INFO: task syz-executor.2:11389 can't die for more than 143 seconds.
task:syz-executor.2 state:D stack:29168 pid:11389 ppid: 6873 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:3777 [inline]
__schedule+0xea9/0x2230 kernel/sched/core.c:4526
schedule+0xd0/0x2a0 kernel/sched/core.c:4601
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
io_sq_thread_stop fs/io_uring.c:6906 [inline]
io_finish_async fs/io_uring.c:6920 [inline]
io_sq_offload_create fs/io_uring.c:7595 [inline]
io_uring_create fs/io_uring.c:8671 [inline]
io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007fe564661bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000045d5b9
RDX: 0000000020ffd000 RSI: 0000000020000000 RDI: 000000000000497a
RBP: 000000000118cf98 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020ffd000
R13: 0000000020ffc000 R14: 0000000000000000 R15: 0000000000000000
INFO: task syz-executor.2:11389 blocked for more than 143 seconds.
Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:29168 pid:11389 ppid: 6873 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:3777 [inline]
__schedule+0xea9/0x2230 kernel/sched/core.c:4526
schedule+0xd0/0x2a0 kernel/sched/core.c:4601
schedule_timeout+0x1d8/0x250 kernel/time/timer.c:1855
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x163/0x260 kernel/sched/completion.c:138
io_sq_thread_stop fs/io_uring.c:6906 [inline]
io_finish_async fs/io_uring.c:6920 [inline]
io_sq_offload_create fs/io_uring.c:7595 [inline]
io_uring_create fs/io_uring.c:8671 [inline]
io_uring_setup+0x1495/0x29a0 fs/io_uring.c:8744
do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x45d5b9
Code: Bad RIP value.
RSP: 002b:00007fe564661bf8 EFLAGS: 00000206 ORIG_RAX: 00000000000001a9
RAX: ffffffffffffffda RBX: 0000000020000000 RCX: 000000000045d5b9
RDX: 0000000020ffd000 RSI: 0000000020000000 RDI: 000000000000497a
RBP: 000000000118cf98 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020ffd000
R13: 0000000020ffc000 R14: 0000000000000000 R15: 0000000000000000
INFO: task io_uring-sq:11398 blocked for more than 143 seconds.
Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:io_uring-sq state:D stack:31120 pid:11398 ppid: 2 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:3777 [inline]
__schedule+0xea9/0x2230 kernel/sched/core.c:4526
schedule+0xd0/0x2a0 kernel/sched/core.c:4601
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:4660
kthread+0x2ac/0x4a0 kernel/kthread.c:285
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Showing all locks held in the system:
1 lock held by khungtaskd/1173:
#0: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:5829
1 lock held by in:imklog/6750:
#0: ffff8880a1a84df0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
2 locks held by rs:main Q:Reg/6751:
#0: ffff8880937a4af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:930
#1: ffff888098b42460 (sb_writers#4){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2793 [inline]
#1: ffff888098b42460 (sb_writers#4){.+.+}-{0:0}, at: vfs_write+0x54f/0x730 fs/read_write.c:574
3 locks held by kworker/u4:1/9495:
#0: ffff8880ae735fd8 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x77f/0xe30 kernel/sched/fair.c:10555
#1: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: cpu_of kernel/sched/sched.h:1072 [inline]
#1: ffffffff89c67500 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x3e0 kernel/sched/fair.c:6014
#2: ffff8880ae7255d8 (&base->lock){-.-.}-{2:2}, at: lock_timer_base+0x55/0x1a0 kernel/time/timer.c:947
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 1173 Comm: khungtaskd Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x198/0x1fd lib/dump_stack.c:118
nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105
nmi_trigger_cpumask_backtrace+0x1b3/0x223 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:147 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:253 [inline]
watchdog+0xd89/0xf30 kernel/hung_task.c:339
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9495 Comm: kworker/u4:1 Not tainted 5.9.0-rc3-next-20200903-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:iterate_chain_key kernel/locking/lockdep.c:384 [inline]
RIP: 0010:__lock_acquire+0xbb0/0x5570 kernel/locking/lockdep.c:4414
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 6b 41 00 00 48 83 7b 40 00 0f 84 06 0e 00 00 8b 54 24 10 2b 54 24 50 33 54 24 08 <8b> 4c 24 48 8b 5c 24 38 89 d0 29 d1 c1 c0 06 31 c8 01 da 89 c1 29
RSP: 0018:ffffc90008ecfa40 EFLAGS: 00000086
RAX: dffffc0000000000 RBX: ffffffff8c6adca8 RCX: ffffffff815a193e
RDX: 00000000f9b00828 RSI: 0000000000000008 RDI: ffffffff8c6adce8
RBP: ffff88804c33c9a0 R08: 0000000000000000 R09: ffffffff8c6ab9a7
R10: fffffbfff18d5734 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: ffff88804c33c040 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f769bf4c000 CR3: 000000009dcce000 CR4: 00000000001506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x1f3/0xae0 kernel/locking/lockdep.c:5006
rcu_lock_acquire include/linux/rcupdate.h:248 [inline]
rcu_read_lock include/linux/rcupdate.h:641 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:407 [inline]
batadv_nc_worker+0x12d/0xe50 net/batman-adv/network-coding.c:718
process_one_work+0x94c/0x1670 kernel/workqueue.c:2269
worker_thread+0x64c/0x1120 kernel/workqueue.c:2415
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294