REISERFS (device loop2): Using tea hash to sort names
REISERFS (device loop2): Created .reiserfs_priv - reserved for xattr storage.
REISERFS warning (device loop2): vs-13060 reiserfs_update_sd_size: stat data of object [2 5 0x0 SD] (nlink == 1) not found (pos 2)
BUG: kernel NULL pointer dereference, address: 000000000000000c
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 10d090067 P4D 10d090067 PUD 0 
Oops: 0002 [#1] PREEMPT SMP
CPU: 1 PID: 4604 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:reiserfs_get_block+0x7fe/0x12a0 fs/reiserfs/inode.c:1052
Code: 00 83 f8 ff 0f 85 be 01 00 00 b8 02 00 00 00 e9 3a ff ff ff bd 01 00 00 00 4c 8d 6c 24 54 4c 39 f5 77 5d 8b 84 24 94 00 00 00 <41> 89 44 ad fc 48 8b 4b 38 48 8b 74 24 20 48 f7 06 10 00 00 00 75
RSP: 0018:ffffc9000294ba18 EFLAGS: 00010297
RAX: 0000000000000217 RBX: ffff88810f3d87a8 RCX: 000000000000000c
RDX: 2000000000000000 RSI: 0000000000000d40 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000003db
R10: 0000000000000003 R11: 00000000000001e8 R12: ffff8881161d1048
R13: 0000000000000010 R14: 00000000000003f4 R15: 0000000000001001
FS:  00007f628ce6c6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000c CR3: 000000010b188000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 __block_write_begin_int+0x1f3/0x850 fs/buffer.c:2124
 reiserfs_write_begin+0x10b/0x220 fs/reiserfs/inode.c:2771
 generic_perform_write+0xa4/0x220 mm/filemap.c:4031
 generic_file_write_iter+0x47/0xc0 mm/filemap.c:4152
 do_iter_readv_writev fs/read_write.c:-1 [inline]
 do_iter_write+0x1e5/0x300 fs/read_write.c:860
 vfs_writev+0x1b3/0x290 fs/read_write.c:933
 do_pwritev fs/read_write.c:1030 [inline]
 __do_sys_pwritev2 fs/read_write.c:1089 [inline]
 __se_sys_pwritev2+0xad/0x110 fs/read_write.c:1080
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f628bf8f749
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:00007f628ce6c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148
RAX: ffffffffffffffda RBX: 00007f628c1e5fa0 RCX: 00007f628bf8f749
RDX: 0000000000000001 RSI: 00002000000001c0 RDI: 0000000000000006
RBP: 00007f628c013f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000e7b R11: 0000000000000246 R12: 0000000000000000
R13: 00007f628c1e6038 R14: 00007f628c1e5fa0 R15: 00007ffcaa53ca18
 </TASK>
Modules linked in:
CR2: 000000000000000c
---[ end trace 0000000000000000 ]---
RIP: 0010:reiserfs_get_block+0x7fe/0x12a0 fs/reiserfs/inode.c:1052
Code: 00 83 f8 ff 0f 85 be 01 00 00 b8 02 00 00 00 e9 3a ff ff ff bd 01 00 00 00 4c 8d 6c 24 54 4c 39 f5 77 5d 8b 84 24 94 00 00 00 <41> 89 44 ad fc 48 8b 4b 38 48 8b 74 24 20 48 f7 06 10 00 00 00 75
RSP: 0018:ffffc9000294ba18 EFLAGS: 00010297
RAX: 0000000000000217 RBX: ffff88810f3d87a8 RCX: 000000000000000c
RDX: 2000000000000000 RSI: 0000000000000d40 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000003db
R10: 0000000000000003 R11: 00000000000001e8 R12: ffff8881161d1048
R13: 0000000000000010 R14: 00000000000003f4 R15: 0000000000001001
FS:  00007f628ce6c6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000000000000c CR3: 000000010b188000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	00 83 f8 ff 0f 85    	add    %al,-0x7af00008(%rbx)
   6:	be 01 00 00 b8       	mov    $0xb8000001,%esi
   b:	02 00                	add    (%rax),%al
   d:	00 00                	add    %al,(%rax)
   f:	e9 3a ff ff ff       	jmp    0xffffff4e
  14:	bd 01 00 00 00       	mov    $0x1,%ebp
  19:	4c 8d 6c 24 54       	lea    0x54(%rsp),%r13
  1e:	4c 39 f5             	cmp    %r14,%rbp
  21:	77 5d                	ja     0x80
  23:	8b 84 24 94 00 00 00 	mov    0x94(%rsp),%eax
* 2a:	41 89 44 ad fc       	mov    %eax,-0x4(%r13,%rbp,4) <-- trapping instruction
  2f:	48 8b 4b 38          	mov    0x38(%rbx),%rcx
  33:	48 8b 74 24 20       	mov    0x20(%rsp),%rsi
  38:	48 f7 06 10 00 00 00 	testq  $0x10,(%rsi)
  3f:	75                   	.byte 0x75