EXT4-fs warning (device loop2): __ext4fs_dirhash:270: inode #2: comm syz-executor358: Siphash requires key
EXT4-fs warning (device loop2): __ext4fs_dirhash:270: inode #2: comm syz-executor358: Siphash requires key
BUG: unable to handle page fault for address: ffffed112377fcfe
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 23fff2067 
P4D 23fff2067 PUD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 1565 Comm: syz-executor358 Not tainted 5.10.223-syzkaller-00011-g1c5354a314ea #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
RIP: 0010:do_split+0x1454/0x2310 fs/ext4/namei.c:2011
Code: f8 48 c1 e8 03 0f b6 04 10 84 c0 48 89 74 24 10 0f 85 7c 0c 00 00 46 8b 34 e6 41 8d 44 24 ff 48 8d 1c c6 48 89 d8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 85 0c 00 00 8b 1b 44 89 f7 89 de e8 f4 04
RSP: 0018:ffffc90003817680 EFLAGS: 00010a02
RAX: 1ffff1112377fcfe RBX: ffff88891bbfe7f0 RCX: ffff88811fda2780
RDX: dffffc0000000000 RSI: ffff88811bbfe7f8 RDI: ffff88811bbfe7f8
RBP: ffffc90003817870 R08: ffffffff81e4a4a1 R09: ffffed103ee2a5f8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000400 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcbc91836c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed112377fcfe CR3: 000000011a376000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 make_indexed_dir+0xd7d/0x1340 fs/ext4/namei.c:2299
 ext4_add_entry+0xdcf/0x1280 fs/ext4/namei.c:2411
 __ext4_link+0x4e9/0x790 fs/ext4/namei.c:3601
 ext4_link+0x1f3/0x290 fs/ext4/namei.c:3642
 vfs_link+0x68f/0x890 fs/namei.c:4213
 do_linkat+0x471/0x8b0 fs/namei.c:4281
 __do_sys_link fs/namei.c:4310 [inline]
 __se_sys_link fs/namei.c:4308 [inline]
 __x64_sys_link+0x68/0x80 fs/namei.c:4308
 do_syscall_64+0x34/0x70
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fcbc91e7ec9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 18 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fcbc9183218 EFLAGS: 00000246 ORIG_RAX: 0000000000000056
RAX: ffffffffffffffda RBX: 00007fcbc92706b8 RCX: 00007fcbc91e7ec9
RDX: 0000000000000000 RSI: 0000000020000bc0 RDI: 0000000020001240
RBP: 00007fcbc92706b0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fcbc923c664
R13: 00007fcbc923c0c0 R14: 00007fcbc923c560 R15: 0031656c69662f2e
Modules linked in:
CR2: ffffed112377fcfe
---[ end trace 4b2c8e5c48fa4b9a ]---
RIP: 0010:do_split+0x1454/0x2310 fs/ext4/namei.c:2011
Code: f8 48 c1 e8 03 0f b6 04 10 84 c0 48 89 74 24 10 0f 85 7c 0c 00 00 46 8b 34 e6 41 8d 44 24 ff 48 8d 1c c6 48 89 d8 48 c1 e8 03 <0f> b6 04 10 84 c0 0f 85 85 0c 00 00 8b 1b 44 89 f7 89 de e8 f4 04
RSP: 0018:ffffc90003817680 EFLAGS: 00010a02
RAX: 1ffff1112377fcfe RBX: ffff88891bbfe7f0 RCX: ffff88811fda2780
RDX: dffffc0000000000 RSI: ffff88811bbfe7f8 RDI: ffff88811bbfe7f8
RBP: ffffc90003817870 R08: ffffffff81e4a4a1 R09: ffffed103ee2a5f8
R10: 0000000000000000 R11: dffffc0000000001 R12: 0000000000000000
R13: 0000000000000400 R14: 0000000000000000 R15: 0000000000000000
FS:  00007fcbc91836c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed112377fcfe CR3: 000000011a376000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	f8                   	clc
   1:	48 c1 e8 03          	shr    $0x3,%rax
   5:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax
   9:	84 c0                	test   %al,%al
   b:	48 89 74 24 10       	mov    %rsi,0x10(%rsp)
  10:	0f 85 7c 0c 00 00    	jne    0xc92
  16:	46 8b 34 e6          	mov    (%rsi,%r12,8),%r14d
  1a:	41 8d 44 24 ff       	lea    -0x1(%r12),%eax
  1f:	48 8d 1c c6          	lea    (%rsi,%rax,8),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 10          	movzbl (%rax,%rdx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 85 0c 00 00    	jne    0xcbb
  36:	8b 1b                	mov    (%rbx),%ebx
  38:	44 89 f7             	mov    %r14d,%edi
  3b:	89 de                	mov    %ebx,%esi
  3d:	e8                   	.byte 0xe8
  3e:	f4                   	hlt
  3f:	04                   	.byte 0x4