INFO: task syz-executor.0:5530 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28032 pid:5530 tgid:5529 ppid:5428 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
__mutex_lock_common kernel/locking/mutex.c:684 [inline]
__mutex_lock+0x5b8/0x9c0 kernel/locking/mutex.c:752
bdev_release+0x166/0x710 block/bdev.c:1059
blkdev_release+0x15/0x20 block/fops.c:628
__fput+0x270/0xb80 fs/file_table.c:422
task_work_run+0x14e/0x250 kernel/task_work.c:180
get_signal+0x1ca/0x2710 kernel/signal.c:2683
arch_do_signal_or_restart+0x90/0x7e0 arch/x86/kernel/signal.c:310
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+0x14a/0x2a0 kernel/entry/common.c:218
do_syscall_64+0xdc/0x260 arch/x86/entry/common.c:89
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa4e5079b69
RSP: 002b:00007fa4e61210c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fa4e518bf80 RCX: 00007fa4e5079b69
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fa4e50d534e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa4e518bf80 R15: 00007ffe619de4e8
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4836:
#0: ffff88802ac340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
1 lock held by udevd/5446:
#0: ffff88801ffb94c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x43c/0xe90 block/bdev.c:877
1 lock held by syz-executor.0/5530:
#0: ffff88801ffb94c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_release+0x166/0x710 block/bdev.c:1059
1 lock held by syz-executor.0/5795:
#0: ffff88801ffb94c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x43c/0xe90 block/bdev.c:877
1 lock held by syz-executor.0/5806:
#0: ffff88801ffb94c8 (&disk->open_mutex){+.+.}-{3:3}, at: bdev_open+0x43c/0xe90 block/bdev.c:877
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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 PID: 4515 Comm: klogd Not tainted 6.9.0-rc5-syzkaller-00159-gc942a0cd3603 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:__sanitizer_cov_trace_switch+0x30/0x90 kernel/kcov.c:320
Code: 41 55 41 54 49 89 fc 55 48 89 f5 53 48 8b 46 08 48 83 f8 20 74 6b 77 48 48 83 f8 08 74 5b 48 83 f8 10 75 2f 41 bd 03 00 00 00 <4c> 8b 75 00 31 db 4d 85 f6 74 1e 48 8b 74 dd 10 4c 89 e2 4c 89 ef
RSP: 0018:ffffc900031277f8 EFLAGS: 00000246
RAX: 0000000000000008 RBX: ffffffff8b0d8341 RCX: ffffffff8accf0de
RDX: 0000000000000002 RSI: ffffffff8c5cc0c0 RDI: 0000000000000075
RBP: ffffffff8c5cc0c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000025 R11: fffffffffffe8fc8 R12: 0000000000000075
R13: 0000000000000001 R14: dffffc0000000000 R15: 0000000000000075
FS: 00007f27f7054380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056001558b600 CR3: 000000007d21a000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
format_decode+0x279/0xba0 lib/vsprintf.c:2575
vsnprintf+0x13d/0x1880 lib/vsprintf.c:2776
sprintf+0xcd/0x110 lib/vsprintf.c:3028
print_syslog kernel/printk/printk.c:1323 [inline]
info_print_prefix+0x2e6/0x350 kernel/printk/printk.c:1353
record_print_text+0x141/0x400 kernel/printk/printk.c:1405
syslog_print+0x4e9/0x5d0 kernel/printk/printk.c:1616
do_syslog+0x3be/0x6a0 kernel/printk/printk.c:1734
__do_sys_syslog kernel/printk/printk.c:1826 [inline]
__se_sys_syslog kernel/printk/printk.c:1824 [inline]
__x64_sys_syslog+0x74/0xb0 kernel/printk/printk.c:1824
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f27f71b5fa7
Code: 73 01 c3 48 8b 0d 81 ce 0c 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 67 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 51 ce 0c 00 f7 d8 64 89 01 48
RSP: 002b:00007fff16df18b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000067
RAX: ffffffffffffffda RBX: 00007f27f73544a0 RCX: 00007f27f71b5fa7
RDX: 00000000000003ff RSI: 00007f27f73544a0 RDI: 0000000000000002
RBP: 0000000000000000 R08: 0000000000000007 R09: 484f21a559d0f93c
R10: 0000000000004000 R11: 0000000000000206 R12: 00007f27f73544a0
R13: 00007f27f7344212 R14: 00007f27f7354876 R15: 00007f27f7354876