Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 114 Comm: jfsCommit Not tainted 6.11.0-rc3-syzkaller-00271-g85652baa895b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024
RIP: 0010:diUpdatePMap+0x5f/0xd90 fs/jfs/jfs_imap.c:2742
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 66 9f d6 fe 48 8b 2b 4d 89 f7 49 c1 ef 0c 48 8d 5d 04 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 39 0a 00 00 8b 1b 89 df 44 89 fe e8 c8
RSP: 0018:ffffc90002cb7c20 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88801af50000
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffff888045e2a910
RBP: 0000000000000000 R08: ffffffff83263156 R09: 0000000000000000
R10: ffffc90002cb7d20 R11: fffff52000596fa6 R12: dffffc0000000000
R13: ffff888045e2a910 R14: 0000000000000007 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9300000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe52f84980 CR3: 0000000056f78000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
txUpdateMap+0x81c/0xb10 fs/jfs/jfs_txnmgr.c:2356
txLazyCommit fs/jfs/jfs_txnmgr.c:2664 [inline]
jfs_lazycommit+0x49a/0xb80 fs/jfs/jfs_txnmgr.c:2733
kthread+0x2f0/0x390 kernel/kthread.c:389
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:diUpdatePMap+0x5f/0xd90 fs/jfs/jfs_imap.c:2742
Code: 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 66 9f d6 fe 48 8b 2b 4d 89 f7 49 c1 ef 0c 48 8d 5d 04 48 89 d8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 39 0a 00 00 8b 1b 89 df 44 89 fe e8 c8
RSP: 0018:ffffc90002cb7c20 EFLAGS: 00010247
RAX: 0000000000000000 RBX: 0000000000000004 RCX: ffff88801af50000
RDX: 0000000000000000 RSI: 0000000000000007 RDI: ffff888045e2a910
RBP: 0000000000000000 R08: ffffffff83263156 R09: 0000000000000000
R10: ffffc90002cb7d20 R11: fffff52000596fa6 R12: dffffc0000000000
R13: ffff888045e2a910 R14: 0000000000000007 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b9200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb00b4e9440 CR3: 0000000075dfc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: 89 d8 mov %ebx,%eax
2: 48 c1 e8 03 shr $0x3,%rax
6: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1)
b: 74 08 je 0x15
d: 48 89 df mov %rbx,%rdi
10: e8 66 9f d6 fe call 0xfed69f7b
15: 48 8b 2b mov (%rbx),%rbp
18: 4d 89 f7 mov %r14,%r15
1b: 49 c1 ef 0c shr $0xc,%r15
1f: 48 8d 5d 04 lea 0x4(%rbp),%rbx
23: 48 89 d8 mov %rbx,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 39 0a 00 00 jne 0xa70
37: 8b 1b mov (%rbx),%ebx
39: 89 df mov %ebx,%edi
3b: 44 89 fe mov %r15d,%esi
3e: e8 .byte 0xe8
3f: c8 .byte 0xc8