INFO: task syz-executor168:4244 blocked for more than 143 seconds.
Not tainted 6.1.70-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor168 state:D stack:0 pid:4244 ppid:4243 flags:0x00000005
Call trace:
__switch_to+0x320/0x754 arch/arm64/kernel/process.c:553
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0xee4/0x1c98 kernel/sched/core.c:6558
schedule+0xc4/0x170 kernel/sched/core.c:6634
io_schedule+0x8c/0x188 kernel/sched/core.c:8786
bit_wait_io+0x1c/0xac kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0xcc/0x1e8 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0x194/0x21c kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer+0x78/0xac fs/buffer.c:69
lock_buffer include/linux/buffer_head.h:397 [inline]
ext4_quota_write+0x36c/0x54c fs/ext4/super.c:7150
qtree_write_dquot+0x1dc/0x488 fs/quota/quota_tree.c:431
v2_write_dquot+0xf4/0x188 fs/quota/quota_v2.c:358
dquot_commit+0x14c/0x240 fs/quota/dquot.c:512
ext4_write_dquot+0x1b0/0x284 fs/ext4/super.c:6753
ext4_mark_dquot_dirty+0xe8/0x140 fs/ext4/super.c:6801
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:410 [inline]
dquot_alloc_inode+0x594/0xb64 fs/quota/dquot.c:1838
ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:883 [inline]
ext4_xattr_set_entry+0x958/0x3064 fs/ext4/xattr.c:1665
ext4_xattr_block_set+0x54c/0x2c64 fs/ext4/xattr.c:1920
ext4_xattr_set_handle+0xae8/0x1294 fs/ext4/xattr.c:2406
ext4_xattr_set+0x1dc/0x350 fs/ext4/xattr.c:2508
ext4_xattr_user_set+0xd4/0xfc fs/ext4/xattr_user.c:41
__vfs_setxattr+0x388/0x3a4 fs/xattr.c:182
__vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:216
__vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277
vfs_setxattr+0x1a8/0x344 fs/xattr.c:309
do_setxattr fs/xattr.c:594 [inline]
setxattr+0x230/0x294 fs/xattr.c:617
path_setxattr+0x17c/0x258 fs/xattr.c:636
__do_sys_setxattr fs/xattr.c:652 [inline]
__se_sys_setxattr fs/xattr.c:648 [inline]
__arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648
__invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:206
el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637
el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffff8000159f4ef0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by rcu_tasks_trace/13:
#0: ffff8000159f56f0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:516
1 lock held by khungtaskd/28:
#0: ffff8000159f4d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:305
2 locks held by getty/3990:
#0: ffff0000d62ab098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x3c/0x4c drivers/tty/tty_ldsem.c:340
#1: ffff80001bca02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1214 drivers/tty/n_tty.c:2188
6 locks held by syz-executor168/4244:
#0: ffff0000d8066460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:393
#1: ffff0000df362c20 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
#1: ffff0000df362c20 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x17c/0x344 fs/xattr.c:308
#2: ffff0000df3628e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff0000df3628e8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x1e0/0x1294 fs/ext4/xattr.c:2321
#3: ffff800015b26388 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x10/0x4c include/linux/rcupdate.h:305
#4: ffff0000e28c80a8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x54/0x240 fs/quota/dquot.c:505
#5: ffff0000d8066208 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x84/0x188 fs/quota/quota_v2.c:356
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