Extracting prog: 4m50.250663162s
Minimizing prog: 36m59.847351466s
Simplifying prog options: 7m51.313780999s
Extracting C: 3m6.86105906s
Simplifying C: 0s


extracting reproducer from 1 programs
testing a last program of every proc
single: executing 1 programs separately with timeout 6m0s
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in switchdev_deferred_process_work
single: successfully extracted reproducer
found reproducer with 4 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX
detailed listing:
executing program 0:
socket$netlink(0x10, 0x3, 0x0)
r0 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(0xffffffffffffffff, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r0, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(0xffffffffffffffff, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, 0x0)
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, 0x0)

program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
program crashed: INFO: task hung in rtnetlink_rcv_msg
a never seen crash title: INFO: task hung in rtnetlink_rcv_msg, ignore
simplifying guilty program options
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in linkwatch_event
a never seen crash title: INFO: task hung in linkwatch_event, ignore
testing program (duration=6m0s, {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: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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in reg_process_self_managed_hints
a never seen crash title: INFO: task hung in reg_process_self_managed_hints, ignore
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in addrconf_dad_work
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in corrupted
validation run: crashed=true
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:6 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$netlink-socket$nl_route-ioctl$sock_SIOCGIFINDEX-ioctl$sock_SIOCBRDELBR
detailed listing:
executing program 0:
r0 = socket$netlink(0x10, 0x3, 0x0)
r1 = socket$nl_route(0x10, 0x3, 0x0)
ioctl$sock_SIOCGIFINDEX(r1, 0x8933, &(0x7f0000000000)={'veth1_to_bridge\x00'})
ioctl$sock_SIOCBRDELBR(r0, 0x89a2, &(0x7f0000000000)='bridge0\x00')

program crashed: INFO: task hung in inet6_rtm_newaddr
validation run: crashed=true
reproducing took 1h4m39.819029358s
repro crashed as (corrupted=false):
INFO: task syz-executor:5491 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21592 pid:5491  tgid:5491  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776
 rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 inet6_rtm_newaddr+0x5b7/0xd20 net/ipv6/addrconf.c:5027
 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+0x82f/0x9e0 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+0x3bd/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
RIP: 0033:0x7f224599165c
RSP: 002b:00007ffea19ba570 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2246714620 RCX: 00007f224599165c
RDX: 0000000000000040 RSI: 00007f2246714670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffea19ba5c4 R09: 000000000000000c

final repro crashed as (corrupted=false):
INFO: task syz-executor:5491 blocked for more than 143 seconds.
      Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor    state:D stack:21592 pid:5491  tgid:5491  ppid:1      task_flags:0x400140 flags:0x00080002
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5256 [inline]
 __schedule+0x14bc/0x5000 kernel/sched/core.c:6863
 __schedule_loop kernel/sched/core.c:6945 [inline]
 schedule+0x165/0x360 kernel/sched/core.c:6960
 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7017
 __mutex_lock_common kernel/locking/mutex.c:692 [inline]
 __mutex_lock+0x7e6/0x1350 kernel/locking/mutex.c:776
 rtnl_net_lock include/linux/rtnetlink.h:130 [inline]
 inet6_rtm_newaddr+0x5b7/0xd20 net/ipv6/addrconf.c:5027
 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+0x82f/0x9e0 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+0x3bd/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
RIP: 0033:0x7f224599165c
RSP: 002b:00007ffea19ba570 EFLAGS: 00000293 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 00007f2246714620 RCX: 00007f224599165c
RDX: 0000000000000040 RSI: 00007f2246714670 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007ffea19ba5c4 R09: 000000000000000c