INFO: task syz-executor772:4260 blocked for more than 143 seconds.
Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor772 state:D stack:25104 pid: 4260 ppid: 3656 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4995 [inline]
__schedule+0x926/0x1080 kernel/sched/core.c:6304
schedule+0x12b/0x1f0 kernel/sched/core.c:6377
schedule_timeout+0xac/0x300 kernel/time/timer.c:1857
do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x46/0x60 kernel/sched/completion.c:138
kthread_stop+0xf8/0x200 kernel/kthread.c:709
ext4_stop_mmpd+0x43/0xb0 fs/ext4/mmp.c:255
__ext4_fill_super+0x9b13/0xf6f0 fs/ext4/super.c:5505
ext4_fill_super+0x30d/0x6f0 fs/ext4/super.c:5554
get_tree_bdev+0x406/0x630 fs/super.c:1292
vfs_get_tree+0x86/0x270 fs/super.c:1497
do_new_mount fs/namespace.c:3024 [inline]
path_mount+0x1986/0x2c30 fs/namespace.c:3354
do_mount fs/namespace.c:3367 [inline]
__do_sys_mount fs/namespace.c:3575 [inline]
__se_sys_mount+0x308/0x3c0 fs/namespace.c:3552
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x7f484e9c047a
RSP: 002b:00007ffdb5d8e848 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffdb5d8e8a0 RCX: 00007f484e9c047a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffdb5d8e860
RBP: 00007ffdb5d8e860 R08: 00007ffdb5d8e8a0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000206 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8cd1d460 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3271:
#0: ffff88814af19098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6c5/0x1c60 drivers/tty/n_tty.c:2075
1 lock held by syz-executor772/4260:
#0: ffff888073a880e0 (&type->s_umount_key#27/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x820 fs/super.c:228
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #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:111
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:212 [inline]
watchdog+0xc82/0xcd0 kernel/hung_task.c:369
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 54 Comm: kworker/u4:3 Not tainted 5.17.0-rc5-syzkaller-00272-g9137eda53752 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:hlock_class kernel/locking/lockdep.c:194 [inline]
RIP: 0010:__lock_acquire+0x1036/0x2b00 kernel/locking/lockdep.c:5023
Code: b9 0c 00 4c 8b 64 24 18 0f 85 56 03 00 00 83 bc 24 88 00 00 00 00 0f 84 9a 02 00 00 4d 8d 75 f8 4c 89 f0 48 c1 e8 03 8a 04 38 <84> c0 0f 85 32 15 00 00 41 8b 1e 81 e3 ff 1f 00 00 48 89 d8 48 c1
RSP: 0018:ffffc90001a2f480 EFLAGS: 00000806
RAX: 1ffff11002bfec00 RBX: 0000000099b1225f RCX: 000000005e1cc7fd
RDX: 00000000342767de RSI: 000000001fb2f96f RDI: dffffc0000000000
RBP: ffffc90001a2f5d0 R08: dffffc0000000000 R09: fffffbfff203cbc7
R10: fffffbfff203cbc7 R11: 0000000000000000 R12: ffff888015ff5700
R13: ffff888015ff6228 R14: ffff888015ff6220 R15: 74d2cd9d99b1225f
FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005564e355e038 CR3: 000000000ca8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lock_acquire+0x19f/0x4d0 kernel/locking/lockdep.c:5639
__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+0x2ad/0x390 mm/memory.c:1745
get_locked_pte include/linux/mm.h:2128 [inline]
__text_poke+0x280/0x9f0 arch/x86/kernel/alternative.c:1000
text_poke arch/x86/kernel/alternative.c:1083 [inline]
text_poke_bp_batch+0x680/0x920 arch/x86/kernel/alternative.c:1364
text_poke_flush arch/x86/kernel/alternative.c:1470 [inline]
text_poke_finish+0x16/0x30 arch/x86/kernel/alternative.c:1477
arch_jump_label_transform_apply+0x13/0x20 arch/x86/kernel/jump_label.c:146
static_key_enable_cpuslocked+0x12d/0x250 kernel/jump_label.c:177
static_key_enable+0x16/0x20 kernel/jump_label.c:190
toggle_allocation_gate+0xbf/0x460 mm/kfence/core.c:735
process_one_work+0x86c/0x1190 kernel/workqueue.c:2307
worker_thread+0xab1/0x1300 kernel/workqueue.c:2454
kthread+0x2a3/0x2d0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.076 msecs
----------------
Code disassembly (best guess):
0: b9 0c 00 4c 8b mov $0x8b4c000c,%ecx
5: 64 24 18 fs and $0x18,%al
8: 0f 85 56 03 00 00 jne 0x364
e: 83 bc 24 88 00 00 00 cmpl $0x0,0x88(%rsp)
15: 00
16: 0f 84 9a 02 00 00 je 0x2b6
1c: 4d 8d 75 f8 lea -0x8(%r13),%r14
20: 4c 89 f0 mov %r14,%rax
23: 48 c1 e8 03 shr $0x3,%rax
27: 8a 04 38 mov (%rax,%rdi,1),%al
* 2a: 84 c0 test %al,%al <-- trapping instruction
2c: 0f 85 32 15 00 00 jne 0x1564
32: 41 8b 1e mov (%r14),%ebx
35: 81 e3 ff 1f 00 00 and $0x1fff,%ebx
3b: 48 89 d8 mov %rbx,%rax
3e: 48 rex.W
3f: c1 .byte 0xc1