INFO: task kworker/u4:8:2835 blocked for more than 148 seconds.
Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:8 state:D stack:21936 pid:2835 tgid:2835 ppid:2 flags:0x00004000
Workqueue: netns cleanup_net
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x17df/0x4a40 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6804 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6819
schedule_timeout+0xb0/0x310 kernel/time/timer.c:2159
do_wait_for_common kernel/sched/completion.c:95 [inline]
__wait_for_common kernel/sched/completion.c:116 [inline]
wait_for_common kernel/sched/completion.c:127 [inline]
wait_for_completion+0x355/0x620 kernel/sched/completion.c:148
__flush_workqueue+0x730/0x1630 kernel/workqueue.c:3617
drain_workqueue+0xc9/0x390 kernel/workqueue.c:3730
destroy_workqueue+0xba/0xc40 kernel/workqueue.c:5319
bond_destructor+0x4d/0x80 drivers/net/bonding/bond_main.c:5846
netdev_run_todo+0xd4f/0xf40 net/core/dev.c:10581
default_device_exit_batch+0x975/0x9f0 net/core/dev.c:11625
ops_exit_list net/core/net_namespace.c:175 [inline]
cleanup_net+0x775/0xb90 net/core/net_namespace.c:618
process_one_work kernel/workqueue.c:3049 [inline]
process_scheduled_works+0x913/0x14f0 kernel/workqueue.c:3125
worker_thread+0xa60/0x1000 kernel/workqueue.c:3206
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8e130d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
3 locks held by kworker/u4:8/2835:
#0: ffff888015acd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3024 [inline]
#0: ffff888015acd948 ((wq_completion)netns){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x14f0 kernel/workqueue.c:3125
#1: ffffc9000abffd20 (net_cleanup_work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:3024 [inline]
#1: ffffc9000abffd20 (net_cleanup_work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x14f0 kernel/workqueue.c:3125
#2: ffffffff8f36da50 (pernet_ops_rwsem){++++}-{3:3}, at: cleanup_net+0xf5/0xb90 net/core/net_namespace.c:580
2 locks held by udevd/4519:
2 locks held by getty/4828:
#0: ffff88802288d0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900031432f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
1 lock held by udevd/5821:
#0: ffff88801d14d9c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
#0: ffff88801d14d9c0 (mapping.invalidate_lock#2){.+.+}-{3:3}, at: page_cache_ra_unbounded+0xf2/0x7c0 mm/readahead.c:225
2 locks held by syz-executor.1/10126:
#0: ffffffff8dfeca48 (sched_core_mutex){+.+.}-{3:3}, at: sched_core_get+0x56/0x180 kernel/sched/core.c:420
#1: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#1: ffffffff8e1360f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfb0/0xff0 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5821 Comm: udevd Not tainted 6.8.0-rc2-next-20240202-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024
RIP: 0010:filter_irq_stacks+0x2e/0xa0 kernel/stacktrace.c:396
Code: 55 41 57 41 56 41 55 41 54 53 85 f6 74 72 49 89 fe 41 89 f4 45 31 ff 48 c7 c5 e0 01 80 8b 49 c7 c5 c0 bf 77 8b 48 89 fb eb 0c <49> ff c7 48 83 c3 08 4d 39 fc 74 4f 48 89 d8 48 c1 e8 03 48 b9 00
RSP: 0018:ffffc9001361f868 EFLAGS: 00000202
RAX: ffffffff8b8000e6 RBX: ffffc9001361f948 RCX: ffffffff8b77c913
RDX: 0000000000000000 RSI: 000000000000000a RDI: ffffc9001361f900
RBP: ffffffff8b8001e0 R08: ffffffff813713c2 R09: 1ffffffff1f0b6e5
R10: dffffc0000000000 R11: fffffbfff1f0b6e6 R12: 000000000000000a
R13: ffffffff8b77bfc0 R14: ffffc9001361f900 R15: 0000000000000009
FS: 00007f1772f61c80(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f72e41a8000 CR3: 0000000061da4000 CR4: 00000000003506f0
Call Trace:
stack_depot_save_flags+0x29/0x860 lib/stackdepot.c:650
kasan_save_stack mm/kasan/common.c:48 [inline]
kasan_save_track+0x51/0x80 mm/kasan/common.c:68
kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:586
poison_slab_object+0xa6/0xe0 mm/kasan/common.c:240
__kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
kasan_slab_free include/linux/kasan.h:184 [inline]
slab_free_hook mm/slub.c:2122 [inline]
slab_free mm/slub.c:4296 [inline]
kfree+0x14a/0x380 mm/slub.c:4406
tomoyo_path_number_perm+0x68d/0x880 security/tomoyo/file.c:736
security_file_ioctl+0x75/0xb0 security/security.c:2725
__do_sys_ioctl fs/ioctl.c:865 [inline]
__se_sys_ioctl+0x47/0x170 fs/ioctl.c:857
do_syscall_64+0xfb/0x240
entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7f1772b1ad49
Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8
RSP: 002b:00007ffd53fc3278 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 000055e0ec08e3e0 RCX: 00007f1772b1ad49
RDX: 000055e0ec08e408 RSI: 0000000000001268 RDI: 0000000000000009
RBP: 000055e0ec08e3e0 R08: 0000000000000000 R09: 00007f177305f9c0
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000055e0ec08e4a8 R14: 0000000000100000 R15: 00007f17730650a0