INFO: task syz-executor449:3610 blocked for more than 143 seconds.
Not tainted 6.0.0-rc2-next-20220823-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor449 state:D stack:28024 pid:3610 ppid:3609 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5197 [inline]
__schedule+0xae5/0x52c0 kernel/sched/core.c:6509
schedule+0xda/0x1b0 kernel/sched/core.c:6585
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6644
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa44/0x1350 kernel/locking/mutex.c:747
blkdev_put+0xbc/0x770 block/bdev.c:910
blkdev_close+0x64/0x80 block/fops.c:499
__fput+0x27c/0xa90 fs/file_table.c:320
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
exit_task_work include/linux/task_work.h:38 [inline]
do_exit+0xc3f/0x2b60 kernel/exit.c:818
do_group_exit+0xd0/0x2a0 kernel/exit.c:948
get_signal+0x238c/0x2610 kernel/signal.c:2858
arch_do_signal_or_restart+0x82/0x2300 arch/x86/kernel/signal.c:869
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+0x19/0x50 kernel/entry/common.c:294
do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f75bc80f6b9
RSP: 002b:00007fffe8cefa28 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffe00 RBX: 0000000000000000 RCX: 00007f75bc80f6b9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 0000000000000000 R08: 00007fffe8cefbc8 R09: 00007fffe8cefbc8
R10: 00007fffe8cefbc8 R11: 0000000000000246 R12: 00007f75bc7ce740
R13: 431bde82d7b634db R14: 0000000000000000 R15: 0000000000000000
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.0.0-rc2-next-20220823-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x46/0x14f lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x206/0x250 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:227 [inline]
watchdog+0xcf7/0xfd0 kernel/hung_task.c:384
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 41 Comm: kworker/u4:2 Not tainted 6.0.0-rc2-next-20220823-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
Workqueue: events_unbound toggle_allocation_gate
RIP: 0010:insn_set_byte arch/x86/include/asm/insn.h:36 [inline]
RIP: 0010:insn_get_opcode.part.0+0xba/0x990 arch/x86/lib/insn.c:279
Code: 38 d0 7f 08 84 c0 0f 85 93 07 00 00 48 8d 73 18 0f b6 6d 00 4c 89 63 68 48 b8 00 00 00 00 00 fc ff df 48 89 f2 48 89 74 24 18 <83> e6 07 48 c1 ea 03 0f b6 04 02 41 89 ed 40 38 f0 7f 08 84 c0 0f
RSP: 0018:ffffc90000b27900 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: ffffc90000b27a78 RCX: 0000000000000000
RDX: ffffc90000b27a90 RSI: ffffc90000b27a90 RDI: ffffc90000b27a78
RBP: 000000000000000f R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff89e6ad6b
R13: 0000000000000000 R14: 1ffff92000164f49 R15: ffffffff89e6ad6a
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b9e9c77680 CR3: 000000000bc8e000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
insn_get_opcode arch/x86/lib/insn.c:271 [inline]
insn_get_modrm+0x355/0x7c0 arch/x86/lib/insn.c:343
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+0x35b/0x3b0 arch/x86/lib/insn.c:747
text_poke_loc_init+0xa6/0x450 arch/x86/kernel/alternative.c:1580
arch_jump_label_transform_queue+0x94/0x100 arch/x86/kernel/jump_label.c:138
__jump_label_update+0x12e/0x410 kernel/jump_label.c:447
jump_label_update+0x32f/0x410 kernel/jump_label.c:801
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:825 [inline]
toggle_allocation_gate+0x183/0x390 mm/kfence/core.c:803
process_one_work+0x991/0x1610 kernel/workqueue.c:2289
worker_thread+0x665/0x1080 kernel/workqueue.c:2436
kthread+0x2e4/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.133 msecs