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Date:   Wed, 22 Nov 2023 07:43:24 -0800
Message-ID: <0000000000005c72b5060abf946a@google.com>
Subject: [syzbot] [reiserfs?] kernel BUG in entry_points_to_object
From:   syzbot <syzbot+927b0cd57b86eedb4193@syzkaller.appspotmail.com>
To:     linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
        paul@paul-moore.com, reiserfs-devel@vger.kernel.org,
        roberto.sassu@huawei.com, syzkaller-bugs@googlegroups.com
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Hello,

syzbot found the following issue on:

HEAD commit:    98b1cc82c4af Linux 6.7-rc2
git tree:       upstream
console+strace: https://syzkaller.appspot.com/x/log.txt?x=17f637b7680000
kernel config:  https://syzkaller.appspot.com/x/.config?x=52c9552def2a0fdd
dashboard link: https://syzkaller.appspot.com/bug?extid=927b0cd57b86eedb4193
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=101b9214e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12fb7214e80000

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/77af735993e1/disk-98b1cc82.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/806c51c6c6ae/vmlinux-98b1cc82.xz
kernel image: https://storage.googleapis.com/syzbot-assets/9af67744e298/bzImage-98b1cc82.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/7d091cb75f24/mount_0.gz

The issue was bisected to:

commit d82dcd9e21b77d338dc4875f3d4111f0db314a7c
Author: Roberto Sassu <roberto.sassu@huawei.com>
Date:   Fri Mar 31 12:32:18 2023 +0000

    reiserfs: Add security prefix to xattr name in reiserfs_security_write()

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17989114e80000
final oops:     https://syzkaller.appspot.com/x/report.txt?x=14589114e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=10589114e80000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+927b0cd57b86eedb4193@syzkaller.appspotmail.com
Fixes: d82dcd9e21b7 ("reiserfs: Add security prefix to xattr name in reiserfs_security_write()")

REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 1) not found (pos 2)
REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 SD] (nlink == 1) not found (pos 2)
REISERFS panic (device loop0): vs-7042 entry_points_to_object: entry must be visible
------------[ cut here ]------------
kernel BUG at fs/reiserfs/prints.c:390!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 5057 Comm: syz-executor309 Not tainted 6.7.0-rc2-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:__reiserfs_panic+0x140/0x150 fs/reiserfs/prints.c:390
Code: c1 a0 69 7c 8b 48 0f 44 c8 48 0f 44 d8 48 c7 c7 60 6a 7c 8b 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 80 53 6f 92 e8 71 21 de 08 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 55 48
RSP: 0018:ffffc9000391f320 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffffffff8b7c1b00 RCX: bc3f3e0b1fc0be00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000391f410 R08: ffffffff817136dc R09: 1ffff92000723e04
R10: dffffc0000000000 R11: fffff52000723e05 R12: ffffffff8b7c1b20
R13: ffffc9000391f340 R14: ffffffff8d13e152 R15: ffff88801cee8660
FS:  0000555555e10380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c020b77818 CR3: 0000000078e9b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 entry_points_to_object+0x6e7/0x6f0
 reiserfs_rename+0xff3/0x2110 fs/reiserfs/namei.c:1526
 vfs_rename+0xaba/0xde0 fs/namei.c:4844
 do_renameat2+0xd5a/0x1390 fs/namei.c:4996
 __do_sys_rename fs/namei.c:5042 [inline]
 __se_sys_rename fs/namei.c:5040 [inline]
 __x64_sys_rename+0x86/0x90 fs/namei.c:5040
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x45/0x110 arch/x86/entry/common.c:82
 entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f695d1e66b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fff86426978 EFLAGS: 00000246 ORIG_RAX: 0000000000000052
RAX: ffffffffffffffda RBX: 0032656c69662f2e RCX: 00007f695d1e66b9
RDX: 00007f695d1e66b9 RSI: 00000000200002c0 RDI: 00000000200000c0
RBP: 0030656c69662f31 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 2f31656c69662f2e
R13: 00007fff86426b58 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__reiserfs_panic+0x140/0x150 fs/reiserfs/prints.c:390
Code: c1 a0 69 7c 8b 48 0f 44 c8 48 0f 44 d8 48 c7 c7 60 6a 7c 8b 4c 89 fe 48 89 da 4d 89 f0 49 c7 c1 80 53 6f 92 e8 71 21 de 08 90 <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 55 48
RSP: 0018:ffffc9000391f320 EFLAGS: 00010246
RAX: 0000000000000054 RBX: ffffffff8b7c1b00 RCX: bc3f3e0b1fc0be00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc9000391f410 R08: ffffffff817136dc R09: 1ffff92000723e04
R10: dffffc0000000000 R11: fffff52000723e05 R12: ffffffff8b7c1b20
R13: ffffc9000391f340 R14: ffffffff8d13e152 R15: ffff88801cee8660
FS:  0000555555e10380(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c020b77818 CR3: 0000000078e9b000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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