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. Opts: test_dummy_encryption,journal_ioprio=0x0000000000000004,errors=remount-ro,. Quota mode: none.
fscrypt: AES-256-CTS-CBC using implementation "cts-cbc-aes-aesni"
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WARNING: CPU: 0 PID: 4314 at fs/crypto/fname.c:543 fscrypt_fname_siphash+0xa4/0xe0 fs/crypto/fname.c:543
Modules linked in:
CPU: 0 PID: 4314 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:fscrypt_fname_siphash+0xa4/0xe0 fs/crypto/fname.c:543
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 51 49 20 02 e8 0c b6 9a ff <0f> 0b eb b3 44 89 f9 80 e1 07 38 c1 7c 9e 4c 89 ff e8 66 1e df ff
RSP: 0018:ffffc9000317f578 EFLAGS: 00010293
RAX: ffffffff81dd1604 RBX: ffffc9000317f660 RCX: ffff8880271b0000
RDX: 0000000000000000 RSI: ffffc9000317f660 RDI: ffff88806e475c58
RBP: ffffc9000317f6d0 R08: ffff8880271b0000 R09: 0000000000000007
R10: 0000000000000006 R11: 0000000000000000 R12: dffffc0000000000
R13: 000000008d4c4d91 R14: ffff888071eaf000 R15: ffff888071eaf050
FS:  0000555555e0b500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000076dc9000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 __ext4fs_dirhash+0x8bc/0xf40 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:609 [inline]
 ext4_readdir+0x2c16/0x3a60 fs/ext4/dir.c:145
 iterate_dir+0x218/0x560 fs/readdir.c:-1
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0xe5/0x260 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f4ef321c749
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd5158f3d8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 00007f4ef3472fa0 RCX: 00007f4ef321c749
RDX: 0000000000000059 RSI: 0000000000000000 RDI: 0000000000000004
RBP: 00007f4ef32a0f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f4ef3472fa0 R14: 00007f4ef3472fa0 R15: 0000000000000003
 </TASK>