[v5.15] INFO: task hung in read_part_sector

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 09996673e313 Linux 5.15.123
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11f27a61a80000
kernel config: https://syzkaller.appspot.com/x/.config?x=f9d4431ce682ac7e
dashboard link: https://syzkaller.appspot.com/bug?extid=05fa421648ffb4509cb8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e665cef1f596/disk-09996673.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c21eeab4b038/vmlinux-09996673.xz
kernel image: https://storage.googleapis.com/syzbot-assets/15e2b5a7aa32/bzImage-09996673.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+05fa42...@syzkaller.appspotmail.com

INFO: task udevd:15064 blocked for more than 143 seconds.
Not tainted 5.15.123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:udevd state:D stack:23872 pid:15064 ppid: 2961 flags:0x00004002
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
io_schedule+0x88/0x100 kernel/sched/core.c:8472
wait_on_page_bit_common+0xa13/0x1180 mm/filemap.c:1356
wait_on_page_bit mm/filemap.c:1417 [inline]
wait_on_page_locked include/linux/pagemap.h:688 [inline]
wait_on_page_read mm/filemap.c:3428 [inline]
do_read_cache_page+0x9c1/0x1040 mm/filemap.c:3471
read_mapping_page include/linux/pagemap.h:515 [inline]
read_part_sector+0xd8/0x530 block/partitions/core.c:727
adfspart_check_ICS+0xd9/0xd00 block/partitions/acorn.c:360
check_partition block/partitions/core.c:148 [inline]
blk_add_partitions block/partitions/core.c:612 [inline]
bdev_disk_changed+0x982/0x1760 block/partitions/core.c:698
blkdev_get_whole+0x2fb/0x390 block/bdev.c:682
blkdev_get_by_dev+0x2b2/0xa50 block/bdev.c:824
blkdev_open+0x138/0x2d0 block/fops.c:463
do_dentry_open+0x807/0xfb0 fs/open.c:826
do_open fs/namei.c:3538 [inline]
path_openat+0x2702/0x2f20 fs/namei.c:3672
do_filp_open+0x21c/0x460 fs/namei.c:3699
do_sys_openat2+0x13b/0x500 fs/open.c:1211
do_sys_open fs/open.c:1227 [inline]
__do_sys_openat fs/open.c:1243 [inline]
__se_sys_openat fs/open.c:1238 [inline]
__x64_sys_openat+0x243/0x290 fs/open.c:1238
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f9bafbcd9a4
RSP: 002b:00007ffe24d95750 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000056270be04850 RCX: 00007f9bafbcd9a4
RDX: 00000000000a0800 RSI: 000056270bd2ac60 RDI: 00000000ffffff9c
RBP: 000056270bd2ac60 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800
R13: 000056270bd18750 R14: 0000000000000001 R15: 000056270bd06910
</TASK>
INFO: task syz-executor.2:15181 blocked for more than 143 seconds.
Not tainted 5.15.123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27520 pid:15181 ppid: 3556 flags:0x00004006
Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
__mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blkdev_put+0xfb/0x790 block/bdev.c:912
blkdev_close+0x7c/0xa0 block/fops.c:475
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
get_signal+0x143a/0x14e0 kernel/signal.c:2661
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fb264324b29
RSP: 002b:00007fb2628a60c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007fb264443f80 RCX: 00007fb264324b29
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007fb26437047a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fb264443f80 R15: 00007ffeacca8a18
</TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/26:
#0: ffffffff8c91e920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/3256:
#0: ffff888024b04098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc900020a32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
1 lock held by udevd/15064:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
1 lock held by syz-executor.2/15181:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
1 lock held by syz-executor.2/15318:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
1 lock held by syz-executor.2/15319:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
1 lock held by syz-executor.2/15363:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
1 lock held by syz-executor.2/15364:
#0: ffff88801b7f5118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817

=============================================

NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: khungtaskd Not tainted 5.15.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 32573 Comm: kworker/u4:1 Not tainted 5.15.123-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Workqueue: bat_events batadv_nc_worker
RIP: 0010:__lock_release kernel/locking/lockdep.c:5310 [inline]
RIP: 0010:lock_release+0x287/0x9a0 kernel/locking/lockdep.c:5642
Code: 8d 5f 24 48 89 d8 48 c1 e8 03 49 be 00 00 00 00 00 fc ff df 42 0f b6 04 30 84 c0 0f 85 00 05 00 00 83 3b 00 0f 85 19 04 00 00 <4d> 8d 67 20 4c 89 e3 48 c1 eb 03 42 0f b6 04 33 84 c0 48 8b 34 24
RSP: 0018:ffffc900012bfa40 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88807ba62924 RCX: ffffc900012bfa03
RDX: 0000000000000002 RSI: ffffffff8c91e920 RDI: ffff88807ba62900
RBP: ffffc900012bfb80 R08: dffffc0000000000 R09: fffffbfff1bc7f0e
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000002
R13: 000000000000000a R14: dffffc0000000000 R15: ffff88807ba62900
FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0117db000 CR3: 0000000023846000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<NMI>
</NMI>
<TASK>
rcu_read_unlock include/linux/rcupdate.h:729 [inline]
batadv_nc_process_nc_paths+0x2c2/0x350 net/batman-adv/network-coding.c:703
batadv_nc_worker+0x3d4/0x5b0 net/batman-adv/network-coding.c:732
process_one_work+0x8a1/0x10c0 kernel/workqueue.c:2310
worker_thread+0xaca/0x1280 kernel/workqueue.c:2457
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>


---
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If the bug is already fixed, let syzbot know by replying with:
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If you want to change bug's subsystems, reply with:
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If the bug is a duplicate of another bug, reply with:
#syz dup: exact-subject-of-another-report

If you want to undo deduplication, reply with:
#syz undup

[syzbot]

syzbot has found a reproducer for the following issue on:

HEAD commit: 09996673e313 Linux 5.15.123
git tree: linux-5.15.y

console output: https://syzkaller.appspot.com/x/log.txt?x=119bfef6a80000

kernel config: https://syzkaller.appspot.com/x/.config?x=f9d4431ce682ac7e
dashboard link: https://syzkaller.appspot.com/bug?extid=05fa421648ffb4509cb8
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15f60216a80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16617936a80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e665cef1f596/disk-09996673.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c21eeab4b038/vmlinux-09996673.xz
kernel image: https://storage.googleapis.com/syzbot-assets/15e2b5a7aa32/bzImage-09996673.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+05fa42...@syzkaller.appspotmail.com

INFO: task udevd:3532 blocked for more than 143 seconds.

Not tainted 5.15.123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

task:udevd state:D stack:24512 pid: 3532 ppid: 2962 flags:0x00004006

Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455

RIP: 0033:0x7f29cc2219a4
RSP: 002b:00007ffe87d4fc90 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 000056126420a2c0 RCX: 00007f29cc2219a4
RDX: 00000000000a0800 RSI: 000056126420a710 RDI: 00000000ffffff9c
RBP: 000056126420a710 R08: 0000000000000001 R09: 0000000000000010

R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800

R13: 0000561264212af0 R14: 0000000000000001 R15: 0000561264209910
</TASK>
INFO: task syz-executor541:3543 blocked for more than 143 seconds.

Not tainted 5.15.123-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.

task:syz-executor541 state:D stack:25600 pid: 3543 ppid: 3528 flags:0x00004006

Call Trace:
<TASK>
context_switch kernel/sched/core.c:5026 [inline]
__schedule+0x12c4/0x4590 kernel/sched/core.c:6372
schedule+0x11b/0x1f0 kernel/sched/core.c:6455
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6514
__mutex_lock_common+0xe34/0x25a0 kernel/locking/mutex.c:669
__mutex_lock kernel/locking/mutex.c:729 [inline]
mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
blkdev_put+0xfb/0x790 block/bdev.c:912
blkdev_close+0x7c/0xa0 block/fops.c:475
__fput+0x3bf/0x890 fs/file_table.c:280
task_work_run+0x129/0x1a0 kernel/task_work.c:164
get_signal+0x143a/0x14e0 kernel/signal.c:2661
arch_do_signal_or_restart+0xc3/0x1890 arch/x86/kernel/signal.c:865
handle_signal_work kernel/entry/common.c:148 [inline]
exit_to_user_mode_loop+0x97/0x130 kernel/entry/common.c:172
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:208
__syscall_exit_to_user_mode_work kernel/entry/common.c:290 [inline]
syscall_exit_to_user_mode+0x5d/0x250 kernel/entry/common.c:301
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x61/0xcb

RIP: 0033:0x7f9c25d3e7f9
RSP: 002b:00007f9c25cfc228 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f9c25dc63e8 RCX: 00007f9c25d3e7f9

RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003

RBP: 00007f9c25dc63e0 R08: 00007f9c25cfc6c0 R09: 00007f9c25cfc6c0
R10: 00007f9c25cfc6c0 R11: 0000000000000246 R12: 00007f9c25dc63ec
R13: 00007f9c25d931b4 R14: 64626e2f7665642f R15: 00007ffc8dac5118

</TASK>

Showing all locks held in the system:

1 lock held by khungtaskd/27:

#0: ffffffff8c91e920 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30

2 locks held by getty/3258:
#0: ffff8880240e8098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252
#1: ffffc90002bb32e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1da0 drivers/tty/n_tty.c:2147
1 lock held by udevd/3532:
#0: ffff88801b2d2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
1 lock held by syz-executor541/3543:
#0: ffff88801b2d2118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912

=============================================

NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.123-syzkaller #0

Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
watchdog+0xe72/0xeb0 kernel/hung_task.c:295
kthread+0x3f6/0x4f0 kernel/kthread.c:319
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
</TASK>

Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1 skipped: idling at native_safe_halt arch/x86/include/asm/irqflags.h:51 [inline]
NMI backtrace for cpu 1 skipped: idling at arch_safe_halt arch/x86/include/asm/irqflags.h:89 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt drivers/acpi/processor_idle.c:109 [inline]
NMI backtrace for cpu 1 skipped: idling at acpi_idle_do_entry+0x10f/0x340 drivers/acpi/processor_idle.c:570


---
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#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.