EXT4-fs (loop0): This should not happen!! Data will be lost
EXT4-fs warning (device loop0): ext4_dirblock_csum_set:396: inode #2: comm syz.0.17: No space for directory leaf checksum. Please run e2fsck -D.
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WARNING: CPU: 0 PID: 6756 at fs/ext4/ext4.h:2898 ext4_update_dx_flag+0x14c/0x1b0 fs/ext4/ext4.h:2898
Modules linked in:
CPU: 0 UID: 0 PID: 6756 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/30/2025
pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
pc : ext4_update_dx_flag+0x14c/0x1b0 fs/ext4/ext4.h:2898
lr : ext4_update_dx_flag+0x14c/0x1b0 fs/ext4/ext4.h:2898
sp : ffff80009bf376c0
x29: ffff80009bf376d0 x28: dfff800000000000 x27: ffff7000137e6ee4
x26: ffff0000dff13c6c x25: ffff80009bf37740 x24: ffff0000dff13bf8
x23: 0000000000000001 x22: 000000000008d200 x21: dfff800000000000
x20: 00000000ffeffffe x19: ffff0000dff139b0 x18: 00000000ffffffff
x17: ffff8000918dd000 x16: ffff80008a4fae44 x15: ffff7000137e6ecc
x14: 1ffff000137e6ecc x13: 0000000000000004 x12: ffffffffffffffff
x11: ffff7000137e6ecc x10: 0000000000ff0100 x9 : 0000000000000000
x8 : ffff0000c894bd80 x7 : ffff80008060a5c8 x6 : 0000000000000000
x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff800080dbd50c
x2 : 0000000000000001 x1 : 0000000000000400 x0 : 0000000000000000
Call trace:
 ext4_update_dx_flag+0x14c/0x1b0 fs/ext4/ext4.h:2898 (P)
 ext4_rename fs/ext4/namei.c:3963 [inline]
 ext4_rename2+0x19a0/0x2410 fs/ext4/namei.c:4208
 vfs_rename+0x9c0/0xc94 fs/namei.c:5216
 do_renameat2+0x5ec/0x8a0 fs/namei.c:5364
 __do_sys_renameat2 fs/namei.c:5398 [inline]
 __se_sys_renameat2 fs/namei.c:5395 [inline]
 __arm64_sys_renameat2+0xd8/0xf4 fs/namei.c:5395
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:744
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:763
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
irq event stamp: 4872
hardirqs last  enabled at (4871): [<ffff8000806056ec>] seqcount_lockdep_reader_access+0x80/0x104 include/linux/seqlock.h:74
hardirqs last disabled at (4872): [<ffff80008a4f41ec>] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:434
softirqs last  enabled at (4762): [<ffff8000801d95b4>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32
softirqs last disabled at (4760): [<ffff8000801d9580>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19
---[ end trace 0000000000000000 ]---