Extracting prog: 5m39.828048105s Minimizing prog: 36m47.087978585s Simplifying prog options: 9m36.153033377s Extracting C: 3m31.438511761s 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: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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: INFO: task hung in reg_process_self_managed_hints single: successfully extracted reproducer found reproducer with 2 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}}): socketpair$unix detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)) 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}}): ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: ioctl$sock_SIOCETHTOOL(0xffffffffffffffff, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, 0x0) ioctl$sock_SIOCETHTOOL(0xffffffffffffffff, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, 0x0) 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', 0x0}) 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs}) 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL program crashed: INFO: task hung in switchdev_deferred_process_work a never seen crash title: INFO: task hung in switchdev_deferred_process_work, 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: INFO: task hung in addrconf_dad_work a never seen crash title: INFO: task hung in addrconf_dad_work, 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: no output from test machine a never seen crash title: no output from test machine, ignore 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: INFO: task hung in addrconf_dad_work validation run: crashed=true 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: INFO: task hung in addrconf_dad_work validation run: crashed=true 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}}): socketpair$unix-ioctl$sock_SIOCETHTOOL detailed listing: executing program 0: socketpair$unix(0x1, 0x5, 0x0, &(0x7f0000000140)={0xffffffffffffffff, 0xffffffffffffffff}) ioctl$sock_SIOCETHTOOL(r0, 0x89f6, &(0x7f0000000080)={'bridge0\x00', &(0x7f00000000c0)=@ethtool_regs={0x4, 0x0, 0x1b, "2a161d2d71db37f20a8f1597f02515fcead4e1f5cad54790dbdb1a"}}) program crashed: INFO: task hung in netdev_work_proc validation run: crashed=true reproducing took 1h6m56.327222928s repro crashed as (corrupted=false): INFO: task kworker/0:3:1229 blocked for more than 155 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:22656 pid:1229 tgid:1229 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: events netdev_work_proc Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821 netdev_lock_ops_compat include/net/netdev_lock.h:94 [inline] netdev_work_proc+0x209/0x780 net/core/netdev_work.c:146 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz-executor:5789 blocked for more than 155 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21888 pid:5789 tgid:5789 ppid:5783 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821 rtnl_net_lock include/linux/rtnetlink.h:134 [inline] inet6_rtm_newaddr+0x667/0xe00 net/ipv6/addrconf.c:5068 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x408/0x5a0 net/socket.c:2280 final repro crashed as (corrupted=false): INFO: task kworker/0:3:1229 blocked for more than 155 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/0:3 state:D stack:22656 pid:1229 tgid:1229 ppid:2 task_flags:0x4208060 flags:0x00080000 Workqueue: events netdev_work_proc Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821 netdev_lock_ops_compat include/net/netdev_lock.h:94 [inline] netdev_work_proc+0x209/0x780 net/core/netdev_work.c:146 process_one_work kernel/workqueue.c:3396 [inline] process_scheduled_works+0xc3d/0x1630 kernel/workqueue.c:3479 worker_thread+0xa47/0xfb0 kernel/workqueue.c:3560 kthread+0x38b/0x480 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 INFO: task syz-executor:5789 blocked for more than 155 seconds. Not tainted syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor state:D stack:21888 pid:5789 tgid:5789 ppid:5783 task_flags:0x400140 flags:0x00080000 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 __schedule_loop kernel/sched/core.c:7361 [inline] schedule+0x164/0x2b0 kernel/sched/core.c:7376 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:7433 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x7c1/0x1550 kernel/locking/mutex.c:821 rtnl_net_lock include/linux/rtnetlink.h:134 [inline] inet6_rtm_newaddr+0x667/0xe00 net/ipv6/addrconf.c:5068 rtnetlink_rcv_msg+0x802/0xc00 net/core/rtnetlink.c:7159 netlink_rcv_skb+0x226/0x4a0 net/netlink/af_netlink.c:2572 netlink_unicast_kernel net/netlink/af_netlink.c:1335 [inline] netlink_unicast+0x7bd/0x940 net/netlink/af_netlink.c:1361 netlink_sendmsg+0x813/0xb40 net/netlink/af_netlink.c:1916 sock_sendmsg_nosec+0x13a/0x180 net/socket.c:800 __sock_sendmsg net/socket.c:815 [inline] __sys_sendto+0x408/0x5a0 net/socket.c:2280