INFO: task kworker/u4:0:10 blocked for more than 143 seconds.
Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:0 state:D stack:26592 pid:10 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_mark_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x1d15/0x5790 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x1be/0x2c0 kernel/rcu/srcutree.c:1360
fsnotify_mark_destroy_workfn+0x101/0x3c0 fs/notify/mark.c:898
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407
process_scheduled_works kernel/workqueue.c:2470 [inline]
worker_thread+0x881/0x10c0 kernel/workqueue.c:2556
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
INFO: task syz-executor.0:5044 blocked for more than 144 seconds.
Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:23856 pid:5044 ppid:1 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x1d15/0x5790 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x1be/0x2c0 kernel/rcu/srcutree.c:1360
unregister_shrinker mm/vmscan.c:822 [inline]
unregister_shrinker+0x1d2/0x2e0 mm/vmscan.c:805
mb_cache_destroy+0x23/0x330 fs/mbcache.c:409
ext4_xattr_destroy_cache+0x1f/0x30 fs/ext4/xattr.c:3236
ext4_put_super+0x697/0xf00 fs/ext4/super.c:1341
generic_shutdown_super+0x158/0x480 fs/super.c:500
kill_block_super+0xa1/0x100 fs/super.c:1407
deactivate_locked_super+0x98/0x160 fs/super.c:331
deactivate_super+0xb1/0xd0 fs/super.c:362
cleanup_mnt+0x2ae/0x3d0 fs/namespace.c:1177
task_work_run+0x16f/0x270 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop kernel/entry/common.c:171 [inline]
exit_to_user_mode_prepare+0x210/0x240 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: 0033:0x7fd4b648d5d7
RSP: 002b:00007ffd8eb14218 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fd4b648d5d7
RDX: 00007ffd8eb142eb RSI: 000000000000000a RDI: 00007ffd8eb142e0
RBP: 00007ffd8eb142e0 R08: 00000000ffffffff R09: 00007ffd8eb140b0
R10: 0000555556d3c893 R11: 0000000000000246 R12: 00007fd4b64e6cdc
R13: 00007ffd8eb153a0 R14: 0000555556d3c810 R15: 00007ffd8eb153e0
INFO: task kworker/u4:13:5323 blocked for more than 144 seconds.
Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/u4:13 state:D stack:26800 pid:5323 ppid:2 flags:0x00004000
Workqueue: events_unbound fsnotify_connector_destroy_workfn
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0x1d15/0x5790 kernel/sched/core.c:6669
schedule+0xde/0x1a0 kernel/sched/core.c:6745
schedule_timeout+0x276/0x2b0 kernel/time/timer.c:2143
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x1ce/0x5c0 kernel/sched/completion.c:106
__synchronize_srcu+0x1be/0x2c0 kernel/rcu/srcutree.c:1360
fsnotify_connector_destroy_workfn+0x4d/0xa0 fs/notify/mark.c:208
process_one_work+0x99a/0x15e0 kernel/workqueue.c:2407
process_scheduled_works kernel/workqueue.c:2470 [inline]
worker_thread+0x881/0x10c0 kernel/workqueue.c:2556
kthread+0x344/0x440 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Showing all locks held in the system:
2 locks held by kworker/0:0/7:
2 locks held by kworker/u4:0/10:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc900000f7db0 ((reaper_work).work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8c798530 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8c798230 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:522
3 locks held by kworker/1:0/22:
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff8880281c3d38 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc900001c7db0 ((work_completion)(&(&net->ipv6.addr_chk_work)->work)){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382
#2: ffffffff8e11c768 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_verify_work+0x12/0x30 net/ipv6/addrconf.c:4630
1 lock held by khungtaskd/28:
#0: ffffffff8c799140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x390 kernel/locking/lockdep.c:6559
2 locks held by getty/4757:
#0: ffff88802d4da098 (&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:2176
1 lock held by syz-executor.0/5044:
#0: ffff8880908e80e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
2 locks held by kworker/0:1/5045:
1 lock held by syz-executor.3/5057:
#0: ffff8880940ac0e0 (&type->s_umount_key#82){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
1 lock held by syz-executor.5/5061:
#0: ffff88801ef160e0 (&type->s_umount_key#82){+.+.}-{3:3}, at: deactivate_super+0xa9/0xd0 fs/super.c:361
2 locks held by kworker/0:7/5139:
2 locks held by kworker/0:8/5157:
3 locks held by kworker/u4:8/5285:
2 locks held by kworker/u4:13/5323:
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline]
#0: ffff888012479138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x883/0x15e0 kernel/workqueue.c:2378
#1: ffffc90005827db0 (connector_reaper_work){+.+.}-{0:0}, at: process_one_work+0x8b7/0x15e0 kernel/workqueue.c:2382
2 locks held by kworker/0:12/9429:
2 locks held by kworker/0:14/9432:
3 locks held by syz-executor.1/11296:
#0: ffffffff8e108d90 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x4cb/0x8e0 net/core/net_namespace.c:487
#1: ffffffff8e11c768 (rtnl_mutex){+.+.}-{3:3}, at: ip_tunnel_delete_nets+0x94/0x3a0 net/ipv4/ip_tunnel.c:1139
#2: ffffffff8c640870 (cpu_hotplug_lock){++++}-{0:0}, at: flush_all_backlogs net/core/dev.c:5849 [inline]
#2: ffffffff8c640870 (cpu_hotplug_lock){++++}-{0:0}, at: unregister_netdevice_many_notify+0x4ef/0x18c0 net/core/dev.c:10864
2 locks held by syz-executor.2/11290:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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+0x344/0x440 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: 11290 Comm: syz-executor.2 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:unwind_next_frame+0x14a/0x1e30 arch/x86/kernel/unwind_orc.c:466
Code: f2 83 e2 07 38 d0 7f 08 84 c0 0f 85 5e 09 00 00 48 89 e9 41 0f b6 45 35 48 ba 00 00 00 00 00 fc ff df 48 c1 e9 03 80 3c 11 00 <0f> 85 3f 16 00 00 4d 8b 7d 48 3c 01 49 83 df 00 4d 85 ff 0f 84 e7
RSP: 0018:ffffc90000006c48 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000002 RCX: 1ffff92000000da0
RDX: dffffc0000000000 RSI: ffffffff81d6ddd9 RDI: 0000000000000001
RBP: ffffc90000006d00 R08: 0000000000000001 R09: ffffc90000007088
R10: ffffc90000006cb8 R11: 0000000000094001 R12: ffffc90000006d08
R13: ffffc90000006cb8 R14: ffffc90000006ced R15: ffffea0001f891c0
FS: 00007f8e0bbdd700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f8e0bbfe9d0 CR3: 000000007ac03000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
arch_stack_walk+0x81/0xf0 arch/x86/kernel/stacktrace.c:25
stack_trace_save+0x90/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x22/0x40 mm/kasan/common.c:45
kasan_set_track+0x25/0x30 mm/kasan/common.c:52
kasan_save_free_info+0x2e/0x40 mm/kasan/generic.c:521
____kasan_slab_free mm/kasan/common.c:236 [inline]
____kasan_slab_free+0x160/0x1c0 mm/kasan/common.c:200
kasan_slab_free include/linux/kasan.h:162 [inline]
slab_free_hook mm/slub.c:1781 [inline]
slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1807
slab_free mm/slub.c:3786 [inline]
kmem_cache_free+0xe9/0x480 mm/slub.c:3808
kfree_skbmem+0xef/0x1b0 net/core/skbuff.c:958
__kfree_skb net/core/skbuff.c:1016 [inline]
kfree_skb_reason+0x12b/0x210 net/core/skbuff.c:1051
kfree_skb include/linux/skbuff.h:1236 [inline]
ip6_mc_input+0xa3c/0xf50 net/ipv6/ip6_input.c:588
dst_input include/net/dst.h:468 [inline]
ip6_rcv_finish+0x197/0x2c0 net/ipv6/ip6_input.c:79
ip_sabotage_in+0x22a/0x2a0 net/bridge/br_netfilter_hooks.c:880
nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
nf_hook_slow+0xc9/0x1f0 net/netfilter/core.c:626
nf_hook.constprop.0+0x408/0x710 include/linux/netfilter.h:258
NF_HOOK include/linux/netfilter.h:301 [inline]
ipv6_rcv+0xa2/0x380 net/ipv6/ip6_input.c:309
__netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5491
__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605
netif_receive_skb_internal net/core/dev.c:5691 [inline]
netif_receive_skb+0x133/0x7a0 net/core/dev.c:5750
NF_HOOK include/linux/netfilter.h:303 [inline]
NF_HOOK include/linux/netfilter.h:297 [inline]
br_pass_frame_up+0x303/0x430 net/bridge/br_input.c:68
br_handle_frame_finish+0xd1f/0x1de0 net/bridge/br_input.c:216
br_nf_hook_thresh+0x2fb/0x3f0 net/bridge/br_netfilter_hooks.c:1048
br_nf_pre_routing_finish_ipv6+0x695/0xf30 net/bridge/br_netfilter_ipv6.c:148
NF_HOOK include/linux/netfilter.h:303 [inline]
br_nf_pre_routing_ipv6+0x41b/0x830 net/bridge/br_netfilter_ipv6.c:178
br_nf_pre_routing+0xda4/0x1520 net/bridge/br_netfilter_hooks.c:508
nf_hook_entry_hookfn include/linux/netfilter.h:143 [inline]
nf_hook_bridge_pre net/bridge/br_input.c:272 [inline]
br_handle_frame+0x9cb/0x1320 net/bridge/br_input.c:416
__netif_receive_skb_core+0xa10/0x3900 net/core/dev.c:5385
__netif_receive_skb_one_core+0xae/0x180 net/core/dev.c:5489
__netif_receive_skb+0x1f/0x1c0 net/core/dev.c:5605
process_backlog+0x13e/0x6d0 net/core/dev.c:5933
__napi_poll+0xb3/0x520 net/core/dev.c:6496
napi_poll net/core/dev.c:6563 [inline]
net_rx_action+0x8e4/0xd00 net/core/dev.c:6696
__do_softirq+0x1d4/0x905 kernel/softirq.c:553
do_softirq.part.0+0x87/0xc0 kernel/softirq.c:454
do_softirq kernel/softirq.c:446 [inline]
__local_bh_enable_ip+0x106/0x130 kernel/softirq.c:381
spin_unlock_bh include/linux/spinlock.h:395 [inline]
tcp_metrics_flush_all+0x27c/0x390 net/ipv4/tcp_metrics.c:899
ops_exit_list+0x125/0x170 net/core/net_namespace.c:175
setup_net+0x7fb/0xc50 net/core/net_namespace.c:362
copy_net_ns+0x4ee/0x8e0 net/core/net_namespace.c:491
create_new_namespaces+0x3f6/0xb20 kernel/nsproxy.c:110
copy_namespaces+0x410/0x500 kernel/nsproxy.c:179
copy_process+0x322a/0x7600 kernel/fork.c:2506
kernel_clone+0xeb/0x890 kernel/fork.c:2914
__do_sys_clone3+0x1cd/0x240 kernel/fork.c:3215
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f8e0d08c169
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:00007f8e0bbdd038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f8e0d1ac050 RCX: 00007f8e0d08c169
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007f8e0bbdd050
RBP: 00007f8e0d0e7ca1 R08: 0000000000000000 R09: 0000000000000058
R10: 00007f8e0bbdd050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007ffc6b5ad95f R14: 00007f8e0bbdd300 R15: 0000000000022000