Extracting prog: 3m15.705790479s Minimizing prog: 13m8.313627842s Simplifying prog options: 5m51.447796323s Extracting C: 3m0.461836364s 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}}): socket$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program crashed: unregister_netdevice: waiting for DEV to become free single: successfully extracted reproducer found reproducer with 2 syscalls minimizing guilty program testing program (duration=4m20.424186712s, {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$inet detailed listing: executing program 0: socket$inet(0x2, 0x2, 0x0) program did not crash testing program (duration=4m20.424186712s, {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$sock_ifreq detailed listing: executing program 0: ioctl$sock_ifreq(0xffffffffffffffff, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program did not crash testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq program crashed: BUG: workqueue lockup in nsim_fib_event_work a never seen crash title: BUG: workqueue lockup in nsim_fib_event_work, ignore simplifying guilty program options testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program crashed: BUG: workqueue lockup in netdev_work_proc a never seen crash title: BUG: workqueue lockup in netdev_work_proc, ignore testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program did not crash testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program crashed: BUG: workqueue lockup in wg_packet_encrypt_worker validation run: crashed=true testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program crashed: INFO: task hung in del_device_store validation run: crashed=true testing program (duration=4m20.424186712s, {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$inet-ioctl$sock_ifreq detailed listing: executing program 0: r0 = socket$inet(0x2, 0x2, 0x0) ioctl$sock_ifreq(r0, 0x89a2, &(0x7f0000000100)={'bridge0\x00', @ifru_addrs=@can}) program crashed: INFO: task hung in del_device_store validation run: crashed=true reproducing took 33m8.11783527s repro crashed as (corrupted=false): INFO: task syz-executor:4905 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:0 pid:4905 tgid:4905 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4913 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:0 pid:4913 tgid:4913 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4919 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:0 pid:4919 tgid:4919 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 device_lock include/linux/device.h:1109 [inline] device_del+0xa4/0x71c drivers/base/core.c:3929 device_unregister+0x2c/0xf0 drivers/base/core.c:4008 nsim_bus_dev_del+0x60/0x8c drivers/net/netdevsim/bus.c:488 del_device_store+0x24c/0x2d4 drivers/net/netdevsim/bus.c:243 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4924 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:0 pid:4924 tgid:4924 ppid:4921 task_flags:0x400140 flags:0x00800000 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Showing all locks held in the system: locks held by kworker/0:0/9: 1, last CPU#0: #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_one_work kernel/workqueue.c:3460 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_scheduled_works+0x698/0x1250 kernel/workqueue.c:3578 locks held by kworker/0:1/10: 3, last CPU#0: #0: ffff0000c002ad48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c002ad48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff80008fa27c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff80008fa27c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000d48c4258 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x198/0x320 drivers/net/netdevsim/fib.c:1490 locks held by kworker/u8:0/12: 7, last CPU#1: #0: ffff0000c004e148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004e148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff80008fa47c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff80008fa47c20 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff80008abc21c8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x104/0x6c4 net/core/net_namespace.c:679 #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1109 [inline] #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline] #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x104/0x390 net/devlink/core.c:581 #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:314 [inline] #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline] #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x118/0x390 net/devlink/core.c:581 #5: ffff0000cf4fcfb0 (&sb->s_type->i_mutex_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1071 [inline] #5: ffff0000cf4fcfb0 (&sb->s_type->i_mutex_key#3/1){+.+.}-{4:4}, at: __start_dirop+0xa0/0xf4 fs/namei.c:2924 #6: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #6: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by khungtaskd/31: 1, last CPU#1: #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6871 locks held by kworker/u8:3/41: 6, last CPU#1: #0: ffff0000c3ca5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c3ca5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800090fa7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800090fa7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff80008abcf560 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000cf8c2530 (&idev->mc_lock){+.+.}-{4:4}, at: ipv6_mc_dad_complete+0x34/0x170 net/ipv6/mcast.c:2313 #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: mld_newpack+0x234/0x7b4 net/ipv6/mcast.c:1818 #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: ipv6_get_lladdr+0x4c/0x3c0 net/ipv6/addrconf.c:1959 locks held by kworker/u8:4/62: 2, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800092157c20 ((work_completion)(&port->bc_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800092157c20 ((work_completion)(&port->bc_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 locks held by kworker/u8:8/449: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff8000940c7c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff8000940c7c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000ecb50800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6990 [inline] #2: ffff0000ecb50800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xd0/0x464 net/wireless/core.c:596 locks held by kworker/u8:9/586: 5, last CPU#0: #0: ffff0000cea74148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000cea74148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff8000947b7c20 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff8000947b7c20 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x4ec/0x14e0 net/core/dev.c:6896 #3: ffff80008ac285b8 (nl_table_lock){...-}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline] #3: ffff80008ac285b8 (nl_table_lock){...-}-{3:3}, at: br_multicast_add_group+0x60/0xc4 net/bridge/br_multicast.c:1593 #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: NF_HOOK+0xbc/0x394 include/linux/netfilter.h:326 locks held by kworker/0:3/1529: 4, last CPU#0: #0: ffff0000c3a6a948 ((wq_completion)mld){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c3a6a948 ((wq_completion)mld){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800097737c20 ((work_completion)(&(&idev->mc_dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800097737c20 ((work_completion)(&(&idev->mc_dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000cff83530 (&idev->mc_lock){+.+.}-{4:4}, at: mld_dad_work+0x38/0x1d8 net/ipv6/mcast.c:2330 #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: mld_sendpack+0x1ac/0xd34 net/ipv6/mcast.c:1862 locks held by udevd/4348: 2, last CPU#1: #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:320 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x190/0x394 security/tomoyo/file.c:772 #1: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #1: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by getty/4496: 2, on CPU#0: #0: ffff0000d109a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000932db2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x350/0xffc drivers/tty/n_tty.c:2211 locks held by syz-executor/4749: 1, last CPU#1: #0: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #0: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by kworker/0:4/4831: 2, last CPU#0: #0: ffff0000edec5148 ((wq_completion)wg-crypt-wg0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000edec5148 ((wq_completion)wg-crypt-wg0#2){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800096c47c20 ((work_completion)(&peer->transmit_packet_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800096c47c20 ((work_completion)(&peer->transmit_packet_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 locks held by syz-executor/4905: 4, on CPU#0: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ec7eec80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by syz-executor/4913: 4, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000d138ec80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by syz-executor/4919: 5, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ee32f080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 #4: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1109 [inline] #4: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_del+0xa4/0x71c drivers/base/core.c:3929 locks held by syz-executor/4924: 4, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ec811880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by kworker/u8:12/5042: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800097177c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800097177c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000ed430800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6990 [inline] #2: ffff0000ed430800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xd0/0x464 net/wireless/core.c:596 locks held by kworker/u8:14/5046: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800098f07c20 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800098f07c20 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000d48c5258 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:320 locks held by syz-executor/5047: 3, last CPU#1: #0: ffff0000d0aee180 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline] #0: ffff0000d0aee180 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x138/0x1a04 mm/mmap.c:1716 #1: ffff0000d0aecc80 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:540 [inline] #1: ffff0000d0aecc80 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x208/0x1a04 mm/mmap.c:1723 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by udevd/5048: 3, last CPU#1: #0: ffff0000d218a478 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:531 #1: ffff0000d235ddf0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1071 [inline] #1: ffff0000d235ddf0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_dirop+0xa0/0xf4 fs/namei.c:2924 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by syz-executor/5049: 3, last CPU#1: #0: ffff0000d062c910 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x3c/0x624 drivers/bluetooth/hci_vhci.c:492 #1: ffff80008994a560 (wq_pool_mutex){+.+.}-{4:4}, at: __alloc_workqueue+0xa84/0x121c kernel/workqueue.c:6201 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by dhcpcd-run-hook/5053: 4, last CPU#1: #0: ffff0000da825700 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline] #0: ffff0000da825700 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1b0/0x4a4 mm/util.c:579 #1: ffff0000d0b66478 (sb_writers#3){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2283 [inline] #1: ffff0000d0b66478 (sb_writers#3){.+.+}-{0:0}, at: ext4_file_mmap_prepare+0x1dc/0x398 fs/ext4/file.c:919 #2: ffff0000d0b64950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x19b0/0x1bc0 fs/jbd2/transaction.c:-1 #3: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #3: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 ============================================= final repro crashed as (corrupted=false): INFO: task syz-executor:4905 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:0 pid:4905 tgid:4905 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4913 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:0 pid:4913 tgid:4913 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4919 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:0 pid:4919 tgid:4919 ppid:1 task_flags:0x400140 flags:0x00800001 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 device_lock include/linux/device.h:1109 [inline] device_del+0xa4/0x71c drivers/base/core.c:3929 device_unregister+0x2c/0xf0 drivers/base/core.c:4008 nsim_bus_dev_del+0x60/0x8c drivers/net/netdevsim/bus.c:488 del_device_store+0x24c/0x2d4 drivers/net/netdevsim/bus.c:243 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 INFO: task syz-executor:4924 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:0 pid:4924 tgid:4924 ppid:4921 task_flags:0x400140 flags:0x00800000 Call trace: __switch_to+0x2b4/0x6e4 arch/arm64/kernel/process.c:792 (T) context_switch kernel/sched/core.c:5583 [inline] __schedule+0x1368/0x2b50 kernel/sched/core.c:7382 __schedule_loop kernel/sched/core.c:7459 [inline] schedule+0x13c/0x20c kernel/sched/core.c:7474 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:7531 __mutex_lock_common kernel/locking/mutex.c:726 [inline] __mutex_lock+0x5d8/0x10b8 kernel/locking/mutex.c:821 mutex_lock_nested+0x24/0x30 kernel/locking/mutex.c:874 del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 bus_attr_store+0x80/0xa4 drivers/base/bus.c:172 sysfs_kf_write+0xe0/0x108 fs/sysfs/file.c:145 kernfs_fop_write_iter+0x260/0x3b8 fs/kernfs/file.c:345 new_sync_write fs/read_write.c:595 [inline] vfs_write+0x51c/0xa0c fs/read_write.c:687 ksys_write+0x12c/0x228 fs/read_write.c:739 __do_sys_write fs/read_write.c:750 [inline] __se_sys_write fs/read_write.c:747 [inline] __arm64_sys_write+0x84/0x98 fs/read_write.c:747 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x244 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xec/0x23c arch/arm64/kernel/syscall.c:121 do_el0_svc+0x4c/0x5c arch/arm64/kernel/syscall.c:140 el0_svc+0x60/0x1d8 arch/arm64/kernel/entry-common.c:796 el0t_64_sync_handler+0x44/0x104 arch/arm64/kernel/entry-common.c:815 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:606 Showing all locks held in the system: locks held by kworker/0:0/9: 1, last CPU#0: #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_one_work kernel/workqueue.c:3460 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_scheduled_works+0x698/0x1250 kernel/workqueue.c:3578 locks held by kworker/0:1/10: 3, last CPU#0: #0: ffff0000c002ad48 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c002ad48 ((wq_completion)events){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff80008fa27c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff80008fa27c20 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000d48c4258 (&data->fib_lock){+.+.}-{4:4}, at: nsim_fib_event_work+0x198/0x320 drivers/net/netdevsim/fib.c:1490 locks held by kworker/u8:0/12: 7, last CPU#1: #0: ffff0000c004e148 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004e148 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff80008fa47c20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff80008fa47c20 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff80008abc21c8 (pernet_ops_rwsem){++++}-{4:4}, at: cleanup_net+0x104/0x6c4 net/core/net_namespace.c:679 #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1109 [inline] #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:124 [inline] #3: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: devlink_pernet_pre_exit+0x104/0x390 net/devlink/core.c:581 #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_lock net/devlink/core.c:314 [inline] #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devl_dev_lock net/devlink/devl_internal.h:125 [inline] #4: ffff0000c9fd4258 (&devlink->lock_key){+.+.}-{4:4}, at: devlink_pernet_pre_exit+0x118/0x390 net/devlink/core.c:581 #5: ffff0000cf4fcfb0 (&sb->s_type->i_mutex_key#3/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1071 [inline] #5: ffff0000cf4fcfb0 (&sb->s_type->i_mutex_key#3/1){+.+.}-{4:4}, at: __start_dirop+0xa0/0xf4 fs/namei.c:2924 #6: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #6: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by khungtaskd/31: 1, last CPU#1: #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x4c/0x188 kernel/locking/lockdep.c:6871 locks held by kworker/u8:3/41: 6, last CPU#1: #0: ffff0000c3ca5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c3ca5948 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800090fa7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800090fa7c20 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff80008abcf560 (rtnl_mutex){+.+.}-{4:4}, at: rtnl_lock+0x20/0x2c net/core/rtnetlink.c:80 #3: ffff0000cf8c2530 (&idev->mc_lock){+.+.}-{4:4}, at: ipv6_mc_dad_complete+0x34/0x170 net/ipv6/mcast.c:2313 #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: mld_newpack+0x234/0x7b4 net/ipv6/mcast.c:1818 #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #5: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: ipv6_get_lladdr+0x4c/0x3c0 net/ipv6/addrconf.c:1959 locks held by kworker/u8:4/62: 2, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800092157c20 ((work_completion)(&port->bc_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800092157c20 ((work_completion)(&port->bc_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 locks held by kworker/u8:8/449: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff8000940c7c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff8000940c7c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000ecb50800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6990 [inline] #2: ffff0000ecb50800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xd0/0x464 net/wireless/core.c:596 locks held by kworker/u8:9/586: 5, last CPU#0: #0: ffff0000cea74148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000cea74148 ((wq_completion)bat_events){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff8000947b7c20 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff8000947b7c20 ((work_completion)(&(&bat_priv->tt.work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #2: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: process_backlog+0x4ec/0x14e0 net/core/dev.c:6896 #3: ffff80008ac285b8 (nl_table_lock){...-}-{3:3}, at: spin_lock include/linux/spinlock.h:347 [inline] #3: ffff80008ac285b8 (nl_table_lock){...-}-{3:3}, at: br_multicast_add_group+0x60/0xc4 net/bridge/br_multicast.c:1593 #4: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: NF_HOOK+0xbc/0x394 include/linux/netfilter.h:326 locks held by kworker/0:3/1529: 4, last CPU#0: #0: ffff0000c3a6a948 ((wq_completion)mld){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c3a6a948 ((wq_completion)mld){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800097737c20 ((work_completion)(&(&idev->mc_dad_work)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800097737c20 ((work_completion)(&(&idev->mc_dad_work)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000cff83530 (&idev->mc_lock){+.+.}-{4:4}, at: mld_dad_work+0x38/0x1d8 net/ipv6/mcast.c:2330 #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:309 [inline] #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #3: ffff800089aa5660 (rcu_read_lock){....}-{1:3}, at: mld_sendpack+0x1ac/0xd34 net/ipv6/mcast.c:1862 locks held by udevd/4348: 2, last CPU#1: #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:320 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_read_lock security/tomoyo/common.h:1112 [inline] #0: ffff800089dffcf8 (tomoyo_ss){.+.+}-{0:0}, at: tomoyo_check_open_permission+0x190/0x394 security/tomoyo/file.c:772 #1: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #1: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by getty/4496: 2, on CPU#0: #0: ffff0000d109a0a0 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340 #1: ffff8000932db2e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x350/0xffc drivers/tty/n_tty.c:2211 locks held by syz-executor/4749: 1, last CPU#1: #0: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #0: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by kworker/0:4/4831: 2, last CPU#0: #0: ffff0000edec5148 ((wq_completion)wg-crypt-wg0#2){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000edec5148 ((wq_completion)wg-crypt-wg0#2){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800096c47c20 ((work_completion)(&peer->transmit_packet_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800096c47c20 ((work_completion)(&peer->transmit_packet_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 locks held by syz-executor/4905: 4, on CPU#0: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ec7eec80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by syz-executor/4913: 4, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000d138ec80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by syz-executor/4919: 5, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ee32f080 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 #4: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_lock include/linux/device.h:1109 [inline] #4: ffff0000c9fd5128 (&dev->mutex){....}-{4:4}, at: device_del+0xa4/0x71c drivers/base/core.c:3929 locks held by syz-executor/4924: 4, on CPU#1: #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2762 [inline] #0: ffff0000cfd6e478 (sb_writers#6){.+.+}-{0:0}, at: vfs_write+0x248/0xa0c fs/read_write.c:683 #1: ffff0000ec811880 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1b0/0x3b8 fs/kernfs/file.c:336 #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_get_active_of fs/kernfs/file.c:73 [inline] #2: ffff0000cac2e2d8 (kn->active#55){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x1f0/0x3b8 fs/kernfs/file.c:337 #3: ffff80008a3ad420 (nsim_bus_dev_list_lock){+.+.}-{4:4}, at: del_device_store+0xd8/0x2d4 drivers/net/netdevsim/bus.c:233 locks held by kworker/u8:12/5042: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800097177c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800097177c20 ((work_completion)(&rdev->wiphy_work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000ed430800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: class_wiphy_constructor include/net/cfg80211.h:6990 [inline] #2: ffff0000ed430800 (&rdev->wiphy.mtx){+.+.}-{4:4}, at: cfg80211_wiphy_work+0xd0/0x464 net/wireless/core.c:596 locks held by kworker/u8:14/5046: 3, last CPU#1: #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #0: ffff0000c004c148 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x8c8/0x1250 kernel/workqueue.c:3578 #1: ffff800098f07c20 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3470 [inline] #1: ffff800098f07c20 ((work_completion)(&(&nsim_dev->trap_data->trap_report_dw)->work)){+.+.}-{0:0}, at: process_scheduled_works+0x8d0/0x1250 kernel/workqueue.c:3578 #2: ffff0000d48c5258 (&devlink->lock_key#2){+.+.}-{4:4}, at: devl_trylock+0x24/0x34 net/devlink/core.c:320 locks held by syz-executor/5047: 3, last CPU#1: #0: ffff0000d0aee180 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline] #0: ffff0000d0aee180 (&mm->mmap_lock){++++}-{4:4}, at: dup_mmap+0x138/0x1a04 mm/mmap.c:1716 #1: ffff0000d0aecc80 (&mm->mmap_lock/1){+.+.}-{4:4}, at: mmap_write_lock_nested include/linux/mmap_lock.h:540 [inline] #1: ffff0000d0aecc80 (&mm->mmap_lock/1){+.+.}-{4:4}, at: dup_mmap+0x208/0x1a04 mm/mmap.c:1723 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by udevd/5048: 3, last CPU#1: #0: ffff0000d218a478 (sb_writers#5){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:531 #1: ffff0000d235ddf0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1071 [inline] #1: ffff0000d235ddf0 (&type->i_mutex_dir_key#5/1){+.+.}-{4:4}, at: __start_dirop+0xa0/0xf4 fs/namei.c:2924 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by syz-executor/5049: 3, last CPU#1: #0: ffff0000d062c910 (&data->open_mutex){+.+.}-{4:4}, at: vhci_create_device+0x3c/0x624 drivers/bluetooth/hci_vhci.c:492 #1: ffff80008994a560 (wq_pool_mutex){+.+.}-{4:4}, at: __alloc_workqueue+0xa84/0x121c kernel/workqueue.c:6201 #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #2: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 locks held by dhcpcd-run-hook/5053: 4, last CPU#1: #0: ffff0000da825700 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:550 [inline] #0: ffff0000da825700 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1b0/0x4a4 mm/util.c:579 #1: ffff0000d0b66478 (sb_writers#3){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2283 [inline] #1: ffff0000d0b66478 (sb_writers#3){.+.+}-{0:0}, at: ext4_file_mmap_prepare+0x1dc/0x398 fs/ext4/file.c:919 #2: ffff0000d0b64950 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0x19b0/0x1bc0 fs/jbd2/transaction.c:-1 #3: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:213 [inline] #3: ffff800089bcd0b0 (remove_cache_srcu){.+.+}-{0:0}, at: srcu_read_lock+0x48/0x64 include/linux/srcu.h:320 =============================================