INFO: task syz-executor.4:27018 blocked for more than 143 seconds.
Not tainted 5.18.0-rc6-next-20220513-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26776 pid:27018 ppid: 3640 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0xaa0/0x4cd0 kernel/sched/core.c:6428
schedule+0xd2/0x1f0 kernel/sched/core.c:6500
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1881
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
io_wq_exit_workers fs/io-wq.c:1266 [inline]
io_wq_put_and_exit+0x4d6/0xe40 fs/io-wq.c:1301
io_uring_clean_tctx fs/io_uring.c:11337 [inline]
io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:11407
io_uring_files_cancel include/linux/io_uring.h:44 [inline]
do_exit+0x4f9/0x2a00 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x2542/0x2600 kernel/signal.c:2857
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop kernel/entry/common.c:166 [inline]
exit_to_user_mode_prepare+0x15f/0x250 kernel/entry/common.c:201
__syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline]
syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fb1cd8890e9
RSP: 002b:00007fb1cea72168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000dc9 RBX: 00007fb1cd99bf60 RCX: 00007fb1cd8890e9
RDX: 0000000000000000 RSI: 0000000000000dc9 RDI: 0000000000000004
RBP: 00007fb1cea721d0 R08: 0000000000000000 R09: 0040000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffefd6ad26f R14: 00007fb1cea72300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bd867d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:502
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bd86450 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xc70 kernel/rcu/tasks.h:502
1 lock held by khungtaskd/29:
#0: ffffffff8bd87320 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
1 lock held by klogd/2970:
2 locks held by getty/3290:
#0: ffff888024657098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002cd62e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2118
2 locks held by kworker/u4:17/10191:
1 lock held by iou-wrk-27018/27023:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 5.18.0-rc6-next-20220513-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+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:297
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 2970 Comm: klogd Not tainted 5.18.0-rc6-next-20220513-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:check_kcov_mode+0x2c/0x40 kernel/kcov.c:177
Code: 05 89 c9 87 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 7c 15 00 00 85 d2 74 0b 8b 86 58 15 00 00 <39> f8 0f 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0
RSP: 0018:ffffc90002adf688 EFLAGS: 00000046
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff88807df91d40 RDI: 0000000000000003
RBP: ffffffff907c9c40 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8180f823 R11: 0000000000000001 R12: 0000000000000a06
R13: 0000000000000000 R14: dead000000000100 R15: dffffc0000000000
FS: 00007fc2099df800(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055e6df68b6a8 CR3: 0000000024414000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
write_comp_data kernel/kcov.c:221 [inline]
__sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:287
trace_hardirqs_off+0x23/0x1b0 kernel/trace/trace_preemptirq.c:78
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline]
_raw_spin_lock_irqsave+0x4e/0x50 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:980 [inline]
debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1023
free_pages_prepare mm/page_alloc.c:1360 [inline]
free_pcp_prepare+0x2f0/0xd20 mm/page_alloc.c:1404
free_unref_page_prepare mm/page_alloc.c:3290 [inline]
free_unref_page+0x19/0x7b0 mm/page_alloc.c:3405
__unfreeze_partials+0x17c/0x1a0 mm/slub.c:2521
qlink_free mm/kasan/quarantine.c:168 [inline]
qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294
__kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446
kasan_slab_alloc include/linux/kasan.h:224 [inline]
slab_post_alloc_hook mm/slab.h:750 [inline]
slab_alloc_node mm/slub.c:3214 [inline]
kmem_cache_alloc_node+0x255/0x3f0 mm/slub.c:3264
__alloc_skb+0x215/0x340 net/core/skbuff.c:413
alloc_skb include/linux/skbuff.h:1425 [inline]
alloc_skb_with_frags+0x93/0x730 net/core/skbuff.c:5989
sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2645
unix_dgram_sendmsg+0x425/0x1ad0 net/unix/af_unix.c:1895
sock_sendmsg_nosec net/socket.c:714 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:734
__sys_sendto+0x21a/0x320 net/socket.c:2119
__do_sys_sendto net/socket.c:2131 [inline]
__se_sys_sendto net/socket.c:2127 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2127
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x46/0xb0
RIP: 0033:0x7fc209b7b0ac
Code: 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 19 45 31 c9 45 31 c0 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 64 c3 0f 1f 00 55 48 83 ec 20 48 89 54 24 10
RSP: 002b:00007ffd7b579888 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fc209b7b0ac
RDX: 000000000000005d RSI: 0000563a3ce13440 RDI: 0000000000000003
RBP: 0000563a3ce0b910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000001 R14: 00007fc209cf677d R15: 00007ffd7b579998
----------------
Code disassembly (best guess):
0: 05 89 c9 87 7e add $0x7e87c989,%eax
5: 89 c2 mov %eax,%edx
7: 81 e2 00 01 00 00 and $0x100,%edx
d: a9 00 01 ff 00 test $0xff0100,%eax
12: 74 10 je 0x24
14: 31 c0 xor %eax,%eax
16: 85 d2 test %edx,%edx
18: 74 15 je 0x2f
1a: 8b 96 7c 15 00 00 mov 0x157c(%rsi),%edx
20: 85 d2 test %edx,%edx
22: 74 0b je 0x2f
24: 8b 86 58 15 00 00 mov 0x1558(%rsi),%eax
* 2a: 39 f8 cmp %edi,%eax <-- trapping instruction
2c: 0f 94 c0 sete %al
2f: c3 retq
30: 66 66 2e 0f 1f 84 00 data16 nopw %cs:0x0(%rax,%rax,1)
37: 00 00 00 00
3b: 0f 1f 00 nopl (%rax)
3e: 31 c0 xor %eax,%eax