[syzbot] [jfs?] kernel BUG in clear_inode (2)

syzbot
2024-10-28T16:33:27Z

Hello,

syzbot found the following issue on:

HEAD commit: 4e46774408d9 Merge tag 'for-6.12-rc4-tag' of git://git.ker..
git tree: upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17d0b0e7980000
kernel config: https://syzkaller.appspot.com/x/.config?x=41330fd2db03893d
dashboard link: https://syzkaller.appspot.com/bug?extid=ac2116e48989e84a2893
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=17a9ae40580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1030b0e7980000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d5a3632f9dde/disk-4e467744.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/c6d73f937198/vmlinux-4e467744.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b8cdecc78206/bzImage-4e467744.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/07de6ffca997/mount_0.gz

Bisection is inconclusive: the issue happens on the oldest tested release.

bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=10b0b287980000
final oops: https://syzkaller.appspot.com/x/report.txt?x=12b0b287980000
console output: https://syzkaller.appspot.com/x/log.txt?x=14b0b287980000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+ac2116e48989e84a2893@syzkaller.appspotmail.com

------------[ cut here ]------------
kernel BUG at fs/inode.c:668!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 113 Comm: jfsCommit Not tainted 6.12.0-rc4-syzkaller-00085-g4e46774408d9 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:clear_inode+0x168/0x190 fs/inode.c:668
Code: 4c 89 f7 e8 ba fe e5 ff e9 61 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c c1 4c 89 f7 e8 90 ff e5 ff eb b7 e8 09 5d 7f ff 90 <0f> 0b e8 01 5d 7f ff 90 0f 0b e8 f9 5c 7f ff 90 0f 0b e8 f1 5c 7f
RSP: 0018:ffffc90002cffae8 EFLAGS: 00010093
RAX: ffffffff82157a87 RBX: 0000000000000001 RCX: ffff88801eb2bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002cffc90 R08: ffffffff82157977 R09: fffff5200059ff38
R10: dffffc0000000000 R11: fffff5200059ff38 R12: dffffc0000000000
R13: ffff888071503c00 R14: ffff888071503da8 R15: ffff888071503b80
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b23f95ed8 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
jfs_evict_inode+0xb5/0x440 fs/jfs/inode.c:166
evict+0x4e8/0x9b0 fs/inode.c:725
txUpdateMap+0x931/0xb10 fs/jfs/jfs_txnmgr.c:2367
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:clear_inode+0x168/0x190 fs/inode.c:668
Code: 4c 89 f7 e8 ba fe e5 ff e9 61 ff ff ff 44 89 f1 80 e1 07 80 c1 03 38 c1 7c c1 4c 89 f7 e8 90 ff e5 ff eb b7 e8 09 5d 7f ff 90 <0f> 0b e8 01 5d 7f ff 90 0f 0b e8 f9 5c 7f ff 90 0f 0b e8 f1 5c 7f
RSP: 0018:ffffc90002cffae8 EFLAGS: 00010093
RAX: ffffffff82157a87 RBX: 0000000000000001 RCX: ffff88801eb2bc00
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc90002cffc90 R08: ffffffff82157977 R09: fffff5200059ff38
R10: dffffc0000000000 R11: fffff5200059ff38 R12: dffffc0000000000
R13: ffff888071503c00 R14: ffff888071503da8 R15: ffff888071503b80
FS: 0000000000000000(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f4b23f95ed8 CR3: 000000000e734000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

---
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