syzbot

EXT4-fs (loop0): encrypted files will use data=ordered instead of data journaling mode
EXT4-fs (loop0): 1 truncate cleaned up
EXT4-fs (loop0): mounted filesystem without journal. Quota mode: none.
fscrypt: AES-256-CTS-CBC using implementation "cts-cbc-aes-aesni"
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WARNING: CPU: 1 PID: 4249 at fs/crypto/fname.c:567 fscrypt_fname_siphash+0xa4/0xe0 fs/crypto/fname.c:567
Modules linked in:
CPU: 1 PID: 4249 Comm: syz-executor354 Not tainted 6.1.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fscrypt_fname_siphash+0xa4/0xe0 fs/crypto/fname.c:567
Code: 48 89 d8 48 c1 e8 03 42 0f b6 04 20 84 c0 75 32 8b 33 49 83 c6 40 4c 89 f2 5b 41 5c 41 5e 41 5f e9 81 4a 09 08 e8 bc e4 89 ff <0f> 0b eb b3 44 89 f9 80 e1 07 38 c1 7c 9e 4c 89 ff e8 36 5d db ff
RSP: 0018:ffffc90003b86e98 EFLAGS: 00010293
RAX: ffffffff81f6f1b4 RBX: ffffc90003b86f80 RCX: ffff8880302a3b80
RDX: 0000000000000000 RSI: ffffc90003b86f80 RDI: ffff88807512dcf8
RBP: ffffc90003b86ff0 R08: ffff8880302a3b80 R09: 0000000000000007
R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000008d4c4d91 R14: ffff888072821000 R15: ffff888072821050
FS:  0000555562916480(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000002000 CR3: 0000000027ac8000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4fs_dirhash+0x932/0x1000 fs/ext4/hash.c:268
 ext4fs_dirhash+0x150/0x2d0 fs/ext4/hash.c:322
 htree_dirblock_to_tree+0x6c9/0xe70 fs/ext4/namei.c:1125
 ext4_htree_fill_tree+0x5d4/0x10e0 fs/ext4/namei.c:1220
 ext4_dx_readdir fs/ext4/dir.c:608 [inline]
 ext4_readdir+0x2cfa/0x3b60 fs/ext4/dir.c:145
 iterate_dir+0x218/0x560 fs/readdir.c:-1
 ovl_dir_read+0xfc/0x560 fs/overlayfs/readdir.c:309
 ovl_check_d_type_supported+0x95/0x100 fs/overlayfs/readdir.c:1059
 ovl_make_workdir fs/overlayfs/super.c:1406 [inline]
 ovl_get_workdir+0x50e/0x1540 fs/overlayfs/super.c:1539
 ovl_fill_super+0x1925/0x2ae0 fs/overlayfs/super.c:2095
 mount_nodev+0x52/0xe0 fs/super.c:1489
 legacy_get_tree+0xe6/0x180 fs/fs_context.c:632
 vfs_get_tree+0x88/0x270 fs/super.c:1573
 do_new_mount+0x24a/0xa40 fs/namespace.c:3054
 do_mount fs/namespace.c:3397 [inline]
 __do_sys_mount fs/namespace.c:3605 [inline]
 __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:3582
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f6d68d535f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc17fb2a08 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 6f6972706f695f6c RCX: 00007f6d68d535f9
RDX: 0000200000000200 RSI: 00002000000003c0 RDI: 0000000000000000
RBP: 00007ffc17fb2a18 R08: 0000200000001100 R09: 00007f6d68d1f300
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc17fb2c78 R14: 0000000000000001 R15: 0000000000000001
 </TASK>