Extracting prog: 21m5.031786889s
Minimizing prog: 41m57.263693425s
Simplifying prog options: 15m59.548319529s
Extracting C: 5m44.879360073s
Simplifying C: 0s


extracting reproducer from 56 programs
testing a last program of every proc
single: executing 16 programs separately with timeout 6m0s
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_SET_INTERFACE-sendmsg$NL80211_CMD_START_AP
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000080), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f00000000c0)={'wlan0\x00', <r2=>0x0})
sendmsg$NL80211_CMD_SET_INTERFACE(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000340)={&(0x7f0000000180)={0x24, r1, 0x5, 0x0, 0x0, {{}, {@val={0x8, 0x3, r2}, @void}}, [@NL80211_ATTR_IFTYPE={0x8, 0x5, 0x9}]}, 0x24}}, 0x0)
sendmsg$NL80211_CMD_START_AP(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000540)={0x88, r1, 0x5, 0x70bd26, 0x0, {{}, {@val={0x8, 0x3, r2}, @void}}, [@beacon=[@NL80211_ATTR_BEACON_HEAD={0x4c, 0xe, {{{}, {}, @broadcast, @device_a, @from_mac}, 0x0, @default, 0x1, @void, @void, @void, @void, @void, @void, @void, @void, @void, @val={0x2d, 0x1a, {0x1, 0x1, 0x7, 0x0, {0xa600000000000000, 0x2, 0x0, 0x3fe, 0x0, 0x0, 0x0, 0x1}, 0x0, 0x9, 0x3}}, @val={0x72, 0x6}, @void, @void}}], @chandef_params=[@NL80211_ATTR_WIPHY_FREQ={0x8}, @NL80211_ATTR_WIPHY_EDMG_CHANNELS={0x5, 0x118, 0x32}], @NL80211_ATTR_BEACON_INTERVAL={0x8}, @NL80211_ATTR_DTIM_PERIOD={0x8}]}, 0x88}}, 0x20000014)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_generic-syz_genetlink_get_family_id$nl80211-ioctl$sock_SIOCGIFINDEX_80211-sendmsg$NL80211_CMD_SET_INTERFACE-sendmsg$NL80211_CMD_START_AP
detailed listing:
executing program 0:
r0 = socket$nl_generic(0x10, 0x3, 0x10)
r1 = syz_genetlink_get_family_id$nl80211(&(0x7f0000000080), 0xffffffffffffffff)
ioctl$sock_SIOCGIFINDEX_80211(r0, 0x8933, &(0x7f00000000c0)={'wlan0\x00', <r2=>0x0})
sendmsg$NL80211_CMD_SET_INTERFACE(r0, &(0x7f0000000100)={0x0, 0x0, &(0x7f0000000340)={&(0x7f0000000180)={0x24, r1, 0x5, 0x0, 0x0, {{}, {@val={0x8, 0x3, r2}, @void}}, [@NL80211_ATTR_IFTYPE={0x8, 0x5, 0x9}]}, 0x24}}, 0x0)
sendmsg$NL80211_CMD_START_AP(r0, &(0x7f00000001c0)={0x0, 0x0, &(0x7f0000000200)={&(0x7f0000000540)={0x88, r1, 0x5, 0x70bd26, 0x0, {{}, {@val={0x8, 0x3, r2}, @void}}, [@beacon=[@NL80211_ATTR_BEACON_HEAD={0x4c, 0xe, {{{}, {}, @broadcast, @device_a, @from_mac}, 0x0, @default, 0x1, @void, @void, @void, @void, @void, @void, @void, @void, @void, @val={0x2d, 0x1a, {0x1, 0x1, 0x7, 0x0, {0xa600000000000000, 0x2, 0x0, 0x3fe, 0x0, 0x0, 0x0, 0x1}, 0x0, 0x9, 0x3}}, @val={0x72, 0x6}, @void, @void}}], @chandef_params=[@NL80211_ATTR_WIPHY_FREQ={0x8}, @NL80211_ATTR_WIPHY_EDMG_CHANNELS={0x5, 0x118, 0x32}], @NL80211_ATTR_BEACON_INTERVAL={0x8}, @NL80211_ATTR_DTIM_PERIOD={0x8}]}, 0x88}}, 0x20000014)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID
detailed listing:
executing program 0:
socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(0xffffffffffffffff, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, 0x0, 0xc802)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, 0x0, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={0x0}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
simplifying guilty program options
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
extracting C reproducer
testing compiled C program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing program (duration=6m0s, {Threaded:false 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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
validation run: crashed=true
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program crashed: lost connection to test machine
suppressed program crash: lost connection to test machine
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program did not crash
validation run: crashed=false
testing program (duration=6m0s, {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:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): socket$nl_rdma-arch_prctl$ARCH_GET_CPUID-arch_prctl$ARCH_GET_CPUID-sendmsg$RDMA_NLDEV_CMD_NEWLINK
detailed listing:
executing program 0:
r0 = socket$nl_rdma(0x10, 0x3, 0x14)
arch_prctl$ARCH_GET_CPUID(0x1011)
arch_prctl$ARCH_GET_CPUID(0x1011)
sendmsg$RDMA_NLDEV_CMD_NEWLINK(r0, &(0x7f0000000340)={0x0, 0x0, &(0x7f0000000080)={&(0x7f00000000c0)={0x38, 0x1403, 0x1, 0x0, 0x25dfdbfb, "", [{{0x9, 0x2, 'syz1\x00'}, {0x8, 0x41, 'rxe\x00'}, {0x14, 0x33, 'ipvlan0\x00'}}]}, 0x38}, 0x1, 0x0, 0x0, 0x4040074}, 0xc802)

program crashed: KASAN: slab-use-after-free Read in __ethtool_get_link_ksettings
validation run: crashed=true
reproducing took 2h20m2.275652587s
repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
Read of size 8 at addr ffff888039dc82e8 by task kworker/0:2/924

CPU: 0 UID: 0 PID: 924 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
 ib_get_eth_speed+0x15e/0x7b0 drivers/infiniband/core/verbs.c:1999
 rxe_query_port+0x93/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
 __ib_query_port drivers/infiniband/core/device.c:2148 [inline]
 ib_query_port+0x170/0x830 drivers/infiniband/core/device.c:2180
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x16f/0x940 net/smc/smc_ib.c:388
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Allocated by task 5916:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __do_kmalloc_node mm/slub.c:5657 [inline]
 __kvmalloc_node_noprof+0x408/0x940 mm/slub.c:7134
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11997
 rtnl_create_link+0x31f/0xcf0 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x16e7/0x1c90 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3c7/0x520 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 3475:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6668 [inline]
 kfree+0x1bd/0x900 mm/slub.c:6876
 device_release+0x9e/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x570 lib/kobject.c:737
 netdev_run_todo+0xd2c/0xea0 net/core/dev.c:11698
 default_device_exit_batch+0x969/0x9e0 net/core/dev.c:13037
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x525/0x990 net/core/net_namespace.c:252
 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

The buggy address belongs to the object at ffff888039dc8000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 744 bytes inside of
 freed 4096-byte region [ffff888039dc8000, ffff888039dc9000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x39dc8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888031656a41
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813ff30500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff888031656a41
head: 0080000000000040 ffff88813ff30500 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000000f5000000 ffff888031656a41
head: 0080000000000003 ffffea0000e77201 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5916, tgid 5916 (syz-executor), ts 109483724675, free_ts 105328114847
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846
 prep_new_page mm/page_alloc.c:1854 [inline]
 get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab+0x86/0x3b0 mm/slub.c:3248
 new_slab mm/slub.c:3302 [inline]
 ___slab_alloc+0xb10/0x1400 mm/slub.c:4656
 __slab_alloc+0xc6/0x1f0 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 __do_kmalloc_node mm/slub.c:5656 [inline]
 __kvmalloc_node_noprof+0x327/0x940 mm/slub.c:7134
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11997
 rtnl_create_link+0x31f/0xcf0 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x16e7/0x1c90 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
page last free pid 176 tgid 176 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xfe1/0x1170 mm/page_alloc.c:2943
 discard_slab mm/slub.c:3346 [inline]
 __put_partials+0x149/0x170 mm/slub.c:3886
 __slab_free+0x139/0x210 mm/slub.c:5952
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x23c/0x6f0 mm/slub.c:5315
 __alloc_skb+0x255/0x430 net/core/skbuff.c:679
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_netconf_notify_devconf+0x10f/0x1d0 net/ipv6/addrconf.c:593
 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7357 [inline]
 addrconf_sysctl_unregister net/ipv6/addrconf.c:7381 [inline]
 addrconf_ifdown+0x156f/0x18a0 net/ipv6/addrconf.c:4006
 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
 call_netdevice_notifiers net/core/dev.c:2282 [inline]
 unregister_netdevice_many_notify+0x1867/0x2330 net/core/dev.c:12381
 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248
 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340

Memory state around the buggy address:
 ffff888039dc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039dc8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888039dc8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff888039dc8300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039dc8380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
==================================================================
BUG: KASAN: slab-use-after-free in __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
Read of size 8 at addr ffff888039dc82e8 by task kworker/0:2/924

CPU: 0 UID: 0 PID: 924 Comm: kworker/0:2 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Workqueue: events smc_ib_port_event_work
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xca/0x240 mm/kasan/report.c:482
 kasan_report+0x118/0x150 mm/kasan/report.c:595
 __ethtool_get_link_ksettings+0x5e/0x170 net/ethtool/ioctl.c:443
 ib_get_eth_speed+0x15e/0x7b0 drivers/infiniband/core/verbs.c:1999
 rxe_query_port+0x93/0x3d0 drivers/infiniband/sw/rxe/rxe_verbs.c:62
 __ib_query_port drivers/infiniband/core/device.c:2148 [inline]
 ib_query_port+0x170/0x830 drivers/infiniband/core/device.c:2180
 smc_ib_remember_port_attr net/smc/smc_ib.c:364 [inline]
 smc_ib_port_event_work+0x16f/0x940 net/smc/smc_ib.c:388
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
 </TASK>

Allocated by task 5916:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 poison_kmalloc_redzone mm/kasan/common.c:397 [inline]
 __kasan_kmalloc+0x93/0xb0 mm/kasan/common.c:414
 kasan_kmalloc include/linux/kasan.h:262 [inline]
 __do_kmalloc_node mm/slub.c:5657 [inline]
 __kvmalloc_node_noprof+0x408/0x940 mm/slub.c:7134
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11997
 rtnl_create_link+0x31f/0xcf0 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x16e7/0x1c90 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
 sock_sendmsg_nosec net/socket.c:727 [inline]
 __sock_sendmsg+0x21c/0x270 net/socket.c:742
 __sys_sendto+0x3c7/0x520 net/socket.c:2206
 __do_sys_sendto net/socket.c:2213 [inline]
 __se_sys_sendto net/socket.c:2209 [inline]
 __x64_sys_sendto+0xde/0x100 net/socket.c:2209
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 3475:
 kasan_save_stack mm/kasan/common.c:56 [inline]
 kasan_save_track+0x3e/0x80 mm/kasan/common.c:77
 kasan_save_free_info+0x46/0x50 mm/kasan/generic.c:584
 poison_slab_object mm/kasan/common.c:252 [inline]
 __kasan_slab_free+0x5c/0x80 mm/kasan/common.c:284
 kasan_slab_free include/linux/kasan.h:234 [inline]
 slab_free_hook mm/slub.c:2540 [inline]
 slab_free mm/slub.c:6668 [inline]
 kfree+0x1bd/0x900 mm/slub.c:6876
 device_release+0x9e/0x1d0 drivers/base/core.c:-1
 kobject_cleanup lib/kobject.c:689 [inline]
 kobject_release lib/kobject.c:720 [inline]
 kref_put include/linux/kref.h:65 [inline]
 kobject_put+0x228/0x570 lib/kobject.c:737
 netdev_run_todo+0xd2c/0xea0 net/core/dev.c:11698
 default_device_exit_batch+0x969/0x9e0 net/core/dev.c:13037
 ops_exit_list net/core/net_namespace.c:205 [inline]
 ops_undo_list+0x525/0x990 net/core/net_namespace.c:252
 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340
 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3421
 kthread+0x711/0x8a0 kernel/kthread.c:463
 ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246

The buggy address belongs to the object at ffff888039dc8000
 which belongs to the cache kmalloc-cg-4k of size 4096
The buggy address is located 744 bytes inside of
 freed 4096-byte region [ffff888039dc8000, ffff888039dc9000)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x39dc8
head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888031656a41
flags: 0x80000000000040(head|node=0|zone=1)
page_type: f5(slab)
raw: 0080000000000040 ffff88813ff30500 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000040004 00000000f5000000 ffff888031656a41
head: 0080000000000040 ffff88813ff30500 dead000000000122 0000000000000000
head: 0000000000000000 0000000000040004 00000000f5000000 ffff888031656a41
head: 0080000000000003 ffffea0000e77201 00000000ffffffff 00000000ffffffff
head: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000008
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd60c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_RETRY_MAYFAIL|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 5916, tgid 5916 (syz-executor), ts 109483724675, free_ts 105328114847
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x234/0x290 mm/page_alloc.c:1846
 prep_new_page mm/page_alloc.c:1854 [inline]
 get_page_from_freelist+0x28c0/0x2960 mm/page_alloc.c:3915
 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5210
 alloc_pages_mpol+0xd1/0x380 mm/mempolicy.c:2486
 alloc_slab_page mm/slub.c:3075 [inline]
 allocate_slab+0x86/0x3b0 mm/slub.c:3248
 new_slab mm/slub.c:3302 [inline]
 ___slab_alloc+0xb10/0x1400 mm/slub.c:4656
 __slab_alloc+0xc6/0x1f0 mm/slub.c:4779
 __slab_alloc_node mm/slub.c:4855 [inline]
 slab_alloc_node mm/slub.c:5251 [inline]
 __do_kmalloc_node mm/slub.c:5656 [inline]
 __kvmalloc_node_noprof+0x327/0x940 mm/slub.c:7134
 alloc_netdev_mqs+0xa6/0x11b0 net/core/dev.c:11997
 rtnl_create_link+0x31f/0xcf0 net/core/rtnetlink.c:3648
 rtnl_newlink_create+0x25c/0xb00 net/core/rtnetlink.c:3830
 __rtnl_newlink net/core/rtnetlink.c:3957 [inline]
 rtnl_newlink+0x16e7/0x1c90 net/core/rtnetlink.c:4072
 rtnetlink_rcv_msg+0x7cf/0xb70 net/core/rtnetlink.c:6958
 netlink_rcv_skb+0x208/0x470 net/netlink/af_netlink.c:2550
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x846/0xa10 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x805/0xb30 net/netlink/af_netlink.c:1894
page last free pid 176 tgid 176 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0xfe1/0x1170 mm/page_alloc.c:2943
 discard_slab mm/slub.c:3346 [inline]
 __put_partials+0x149/0x170 mm/slub.c:3886
 __slab_free+0x139/0x210 mm/slub.c:5952
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:349
 kasan_slab_alloc include/linux/kasan.h:252 [inline]
 slab_post_alloc_hook mm/slub.c:4953 [inline]
 slab_alloc_node mm/slub.c:5263 [inline]
 kmem_cache_alloc_node_noprof+0x23c/0x6f0 mm/slub.c:5315
 __alloc_skb+0x255/0x430 net/core/skbuff.c:679
 alloc_skb include/linux/skbuff.h:1383 [inline]
 nlmsg_new include/net/netlink.h:1055 [inline]
 inet6_netconf_notify_devconf+0x10f/0x1d0 net/ipv6/addrconf.c:593
 __addrconf_sysctl_unregister net/ipv6/addrconf.c:7357 [inline]
 addrconf_sysctl_unregister net/ipv6/addrconf.c:7381 [inline]
 addrconf_ifdown+0x156f/0x18a0 net/ipv6/addrconf.c:4006
 addrconf_notify+0x1bc/0x1050 net/ipv6/addrconf.c:-1
 notifier_call_chain+0x19d/0x3a0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2268 [inline]
 call_netdevice_notifiers net/core/dev.c:2282 [inline]
 unregister_netdevice_many_notify+0x1867/0x2330 net/core/dev.c:12381
 ops_exit_rtnl_list net/core/net_namespace.c:187 [inline]
 ops_undo_list+0x3dc/0x990 net/core/net_namespace.c:248
 cleanup_net+0x4de/0x7b0 net/core/net_namespace.c:696
 process_one_work kernel/workqueue.c:3257 [inline]
 process_scheduled_works+0xad1/0x1770 kernel/workqueue.c:3340

Memory state around the buggy address:
 ffff888039dc8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039dc8200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888039dc8280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                          ^
 ffff888039dc8300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888039dc8380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================