INFO: task syz-executor.4:16309 blocked for more than 143 seconds.
Not tainted 5.16.0-rc8-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4 state:D stack:26888 pid:16309 ppid: 3776 flags:0x00004004
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_timeout+0x1db/0x2a0 kernel/time/timer.c:1857
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x174/0x270 kernel/sched/completion.c:138
xfs_buf_iowait+0xd5/0x5f0 fs/xfs/xfs_buf.c:1573
__xfs_buf_submit+0x47e/0x800 fs/xfs/xfs_buf.c:1638
xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline]
xfs_buf_read_uncached+0x20d/0x380 fs/xfs/xfs_buf.c:885
xfs_readsb+0x318/0x630 fs/xfs/xfs_mount.c:178
xfs_fs_fill_super+0x721/0x1e90 fs/xfs/xfs_super.c:1481
get_tree_bdev+0x440/0x760 fs/super.c:1295
vfs_get_tree+0x89/0x2f0 fs/super.c:1500
do_new_mount fs/namespace.c:2988 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3318
do_mount fs/namespace.c:3331 [inline]
__do_sys_mount fs/namespace.c:3539 [inline]
__se_sys_mount fs/namespace.c:3516 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3516
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: 0033:0x7f33d0955e99
RSP: 002b:00007f33cf2cb168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f33d0a68f60 RCX: 00007f33d0955e99
RDX: 0000000020000040 RSI: 0000000020000080 RDI: 00000000200000c0
RBP: 00007f33d09afff1 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000000003d6 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd4f877d4f R14: 00007f33cf2cb300 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
2 locks held by getty/3279:
#0: ffff88807ec88098 (&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.4/16309:
#0: ffff888033c680e0 (&type->s_umount_key#94/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xac0 fs/super.c:229
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.16.0-rc8-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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16396 Comm: kworker/u4:57 Not tainted 5.16.0-rc8-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:lock_acquire+0x79/0x510 kernel/locking/lockdep.c:5605
Code: 24 20 e0 b1 5c 81 c7 00 f1 f1 f1 f1 c7 40 04 f1 f1 00 00 c7 40 08 00 00 00 f3 c7 40 0c f3 f3 f3 f3 65 48 8b 04 25 28 00 00 00 <48> 89 84 24 a8 00 00 00 31 c0 e9 f6 02 00 00 65 8b 15 19 63 a5 7e
RSP: 0018:ffffc9000a3af8c8 EFLAGS: 00000286
RAX: fcc57b721db71400 RBX: 1ffff92001475f1b RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888010dbb138
RBP: 0000000000000001 R08: 0000000000000001 R09: 0000000000000000
R10: ffffffff81ad1bae R11: 000000000000003f R12: 0000000000000000
R13: 0000000000000000 R14: ffff888010dbb138 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0153ae790 CR3: 000000000b88e000 CR4: 0000000000350ef0
Call Trace:
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:154
spin_lock include/linux/spinlock.h:349 [inline]
__get_locked_pte+0x2b6/0x4d0 mm/memory.c:1722
get_locked_pte include/linux/mm.h:2160 [inline]
__text_poke+0x1ae/0x8c0 arch/x86/kernel/alternative.c:1000
text_poke_bp_batch+0x3d7/0x560 arch/x86/kernel/alternative.c:1361
text_poke_flush arch/x86/kernel/alternative.c:1451 [inline]
text_poke_flush arch/x86/kernel/alternative.c:1448 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1458
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
jump_label_update+0x1da/0x400 kernel/jump_label.c:830
static_key_disable_cpuslocked+0x152/0x1b0 kernel/jump_label.c:207
static_key_disable+0x16/0x20 kernel/jump_label.c:215
toggle_allocation_gate mm/kfence/core.c:747 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:725
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):
0: 24 20 and $0x20,%al
2: e0 b1 loopne 0xffffffb5
4: 5c pop %rsp
5: 81 c7 00 f1 f1 f1 add $0xf1f1f100,%edi
b: f1 icebp
c: c7 40 04 f1 f1 00 00 movl $0xf1f1,0x4(%rax)
13: c7 40 08 00 00 00 f3 movl $0xf3000000,0x8(%rax)
1a: c7 40 0c f3 f3 f3 f3 movl $0xf3f3f3f3,0xc(%rax)
21: 65 48 8b 04 25 28 00 mov %gs:0x28,%rax
28: 00 00
* 2a: 48 89 84 24 a8 00 00 mov %rax,0xa8(%rsp) <-- trapping instruction
31: 00
32: 31 c0 xor %eax,%eax
34: e9 f6 02 00 00 jmpq 0x32f
39: 65 8b 15 19 63 a5 7e mov %gs:0x7ea56319(%rip),%edx # 0x7ea56359