INFO: task syz-executor.3:30416 blocked for more than 143 seconds.
Not tainted 6.3.0-rc2-next-20230317-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:28000 pid:30416 ppid:5135 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5305 [inline]
__schedule+0x1d23/0x5650 kernel/sched/core.c:6623
schedule+0xde/0x1a0 kernel/sched/core.c:6699
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6758
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa3b/0x1350 kernel/locking/mutex.c:747
eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
eventpoll_release include/linux/eventpoll.h:53 [inline]
__fput+0x7da/0xa90 fs/file_table.c:312
task_work_run+0x16f/0x270 kernel/task_work.c:179
get_signal+0x1c7/0x25b0 kernel/signal.c:2635
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff77708c0f9
RSP: 002b:00007ff777e13168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: 0000000000004e00 RBX: 00007ff7771abf80 RCX: 00007ff77708c0f9
RDX: 000000000000ff2e RSI: 00000000200000c0 RDI: 0000000000000004
RBP: 00007ff7770e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe29f1a40f R14: 00007ff777e13300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c795830 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c795530 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffffffff8c796400 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
2 locks held by getty/4764:
#0: ffff88802c002098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2177
2 locks held by syz-executor.5/5131:
#0: ffff8880792a00e0 (&type->s_umount_key#58){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
#1: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992
2 locks held by kworker/0:6/5193:
3 locks held by kworker/1:12/7523:
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361
#1: ffffc9000483fda8 ((work_completion)(&pwq->unbound_release_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365
#2: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#2: ffffffff8c7a1878 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992
2 locks held by kworker/u4:9/9508:
2 locks held by kworker/1:15/9848:
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:639 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:666 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x87a/0x15c0 kernel/workqueue.c:2361
#1: ffffc90005357da8 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8ae/0x15c0 kernel/workqueue.c:2365
3 locks held by kworker/u4:16/24589:
#0: ffff8880b983c518 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:539
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: mm_cid_get kernel/sched/sched.h:3280 [inline]
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: switch_mm_cid kernel/sched/sched.h:3302 [inline]
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: prepare_task_switch kernel/sched/core.c:5114 [inline]
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: context_switch kernel/sched/core.c:5256 [inline]
#1: ffff8880b9828808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: __schedule+0x2936/0x5650 kernel/sched/core.c:6623
#2: ffff88806ea80d40 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1119 [inline]
#2: ffff88806ea80d40 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_rx_queued_mgmt+0x10c/0x2d50 net/mac80211/ibss.c:1627
1 lock held by syz-executor.3/30416:
#0: ffff8880765e8868 (&ep->mtx){+.+.}-{3:3}, at: eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
1 lock held by syz-executor.3/30417:
1 lock held by syz-executor.4/31140:
#0: ffff888029b5e868 (&ep->mtx){+.+.}-{3:3}, at: eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
1 lock held by syz-executor.4/31144:
2 locks held by syz-executor.0/31478:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc2-next-20230317-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
nmi_cpu_backtrace+0x29c/0x350 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x2a4/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xe16/0x1090 kernel/hung_task.c:379
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 30417 Comm: syz-executor.3 Not tainted 6.3.0-rc2-next-20230317-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:write_comp_data+0x7/0x90 kernel/kcov.c:230
Code: 81 e2 00 01 ff 00 75 10 65 48 8b 04 25 00 bb 03 00 48 8b 80 58 15 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 65 8b 05 e1 0b 81 7e <49> 89 f1 89 c6 49 89 d2 81 e6 00 01 00 00 49 89 f8 65 48 8b 14 25
RSP: 0018:ffffc90016c4fb48 EFLAGS: 00000246
RAX: 0000000080000000 RBX: 0000000000000000 RCX: ffffffff81f8b066
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000005
RBP: ffff888029650780 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffffed100ecbd131
R13: ffff8880765e8800 R14: ffff888026e63180 R15: 0000000000000000
FS: 00007ff777df2700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe89b5a8000 CR3: 000000007576f000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__ep_remove+0x96/0xa50 fs/eventpoll.c:727
ep_remove_safe fs/eventpoll.c:782 [inline]
ep_clear_and_put+0x21c/0x3b0 fs/eventpoll.c:815
ep_eventpoll_release+0x45/0x60 fs/eventpoll.c:831
__fput+0x27c/0xa90 fs/file_table.c:321
task_work_run+0x16f/0x270 kernel/task_work.c:179
get_signal+0x1c7/0x25b0 kernel/signal.c:2635
arch_do_signal_or_restart+0x79/0x5c0 arch/x86/kernel/signal.c:306
exit_to_user_mode_loop kernel/entry/common.c:168 [inline]
exit_to_user_mode_prepare+0x11f/0x240 kernel/entry/common.c:204
__syscall_exit_to_user_mode_work kernel/entry/common.c:286 [inline]
syscall_exit_to_user_mode+0x1d/0x50 kernel/entry/common.c:297
do_syscall_64+0x46/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7ff77708c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff777df2168 EFLAGS: 00000246 ORIG_RAX: 00000000000000e9
RAX: 0000000000000000 RBX: 00007ff7771ac050 RCX: 00007ff77708c0f9
RDX: 0000000000000004 RSI: 0000000000000001 RDI: 0000000000000003
RBP: 00007ff7770e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020000140 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe29f1a40f R14: 00007ff777df2300 R15: 0000000000022000