INFO: task syz-executor.3:1401 blocked for more than 143 seconds.
Not tainted 5.16.0-rc7-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3 state:D stack:26880 pid: 1401 ppid: 1035 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xa9a/0x4900 kernel/sched/core.c:6253
schedule+0xd2/0x260 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common kernel/locking/mutex.c:680 [inline]
__mutex_lock+0xa32/0x12f0 kernel/locking/mutex.c:740
io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9781
io_uring_clean_tctx fs/io_uring.c:9797 [inline]
io_uring_cancel_generic+0x5da/0x695 fs/io_uring.c:9888
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x60c/0x2b40 kernel/exit.c:787
do_group_exit+0x125/0x310 kernel/exit.c:929
get_signal+0x47d/0x2220 kernel/signal.c:2852
arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:868
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:300
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f1ac33b4e99
RSP: 002b:00007f1ac1ce8168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000800 RBX: 00007f1ac34c8100 RCX: 00007f1ac33b4e99
RDX: 000000000000d54b RSI: 0000000000004315 RDI: 0000000000000004
RBP: 00007f1ac340eff1 R08: 0000000020000100 R09: 0000000000000008
R10: 0000000000000003 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff6e751d0f R14: 00007f1ac1ce8300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8bb83da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6458
1 lock held by klogd/2958:
#0: ffff8880b9d39a98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2b/0x120 kernel/sched/core.c:478
2 locks held by getty/3276:
#0: ffff88814a77d098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:252
#1: ffffc90002b962e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.3/1400:
#0: ffff88802b4760a8 (&ctx->uring_lock){+.+.}-{3:3}, at: tctx_task_work+0x2b3/0x630 fs/io_uring.c:2242
1 lock held by syz-executor.3/1401:
#0: ffff88802b4760a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0x109/0x20a fs/io_uring.c:9781
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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+0x1b3/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:295
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 25501 Comm: kworker/u4:33 Not tainted 5.16.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5640 [inline]
RIP: 0010:lock_acquire+0x1d3/0x510 kernel/locking/lockdep.c:5602
Code: ff ff 48 c7 c7 60 0f ac 89 48 83 c4 20 e8 d5 4a e7 07 b8 ff ff ff ff 65 0f c1 05 d8 c6 a5 7e 83 f8 01 0f 85 b4 02 00 00 9c 58 c4 02 0f 85 9f 02 00 00 48 83 7c 24 08 00 74 01 fb 48 b8 00 00
RSP: 0018:ffffc90004b2fba0 EFLAGS: 00000046
RAX: 0000000000000046 RBX: 1ffff92000965f76 RCX: 49eff3ed7059da23
RDX: 1ffff1100f51314b RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: ffffffff8ff76a07
R10: fffffbfff1feed40 R11: 0000000000000000 R12: 0000000000000002
R13: 0000000000000000 R14: ffffffff8bb83da0 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0000b8580 CR3: 0000000022841000 CR4: 0000000000350ee0
Call Trace:
rcu_lock_acquire include/linux/rcupdate.h:268 [inline]
rcu_read_lock include/linux/rcupdate.h:688 [inline]
batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline]
batadv_nc_worker+0x12d/0xfa0 net/batman-adv/network-coding.c:723
process_one_work+0x9b2/0x1660 kernel/workqueue.c:2298
worker_thread+0x65d/0x1130 kernel/workqueue.c:2445
kthread+0x405/0x4f0 kernel/kthread.c:327
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess), 2 bytes skipped:
0: 48 c7 c7 60 0f ac 89 mov $0xffffffff89ac0f60,%rdi
7: 48 83 c4 20 add $0x20,%rsp
b: e8 d5 4a e7 07 callq 0x7e74ae5
10: b8 ff ff ff ff mov $0xffffffff,%eax
15: 65 0f c1 05 d8 c6 a5 xadd %eax,%gs:0x7ea5c6d8(%rip) # 0x7ea5c6f5
1c: 7e
1d: 83 f8 01 cmp $0x1,%eax
20: 0f 85 b4 02 00 00 jne 0x2da
26: 9c pushfq
27: 58 pop %rax
* 28: f6 c4 02 test $0x2,%ah <-- trapping instruction
2b: 0f 85 9f 02 00 00 jne 0x2d0
31: 48 83 7c 24 08 00 cmpq $0x0,0x8(%rsp)
37: 74 01 je 0x3a
39: fb sti
3a: 48 rex.W
3b: b8 .byte 0xb8