syzbot

INFO: task syz-executor239:5313 blocked for more than 143 seconds.
      Not tainted 6.12.0-rc5-syzkaller-00308-g3e5e6c9900c3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor239 state:D stack:23920 pid:5313  tgid:5313  ppid:5312   flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5328 [inline]
 __schedule+0x18af/0x4bd0 kernel/sched/core.c:6690
 __schedule_loop kernel/sched/core.c:6767 [inline]
 schedule+0x14b/0x320 kernel/sched/core.c:6782
 xlog_grant_head_wait+0x43b/0xa90 fs/xfs/xfs_log.c:266
 xlog_grant_head_check+0x342/0x4f0
 xfs_log_reserve+0x337/0x8e0 fs/xfs/xfs_log.c:436
 xfs_trans_reserve+0x20a/0x640 fs/xfs/xfs_trans.c:195
 xfs_trans_alloc+0x40e/0x830 fs/xfs/xfs_trans.c:284
 xfs_trans_alloc_inode+0x1ac/0x5d0 fs/xfs/xfs_trans.c:1077
 xfs_attr_set+0x8a8/0x1420 fs/xfs/libxfs/xfs_attr.c:1097
 xfs_xattr_set+0x1ff/0x350 fs/xfs/xfs_xattr.c:187
 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
 vfs_setxattr+0x221/0x430 fs/xattr.c:321
 do_setxattr fs/xattr.c:629 [inline]
 path_setxattr+0x37e/0x4d0 fs/xattr.c:658
 __do_sys_setxattr fs/xattr.c:676 [inline]
 __se_sys_setxattr fs/xattr.c:672 [inline]
 __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:672
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe065674a99
RSP: 002b:00007fff489de4a8 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007fe065674a99
RDX: 0000000020000180 RSI: 0000000020000040 RDI: 00000000200000c0
RBP: 00007fe0656f35f0 R08: 0000000000000000 R09: 000055557bbf54c0
R10: 000000000000feeb R11: 0000000000000246 R12: 00007fff489de4d0
R13: 00007fff489de6f8 R14: 431bde82d7b634db R15: 00007fe0656bd03b
 </TASK>

Showing all locks held in the system:
1 lock held by khungtaskd/25:
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline]
 #0: ffffffff8e937da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6720
2 locks held by getty/5113:
 #0: ffff88801e5510a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
 #1: ffffc9000039b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6a6/0x1e00 drivers/tty/n_tty.c:2211
3 locks held by syz-executor239/5313:
 #0: ffff888043bc2420 (sb_writers#9){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:515
 #1: ffff88804538da70 (&inode->i_sb->s_type->i_mutex_dir_key){++++}-{3:3}, at: inode_lock include/linux/fs.h:815 [inline]
 #1: ffff88804538da70 (&inode->i_sb->s_type->i_mutex_dir_key){++++}-{3:3}, at: vfs_setxattr+0x1e1/0x430 fs/xattr.c:320
 #2: ffff888043bc2610 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_inode+0x1ac/0x5d0 fs/xfs/xfs_trans.c:1077

=============================================

NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 25 Comm: khungtaskd Not tainted 6.12.0-rc5-syzkaller-00308-g3e5e6c9900c3 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
 nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
 watchdog+0xff4/0x1040 kernel/hung_task.c:379
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>