Oops: general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 UID: 0 PID: 113 Comm: jfsCommit Not tainted 6.14.0-rc3-syzkaller-00267-gff202c5028a1 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
RIP: 0010:write_special_inodes+0xa9/0x170 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 1b ce 18 08 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b1 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 8e 00 00 00 49 8b 7d 30 2e e8 e3 cd 18 08 48 8d
RSP: 0018:ffffc90002df7be0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff888032642600 RCX: ffffffff81ee8fde
RDX: 0000000000000000 RSI: ffffffff81ee8f91 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff81ef6000
R13: 0000000000000000 R14: ffff88804e91a000 R15: ffffc90002749332
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffff0000000 CR3: 0000000033eb6000 CR4: 0000000000350ef0
Call Trace:
 <TASK>
 lmLogSync+0xd3/0x820 fs/jfs/jfs_logmgr.c:935
 jfs_syncpt+0x89/0xa0 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x30d/0x5a0 fs/jfs/jfs_txnmgr.c:549
 txLazyCommit fs/jfs/jfs_txnmgr.c:2684 [inline]
 jfs_lazycommit+0x77b/0xb20 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x3b2/0x750 kernel/kthread.c:464
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes+0xa9/0x170 fs/jfs/jfs_logmgr.c:208
Code: 2e e8 1b ce 18 08 48 8d 7b 28 48 89 f8 48 c1 e8 03 80 3c 28 00 0f 85 b1 00 00 00 4c 8b 6b 28 49 8d 7d 30 48 89 f8 48 c1 e8 03 <80> 3c 28 00 0f 85 8e 00 00 00 49 8b 7d 30 2e e8 e3 cd 18 08 48 8d
RSP: 0018:ffffc90002df7be0 EFLAGS: 00010216
RAX: 0000000000000006 RBX: ffff888032642600 RCX: ffffffff81ee8fde
RDX: 0000000000000000 RSI: ffffffff81ee8f91 RDI: 0000000000000030
RBP: dffffc0000000000 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffffff81ef6000
R13: 0000000000000000 R14: ffff88804e91a000 R15: ffffc90002749332
FS:  0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: fffffffff0000000 CR3: 000000004253a000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	2e e8 1b ce 18 08    	cs call 0x818ce21
   6:	48 8d 7b 28          	lea    0x28(%rbx),%rdi
   a:	48 89 f8             	mov    %rdi,%rax
   d:	48 c1 e8 03          	shr    $0x3,%rax
  11:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
  15:	0f 85 b1 00 00 00    	jne    0xcc
  1b:	4c 8b 6b 28          	mov    0x28(%rbx),%r13
  1f:	49 8d 7d 30          	lea    0x30(%r13),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1) <-- trapping instruction
  2e:	0f 85 8e 00 00 00    	jne    0xc2
  34:	49 8b 7d 30          	mov    0x30(%r13),%rdi
  38:	2e e8 e3 cd 18 08    	cs call 0x818ce21
  3e:	48                   	rex.W
  3f:	8d                   	.byte 0x8d