INFO: task syz-executor.2:10058 blocked for more than 143 seconds.
Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24760 pid:10058 tgid:10036 ppid:5099 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
io_schedule+0x8c/0x100 kernel/sched/core.c:9023
bit_wait_io+0x12/0xc0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xd1/0x530 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x1d4/0x250 kernel/sched/wait_bit.c:117
lock_buffer include/linux/buffer_head.h:401 [inline]
ext4_quota_write+0x37c/0x580 fs/ext4/super.c:7240
qtree_write_dquot+0x243/0x530 fs/quota/quota_tree.c:431
v2_write_dquot+0x120/0x190 fs/quota/quota_v2.c:358
dquot_commit+0x3c4/0x520 fs/quota/dquot.c:512
ext4_write_dquot+0x1f2/0x2c0 fs/ext4/super.c:6866
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:410 [inline]
dquot_alloc_inode+0x69f/0xb70 fs/quota/dquot.c:1780
ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:932 [inline]
ext4_xattr_set_entry+0xaf3/0x3fc0 fs/ext4/xattr.c:1715
ext4_xattr_block_set+0x6a2/0x35e0 fs/ext4/xattr.c:1970
ext4_xattr_set_handle+0xcdf/0x1570 fs/ext4/xattr.c:2456
ext4_xattr_set+0x241/0x3d0 fs/ext4/xattr.c:2558
__vfs_setxattr+0x460/0x4a0 fs/xattr.c:201
__vfs_setxattr_noperm+0x12e/0x5e0 fs/xattr.c:235
vfs_setxattr+0x221/0x420 fs/xattr.c:322
do_setxattr fs/xattr.c:630 [inline]
setxattr+0x25d/0x2f0 fs/xattr.c:653
path_setxattr+0x1c0/0x2a0 fs/xattr.c:672
__do_sys_setxattr fs/xattr.c:688 [inline]
__se_sys_setxattr fs/xattr.c:684 [inline]
__x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:684
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f93bac7cda9
RSP: 002b:00007f93bb98f0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f93badac120 RCX: 00007f93bac7cda9
RDX: 0000000020000200 RSI: 0000000020001480 RDI: 0000000020000000
RBP: 00007f93bacc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000f9d R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f93badac120 R15: 00007ffefe93af98
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:10/2415:
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888013089938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900091f7d20 ((quota_release_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900091f7d20 ((quota_release_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
2 locks held by getty/4812:
#0: ffff88802e9f20a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
6 locks held by syz-executor.2/10058:
#0: ffff888083200420 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88808cf0c000 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff88808cf0c000 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x1e1/0x420 fs/xattr.c:321
#2: ffff88808cf0bcc8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff88808cf0bcc8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x277/0x1570 fs/ext4/xattr.c:2371
#3: ffffffff8da86db0 (dquot_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline]
#3: ffffffff8da86db0 (dquot_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline]
#3: ffffffff8da86db0 (dquot_srcu){.+.+}-{0:0}, at: dquot_alloc_inode+0x1ab/0xb70 fs/quota/dquot.c:1758
#4: ffff8880699686a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5b/0x520 fs/quota/dquot.c:505
#5: ffff888083200210 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x90/0x190 fs/quota/quota_v2.c:356
1 lock held by syz-executor.0/13131:
#0: ffff888082d580e0 (&type->s_umount_key#26/1){+.+.}-{3:3}, at: alloc_super+0x20e/0x8f0 fs/super.c:345
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 4485 Comm: syslogd Not tainted 6.8.0-rc1-syzkaller-00356-g8a696a29c690 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:mark_lock+0x148/0x350 kernel/locking/lockdep.c:4697
Code: c3 60 48 89 d8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 df e8 6a e3 7d 00 41 bc 01 00 00 00 44 85 33 74 12 44 89 e0 48 83 c4 10 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 e8 58 41 ff ff 85 c0 0f 84 33 01
RSP: 0018:ffffc9000315f9b8 EFLAGS: 00000086
RAX: 0000000000000001 RBX: ffffffff90b22570 RCX: ffffffff816dfaea
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff90dfb480
RBP: 0000000000000006 R08: ffffffff90dfb487 R09: 1ffffffff21bf690
R10: dffffc0000000000 R11: fffffbfff21bf691 R12: 0000000000000001
R13: dffffc0000000000 R14: 0000000000000040 R15: ffff88807dd10ae8
FS: 00007f64478c2380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055ba827d4600 CR3: 0000000028dcb000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x116d/0x1fd0 kernel/locking/lockdep.c:5091
lock_acquire+0x1e3/0x530 kernel/locking/lockdep.c:5754
down_write+0x3a/0x50 kernel/locking/rwsem.c:1579
inode_lock include/linux/fs.h:802 [inline]
shmem_file_write_iter+0x83/0x120 mm/shmem.c:2883
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xca0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f6447a16bf2
Code: 89 c7 48 89 44 24 08 e8 7b 34 fa ff 48 8b 44 24 08 48 83 c4 28 c3 c3 64 8b 04 25 18 00 00 00 85 c0 75 20 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 76 6f 48 8b 15 07 a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffd2af28e58 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f6447a16bf2
RDX: 000000000000009a RSI: 0000555c4cfc5c50 RDI: 0000000000000003
RBP: 0000555c4cfc5c50 R08: 0000000000000001 R09: 0000000000000000
R10: 00007f6447bb53a3 R11: 0000000000000246 R12: 000000000000009a
R13: 00007f64478c2300 R14: 0000000000000004 R15: 0000555c4cfc5a60