syzbot

INFO: task syz-executor290:3998 blocked for more than 143 seconds.
      Not tainted 5.15.112-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor290 state:D stack:    0 pid: 3998 ppid:  3997 flags:0x00000001
Call trace:
 __switch_to+0x308/0x5e8 arch/arm64/kernel/process.c:518
 context_switch kernel/sched/core.c:5026 [inline]
 __schedule+0xf10/0x1e38 kernel/sched/core.c:6372
 schedule+0x11c/0x1c8 kernel/sched/core.c:6455
 xlog_grant_head_wait+0x390/0xa88 fs/xfs/xfs_log.c:256
 xlog_grant_head_check+0x218/0x3d8
 xfs_log_reserve+0x384/0xc1c fs/xfs/xfs_log.c:464
 xfs_trans_reserve+0x1e8/0x5a4 fs/xfs/xfs_trans.c:197
 xfs_trans_alloc+0x4c4/0xaa4 fs/xfs/xfs_trans.c:288
 xfs_trans_alloc_icreate+0xc8/0x290 fs/xfs/xfs_trans.c:1102
 xfs_create+0x578/0xfec fs/xfs/xfs_inode.c:1018
 xfs_generic_create+0x390/0xb70 fs/xfs/xfs_iops.c:197
 xfs_vn_create+0x44/0x58 fs/xfs/xfs_iops.c:275
 lookup_open fs/namei.c:3392 [inline]
 open_last_lookups fs/namei.c:3462 [inline]
 path_openat+0xec0/0x26f0 fs/namei.c:3669
 do_filp_open+0x1a8/0x3b4 fs/namei.c:3699
 do_sys_openat2+0x128/0x3d8 fs/open.c:1211
 do_sys_open fs/open.c:1227 [inline]
 __do_sys_openat fs/open.c:1243 [inline]
 __se_sys_openat fs/open.c:1238 [inline]
 __arm64_sys_openat+0x1f0/0x240 fs/open.c:1238
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

Showing all locks held in the system:
1 lock held by khungtaskd/27:
 #0: ffff800014aa19e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:268
2 locks held by getty/3719:
 #0: ffff0000d04dd098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x40/0x50 drivers/tty/tty_ldsem.c:340
 #1: ffff80001a27b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x414/0x1200 drivers/tty/n_tty.c:2147
3 locks held by syz-executor290/3998:
 #0: ffff0000ca2a8460 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:377
 #1: ffff0000e04b8300 (&inode->i_sb->s_type->i_mutex_dir_key){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff0000e04b8300 (&inode->i_sb->s_type->i_mutex_dir_key){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3459 [inline]
 #1: ffff0000e04b8300 (&inode->i_sb->s_type->i_mutex_dir_key){+.+.}-{3:3}, at: path_openat+0x63c/0x26f0 fs/namei.c:3669
 #2: ffff0000ca2a8650 (sb_internal#2){.+.+}-{0:0}, at: xfs_trans_alloc_icreate+0xc8/0x290 fs/xfs/xfs_trans.c:1102

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