net_exit+0x270/0x300 net/ipv6/ip6_fib.c:2430
 ops_exit_list net/core/net_namespace.c:185 [inline]
 cleanup_net+0x586/0xb70 net/core/net_namespace.c:609
 process_one_work+0x6e1/0xba0 kernel/workqueue.c:2301
 worker_thread+0xa6a/0x13b0 kernel/workqueue.c:2447
 kthread+0x346/0x3d0 kernel/kthread.c:313
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298

Last potentially related work creation:
 kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
 __kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
 __call_rcu kernel/rcu/tree.c:2976 [inline]
 call_rcu+0x105/0x1040 kernel/rcu/tree.c:3050
 tnode_free net/ipv4/fib_trie.c:495 [inline]
 replace+0x1a1/0x450 net/ipv4/fib_trie.c:521
 inflate net/ipv4/fib_trie.c:623 [inline]
 resize+0x10ec/0x2450 net/ipv4/fib_trie.c:868
 trie_rebalance net/ipv4/fib_trie.c:1059 [inline]
 fib_insert_node net/ipv4/fib_trie.c:1103 [inline]
 fib_insert_alias+0x98f/0x1020 net/ipv4/fib_trie.c:1117
 fib_table_insert+0x794/0x1d40 net/ipv4/fib_trie.c:1328
 fib_magic net/ipv4/fib_frontend.c:1093 [inline]
 fib_add_ifaddr+0x31b/0xed0 net/ipv4/fib_frontend.c:1115
 fib_inetaddr_event+0x15d/0x310 net/ipv4/fib_frontend.c:1431
 notifier_call_chain kernel/notifier.c:83 [inline]
 blocking_notifier_call_chain+0xba/0x140 kernel/notifier.c:337
 __inet_insert_ifa+0x87e/0xa70 net/ipv4/devinet.c:568
 inet_rtm_newaddr+0xc34/0x1510 net/ipv4/devinet.c:968
 rtnetlink_rcv_msg+0x9db/0xb90 net/core/rtnetlink.c:5610
 netlink_rcv_skb+0x1e0/0x430 net/netlink/af_netlink.c:2485
 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:5628
 netlink_unicast_kernel net/netlink/af_netlink.c:1307 [inline]
 netlink_unicast+0x87c/0xa40 net/netlink/af_netlink.c:1333
 netlink_sendmsg+0x88d/0xb30 net/netlink/af_netlink.c:1901
 sock_sendmsg_nosec net/socket.c:652 [inline]
 __sock_sendmsg net/socket.c:664 [inline]
 __sys_sendto+0x41d/0x580 net/socket.c:2006
 __do_sys_sendto net/socket.c:2018 [inline]
 __se_sys_sendto net/socket.c:2014 [inline]
 __x64_sys_sendto+0xe5/0x100 net/socket.c:2014
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb

The buggy address belongs to the object at ffff8881083ef500
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 20 bytes inside of
 128-byte region [ffff8881083ef500, ffff8881083ef580)
The buggy address belongs to the page:
page:ffffea000420fbc0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1083ef
flags: 0x4000000000000200(slab)
raw: 4000000000000200 ffffea000417f780 0000000200000002 ffff888100043500
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 1131211787, free_ts 0
 set_page_owner include/linux/page_owner.h:35 [inline]
 post_alloc_hook mm/page_alloc.c:2456 [inline]
 prep_new_page+0x179/0x180 mm/page_alloc.c:2462
 get_page_from_freelist+0x2235/0x23d0 mm/page_alloc.c:4254
 __alloc_pages_nodemask+0x268/0x5f0 mm/page_alloc.c:5349
 alloc_slab_page mm/slub.c:-1 [inline]
 allocate_slab mm/slub.c:1808 [inline]
 new_slab+0x84/0x3f0 mm/slub.c:1869
 new_slab_objects mm/slub.c:2627 [inline]
 ___slab_alloc+0x2a6/0x450 mm/slub.c:2791
 __slab_alloc+0x63/0xa0 mm/slub.c:2831
 slab_alloc_node mm/slub.c:2913 [inline]
 slab_alloc mm/slub.c:2955 [inline]
 kmem_cache_alloc_trace+0x1b3/0x2e0 mm/slub.c:2972
 kmalloc include/linux/slab.h:552 [inline]
 kzalloc include/linux/slab.h:664 [inline]
 call_usermodehelper_setup+0x71/0x1d0 kernel/umh.c:363
 kobject_uevent_env+0x639/0x700 lib/kobject_uevent.c:629
 kobject_uevent+0x1d/0x30 lib/kobject_uevent.c:657
 kernel_add_sysfs_param+0x103/0x128 kernel/params.c:816
 param_sysfs_builtin+0x164/0x1d9 kernel/params.c:851
 param_sysfs_init+0x6a/0x6f kernel/params.c:972
 do_one_initcall+0x187/0x510 init/main.c:1197
 do_initcall_level+0x16f/0x2cf init/main.c:1270
 do_initcalls+0x50/0x92 init/main.c:1286
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8881083ef400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff8881083ef480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff8881083ef500: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                         ^
 ffff8881083ef580: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff8881083ef600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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