INFO: task syz-executor.2:5511 blocked for more than 140 seconds.
Not tainted 4.19.211-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.2 D28384 5511 8172 0x00000004
team0: Port device bridge141 added
Call Trace:
context_switch kernel/sched/core.c:2828 [inline]
__schedule+0x887/0x2040 kernel/sched/core.c:3517
schedule+0x8d/0x1b0 kernel/sched/core.c:3561
schedule_timeout+0x92d/0xfe0 kernel/time/timer.c:1794
team0: Port device bridge2825 added
romfs: bad initial checksum on dev loop2.
do_wait_for_common kernel/sched/completion.c:83 [inline]
__wait_for_common kernel/sched/completion.c:104 [inline]
wait_for_common+0x29c/0x470 kernel/sched/completion.c:115
__flush_work+0x4bb/0x8b0 kernel/workqueue.c:2926
__cancel_work_timer+0x412/0x590 kernel/workqueue.c:3013
p9_conn_destroy net/9p/trans_fd.c:904 [inline]
p9_fd_close+0x305/0x520 net/9p/trans_fd.c:934
p9_client_create+0x901/0x12e0 net/9p/client.c:1084
v9fs_session_init+0x1dd/0x1770 fs/9p/v9fs.c:421
v9fs_mount+0x73/0x910 fs/9p/vfs_super.c:135
mount_fs+0xa3/0x310 fs/super.c:1261
vfs_kern_mount.part.0+0x68/0x470 fs/namespace.c:961
vfs_kern_mount fs/namespace.c:951 [inline]
do_new_mount fs/namespace.c:2492 [inline]
do_mount+0x115c/0x2f50 fs/namespace.c:2822
ksys_mount+0xcf/0x130 fs/namespace.c:3038
__do_sys_mount fs/namespace.c:3052 [inline]
__se_sys_mount fs/namespace.c:3049 [inline]
__x64_sys_mount+0xba/0x150 fs/namespace.c:3049
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f555f1b2639
Code: Bad RIP value.
RSP: 002b:00007f555d704168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f555f2d3050 RCX: 00007f555f1b2639
RDX: 0000000020000100 RSI: 0000000020000080 RDI: 0000000000000000
RBP: 00007f555f20dae9 R08: 0000000020000180 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc23685ccf R14: 00007f555d704300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/1570:
#0: 00000000f0f95bf3 (rcu_read_lock){....}, at: debug_show_all_locks+0x53/0x265 kernel/locking/lockdep.c:4441
1 lock held by in:imklog/7812:
#0: 0000000086e49b1d (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767
2 locks held by agetty/7828:
#0: 000000005094ff5c (&tty->ldisc_sem){++++}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:272
#1: 00000000df499ad7 (&ldata->atomic_read_lock){+.+.}, at: n_tty_read+0x217/0x1950 drivers/tty/n_tty.c:2154
3 locks held by kworker/u4:8/9552:
#0: 00000000162f16f3 ((wq_completion)"%s""netns"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
#1: 000000008e80ef30 (net_cleanup_work){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
#2: 00000000dd411805 (pernet_ops_rwsem){++++}, at: cleanup_net+0xa8/0x8b0 net/core/net_namespace.c:521
2 locks held by kworker/0:31/3812:
#0: 000000003d51a1da ((wq_completion)"events"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
team0: Port device bridge2826 added
#1: 00000000ac486823 ((work_completion)(&m->wq)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
3 locks held by kworker/0:1/13384:
#0: 0000000079193213 ((wq_completion)"%s"("ipv6_addrconf")){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
#1: 00000000fb6e753b ((work_completion)(&(&ifa->dad_work)->work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
#2: 00000000a0abe582 (rtnl_mutex){+.+.}, at: addrconf_dad_work+0x9c/0x10a0 net/ipv6/addrconf.c:3989
2 locks held by kworker/1:1/1279:
#0: 0000000098f6d35a ((wq_completion)"rcu_gp"){+.+.}, at: process_one_work+0x767/0x1570 kernel/workqueue.c:2124
#1: 00000000960c5903 ((work_completion)(&rew.rew_work)){+.+.}, at: process_one_work+0x79c/0x1570 kernel/workqueue.c:2128
1 lock held by syz-executor.1/11762:
#0: 00000000673c9000 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1510 [inline]
#0: 00000000673c9000 (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read+0x30e/0x6b0 sound/core/oss/pcm_oss.c:2763
2 locks held by syz-executor.4/11769:
#0: 000000009b4c3e86 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
#0: 000000009b4c3e86 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598
#1: 0000000018b80723 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:297 [inline]
#1: 0000000018b80723 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x4dc/0x6f0 kernel/rcu/tree_exp.h:667
1 lock held by syz-executor.5/11771:
#0: 00000000afa82b67 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
#0: 00000000afa82b67 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598
1 lock held by syz-executor.0/11772:
#0: 00000000ad7ffcd0 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
#0: 00000000ad7ffcd0 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598
2 locks held by syz-executor.3/11773:
#0: 0000000037dbf773 (&sb->s_type->i_mutex_key#13){+.+.}, at: inode_lock include/linux/fs.h:748 [inline]
#0: 0000000037dbf773 (&sb->s_type->i_mutex_key#13){+.+.}, at: __sock_release+0x86/0x2a0 net/socket.c:598
#1: 0000000018b80723 (rcu_preempt_state.exp_mutex){+.+.}, at: exp_funnel_lock kernel/rcu/tree_exp.h:329 [inline]
#1: 0000000018b80723 (rcu_preempt_state.exp_mutex){+.+.}, at: _synchronize_rcu_expedited+0x256/0x6f0 kernel/rcu/tree_exp.h:667
1 lock held by syz-executor.1/11809:
#0: 000000006ccf780d (&runtime->oss.params_lock){+.+.}, at: lock_params sound/core/oss/pcm_oss.c:835 [inline]
#0: 000000006ccf780d (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_set_format sound/core/oss/pcm_oss.c:1889 [inline]
#0: 000000006ccf780d (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_ioctl+0x140d/0x3410 sound/core/oss/pcm_oss.c:2642
1 lock held by syz-executor.1/11810:
#0: 000000006ccf780d (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read1 sound/core/oss/pcm_oss.c:1510 [inline]
#0: 000000006ccf780d (&runtime->oss.params_lock){+.+.}, at: snd_pcm_oss_read+0x30e/0x6b0 sound/core/oss/pcm_oss.c:2763
3 locks held by syz-executor.2/11811:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1570 Comm: khungtaskd Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101
nmi_trigger_cpumask_backtrace+0x1a6/0x1f0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:203 [inline]
watchdog+0x991/0xe60 kernel/hung_task.c:287
kthread+0x33f/0x460 kernel/kthread.c:259
ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 11824 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
RIP: 0010:__lock_release kernel/locking/lockdep.c:3704 [inline]
RIP: 0010:lock_release+0x30c/0x8b0 kernel/locking/lockdep.c:3927
Code: 00 00 66 83 68 22 10 66 f7 40 22 f0 ff 0f 85 bd 00 00 00 48 ba 00 00 00 00 00 fc ff df 48 8b 4c 24 08 8b 6c 24 38 48 c1 e9 03 <0f> b6 14 11 84 d2 74 09 80 fa 03 0f 8e 1c 05 00 00 48 89 c1 41 89
RSP: 0018:ffff8880ba107a78 EFLAGS: 00000802
RAX: ffff888027e44a58 RBX: ffffffff8d243760 RCX: 1ffff11004fc8940
RDX: dffffc0000000000 RSI: ffffffff89f95488 RDI: ffff888027e44a7a
RBP: 0000000000000002 R08: ffffffff8cd54e80 R09: 0000000000000001
R10: 0000000000000000 R11: ffffffff8c66505b R12: 1ffff11017420f52
R13: ffffffff81777f28 R14: ffff888027e44180 R15: 0000000000000003
FS: 00007f2698b74700(0000) GS:ffff8880ba100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffe2159c20 CR3: 000000009e948000 CR4: 00000000003406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
seqcount_lockdep_reader_access include/linux/seqlock.h:82 [inline]
read_seqcount_begin include/linux/seqlock.h:164 [inline]
ktime_get+0xe6/0x2f0 kernel/time/timekeeping.c:756
hrtimer_forward_now include/linux/hrtimer.h:479 [inline]
perf_swevent_hrtimer+0x318/0x3e0 kernel/events/core.c:9266
__run_hrtimer kernel/time/hrtimer.c:1465 [inline]
__hrtimer_run_queues+0x3f6/0xe60 kernel/time/hrtimer.c:1527
hrtimer_interrupt+0x326/0x9e0 kernel/time/hrtimer.c:1585
local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1071 [inline]
smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1096
apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:894
RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline]
RIP: 0010:_raw_spin_unlock_irq+0x50/0x80 kernel/locking/spinlock.c:192
Code: c0 98 82 f1 89 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 31 48 83 3d 01 31 d8 01 00 74 25 fb 66 0f 1f 44 00 00 01 00 00 00 e8 26 1b 28 f9 65 8b 05 9f 8d e8 77 85 c0 74 02 5d
RSP: 0018:ffff88801b67f980 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13
RAX: 1ffffffff13e3053 RBX: ffff888027e44180 RCX: 1ffff11004fc894a
RDX: dffffc0000000000 RSI: ffff888027e44a30 RDI: ffff888027e44a04
RBP: ffff8880ba12b0c0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ba12b0c0
R13: ffff88803b310080 R14: 0000000000000000 R15: 0000000000000001
finish_lock_switch kernel/sched/core.c:2578 [inline]
finish_task_switch+0x146/0x760 kernel/sched/core.c:2678
context_switch kernel/sched/core.c:2831 [inline]
__schedule+0x88f/0x2040 kernel/sched/core.c:3517
preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:3641
___preempt_schedule+0x16/0x18
smp_call_function_single+0x3bb/0x420 kernel/smp.c:304
task_function_call+0xe0/0x170 kernel/events/core.c:115
perf_install_in_context+0x238/0x3c0 kernel/events/core.c:2623
__do_sys_perf_event_open kernel/events/core.c:10924 [inline]
__se_sys_perf_event_open+0xe5d/0x2720 kernel/events/core.c:10549
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7f269a601639
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:00007f2698b74168 EFLAGS: 00000246 ORIG_RAX: 000000000000012a
RAX: ffffffffffffffda RBX: 00007f269a721f80 RCX: 00007f269a601639
RDX: ffffffffffffffff RSI: 0000000000000000 RDI: 0000000020000340
RBP: 00007f269a65cae9 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffffffffffff R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe8d909fdf R14: 00007f2698b74300 R15: 0000000000022000