INFO: task syz-executor.1:5244 blocked for more than 143 seconds.
Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26192 pid:5244 tgid:5221 ppid:5110 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5376 [inline]
__schedule+0xedb/0x5af0 kernel/sched/core.c:6688
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
io_schedule+0xbe/0x130 kernel/sched/core.c:8998
bit_wait_io+0x16/0xe0 kernel/sched/wait_bit.c:209
__wait_on_bit_lock+0x112/0x1a0 kernel/sched/wait_bit.c:90
out_of_line_wait_on_bit_lock+0xdb/0x110 kernel/sched/wait_bit.c:117
wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline]
__lock_buffer+0x67/0x70 fs/buffer.c:71
lock_buffer include/linux/buffer_head.h:404 [inline]
ext4_quota_write+0x573/0x650 fs/ext4/super.c:7251
qtree_write_dquot+0x268/0x570 fs/quota/quota_tree.c:431
v2_write_dquot+0x1d6/0x250 fs/quota/quota_v2.c:358
dquot_commit+0x36d/0x590 fs/quota/dquot.c:512
ext4_write_dquot+0x259/0x320 fs/ext4/super.c:6877
ext4_mark_dquot_dirty fs/ext4/super.c:6925 [inline]
ext4_mark_dquot_dirty+0x113/0x1b0 fs/ext4/super.c:6919
mark_dquot_dirty fs/quota/dquot.c:372 [inline]
mark_all_dquot_dirty fs/quota/dquot.c:410 [inline]
dquot_alloc_inode+0x35c/0x730 fs/quota/dquot.c:1780
ext4_xattr_inode_alloc_quota fs/ext4/xattr.c:932 [inline]
ext4_xattr_set_entry+0xa25/0x3ce0 fs/ext4/xattr.c:1715
ext4_xattr_block_set+0x678/0x3180 fs/ext4/xattr.c:1970
ext4_xattr_set_handle+0xd70/0x1420 fs/ext4/xattr.c:2456
ext4_xattr_set+0x149/0x370 fs/ext4/xattr.c:2558
ext4_xattr_user_set+0xb9/0xf0 fs/ext4/xattr_user.c:41
__vfs_setxattr+0x173/0x1d0 fs/xattr.c:201
__vfs_setxattr_noperm+0x127/0x5e0 fs/xattr.c:235
__vfs_setxattr_locked+0x17e/0x250 fs/xattr.c:296
vfs_setxattr+0x146/0x350 fs/xattr.c:322
do_setxattr+0x142/0x170 fs/xattr.c:630
setxattr+0x159/0x170 fs/xattr.c:653
path_setxattr+0x175/0x1d0 fs/xattr.c:672
__do_sys_setxattr fs/xattr.c:688 [inline]
__se_sys_setxattr fs/xattr.c:684 [inline]
__x64_sys_setxattr+0xc4/0x160 fs/xattr.c:684
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fdc39e7cce9
RSP: 002b:00007fdc3ab8c0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007fdc39f9c050 RCX: 00007fdc39e7cce9
RDX: 0000000020000380 RSI: 0000000020000340 RDI: 00000000200002c0
RBP: 00007fdc39ec947a R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffed R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fdc39f9c050 R15: 00007ffecabe4178
Showing all locks held in the system:
1 lock held by khungtaskd/28:
#0: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
#0: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
#0: ffffffff8cfa7d60 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4820:
#0: ffff88814c1000a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc900020682f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc6/0x1490 drivers/tty/n_tty.c:2201
3 locks held by kworker/u4:2/14635:
6 locks held by syz-executor.1/5244:
#0: ffff88805925c418 (sb_writers#5){.+.+}-{0:0}, at: path_setxattr+0xc3/0x1d0 fs/xattr.c:670
#1: ffff88806e994880 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: inode_lock include/linux/fs.h:802 [inline]
#1: ffff88806e994880 (&type->i_mutex_dir_key#3){++++}-{3:3}, at: vfs_setxattr+0x123/0x350 fs/xattr.c:321
#2: ffff88806e994548 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline]
#2: ffff88806e994548 (&ei->xattr_sem){++++}-{3:3}, at: ext4_xattr_set_handle+0x159/0x1420 fs/ext4/xattr.c:2371
#3: ffffffff8d1be2b0 (dquot_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline]
#3: ffffffff8d1be2b0 (dquot_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline]
#3: ffffffff8d1be2b0 (dquot_srcu){.+.+}-{0:0}, at: dquot_alloc_inode+0x20b/0x730 fs/quota/dquot.c:1758
#4: ffff8880ab0cdea8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x51/0x590 fs/quota/dquot.c:505
#5: ffff88805925c210 (&s->s_dquot.dqio_sem){++++}-{3:3}, at: v2_write_dquot+0x14b/0x250 fs/quota/quota_v2.c:356
2 locks held by syz-executor.5/6940:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #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+0xd9/0x1b0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x277/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x299/0x300 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+0xf87/0x1210 kernel/hung_task.c:379
kthread+0x2c6/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 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: 4496 Comm: syslogd Not tainted 6.7.0-rc7-syzkaller-00003-gfbafc3e621c3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:__schedule+0x55c/0x5af0 kernel/sched/core.c:6680
Code: 80 3c 02 00 0f 85 cb 53 00 00 48 8b 95 b0 fe ff ff 4d 89 af 58 0a 00 00 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 <0f> 85 b6 53 00 00 48 8b 85 b0 fe ff ff 4d 8d a7 58 0b 00 00 4c 89
RSP: 0018:ffffc9000341f698 EFLAGS: 00000046
RAX: dffffc0000000000 RBX: ffff88807d47c180 RCX: ffffffff8a811f0b
RDX: 1ffff1100fa8f919 RSI: 0000000000000008 RDI: ffff8880b983c7d0
RBP: ffffc9000341f828 R08: 0000000000000001 R09: ffffed100fa8f830
R10: ffff88807d47c187 R11: 0000000000000000 R12: ffffffff8ca64368
R13: ffff88807cd72100 R14: ffff88807d47c410 R15: ffff8880b983c740
FS: 00007ff32cc68380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c029931000 CR3: 000000007d61c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__schedule_loop kernel/sched/core.c:6763 [inline]
schedule+0xe9/0x270 kernel/sched/core.c:6778
schedule_timeout+0x257/0x290 kernel/time/timer.c:2143
__skb_wait_for_more_packets+0x360/0x5e0 net/core/datagram.c:121
__unix_dgram_recvmsg+0x243/0xee0 net/unix/af_unix.c:2396
unix_dgram_recvmsg+0xc3/0xf0 net/unix/af_unix.c:2485
sock_recvmsg_nosec net/socket.c:1044 [inline]
sock_recvmsg+0xe2/0x170 net/socket.c:1066
sock_read_iter+0x2c3/0x3c0 net/socket.c:1136
call_read_iter include/linux/fs.h:2014 [inline]
new_sync_read fs/read_write.c:389 [inline]
vfs_read+0x7c5/0x8f0 fs/read_write.c:470
ksys_read+0x1f0/0x250 fs/read_write.c:613
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7ff32cdbcb6a
Code: 00 3d 00 00 41 00 75 0d 50 48 8d 3d 2d 08 0a 00 e8 ea 7d 01 00 31 c0 e9 07 ff ff ff 64 8b 04 25 18 00 00 00 85 c0 75 1b 0f 05 <48> 3d 00 f0 ff ff 76 6c 48 8b 15 8f a2 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007ffda3d4f268 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 00007ff32cdbcb6a
RDX: 00000000000000ff RSI: 00005611d4165300 RDI: 0000000000000000
RBP: 00005611d41652c0 R08: 0000000000000001 R09: 0000000000000000
R10: 00007ff32cf5b3a3 R11: 0000000000000246 R12: 00005611d4165348
R13: 00005611d4165300 R14: 0000000000000000 R15: 00007ff32cf99a80