INFO: task syz-executor199:5559 blocked for more than 143 seconds.
Not tainted 5.17.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor199 state:D stack:26944 pid: 5559 ppid: 3626 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:4986 [inline]
__schedule+0xab2/0x4db0 kernel/sched/core.c:6295
schedule+0xd2/0x260 kernel/sched/core.c:6368
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
kthread_stop+0x17a/0x720 kernel/kthread.c:709
ext4_stop_mmpd+0x47/0xd0 fs/ext4/mmp.c:255
__ext4_fill_super fs/ext4/super.c:5505 [inline]
ext4_fill_super+0x9b4c/0xe810 fs/ext4/super.c:5554
get_tree_bdev+0x440/0x760 fs/super.c:1292
vfs_get_tree+0x89/0x2f0 fs/super.c:1497
do_new_mount fs/namespace.c:2994 [inline]
path_mount+0x1320/0x1fa0 fs/namespace.c:3324
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount fs/namespace.c:3522 [inline]
__x64_sys_mount+0x27f/0x300 fs/namespace.c:3522
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: 0033:0x7f7ca922896a
RSP: 002b:00007fff3b6838e8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fff3b683940 RCX: 00007f7ca922896a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007fff3b683900
RBP: 00007fff3b683900 R08: 00007fff3b683940 R09: 0000000000000007
R10: 0000000000000000 R11: 0000000000000202 R12: 00000000200003f8
R13: 0000000000000003 R14: 0000000000000004 R15: 0000000000000005
Showing all locks held in the system:
2 locks held by kworker/u4:1/10:
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline]
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline]
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1280 [inline]
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:631 [inline]
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:658 [inline]
#0: ffff888010c69138 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x890/0x1650 kernel/workqueue.c:2278
#1: ffffc90000cf7db8 ((kfence_timer).work){+.+.}-{0:0}, at: rq_unpin_lock kernel/sched/sched.h:1557 [inline]
#1: ffffc90000cf7db8 ((kfence_timer).work){+.+.}-{0:0}, at: newidle_balance+0x30c/0x1190 kernel/sched/fair.c:10882
1 lock held by khungtaskd/27:
#0: ffffffff8bb83c20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6460
2 locks held by getty/3273:
#0: ffff88814ac14098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90002b632e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xcf0/0x1230 drivers/tty/n_tty.c:2077
1 lock held by syz-executor199/5559:
#0: ffff88807378a0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x1dd/0xa80 fs/super.c:228
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.17.0-rc3-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:212 [inline]
watchdog+0xc1d/0xf50 kernel/hung_task.c:369
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 10 Comm: kworker/u4:1 Not tainted 5.17.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:write_comp_data kernel/kcov.c:221 [inline]
RIP: 0010:__sanitizer_cov_trace_const_cmp4+0x3/0x70 kernel/kcov.c:287
Code: 83 c2 01 48 c7 44 30 e0 02 00 00 00 48 89 7c 30 e8 48 89 4c 30 f0 4c 89 54 d8 20 48 89 10 5b c3 0f 1f 80 00 00 00 00 41 89 f8 03 00 00 00 4c 8b 14 24 89 f1 65 48 8b 34 25 00 70 02 00 e8 14
RSP: 0018:ffffc90000cf7970 EFLAGS: 00000246
RAX: 0000000000000007 RBX: ffffc90000cf7a68 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000cf7a8c R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff8406d921 R11: 0000000000000000 R12: ffffc90000cf7ab4
R13: 0000000000000000 R14: 000000000000b000 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007effb7009680 CR3: 000000000b88e000 CR4: 0000000000350ee0
Call Trace:
insn_get_modrm arch/x86/lib/insn.c:348 [inline]
insn_get_modrm+0xef/0x7c0 arch/x86/lib/insn.c:333
insn_get_sib+0x29c/0x330 arch/x86/lib/insn.c:421
insn_get_displacement+0x346/0x6c0 arch/x86/lib/insn.c:464
insn_get_immediate arch/x86/lib/insn.c:632 [inline]
insn_get_length arch/x86/lib/insn.c:707 [inline]
insn_decode+0x473/0x4e0 arch/x86/lib/insn.c:747
arch_jump_entry_size+0xa0/0x110 arch/x86/kernel/jump_label.c:24
__jump_label_patch+0x7c/0x1b0 arch/x86/kernel/jump_label.c:45
arch_jump_label_transform_queue+0x63/0x100 arch/x86/kernel/jump_label.c:137
__jump_label_update+0x12e/0x400 kernel/jump_label.c:451
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:748 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:726
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
----------------
Code disassembly (best guess):
0: 83 c2 01 add $0x1,%edx
3: 48 c7 44 30 e0 02 00 movq $0x2,-0x20(%rax,%rsi,1)
a: 00 00
c: 48 89 7c 30 e8 mov %rdi,-0x18(%rax,%rsi,1)
11: 48 89 4c 30 f0 mov %rcx,-0x10(%rax,%rsi,1)
16: 4c 89 54 d8 20 mov %r10,0x20(%rax,%rbx,8)
1b: 48 89 10 mov %rdx,(%rax)
1e: 5b pop %rbx
1f: c3 retq
20: 0f 1f 80 00 00 00 00 nopl 0x0(%rax)
27: 41 89 f8 mov %edi,%r8d
* 2a: bf 03 00 00 00 mov $0x3,%edi <-- trapping instruction
2f: 4c 8b 14 24 mov (%rsp),%r10
33: 89 f1 mov %esi,%ecx
35: 65 48 8b 34 25 00 70 mov %gs:0x27000,%rsi
3c: 02 00
3e: e8 .byte 0xe8
3f: 14 .byte 0x14