general protection fault, probably for non-canonical address 0xdffffc0000000008: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047]
CPU: 1 PID: 112 Comm: jfsCommit Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x139/0x9c0 fs/jfs/jfs_logmgr.c:935
Code: d0 b2 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 15 d1 dc fe 4d 8b 3f 49 83 c7 40 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 f9 d0 dc fe 49 8b 3f e8 41 d0 b2 fe
RSP: 0018:ffffc900024efc40 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: c62fa53f43915000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900024efd48 R08: 0000000000000004 R09: 0000000000000004
R10: ffffc900024efb64 R11: fffff5200049df75 R12: ffff888058511000
R13: dffffc0000000000 R14: ffff88802f93a238 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c384ff0 CR3: 0000000079fec000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 jfs_syncpt+0x7b/0x90 fs/jfs/jfs_logmgr.c:1041
 txEnd+0x2e5/0x520 fs/jfs/jfs_txnmgr.c:550
 txLazyCommit fs/jfs/jfs_txnmgr.c:2685 [inline]
 jfs_lazycommit+0x5a6/0xa60 fs/jfs/jfs_txnmgr.c:2733
 kthread+0x2fa/0x390 kernel/kthread.c:388
 ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline]
RIP: 0010:lmLogSync+0x139/0x9c0 fs/jfs/jfs_logmgr.c:935
Code: d0 b2 fe 4d 8d 7e f0 4c 89 f8 48 c1 e8 03 80 3c 18 00 74 08 4c 89 ff e8 15 d1 dc fe 4d 8b 3f 49 83 c7 40 4c 89 f8 48 c1 e8 03 <80> 3c 18 00 74 08 4c 89 ff e8 f9 d0 dc fe 49 8b 3f e8 41 d0 b2 fe
RSP: 0018:ffffc900024efc40 EFLAGS: 00010202
RAX: 0000000000000008 RBX: dffffc0000000000 RCX: c62fa53f43915000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc900024efd48 R08: 0000000000000004 R09: 0000000000000004
R10: ffffc900024efb64 R11: fffff5200049df75 R12: ffff888058511000
R13: dffffc0000000000 R14: ffff88802f93a238 R15: 0000000000000040
FS:  0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c384ff0 CR3: 000000002deb3000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
   0:	d0 b2 fe 4d 8d 7e    	shlb   0x7e8d4dfe(%rdx)
   6:	f0 4c 89 f8          	lock mov %r15,%rax
   a:	48 c1 e8 03          	shr    $0x3,%rax
   e:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
  12:	74 08                	je     0x1c
  14:	4c 89 ff             	mov    %r15,%rdi
  17:	e8 15 d1 dc fe       	call   0xfedcd131
  1c:	4d 8b 3f             	mov    (%r15),%r15
  1f:	49 83 c7 40          	add    $0x40,%r15
  23:	4c 89 f8             	mov    %r15,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1) <-- trapping instruction
  2e:	74 08                	je     0x38
  30:	4c 89 ff             	mov    %r15,%rdi
  33:	e8 f9 d0 dc fe       	call   0xfedcd131
  38:	49 8b 3f             	mov    (%r15),%rdi
  3b:	e8 41 d0 b2 fe       	call   0xfeb2d081