INFO: task syz-executor.0:21740 blocked for more than 143 seconds.
Not tainted 5.15.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26256 pid:21740 ppid: 6477 flags:0x00024004
Call Trace:
context_switch kernel/sched/core.c:4969 [inline]
__schedule+0xb72/0x1460 kernel/sched/core.c:6250
schedule+0x12b/0x1f0 kernel/sched/core.c:6323
io_uring_cancel_generic+0x5b3/0x661 fs/io_uring.c:9850
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+0x16b0/0x2090 kernel/signal.c:2820
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: 0033:0x7fb3a8584ae9
RSP: 002b:00007fb3a5ab8218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fb3a86980e8 RCX: 00007fb3a8584ae9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fb3a86980e8
RBP: 00007fb3a86980e0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fb3a86980ec
R13: 00007ffdbf71b89f R14: 00007fb3a5ab8300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8cb1d900 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-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:105
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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 939 Comm: kworker/u4:4 Not tainted 5.15.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: bat_events batadv_nc_worker
RIP: 0010:check_kcov_mode kernel/kcov.c:174 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x33/0x60 kernel/kcov.c:197
Code: c0 6f 02 00 65 8b 15 14 25 7e 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 a4 15 00 00 00 74 2c 8b 91 80 15 00 00 <83> fa 02 75 21 48 8b 91 88 15 00 00 48 8b 32 48 8d 7e 01 8b 89 84
RSP: 0018:ffffc90003e17a88 EFLAGS: 00000046
RAX: ffffffff818ae32b RBX: 0000000000000000 RCX: ffff88801bc01d00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90003e17b50 R08: ffffffff818ae310 R09: ffffed1010740af1
R10: ffffed1010740af1 R11: 0000000000000000 R12: dffffc0000000000
R13: 1ffff920007c2f5c R14: ffffc90003e17ae0 R15: 0000000000000201
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1bd2c81008 CR3: 000000000c88e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
trace_hardirqs_on+0x4b/0x80 kernel/trace/trace_preemptirq.c:44
__local_bh_enable_ip+0x163/0x1f0 kernel/softirq.c:388
spin_unlock_bh include/linux/spinlock.h:395 [inline]
batadv_nc_purge_paths+0x35f/0x3f0 net/batman-adv/network-coding.c:475
batadv_nc_worker+0x2da/0x5b0 net/batman-adv/network-coding.c:724
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: c0 6f 02 00 shrb $0x0,0x2(%rdi)
4: 65 8b 15 14 25 7e 7e mov %gs:0x7e7e2514(%rip),%edx # 0x7e7e251f
b: f7 c2 00 01 ff 00 test $0xff0100,%edx
11: 74 11 je 0x24
13: f7 c2 00 01 00 00 test $0x100,%edx
19: 74 35 je 0x50
1b: 83 b9 a4 15 00 00 00 cmpl $0x0,0x15a4(%rcx)
22: 74 2c je 0x50
24: 8b 91 80 15 00 00 mov 0x1580(%rcx),%edx
* 2a: 83 fa 02 cmp $0x2,%edx <-- trapping instruction
2d: 75 21 jne 0x50
2f: 48 8b 91 88 15 00 00 mov 0x1588(%rcx),%rdx
36: 48 8b 32 mov (%rdx),%rsi
39: 48 8d 7e 01 lea 0x1(%rsi),%rdi
3d: 8b .byte 0x8b
3e: 89 .byte 0x89
3f: 84 .byte 0x84