INFO: task khugepaged:33 blocked for more than 158 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:khugepaged state:D stack:28128 pid: 33 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__flush_work+0x56c/0xb10 kernel/workqueue.c:3075
__lru_add_drain_all+0x421/0x770 mm/swap.c:841
khugepaged_do_scan mm/khugepaged.c:2235 [inline]
khugepaged+0x120/0x67b0 mm/khugepaged.c:2296
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task kworker/u4:11:3967 blocked for more than 158 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:11 state:D stack:26552 pid: 3967 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1215
fsnotify_mark_destroy_workfn+0xfd/0x3c0 fs/notify/mark.c:898
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: task kworker/u4:8:16677 blocked for more than 158 seconds.
Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:27072 pid:16677 ppid: 2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5178 [inline]
__schedule+0xa00/0x4c10 kernel/sched/core.c:6490
schedule+0xda/0x1b0 kernel/sched/core.c:6566
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
__synchronize_srcu+0x1f2/0x290 kernel/rcu/srcutree.c:1215
fsnotify_connector_destroy_workfn+0x49/0xa0 fs/notify/mark.c:208
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bd86870 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bd86570 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:507
1 lock held by khungtaskd/27:
#0: ffffffff8bd873c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6492
1 lock held by khugepaged/33:
#0: ffffffff8be7b0c8 (lock#5){+.+.}-{3:3}, at: __lru_add_drain_all+0x62/0x770 mm/swap.c:790
2 locks held by getty/3285:
#0: ffff88814a974098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002d162e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
3 locks held by syz-executor.0/3643:
#0: ffff888038ef2218 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: iterate_dir+0xcd/0x6f0 fs/readdir.c:55
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2515 [inline]
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: iterate_dir+0x459/0x6f0 fs/readdir.c:70
#2: ffff88807f46e990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14a0 fs/jbd2/transaction.c:461
3 locks held by syz-executor.5/3645:
#0: ffff888038ef3628 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: iterate_dir+0xcd/0x6f0 fs/readdir.c:55
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2515 [inline]
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: iterate_dir+0x459/0x6f0 fs/readdir.c:70
#2: ffff88807f46e990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14a0 fs/jbd2/transaction.c:461
1 lock held by syz-executor.1/3646:
3 locks held by syz-executor.4/3648:
#0: ffff888038ef0400 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: iterate_dir+0xcd/0x6f0 fs/readdir.c:55
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: file_accessed include/linux/fs.h:2515 [inline]
#1: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: iterate_dir+0x459/0x6f0 fs/readdir.c:70
#2: ffff88807f46e990 (jbd2_handle){++++}-{0:0}, at: start_this_handle+0xfb4/0x14a0 fs/jbd2/transaction.c:461
2 locks held by kworker/u4:11/3967:
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90005307da8 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
2 locks held by kworker/1:6/13585:
2 locks held by kworker/u4:8/16677:
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:636 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:663 [inline]
#0: ffff888011869138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x87a/0x1610 kernel/workqueue.c:2260
#1: ffffc90014487da8 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8ae/0x1610 kernel/workqueue.c:2264
3 locks held by kworker/0:8/22494:
2 locks held by dhcpcd/22662:
#0: ffff88807dda2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88807dda2130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
#1: ffffffff8bd92038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:292 [inline]
#1: ffffffff8bd92038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x562/0x670 kernel/rcu/tree_exp.h:940
1 lock held by dhcpcd/22690:
#0: ffff88807ab1c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88807ab1c130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
2 locks held by dhcpcd/22695:
#0: ffff888035852130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888035852130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
#1: ffffffff8bd92038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:324 [inline]
#1: ffffffff8bd92038 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x24a/0x670 kernel/rcu/tree_exp.h:940
1 lock held by dhcpcd/22696:
#0: ffff888034b52130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888034b52130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/22722:
#0: ffff88803c478130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff88803c478130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by dhcpcd/23417:
#0: ffff888035d84130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: lock_sock include/net/sock.h:1677 [inline]
#0: ffff888035d84130 (sk_lock-AF_PACKET){+.+.}-{0:0}, at: packet_do_bind+0x2f/0xdc0 net/packet/af_packet.c:3194
1 lock held by syz-executor.3/23553:
2 locks held by syz-executor.3/23559:
#0: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: __do_sys_sendfile64 fs/read_write.c:1319 [inline]
#0: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: __se_sys_sendfile64 fs/read_write.c:1305 [inline]
#0: ffff88807f46a460 (sb_writers#4){.+.+}-{0:0}, at: __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1305
#1: ffff888047a5ca38 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: inode_lock include/linux/fs.h:760 [inline]
#1: ffff888047a5ca38 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_dio_write_checks fs/ext4/file.c:454 [inline]
#1: ffff888047a5ca38 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_dio_write_iter fs/ext4/file.c:522 [inline]
#1: ffff888047a5ca38 (&sb->s_type->i_mutex_key#9){++++}-{3:3}, at: ext4_file_write_iter+0xa53/0x1520 fs/ext4/file.c:677
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 23553 Comm: syz-executor.3 Not tainted 5.19.0-syzkaller-02972-g200e340f2196 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:mark_usage kernel/locking/lockdep.c:4513 [inline]
RIP: 0010:__lock_acquire+0x7bb/0x5660 kernel/locking/lockdep.c:5007
Code: 6c 24 22 41 0f b6 5c 24 21 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 04 02 48 89 ea 83 e2 07 38 d0 7f 08 84 c0 <0f> 85 e4 3a 00 00 84 db 41 0f b6 44 24 22 78 60 a8 03 0f 84 b2 09
RSP: 0018:ffffc900152f7528 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000005 RCX: ffffffff815e3ca2
RDX: 0000000000000002 RSI: 0000000000000008 RDI: ffff888036fd0ac1
RBP: ffff888036fd0ac2 R08: 0000000000000000 R09: ffffffff9068e9ef
R10: fffffbfff20d1d3d R11: 0000000000000001 R12: ffff888036fd0aa0
R13: ffff888036fd0000 R14: ffff888036fd0a78 R15: dffffc0000000000
FS: 00007f646ecb6700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020356030 CR3: 000000006c9b5000 CR4: 0000000000350ee0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5666 [inline]
lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5631
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
__skb_try_recv_datagram+0x13a/0x4e0 net/core/datagram.c:262
__unix_dgram_recvmsg+0x190/0xb90 net/unix/af_unix.c:2390
unix_dgram_recvmsg+0xc0/0xe0 net/unix/af_unix.c:2487
sock_recvmsg_nosec net/socket.c:995 [inline]
____sys_recvmsg+0x536/0x600 net/socket.c:2702
___sys_recvmsg+0xf2/0x180 net/socket.c:2746
do_recvmmsg+0x25e/0x6e0 net/socket.c:2840
__sys_recvmmsg net/socket.c:2919 [inline]
__do_sys_recvmmsg net/socket.c:2942 [inline]
__se_sys_recvmmsg net/socket.c:2935 [inline]
__x64_sys_recvmmsg+0x20b/0x260 net/socket.c:2935
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f646da89209
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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:00007f646ecb6168 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: ffffffffffffffda RBX: 00007f646db9c030 RCX: 00007f646da89209
RDX: 0000000000010106 RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f646dae3161 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe2db7dd6f R14: 00007f646ecb6300 R15: 0000000000022000