INFO: task syz-executor235:3811 blocked for more than 143 seconds.
Not tainted 5.19.0-rc2-syzkaller-00052-g979086f5e006 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor235 state:D stack:27344 pid: 3811 ppid: 3609 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5116 [inline]
__schedule+0xa00/0x4b30 kernel/sched/core.c:6428
schedule+0xd2/0x1f0 kernel/sched/core.c:6500
schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1911
do_wait_for_common kernel/sched/completion.c:85 [inline]
__wait_for_common+0x378/0x530 kernel/sched/completion.c:106
kthread_stop+0x17a/0x720 kernel/kthread.c:708
ext4_stop_mmpd+0x47/0xd0 fs/ext4/mmp.c:255
__ext4_fill_super fs/ext4/super.c:5450 [inline]
ext4_fill_super+0x9dd6/0xe860 fs/ext4/super.c:5499
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:3040 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3370
do_mount fs/namespace.c:3383 [inline]
__do_sys_mount fs/namespace.c:3591 [inline]
__se_sys_mount fs/namespace.c:3568 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3568
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: 0033:0x7ff9a755dcea
RSP: 002b:00007fffd746ec68 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fffd746ecc0 RCX: 00007ff9a755dcea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fffd746ec80
RBP: 00007fffd746ec80 R08: 00007fffd746ecc0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200002a8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000007
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8bd84020 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3286:
#0: ffff888022b02098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c482e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
1 lock held by syz-executor235/3811:
#0: ffff88807de960e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xa80 fs/super.c:228
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc2-syzkaller-00052-g979086f5e006 #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:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 998 Comm: kworker/u4:5 Not tainted 5.19.0-rc2-syzkaller-00052-g979086f5e006 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:29 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline]
RIP: 0010:check_preemption_disabled+0x46/0x170 lib/smp_processor_id.c:19
Code: 8b 1d 8e 9f 8b 76 81 e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 <0f> 1f 44 00 00 9c 5b 81 e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00
RSP: 0018:ffffc900045ef970 EFLAGS: 00000046
RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000001
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffffff8a282c40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: ffffffff89cc6700 R14: ffff88801fc8e240 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005636aa323680 CR3: 000000000ba8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:461 [inline]
lock_release+0x15a/0x780 kernel/locking/lockdep.c:5684
__mutex_unlock_slowpath+0x99/0x5e0 kernel/locking/mutex.c:907
arch_jump_label_transform_queue+0xa0/0x100 arch/x86/kernel/jump_label.c:139
__jump_label_update+0x12e/0x400 kernel/jump_label.c:451
jump_label_update+0x32f/0x410 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:822 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:800
process_one_work+0x996/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
----------------
Code disassembly (best guess):
0: 8b 1d 8e 9f 8b 76 mov 0x768b9f8e(%rip),%ebx # 0x768b9f94
6: 81 e3 ff ff ff 7f and $0x7fffffff,%ebx
c: 31 ff xor %edi,%edi
e: 89 de mov %ebx,%esi
10: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
15: 85 db test %ebx,%ebx
17: 74 11 je 0x2a
19: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1)
1e: 44 89 e0 mov %r12d,%eax
21: 5b pop %rbx
22: 5d pop %rbp
23: 41 5c pop %r12
25: 41 5d pop %r13
27: 41 5e pop %r14
29: c3 retq
* 2a: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) <-- trapping instruction
2f: 9c pushfq
30: 5b pop %rbx
31: 81 e3 00 02 00 00 and $0x200,%ebx
37: 31 ff xor %edi,%edi
39: 48 89 de mov %rbx,%rsi
3c: 0f .byte 0xf
3d: 1f (bad)
3e: 44 rex.R