INFO: task syz-executor.5:9862 blocked for more than 149 seconds.
Not tainted 5.15.112-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5 state:D stack:24792 pid: 9862 ppid: 3531 flags:0x00004004
Call Trace:
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_timeout+0xac/0x300 kernel/time/timer.c:1860
do_wait_for_common+0x2d9/0x480 kernel/sched/completion.c:85
__wait_for_common kernel/sched/completion.c:106 [inline]
wait_for_common kernel/sched/completion.c:117 [inline]
wait_for_completion+0x48/0x60 kernel/sched/completion.c:138
kthread_stop+0x178/0x580 kernel/kthread.c:649
ext4_stop_mmpd+0x43/0xb0 fs/ext4/mmp.c:255
ext4_fill_super+0x6c23/0x9f70 fs/ext4/super.c:5074
mount_bdev+0x26d/0x3a0 fs/super.c:1378
legacy_get_tree+0xeb/0x180 fs/fs_context.c:610
vfs_get_tree+0x88/0x270 fs/super.c:1508
do_new_mount+0x28b/0xad0 fs/namespace.c:2994
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
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: 0033:0x7f2b3dd5469a
RSP: 002b:00007f2b3c2c4f88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00000000000004c0 RCX: 00007f2b3dd5469a
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f2b3c2c4fe0
RBP: 00007f2b3c2c5020 R08: 00007f2b3c2c5020 R09: 0000000000218002
R10: 0000000000218002 R11: 0000000000000202 R12: 0000000020000000
R13: 0000000020000100 R14: 00007f2b3c2c4fe0 R15: 0000000020000240
Showing all locks held in the system:
1 lock held by khungtaskd/27:
#0: ffffffff8c91c5a0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by kworker/u4:3/967:
1 lock held by udevd/2961:
#0: ffff88801b5a1918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
2 locks held by getty/3258:
#0: ffff888024a7c098 (&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 syz-executor.4/3521:
#0: ffff88801b5a1918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817
2 locks held by syz-executor.3/3534:
#0: ffff88801b58d118 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
#1: ffff88801b582468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa9/0xbe0 drivers/block/loop.c:1365
1 lock held by syz-executor.5/9862:
#0: ffff88807962a0e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
2 locks held by syz-executor.0/11482:
#0: ffff88801b5a1918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912
#1: ffff88801b585468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 27 Comm: khungtaskd Not tainted 5.15.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
__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
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 3534 Comm: syz-executor.3 Not tainted 5.15.112-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
RIP: 0010:PageMemcgKmem include/linux/memcontrol.h:536 [inline]
RIP: 0010:page_memcg include/linux/memcontrol.h:451 [inline]
RIP: 0010:__mod_lruvec_page_state+0xf6/0x340 mm/memcontrol.c:779
Code: 0c 01 48 c7 c7 80 cb 95 8a be ba 02 00 00 48 c7 c2 c0 cb 95 8a e8 aa f5 94 ff 48 8d 5d 38 48 89 d8 48 c1 e8 03 42 80 3c 28 00 <74> 08 48 89 df e8 f0 7f fb ff 48 8b 03 48 89 ef a8 01 0f 85 13 02
RSP: 0018:ffffc90002ecf668 EFLAGS: 00000046
RAX: 1ffffd400027ff87 RBX: ffffea00013ffc38 RCX: ffff888021e65940
RDX: dffffc0000000000 RSI: ffffffff8ad85d20 RDI: ffffffff8ad85ce0
RBP: ffffea00013ffc00 R08: dffffc0000000000 R09: fffffbfff1f79021
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88813fffb000
R13: dffffc0000000000 R14: 0000000000000013 R15: 00000000ffffffff
FS: 00005555574e1400(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f13a2903218 CR3: 000000001d220000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
unaccount_page_cache_page+0x2a3/0x8b0 mm/filemap.c:196
__delete_from_page_cache+0xd1/0x860 mm/filemap.c:231
delete_from_page_cache+0x126/0x190 mm/filemap.c:266
truncate_inode_page+0x8d/0xb0 mm/truncate.c:219
shmem_undo_range+0x535/0x1b50 mm/shmem.c:960
shmem_truncate_range mm/shmem.c:1063 [inline]
shmem_evict_inode+0x21b/0xa00 mm/shmem.c:1145
evict+0x2a4/0x620 fs/inode.c:587
__dentry_kill+0x436/0x650 fs/dcache.c:582
dentry_kill+0xbb/0x290
dput+0x1f1/0x420 fs/dcache.c:888
__fput+0x5ec/0x890 fs/file_table.c:288
task_work_run+0x129/0x1a0 kernel/task_work.c:164
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x106/0x130 kernel/entry/common.c:175
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: 0033:0x7f3ce3c415d7
Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc9fffda78 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007f3ce3c415d7
RDX: 00007ffc9fffdb49 RSI: 000000000000000a RDI: 00007ffc9fffdb40
RBP: 00007ffc9fffdb40 R08: 00000000ffffffff R09: 00007ffc9fffd910
R10: 00005555574e2873 R11: 0000000000000246 R12: 00007f3ce3c9acdc
R13: 00007ffc9fffec00 R14: 00005555574e2810 R15: 00007ffc9fffec40