Re: [syzbot] [jfs?] BUG: unable to handle kernel paging request in diUpdatePMap

[syzbot <syzbot+7fc112f7a4a0546731c5@syzkaller.appspotmail.com>]

> #syz dup: https://syzkaller.appspot.com/bug?extid=4d0a0feb49c5138cac46

can't find the dup bug

>
>
> On 11/7/25 15:29, syzbot wrote:
>> CAUTION: This email comes from a non Wind River email account!
>> Do not click links or open attachments unless you recognize the sender and know the content is safe.
>>
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    dcb6fa37fd7b Linux 6.18-rc3
>> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
>> console output: https://syzkaller.appspot.com/x/log.txt?x=1451a532580000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=b8b659f0cab27b22
>> dashboard link: https://syzkaller.appspot.com/bug?extid=7fc112f7a4a0546731c5
>> compiler:       Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
>> userspace arch: arm64
>> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17fc5812580000
>> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=110f3012580000
>>
>> Downloadable assets:
>> disk image: https://storage.googleapis.com/syzbot-assets/ae6bec0d0398/disk-dcb6fa37.raw.xz
>> vmlinux: https://storage.googleapis.com/syzbot-assets/dcc732da66c3/vmlinux-dcb6fa37.xz
>> kernel image: https://storage.googleapis.com/syzbot-assets/301d1bbdecc2/Image-dcb6fa37.gz.xz
>> mounted in repro: https://storage.googleapis.com/syzbot-assets/94e5a8b9504e/mount_0.gz
>>    fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=1051a532580000)
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+7fc112f7a4a0546731c5@syzkaller.appspotmail.com
>>
>> Unable to handle kernel paging request at virtual address fbd5200000000021
>> KASAN: maybe wild-memory-access in range [0xdead000000000108-0xdead00000000010f]
>> Mem abort info:
>>    ESR = 0x0000000096000004
>>    EC = 0x25: DABT (current EL), IL = 32 bits
>>    SET = 0, FnV = 0
>>    EA = 0, S1PTW = 0
>>    FSC = 0x04: level 0 translation fault
>> Data abort info:
>>    ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
>>    CM = 0, WnR = 0, TnD = 0, TagAccess = 0
>>    GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
>> [fbd5200000000021] address between user and kernel address ranges
>> Internal error: Oops: 0000000096000004 [#1]  SMP
>> Modules linked in:
>> CPU: 0 UID: 0 PID: 100 Comm: jfsCommit Not tainted syzkaller #0 PREEMPT
>> Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
>> pstate: 834000c5 (Nzcv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--)
>> pc : __list_add_valid_or_report+0x3c/0x148 lib/list_debug.c:29
>> lr : __list_add_valid include/linux/list.h:96 [inline]
>> lr : __list_add include/linux/list.h:158 [inline]
>> lr : list_add include/linux/list.h:177 [inline]
>> lr : diUpdatePMap+0x4e8/0xb90 fs/jfs/jfs_imap.c:2831
>> sp : ffff800099e67b50
>> x29: ffff800099e67b50 x28: dfff800000000000 x27: 00000000c0000000
>> x26: 0000000000000000 x25: dead000000000100 x24: 1bd5a00000000021
>> x23: dfff800000000000 x22: dead000000000108 x21: ffff0000e21152f8
>> x20: ffff80009b403120 x19: dead000000000100 x18: 0000000000000000
>> x17: ffff80010ca0e000 x16: ffff800080536ef4 x15: ffff7000133ccf58
>> x14: 1ffff000133ccf58 x13: 0000000000000004 x12: ffffffffffffffff
>> x11: ffff7000133ccf58 x10: 0000000000ff0100 x9 : 0000000000000000
>> x8 : 0000000000000000 x7 : ffff800081c11594 x6 : 0000000000000000
>> x5 : 0000000000000001 x4 : 0000000000000001 x3 : ffff80008053700c
>> x2 : dead000000000100 x1 : ffff80009b403120 x0 : ffff0000e21152f8
>> Call trace:
>>   __list_add_valid_or_report+0x3c/0x148 lib/list_debug.c:29 (P)
>>   __list_add_valid include/linux/list.h:96 [inline]
>>   __list_add include/linux/list.h:158 [inline]
>>   list_add include/linux/list.h:177 [inline]
>>   diUpdatePMap+0x4e8/0xb90 fs/jfs/jfs_imap.c:2831
>>   txUpdateMap+0x708/0x8d0 fs/jfs/jfs_txnmgr.c:2357
>>   txLazyCommit fs/jfs/jfs_txnmgr.c:2665 [inline]
>>   jfs_lazycommit+0x394/0x94c fs/jfs/jfs_txnmgr.c:2734
>>   kthread+0x5fc/0x75c kernel/kthread.c:463
>>   ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844
>> Code: aa0103f4 d343fed8 f2fbfff7 aa0003f5 (38776b08)
>> ---[ end trace 0000000000000000 ]---
>> ----------------
>> Code disassembly (best guess):
>>     0:   aa0103f4        mov     x20, x1
>>     4:   d343fed8        lsr     x24, x22, #3
>>     8:   f2fbfff7        movk    x23, #0xdfff, lsl #48
>>     c:   aa0003f5        mov     x21, x0
>> * 10:   38776b08        ldrb    w8, [x24, x23] <-- trapping instruction
>>
>>
>> ---
>> This report is generated by a bot. It may contain errors.
>> See https://goo.gl/tpsmEJ for more information about syzbot.
>> syzbot engineers can be reached at syzkaller@googlegroups.com.
>>
>> syzbot will keep track of this issue. See:
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>>
>> If the report is already addressed, let syzbot know by replying with:
>> #syz fix: exact-commit-title
>>
>> If you want syzbot to run the reproducer, reply with:
>> #syz test: git://repo/address.git branch-or-commit-hash
>> If you attach or paste a git patch, syzbot will apply it before testing.
>>
>> If you want to overwrite report's subsystems, reply with:
>> #syz set subsystems: new-subsystem
>> (See the list of subsystem names on the web dashboard)
>>
>> If the report is a duplicate of another one, reply with:
>> #syz dup: exact-subject-of-another-report
>>
>> If you want to undo deduplication, reply with:
>> #syz undup
>>
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