INFO: task syz.4.913:12696 blocked for more than 143 seconds.
Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.913 state:D stack:26480 pid:12696 tgid:12694 ppid:12064 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5322 [inline]
__schedule+0x1895/0x4b30 kernel/sched/core.c:6682
__schedule_loop kernel/sched/core.c:6759 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6774
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6831
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x6a7/0xd70 kernel/locking/mutex.c:752
chaoskey_release+0x169/0x2f0 drivers/usb/misc/chaoskey.c:322
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop kernel/entry/common.c:114 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0x168/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fda0297dff9
RSP: 002b:00007fda036aa038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffed RBX: 00007fda02b35f80 RCX: 00007fda0297dff9
RDX: 0000000000000002 RSI: 0000000020000240 RDI: 0000000000000004
RBP: 00007fda029f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fda02b35f80 R15: 00007fffeac520f8
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xff4/0x1040 kernel/hung_task.c:379
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 14777 Comm: syz.0.1103 Not tainted 6.12.0-rc2-next-20241008-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:debug_spin_lock_before kernel/locking/spinlock_debug.c:86 [inline]
RIP: 0010:do_raw_spin_lock+0x8d/0x370 kernel/locking/spinlock_debug.c:115
Code: f1 04 f3 f3 f3 48 89 f1 48 89 74 24 38 48 89 04 16 48 8d 5f 04 48 89 d8 48 c1 e8 03 0f b6 04 10 84 c0 0f 85 f6 01 00 00 8b 03 <3d> ad 4e ad de 0f 85 62 01 00 00 4d 8d 6c 24 10 4c 89 e8 48 c1 e8
RSP: 0018:ffffc900042575a0 EFLAGS: 00000046
RAX: 00000000dead4ead RBX: ffffffff9a6453f4 RCX: 1ffff9200084aebc
RDX: dffffc0000000000 RSI: 1ffff9200084aebc RDI: ffffffff9a6453f0
RBP: ffffc90004257670 R08: ffffffff901d3f2f R09: 1ffffffff203a7e5
R10: dffffc0000000000 R11: fffffbfff203a7e6 R12: ffffffff9a6453f0
R13: 1ffff9200084aed0 R14: ffffffff9a6453f0 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c6f4a17131 CR3: 0000000024fc6000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:111 [inline]
_raw_spin_lock_irqsave+0xe1/0x120 kernel/locking/spinlock.c:162
__debug_check_no_obj_freed lib/debugobjects.c:978 [inline]
debug_check_no_obj_freed+0x234/0x580 lib/debugobjects.c:1019
free_pages_prepare mm/page_alloc.c:1115 [inline]
free_unref_page+0x41b/0xf20 mm/page_alloc.c:2674
vfree+0x186/0x2e0 mm/vmalloc.c:3377
kcov_put kernel/kcov.c:439 [inline]
kcov_close+0x28/0x50 kernel/kcov.c:535
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
exit_task_work include/linux/task_work.h:40 [inline]
do_exit+0xa2f/0x28e0 kernel/exit.c:939
do_group_exit+0x207/0x2c0 kernel/exit.c:1088
get_signal+0x16a3/0x1740 kernel/signal.c:2917
arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
__syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f21e277dff9
Code: Unable to access opcode bytes at 0x7f21e277dfcf.
RSP: 002b:00007f21e36060e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007f21e2936060 RCX: 00007f21e277dff9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007f21e2936060
RBP: 00007f21e2936058 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f21e2936064
R13: 0000000000000000 R14: 00007fff9598f940 R15: 00007fff9598fa28