INFO: task syz-executor.4:11387 blocked for more than 143 seconds.
Not tainted 5.16.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:25456 pid:11387 ppid: 6556 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4972 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6253
schedule+0x12b/0x1f0 kernel/sched/core.c:6326
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6385
__mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:680
__mutex_lock kernel/locking/mutex.c:740 [inline]
mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:792
io_uring_del_tctx_node+0xe4/0x2a9 fs/io_uring.c:9777
io_uring_clean_tctx+0x192/0x1d5 fs/io_uring.c:9793
io_uring_cancel_generic+0x624/0x661 fs/io_uring.c:9882
io_uring_files_cancel include/linux/io_uring.h:16 [inline]
do_exit+0x281/0x24f0 kernel/exit.c:787
do_group_exit+0x168/0x2d0 kernel/exit.c:929
get_signal+0x1740/0x2120 kernel/signal.c:2852
arch_do_signal_or_restart+0x9c/0x730 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+0x191/0x220 kernel/entry/common.c:207
__syscall_exit_to_user_mode_work kernel/entry/common.c:289 [inline]
syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:300
do_syscall_64+0x53/0xd0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7ff29ee9cae9
RSP: 002b:00007ff29c412218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007ff29efaff68 RCX: 00007ff29ee9cae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007ff29efaff68
RBP: 00007ff29efaff60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ff29efaff6c
R13: 00007ffc895b15df R14: 00007ff29c412300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1dd40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
1 lock held by kswapd0/91:
1 lock held by in:imklog/6182:
#0: ffff88807e2434f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:990
2 locks held by agetty/6190:
#0: ffff88801c953098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900028f82e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2113
1 lock held by syz-executor.4/11387:
#0: ffff88807eb090a8 (&ctx->uring_lock){+.+.}-{3:3}, at: io_uring_del_tctx_node+0xe4/0x2a9 fs/io_uring.c:9777
1 lock held by syz-executor.4/11399:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc3-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+0x1dc/0x2d8 lib/dump_stack.c:106
nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x16a/0x280 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+0xc82/0xcd0 kernel/hung_task.c:295
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 9308 Comm: kworker/u4:7 Not tainted 5.16.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_purge_orig
RIP: 0010:mark_lock+0x65/0x1e00 kernel/locking/lockdep.c:4566
Code: 41 48 c7 44 24 68 cd 5c 3e 8c 48 c7 44 24 70 b0 5e 66 81 4c 8d 64 24 60 49 c1 ec 03 48 b8 f1 f1 f1 f1 05 f2 f2 f2 4b 89 04 3c <48> b8 f2 f2 f2 f2 f2 00 f2 f2 4b 89 44 3c 0f 43 c6 44 3c 17 f2 48
RSP: 0018:ffffc9000a6b7720 EFLAGS: 00000806
RAX: f2f2f205f1f1f1f1 RBX: ffff88808c9ba7a8 RCX: ffffffff81666041
RDX: 0000000000000006 RSI: ffff88808c9ba788 RDI: ffff88808c9b9d00
RBP: ffffc9000a6b7910 R08: dffffc0000000000 R09: fffffbfff1ff35f8
R10: fffffbfff1ff35f8 R11: 0000000000000000 R12: 1ffff920014d6ef0
R13: ffff88808c9ba758 R14: ffff88808c9b9d00 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c00f22dd50 CR3: 000000000c88e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
mark_held_locks kernel/locking/lockdep.c:4206 [inline]
__trace_hardirqs_on_caller kernel/locking/lockdep.c:4232 [inline]
lockdep_hardirqs_on_prepare+0x37e/0x780 kernel/locking/lockdep.c:4292
trace_hardirqs_on+0x6f/0x80 kernel/trace/trace_preemptirq.c:49
__local_bh_enable_ip+0x163/0x1f0 kernel/softirq.c:388
spin_unlock_bh include/linux/spinlock.h:394 [inline]
batadv_purge_orig_ref+0x33c2/0x34b0 net/batman-adv/originator.c:1259
batadv_purge_orig+0x15/0x60 net/batman-adv/originator.c:1272
process_one_work+0x853/0x1140 kernel/workqueue.c:2298
worker_thread+0xac1/0x1320 kernel/workqueue.c:2445
kthread+0x468/0x490 kernel/kthread.c:327
ret_from_fork+0x1f/0x30
----------------
Code disassembly (best guess):
0: 41 rex.B
1: 48 c7 44 24 68 cd 5c movq $0xffffffff8c3e5ccd,0x68(%rsp)
8: 3e 8c
a: 48 c7 44 24 70 b0 5e movq $0xffffffff81665eb0,0x70(%rsp)
11: 66 81
13: 4c 8d 64 24 60 lea 0x60(%rsp),%r12
18: 49 c1 ec 03 shr $0x3,%r12
1c: 48 b8 f1 f1 f1 f1 05 movabs $0xf2f2f205f1f1f1f1,%rax
23: f2 f2 f2
26: 4b 89 04 3c mov %rax,(%r12,%r15,1)
* 2a: 48 b8 f2 f2 f2 f2 f2 movabs $0xf2f200f2f2f2f2f2,%rax <-- trapping instruction
31: 00 f2 f2
34: 4b 89 44 3c 0f mov %rax,0xf(%r12,%r15,1)
39: 43 c6 44 3c 17 f2 movb $0xf2,0x17(%r12,%r15,1)
3f: 48 rex.W