INFO: task syz-executor.1:9855 blocked for more than 143 seconds.
Not tainted 5.18.0-rc3-syzkaller-00080-gd569e86915b7 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:27128 pid: 9855 ppid: 3644 flags:0x20004004
Call Trace:
context_switch kernel/sched/core.c:5073 [inline]
__schedule+0xa9a/0x4cc0 kernel/sched/core.c:6388
schedule+0xd2/0x1f0 kernel/sched/core.c:6460
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1860
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x373/0x530 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:10378 [inline]
io_uring_cancel_generic+0x538/0x5bc fs/io_uring.c:10448
io_uring_files_cancel include/linux/io_uring.h:18 [inline]
do_exit+0x4f9/0x2a00 kernel/exit.c:750
do_group_exit+0xd2/0x2f0 kernel/exit.c:925
get_signal+0x22df/0x24c0 kernel/signal.c:2864
arch_do_signal_or_restart+0x82/0x20f0 arch/x86/kernel/signal.c:867
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+0x19/0x60 kernel/entry/common.c:294
__do_fast_syscall_32+0x72/0xf0 arch/x86/entry/common.c:181
do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:203
entry_SYSENTER_compat_after_hwframe+0x4d/0x5c
RIP: 0023:0xf7f84549
RSP: 002b:00000000f7f7f67c EFLAGS: 00000296 ORIG_RAX: 00000000000000f0
RAX: fffffffffffffe00 RBX: 00000000f6f5afa8 RCX: 0000000000000080
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000f6f5afac
RBP: 0000000000000081 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8bd81de0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6467
2 locks held by getty/3278:
#0: ffff88801dbea098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b832e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcea/0x1230 drivers/tty/n_tty.c:2075
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 5.18.0-rc3-syzkaller-00080-gd569e86915b7 #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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 2952 Comm: klogd Not tainted 5.18.0-rc3-syzkaller-00080-gd569e86915b7 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:qlist_free_all+0xca/0x170 mm/kasan/quarantine.c:120
Code: 43 08 a8 01 0f 85 bd 00 00 00 0f 1f 44 00 00 48 89 df e8 f9 fe ff ff 48 8b 00 f6 c4 02 b8 00 00 00 00 48 0f 44 d8 4c 8b 7b 18 5d ff ff ff 49 83 7f 48 00 0f 85 72 ff ff ff 41 f7 47 08 00 08
RSP: 0018:ffffc90002baf890 EFLAGS: 00000202
RAX: 0000000000000000 RBX: ffffea00010fbc00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff8135c064 RDI: ffffea00010fbc00
RBP: 0000000000000000 R08: 0000000000000000 R09: 000000000000002e
R10: ffffffff8135c05a R11: 000000000000003f R12: dffffc0000000000
R13: ffffc90002baf8d0 R14: ffff888043ef6000 R15: ffff888010c42140
FS: 00007fd5cb012800(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055da63840008 CR3: 0000000023d78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:283
__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:749 [inline]
slab_alloc_node mm/slub.c:3217 [inline]
kmem_cache_alloc_node+0x255/0x3f0 mm/slub.c:3267
__alloc_skb+0x215/0x340 net/core/skbuff.c:414
alloc_skb include/linux/skbuff.h:1300 [inline]
alloc_skb_with_frags+0x93/0x730 net/core/skbuff.c:5995
sock_alloc_send_pskb+0x793/0x920 net/core/sock.c:2600
unix_dgram_sendmsg+0x414/0x1a90 net/unix/af_unix.c:1896
sock_sendmsg_nosec net/socket.c:705 [inline]
sock_sendmsg+0xcf/0x120 net/socket.c:725
__sys_sendto+0x216/0x310 net/socket.c:2040
__do_sys_sendto net/socket.c:2052 [inline]
__se_sys_sendto net/socket.c:2048 [inline]
__x64_sys_sendto+0xdd/0x1b0 net/socket.c:2048
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+0x44/0xae
RIP: 0033:0x7fd5cb1ae0ac
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:00007ffd6799f8f8 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fd5cb1ae0ac
RDX: 0000000000000055 RSI: 000055da6383e000 RDI: 0000000000000003
RBP: 000055da63837910 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000004000 R11: 0000000000000246 R12: 0000000000000014
R13: 0000000000000001 R14: 00007fd5cb32977d R15: 00007ffd6799fa08
----------------
Code disassembly (best guess), 2 bytes skipped:
0: a8 01 test $0x1,%al
2: 0f 85 bd 00 00 00 jne 0xc5
8: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
d: 48 89 df mov %rbx,%rdi
10: e8 f9 fe ff ff callq 0xffffff0e
15: 48 8b 00 mov (%rax),%rax
18: f6 c4 02 test $0x2,%ah
1b: b8 00 00 00 00 mov $0x0,%eax
20: 48 0f 44 d8 cmove %rax,%rbx
24: 4c 8b 7b 18 mov 0x18(%rbx),%r15
* 28: e9 5d ff ff ff jmpq 0xffffff8a <-- trapping instruction
2d: 49 83 7f 48 00 cmpq $0x0,0x48(%r15)
32: 0f 85 72 ff ff ff jne 0xffffffaa
38: 41 rex.B
39: f7 .byte 0xf7
3a: 47 08 00 rex.RXB or %r8b,(%r8)
3d: 08 .byte 0x8