INFO: task syz.1.1775:14889 blocked for more than 153 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.1.1775 state:D stack:26320 pid:14889 tgid:14888 ppid:12913 flags:0x00004006
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+0x79/0x2f0 drivers/usb/misc/chaoskey.c:299
__fput+0x23f/0x880 fs/file_table.c:431
task_work_run+0x24f/0x310 kernel/task_work.c:228
get_signal+0x15e8/0x1740 kernel/signal.c:2690
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: 0033:0x7f7bc637dff9
RSP: 002b:00007f7bc70a8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: fffffffffffffe00 RBX: 00007f7bc6535f80 RCX: 00007f7bc637dff9
RDX: 0000000000000080 RSI: 0000000020000200 RDI: 0000000000000006
RBP: 00007f7bc63f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7bc6535f80 R15: 00007ffe4eab9878
INFO: task syz.1.1775:14924 blocked for more than 155 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.1.1775 state:D stack:26608 pid:14924 tgid:14888 ppid:12913 flags:0x00004006
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: 0033:0x7f7bc637dff9
RSP: 002b:00007f7bc5dff038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007f7bc6536058 RCX: 00007f7bc637dff9
RDX: 0000000000000000 RSI: ffffffffffffffff RDI: 0000000000000003
RBP: 00007f7bc63f0296 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f7bc6536058 R15: 00007ffe4eab9878
INFO: lockdep is turned off.
NMI backtrace for cpu 1
CPU: 1 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 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 16243 Comm: syz-executor 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:page_ref_count include/linux/page_ref.h:67 [inline]
RIP: 0010:page_expected_state mm/page_alloc.c:865 [inline]
RIP: 0010:free_page_is_bad mm/page_alloc.c:914 [inline]
RIP: 0010:free_pages_prepare mm/page_alloc.c:1100 [inline]
RIP: 0010:free_unref_page+0xc05/0xf20 mm/page_alloc.c:2674
Code: 83 f8 ff 0f 85 e3 02 00 00 48 b8 00 00 00 00 00 fc ff df 80 7c 05 00 00 74 08 4c 89 ff e8 73 fb 0e 00 48 8b 04 24 4c 8b 78 18 <48> 8d 58 34 48 89 df be 04 00 00 00 e8 ca fd 0e 00 48 89 d8 48 c1
RSP: 0018:ffffc90004037878 EFLAGS: 00000246
RAX: ffffea0001135380 RBX: ffffea00011353b0 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea00011353b0
RBP: 1ffffd4000226a73 R08: ffffea00011353b3 R09: 1ffffd4000226a76
R10: dffffc0000000000 R11: fffff94000226a77 R12: 0000000000000000
R13: ffffea0001135388 R14: 1ffffd4000226a71 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055b3e5e87058 CR3: 000000000e734000 CR4: 00000000003526f0
Call Trace:
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: 0033:0x7f5b7f974257
Code: Unable to access opcode bytes at 0x7f5b7f97422d.
RSP: 002b:00007ffffd08e170 EFLAGS: 00000293 ORIG_RAX: 000000000000003d
RAX: fffffffffffffe00 RBX: 0000000000000021 RCX: 00007f5b7f974257
RDX: 0000000040000000 RSI: 00007ffffd08e1cc RDI: 00000000ffffffff
RBP: 00007ffffd08e1cc R08: 0000000000000000 R09: 7fffffffffffffff
R10: 0000000000000000 R11: 0000000000000293 R12: 000055558565d5eb
R13: 000055558565d590 R14: 00000000000c386d R15: 00007ffffd08e220