INFO: task udevd:7266 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:25152 pid: 7266 ppid: 2980 flags:0x00004000
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
io_schedule+0xba/0x130 kernel/sched/core.c:8645
folio_wait_bit_common+0x4f2/0xa90 mm/filemap.c:1324
folio_wait_bit mm/filemap.c:1473 [inline]
folio_wait_locked include/linux/pagemap.h:1028 [inline]
folio_wait_locked include/linux/pagemap.h:1025 [inline]
do_read_cache_folio+0x4ff/0x760 mm/filemap.c:3530
do_read_cache_page mm/filemap.c:3602 [inline]
read_cache_page+0x59/0x2a0 mm/filemap.c:3611
read_mapping_page include/linux/pagemap.h:759 [inline]
read_part_sector+0xf6/0x920 block/partitions/core.c:715
adfspart_check_ICS+0x9a/0x690 block/partitions/acorn.c:360
check_partition block/partitions/core.c:147 [inline]
blk_add_partitions block/partitions/core.c:600 [inline]
bdev_disk_changed block/partitions/core.c:686 [inline]
bdev_disk_changed+0x629/0xf60 block/partitions/core.c:653
blkdev_get_whole+0x18a/0x2d0 block/bdev.c:686
blkdev_get_by_dev.part.0+0x5ec/0xb90 block/bdev.c:823
blkdev_get_by_dev+0x6b/0x80 block/bdev.c:857
blkdev_open+0x13c/0x2c0 block/fops.c:481
do_dentry_open+0x4a1/0x11f0 fs/open.c:848
do_open fs/namei.c:3520 [inline]
path_openat+0x1c71/0x2910 fs/namei.c:3653
do_filp_open+0x1aa/0x400 fs/namei.c:3680
do_sys_openat2+0x16d/0x4c0 fs/open.c:1278
do_sys_open fs/open.c:1294 [inline]
__do_sys_openat fs/open.c:1310 [inline]
__se_sys_openat fs/open.c:1305 [inline]
__x64_sys_openat+0x13f/0x1f0 fs/open.c:1305
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+0x46/0xb0
RIP: 0033:0x7f0ce6d25697
RSP: 002b:00007ffcff2909a0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000564952443710 RCX: 00007f0ce6d25697
RDX: 00000000000a0800 RSI: 0000564952433b10 RDI: 00000000ffffff9c
RBP: 0000564952433b10 R08: 0000000000000001 R09: 00007ffcff3c5080
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 0000564952434b20 R14: 0000000000000001 R15: 00005649524032c0
INFO: task syz-executor.2:21759 blocked for more than 143 seconds.
Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28520 pid:21759 ppid: 3638 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0xa00/0x4b50 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6589
__mutex_lock_common kernel/locking/mutex.c:679 [inline]
__mutex_lock+0xa70/0x1350 kernel/locking/mutex.c:747
blkdev_put+0xbc/0x770 block/bdev.c:912
blkdev_close+0x64/0x80 block/fops.c:495
__fput+0x277/0x9d0 fs/file_table.c:317
task_work_run+0xdd/0x1a0 kernel/task_work.c:177
get_signal+0x1c5/0x2600 kernel/signal.c:2634
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+0x46/0xb0
RIP: 0033:0x7f554be89109
RSP: 002b:00007f554cfea168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f554bf9bf60 RCX: 00007f554be89109
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000005
RBP: 00007f554bee305d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd6a25b50f R14: 00007f554cfea300 R15: 0000000000022000
Showing all locks held in the system:
2 locks held by pr/ttyS0/16:
1 lock held by khungtaskd/29:
#0: ffffffff8bd840a0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6491
2 locks held by getty/3295:
#0: ffff888021a60098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:244
#1: ffffc90001c382e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xe50/0x13c0 drivers/tty/n_tty.c:2124
2 locks held by kworker/u4:14/4744:
1 lock held by udevd/7266:
#0: ffff88801e1c9118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev.part.0+0x9b/0xb90 block/bdev.c:814
1 lock held by syz-executor.2/21759:
#0: ffff88801e1c9118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xbc/0x770 block/bdev.c:912
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #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+0x1e6/0x230 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xc22/0xf90 kernel/hung_task.c:378
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 16 Comm: pr/ttyS0 Not tainted 5.19.0-rc3-syzkaller-00146-g92f20ff72066 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:io_serial_in+0x83/0xa0 drivers/tty/serial/8250/8250_port.c:461
Code: 1f 1a fd 48 8d 7d 40 44 89 e1 48 b8 00 00 00 00 00 fc ff df 48 89 fa d3 e3 48 c1 ea 03 80 3c 02 00 75 16 66 03 5d 40 89 da ec <5b> 0f b6 c0 5d 41 5c c3 e8 00 45 66 fd eb a6 e8 29 45 66 fd eb e3
RSP: 0018:ffffc9000036fb10 EFLAGS: 00000002
RAX: dffffc0000000000 RBX: 00000000000003fd RCX: 0000000000000000
RDX: 00000000000003fd RSI: ffffffff845f868c RDI: ffffffff91223b00
RBP: ffffffff91223ac0 R08: 0000000000000001 R09: 000000000000001f
R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000
R13: fffffbfff22447ac R14: fffffbfff2244762 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffabf78e000 CR3: 000000007e78d000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
serial_in drivers/tty/serial/8250/8250.h:118 [inline]
wait_for_lsr+0x96/0xf0 drivers/tty/serial/8250/8250_port.c:2087
serial8250_console_fifo_write drivers/tty/serial/8250/8250_port.c:3356 [inline]
serial8250_console_write+0xc87/0xfe0 drivers/tty/serial/8250/8250_port.c:3438
call_console_driver kernel/printk/printk.c:2078 [inline]
__console_emit_next_record+0x896/0xa60 kernel/printk/printk.c:2919
console_emit_next_record kernel/printk/printk.c:3724 [inline]
printk_kthread_func.cold+0x702/0x73d kernel/printk/printk.c:3843
kthread+0x2e9/0x3a0 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:302
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 1a fd sbb %ch,%bh
2: 48 8d 7d 40 lea 0x40(%rbp),%rdi
6: 44 89 e1 mov %r12d,%ecx
9: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
10: fc ff df
13: 48 89 fa mov %rdi,%rdx
16: d3 e3 shl %cl,%ebx
18: 48 c1 ea 03 shr $0x3,%rdx
1c: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1)
20: 75 16 jne 0x38
22: 66 03 5d 40 add 0x40(%rbp),%bx
26: 89 da mov %ebx,%edx
28: ec in (%dx),%al
* 29: 5b pop %rbx <-- trapping instruction
2a: 0f b6 c0 movzbl %al,%eax
2d: 5d pop %rbp
2e: 41 5c pop %r12
30: c3 retq
31: e8 00 45 66 fd callq 0xfd664536
36: eb a6 jmp 0xffffffde
38: e8 29 45 66 fd callq 0xfd664566
3d: eb e3 jmp 0x22