INFO: task syz-executor.2:18689 blocked for more than 144 seconds.
Not tainted 6.3.0-rc3-next-20230321-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27936 pid:18689 ppid:5112 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: 0033:0x7f8ab888c0f9
RSP: 002b:00007f8ab95f1168 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: 000000000000000b RBX: 00007f8ab89abf80 RCX: 00007f8ab888c0f9
RDX: 0000000000000318 RSI: 00000000200bd000 RDI: 0000000000000004
RBP: 00007f8ab88e7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6ed59c5f R14: 00007f8ab95f1300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c7958f0 (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: ffffffff8c7955f0 (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: ffffffff8c796500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6545
1 lock held by udevd/4446:
2 locks held by getty/4762:
#0: ffff88802814a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x26/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xef4/0x13e0 drivers/tty/n_tty.c:2176
2 locks held by syz-executor.3/5127:
#0: ffff8880475be0e0 (&type->s_umount_key#88){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
#1: ffffffff8c7a1978 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#1: ffffffff8c7a1978 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992
2 locks held by kworker/1:0/10863:
#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:643 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012472538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffffc90014e9fdb0 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
4 locks held by kworker/u4:6/13367:
3 locks held by kworker/u4:3/14934:
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888016617938 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffffc900038efdb0 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
#2: ffffffff8c7a1840 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6a0 kernel/rcu/tree.c:3950
3 locks held by kworker/0:5/15006:
#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:643 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012470d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2376
#1: ffffc900038afdb0 (fqdir_free_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2380
#2: ffffffff8c7a1840 (rcu_state.barrier_mutex){+.+.}-{3:3}, at: rcu_barrier+0x48/0x6a0 kernel/rcu/tree.c:3950
1 lock held by syz-executor.2/18689:
#0: ffff888048abe868 (&ep->mtx){+.+.}-{3:3}, at: eventpoll_release_file+0xe2/0x1d0 fs/eventpoll.c:962
1 lock held by syz-executor.2/18699:
2 locks held by syz-executor.2/19758:
#0: ffff88802e960130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1697 [inline]
#0: ffff88802e960130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_setsockopt+0x155/0x39a0 net/packet/af_packet.c:3793
#1: ffffffff8c7a1978 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline]
#1: ffffffff8c7a1978 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992
1 lock held by syz-executor.0/19755:
#0: ffff888046baac20 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:771 [inline]
#0: ffff888046baac20 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_dio_read_iter fs/ext4/file.c:78 [inline]
#0: ffff888046baac20 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: ext4_file_read_iter+0x535/0x690 fs/ext4/file.c:145
1 lock held by syz-executor.4/19771:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc3-next-20230321-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: 5740 Comm: kworker/u4:10 Not tainted 6.3.0-rc3-next-20230321-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work
RIP: 0010:rq_of_rt_se kernel/sched/rt.c:299 [inline]
RIP: 0010:rt_rq_of_se kernel/sched/rt.c:304 [inline]
RIP: 0010:__dequeue_rt_entity kernel/sched/rt.c:1466 [inline]
RIP: 0010:dequeue_rt_stack+0x10e/0xcd0 kernel/sched/rt.c:1496
Code: 8e bf 0a 00 00 8b 83 10 09 00 00 41 83 e4 06 4c 89 eb 4c 89 6c 24 20 48 bd 00 00 00 00 00 fc ff df 44 89 64 24 10 89 44 24 14 <48> c7 c0 00 c5 03 00 48 89 04 24 eb 22 48 8d 7b 28 48 89 f8 48 c1
RSP: 0018:ffffc9000b347720 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88802ae73c00 RCX: ffff88802ae73a94
RDX: 1ffff110173079c2 RSI: 0000000000000009 RDI: ffff8880b983ce10
RBP: dffffc0000000000 R08: ffff88802ae73c00 R09: ffffffff8c686397
R10: fffffbfff18d0c72 R11: 0000000000000003 R12: 0000000000000000
R13: ffff88802ae73c00 R14: ffff88802ae73a94 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555556ae7708 CR3: 000000000c571000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
enqueue_rt_entity kernel/sched/rt.c:1508 [inline]
enqueue_task_rt+0x145/0xfc0 kernel/sched/rt.c:1545
enqueue_task+0xad/0x330 kernel/sched/core.c:2062
activate_task kernel/sched/core.c:2087 [inline]
ttwu_do_activate+0x15c/0x930 kernel/sched/core.c:3709
ttwu_queue kernel/sched/core.c:3953 [inline]
try_to_wake_up+0xbb6/0x1a50 kernel/sched/core.c:4275
wake_page_function+0x22a/0x480 mm/filemap.c:1117
__wake_up_common+0x147/0x650 kernel/sched/wait.c:107
folio_wake_bit+0x11e/0x270 mm/filemap.c:1150
folio_wake mm/filemap.c:1184 [inline]
folio_end_writeback+0x2a3/0x3b0 mm/filemap.c:1622
ext4_finish_bio+0x60c/0xc30 fs/ext4/page-io.c:145
ext4_release_io_end+0x118/0x3b0 fs/ext4/page-io.c:160
ext4_end_io_end fs/ext4/page-io.c:194 [inline]
ext4_do_flush_completed_IO fs/ext4/page-io.c:259 [inline]
ext4_end_io_rsv_work+0x156/0x670 fs/ext4/page-io.c:273
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2405
worker_thread+0x67d/0x10c0 kernel/workqueue.c:2552
kthread+0x33e/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308