[moderation] [reiserfs?] BUG: unable to handle kernel paging request in bfs_fill_super

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 7ba2090ca64e Merge tag 'ceph-for-6.6-rc1' of https://githu..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10ff6f10680000
kernel config: https://syzkaller.appspot.com/x/.config?x=ed626705db308b2d
dashboard link: https://syzkaller.appspot.com/bug?extid=3e410aa59d72e31f3db9
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
CC: [linux-...@vger.kernel.org linux-...@vger.kernel.org reiserf...@vger.kernel.org]

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

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/7abbf7618c3a/disk-7ba2090c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/694adc723518/vmlinux-7ba2090c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3c5d9addc4e4/bzImage-7ba2090c.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3e410a...@syzkaller.appspotmail.com

loop3: detected capacity change from 0 to 64
kernel tried to execute NX-protected page - exploit attempt? (uid: 0)
BUG: unable to handle page fault for address: ffffffff92030d80
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0011) - permissions violation
PGD d133067 P4D d133067 PUD d134063 PMD 80000000120001e3
Oops: 0011 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 18893 Comm: syz-executor.3 Not tainted 6.5.0-syzkaller-12107-g7ba2090ca64e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023
RIP: 0010:bfs_fill_super.__key+0x0/0x20
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc9000e3475b8 EFLAGS: 00010246
RAX: 1ffff1100509bb1b RBX: ffff8880284dd8d8 RCX: 0000000000040000
RDX: ffffc9000b7b9000 RSI: 0000000000000003 RDI: ffff888085c881e8
RBP: ffffc9000e347750 R08: 0000000000000005 R09: ffffffff822de8cf
R10: 0000000000000003 R11: ffff888036fd5940 R12: ffff8880344dc628
R13: dffffc0000000000 R14: 0000000000000003 R15: ffffc9000e3476c0
FS: 00007fc17a1456c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff92030d80 CR3: 0000000029080000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
reiserfs_lookup+0x1e2/0x580 fs/reiserfs/namei.c:368
lookup_open fs/namei.c:3473 [inline]
open_last_lookups fs/namei.c:3563 [inline]
path_openat+0x11f1/0x3180 fs/namei.c:3793
do_filp_open+0x234/0x490 fs/namei.c:3823
do_sys_openat2+0x13e/0x1d0 fs/open.c:1422
do_sys_open fs/open.c:1437 [inline]
__do_sys_open fs/open.c:1445 [inline]
__se_sys_open fs/open.c:1441 [inline]
__x64_sys_open+0x225/0x270 fs/open.c:1441
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fc17947cae9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc17a1450c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 00007fc17959bf80 RCX: 00007fc17947cae9
RDX: 0000000000000000 RSI: 000000000014d242 RDI: 0000000020000140
RBP: 00007fc1794c847a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fc17959bf80 R15: 00007ffdcad2abc8
</TASK>
Modules linked in:
CR2: ffffffff92030d80
---[ end trace 0000000000000000 ]---
RIP: 0010:bfs_fill_super.__key+0x0/0x20
Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
RSP: 0018:ffffc9000e3475b8 EFLAGS: 00010246
RAX: 1ffff1100509bb1b RBX: ffff8880284dd8d8 RCX: 0000000000040000
RDX: ffffc9000b7b9000 RSI: 0000000000000003 RDI: ffff888085c881e8
RBP: ffffc9000e347750 R08: 0000000000000005 R09: ffffffff822de8cf
R10: 0000000000000003 R11: ffff888036fd5940 R12: ffff8880344dc628
R13: dffffc0000000000 R14: 0000000000000003 R15: ffffc9000e3476c0
FS: 00007fc17a1456c0(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffff92030d80 CR3: 0000000029080000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.