INFO: task syz.2.19:5315 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.2.19 state:D stack:27824 pid: 5315 ppid: 4976 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blk_ioctl_zeroout block/ioctl.c:183 [inline]
blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f2955a99539
RSP: 002b:00007f29550fd028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f2955d04fa0 RCX: 00007f2955a99539
RDX: 0000200000000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007f2955b2cee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2955d05038 R14: 00007f2955d04fa0 R15: 00007ffdf3a31438
INFO: task syz.3.20:5317 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:27760 pid: 5317 ppid: 4972 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blk_ioctl_zeroout block/ioctl.c:183 [inline]
blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f95e24ea539
RSP: 002b:00007f95e1b4e028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f95e2755fa0 RCX: 00007f95e24ea539
RDX: 0000200000000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007f95e257dee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f95e2756038 R14: 00007f95e2755fa0 R15: 00007fffb2c1ad98
INFO: task syz.4.21:5320 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:27824 pid: 5320 ppid: 4978 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5049 [inline]
__schedule+0x11ef/0x43c0 kernel/sched/core.c:6395
schedule+0x11b/0x1e0 kernel/sched/core.c:6478
rwsem_down_write_slowpath+0xc87/0x1260 kernel/locking/rwsem.c:1165
filemap_invalidate_lock include/linux/fs.h:832 [inline]
blk_ioctl_zeroout block/ioctl.c:183 [inline]
blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
blkdev_ioctl+0x291/0x700 block/ioctl.c:598
block_ioctl+0xac/0xf0 block/fops.c:496
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:874 [inline]
__se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f33d8b25539
RSP: 002b:00007f33d8189028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f33d8d90fa0 RCX: 00007f33d8b25539
RDX: 0000200000000040 RSI: 000000000000127f RDI: 0000000000000003
RBP: 00007f33d8bb8ee0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f33d8d91038 R14: 00007f33d8d90fa0 R15: 00007ffeb90c80b8
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c31f360 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
3 locks held by kworker/u4:2/154:
4 locks held by kworker/u4:4/1279:
#0: ffff888016c79138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc90004e67d00 ((linkwatch_work).work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8d43e4c8 (rtnl_mutex){+.+.}-{3:3}, at: linkwatch_event+0xa/0x50 net/core/link_watch.c:251
#3: ffff8880b913a358 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x26/0x140 kernel/sched/core.c:475
2 locks held by getty/3951:
#0: ffff88814d555098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002cf62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5df/0x1a70 drivers/tty/n_tty.c:2158
2 locks held by kworker/0:15/4305:
#0: ffff888016c72138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc90003fcfd00 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
3 locks held by kworker/1:5/4325:
#0: ffff888016c70938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000348fd00 (deferred_process_work){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8d43e4c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
3 locks held by kworker/1:7/4328:
#0: ffff88814ce15d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x761/0x1010 kernel/workqueue.c:-1
#1: ffffc9000120fd00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x79f/0x1010 kernel/workqueue.c:2285
#2: ffffffff8d43e4c8 (rtnl_mutex){+.+.}-{3:3}, at: switchdev_deferred_process_work+0xa/0x20 net/switchdev/switchdev.c:74
1 lock held by syz.1.18/5291:
1 lock held by syz.2.19/5315:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.3.20/5317:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.4.21/5320:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.6.23/5764:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.5.22/5767:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.7.24/5800:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.8.25/5802:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.9.26/5804:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.1.28/5848:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.0.27/5866:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.3.30/5887:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.2.29/5889:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.4.31/5891:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.5.32/5924:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.6.33/5937:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.7.34/5986:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.9.36/6008:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.8.35/6016:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.1.37/6027:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.0.38/6029:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.3.39/6057:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.2.40/6091:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.4.41/6097:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.5.42/6136:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.6.43/6140:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.7.44/6168:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.9.45/6191:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
1 lock held by syz.8.46/6199:
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blk_ioctl_zeroout block/ioctl.c:183 [inline]
#0: ffff888140830980 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_common_ioctl+0x1a1b/0x1f00 block/ioctl.c:487
6 locks held by syz-executor/6201:
#0: ffff88807f5ce460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x295/0xd60 fs/read_write.c:590
#1: ffff88802469fc88 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write_iter+0x1e5/0x4c0 fs/kernfs/file.c:287
#2: ffff8881488cf3a8 (kn->active#360){.+.+}-{0:0}, at: kernfs_fop_write_iter+0x208/0x4c0 fs/kernfs/file.c:288
#3: ffffffff8cd7afc8 (nsim_bus_dev_list_lock){+.+.}-{3:3}, at: del_device_store+0xd3/0x3a0 drivers/net/netdevsim/bus.c:344
#4: ffff888055025178 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:809 [inline]
#4: ffff888055025178 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1064 [inline]
#4: ffff888055025178 (&dev->mutex){....}-{3:3}, at: device_release_driver_internal+0xb0/0x750 drivers/base/dd.c:1279
#5: ffffffff8c323de8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline]
#5: ffffffff8c323de8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2d1/0x750 kernel/rcu/tree_exp.h:845
2 locks held by syz-executor/6212:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Call Trace:
dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106
nmi_cpu_backtrace+0x3a2/0x3d0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x163/0x280 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xe0f/0xe50 kernel/hung_task.c:369
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 144 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:__this_cpu_preempt_check+0x0/0x10 lib/smp_processor_id.c:65
Code: 48 89 da e8 a2 46 f5 ff 48 8b 74 24 30 48 c7 c7 40 0a 7a 8a e8 91 46 f5 ff e8 bc 07 f8 ff eb a8 e8 d5 ee ff ff 0f 1f 44 00 00 <48> 89 fe 48 c7 c7 c0 09 7a 8a e9 e1 fe ff ff 00 eb 1e 0f 1f 00 48
RSP: 0018:ffffc900016dfc00 EFLAGS: 00000046
RAX: ffffffffffffffff RBX: ffff8880189fbb80 RCX: e553a63210ad6c00
RDX: dffffc0000000000 RSI: ffffffff8a2b4420 RDI: ffffffff8a2b3180
RBP: ffffc900016dfdb8 R08: ffff888016c79803 R09: 1ffff11002d8f300
R10: dffffc0000000000 R11: ffffed1002d8f301 R12: dffffc0000000000
R13: ffff888059610578 R14: ffffffff89c6e9cf R15: ffff888016cc8008
FS: 0000000000000000(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fff35424db0 CR3: 000000005d665000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_hardirqs_on+0x94/0x140 kernel/locking/lockdep.c:4340
__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline]
_raw_spin_unlock_irq+0x1f/0x40 kernel/locking/spinlock.c:202
process_one_work+0x759/0x1010 kernel/workqueue.c:2283
worker_thread+0xaa6/0x1290 kernel/workqueue.c:2457
kthread+0x436/0x520 kernel/kthread.c:334
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:287