INFO: task syz-executor.2:25618 blocked for more than 143 seconds.
Not tainted 6.7.0-rc7-syzkaller-00016-gf5837722ffec #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:24024 pid:25618 tgid:25582 ppid:24346 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0x1961/0x4ab0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6778
io_schedule+0x8c/0x100 kernel/sched/core.c:8998
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:404 [inline]
ext4_quota_write+0x37c/0x580 fs/ext4/super.c:7251
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:6877
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+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f9de667cce9
RSP: 002b:00007f9de73340c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f9de679c050 RCX: 00007f9de667cce9
RDX: 0000000020000380 RSI: 0000000020000340 RDI: 00000000200002c0
RBP: 00007f9de66c947a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffed R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f9de679c050 R15: 00007fffcc037838
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8d92dae0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by kworker/u4:8/2456:
#0: ffff888012c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#0: ffff888012c71938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
#1: ffffc9000b197d20 ((quota_release_work).work){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2602 [inline]
#1: ffffc9000b197d20 ((quota_release_work).work){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2700
2 locks held by getty/4809:
#0: ffff8880262a60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900015b72f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by kworker/u4:3/18468:
1 lock held by syz-executor.5/24353:
#0: ffff8880a2e360e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock fs/super.c:56 [inline]
#0: ffff8880a2e360e0 (&type->s_umount_key#31){++++}-{3:3}, at: __super_lock_excl fs/super.c:71 [inline]
#0: ffff8880a2e360e0 (&type->s_umount_key#31){++++}-{3:3}, at: deactivate_super+0xad/0xf0 fs/super.c:516
6 locks held by syz-executor.2/25618:
#0: ffff88802af22418 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:404
#1: ffff88808acb0e00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff88808acb0e00 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x1e1/0x420 fs/xattr.c:321
#2: ffff88808acb0ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff88808acb0ac8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x277/0x1570 fs/ext4/xattr.c:2371
#3: ffffffff8da82710 (dquot_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline]
#3: ffffffff8da82710 (dquot_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline]
#3: ffffffff8da82710 (dquot_srcu){.+.+}-{0:0}, at: dquot_alloc_inode+0x1ab/0xb70 fs/quota/dquot.c:1758
#4: ffff88803b4ede68 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5b/0x520 fs/quota/dquot.c:505
#5: ffff88802af22210 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x90/0x190 fs/quota/quota_v2.c:356
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.7.0-rc7-syzkaller-00016-gf5837722ffec #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: 19191 Comm: syz-executor.5 Not tainted 6.7.0-rc7-syzkaller-00016-gf5837722ffec #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__io_cqring_events io_uring/io_uring.c:202 [inline]
RIP: 0010:io_cqe_cache_refill+0xe6/0x230 io_uring/io_uring.c:865
Code: 48 83 e5 01 0f 85 db 00 00 00 e8 85 1d 15 fd 44 8d 63 ff 45 21 ec 48 8b 04 24 48 8d 68 08 48 89 e8 48 c1 e8 03 42 0f b6 04 38 <84> c0 0f 85 00 01 00 00 44 2b 6d 00 31 c0 89 d9 44 29 e9 0f 42 c8
RSP: 0018:ffffc9001ade7ad0 EFLAGS: 00000a02
RAX: 0000000000000000 RBX: 0000000000008000 RCX: 0000000000040000
RDX: ffffc90018a81000 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffff888098500008 R08: ffffffff847a7dd3 R09: fffff520035bcf5c
R10: dffffc0000000000 R11: fffff520035bcf5c R12: 0000000000000000
R13: 0000000000000000 R14: ffff888039308000 R15: dffffc0000000000
FS: 00007f63009546c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c01593f000 CR3: 0000000077753000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
io_get_cqe_overflow+0x3ed/0x590 io_uring/io_uring.h:135
__io_cqring_overflow_flush+0x1fa/0x600 io_uring/io_uring.c:718
io_cqring_do_overflow_flush io_uring/io_uring.c:739 [inline]
io_cqring_wait io_uring/io_uring.c:2651 [inline]
__do_sys_io_uring_enter io_uring/io_uring.c:3757 [inline]
__se_sys_io_uring_enter+0x1f3e/0x2b30 io_uring/io_uring.c:3647
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x45/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f62ffc7cce9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f63009540c8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: ffffffffffffffda RBX: 00007f62ffd9bf80 RCX: 00007f62ffc7cce9
RDX: 0000000000400000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 00007f62ffcc947a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f62ffd9bf80 R15: 00007fff1d8d01b8