[moderation] [jfs?] BUG: unable to handle kernel paging request in txAllocPMap

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 40fbbd64bba6 Merge tag 'pull-fixes' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1120177c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=513255d80ab78f2b
dashboard link: https://syzkaller.appspot.com/bug?extid=3cb326afc4692d993f88
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
CC: [jfs-dis...@lists.sourceforge.net linux-...@vger.kernel.org sha...@kernel.org]

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-40fbbd64.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/0611ffd6ce1a/vmlinux-40fbbd64.xz
kernel image: https://storage.googleapis.com/syzbot-assets/093f7cb2251e/bzImage-40fbbd64.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3cb326...@syzkaller.appspotmail.com

BUG: unable to handle page fault for address: ffffed1013627a22
#PF: supervisor read access in kernel mode
#PF: error_code(0x0000) - not-present page
PGD 5ffcd067 P4D 5ffcd067 PUD 2fff7067 PMD 0
Oops: Oops: 0000 [#1] SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 103 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:txAllocPMap+0x32a/0x6b0 fs/jfs/jfs_txnmgr.c:2412
Code: db fe 48 89 1c 24 4d 8b 3c 24 41 be 01 00 00 00 48 c7 c0 60 dd 58 8e 48 c1 e8 03 48 89 44 24 28 4d 89 fc 4c 89 fb 48 c1 eb 03 <42> 0f b6 04 2b 84 c0 0f 85 32 01 00 00 41 0f b6 2c 24 89 ee 83 e6
RSP: 0000:ffffc900018b7b38 EFLAGS: 00010a06
RAX: 1ffffffff1cb1bac RBX: 1ffff11013627a22 RCX: 0000000000000000
RDX: ffff888000d28000 RSI: 0000000000000076 RDI: 0000000000000000
RBP: 0000000000000076 R08: ffffc900018b7bff R09: 0000000000000000
R10: ffffc900018b7bf0 R11: fffff52000316f80 R12: ffff88809b13d110
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88809b13d110
FS: 0000000000000000(0000) GS:ffff88808d22a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1013627a22 CR3: 0000000011e8b000 CR4: 0000000000352ef0
Call Trace:
<TASK>
txUpdateMap+0x2a2/0x9c0 fs/jfs/jfs_txnmgr.c:2309
txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
jfs_lazycommit+0x43f/0xa90 fs/jfs/jfs_txnmgr.c:2734
kthread+0x711/0x8a0 kernel/kthread.c:463
ret_from_fork+0x599/0xb30 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:246
</TASK>
Modules linked in:
CR2: ffffed1013627a22
---[ end trace 0000000000000000 ]---
RIP: 0010:txAllocPMap+0x32a/0x6b0 fs/jfs/jfs_txnmgr.c:2412
Code: db fe 48 89 1c 24 4d 8b 3c 24 41 be 01 00 00 00 48 c7 c0 60 dd 58 8e 48 c1 e8 03 48 89 44 24 28 4d 89 fc 4c 89 fb 48 c1 eb 03 <42> 0f b6 04 2b 84 c0 0f 85 32 01 00 00 41 0f b6 2c 24 89 ee 83 e6
RSP: 0000:ffffc900018b7b38 EFLAGS: 00010a06
RAX: 1ffffffff1cb1bac RBX: 1ffff11013627a22 RCX: 0000000000000000
RDX: ffff888000d28000 RSI: 0000000000000076 RDI: 0000000000000000
RBP: 0000000000000076 R08: ffffc900018b7bff R09: 0000000000000000
R10: ffffc900018b7bf0 R11: fffff52000316f80 R12: ffff88809b13d110
R13: dffffc0000000000 R14: 0000000000000001 R15: ffff88809b13d110
FS: 0000000000000000(0000) GS:ffff88808d22a000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffed1013627a22 CR3: 0000000011e8b000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 1 bytes skipped:
0: fe 48 89 decb -0x77(%rax)
3: 1c 24 sbb $0x24,%al
5: 4d 8b 3c 24 mov (%r12),%r15
9: 41 be 01 00 00 00 mov $0x1,%r14d
f: 48 c7 c0 60 dd 58 8e mov $0xffffffff8e58dd60,%rax
16: 48 c1 e8 03 shr $0x3,%rax
1a: 48 89 44 24 28 mov %rax,0x28(%rsp)
1f: 4d 89 fc mov %r15,%r12
22: 4c 89 fb mov %r15,%rbx
25: 48 c1 eb 03 shr $0x3,%rbx
* 29: 42 0f b6 04 2b movzbl (%rbx,%r13,1),%eax <-- trapping instruction
2e: 84 c0 test %al,%al
30: 0f 85 32 01 00 00 jne 0x168
36: 41 0f b6 2c 24 movzbl (%r12),%ebp
3b: 89 ee mov %ebp,%esi
3d: 83 .byte 0x83
3e: e6 .byte 0xe6


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