Message-ID: <66f85dc9.050a0220.aab67.0007.GAE@google.com>
Date: Sat, 28 Sep 2024 12:49:29 -0700
From: syzbot <syzbot+e1e7130b99d8a4ac02e4@...kaller.appspotmail.com>
To: jlbec@...lplan.org, joseph.qi@...ux.alibaba.com, 
	linux-kernel@...r.kernel.org, mark@...heh.com, ocfs2-devel@...ts.linux.dev, 
	syzkaller-bugs@...glegroups.com
Subject: [syzbot] [ocfs2?] kernel BUG in ocfs2_truncate_log_needs_flush

Hello,

syzbot found the following issue on:

HEAD commit:    abf2050f51fd Merge tag 'media/v6.12-1' of git://git.kernel..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=10f9b107980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=bc30a30374b0753
dashboard link: https://syzkaller.appspot.com/bug?extid=e1e7130b99d8a4ac02e4
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

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

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-abf2050f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/2179ebeade58/vmlinux-abf2050f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/f05289b5cf7c/bzImage-abf2050f.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e1e7130b99d8a4ac02e4@...kaller.appspotmail.com

(syz.0.0,5112,0):ocfs2_truncate_log_needs_flush:5822 ERROR: bug expression: le16_to_cpu(tl->tl_used) > le16_to_cpu(tl->tl_count)
(syz.0.0,5112,0):ocfs2_truncate_log_needs_flush:5822 ERROR: slot 0, invalid truncate log parameters: used = 64512, count = 39
------------[ cut here ]------------
kernel BUG at fs/ocfs2/alloc.c:5822!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5112 Comm: syz.0.0 Not tainted 6.11.0-syzkaller-09959-gabf2050f51fd #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:ocfs2_truncate_log_needs_flush+0x312/0x320 fs/ocfs2/alloc.c:5819
Code: 0f b7 00 4c 89 f7 48 c7 c6 42 42 11 8e ba be 16 00 00 48 c7 c1 60 0a 49 8c 45 89 e0 41 89 d9 50 e8 d3 aa 20 00 48 83 c4 08 90 <0f> 0b e8 c7 30 41 08 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003727540 EFLAGS: 00010292
RAX: 72ffad2bcd159b00 RBX: 000000000000fc00 RCX: 72ffad2bcd159b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003727610 R08: ffffffff81746c8c R09: 1ffff920006e4e18
R10: dffffc0000000000 R11: fffff520006e4e19 R12: 0000000000000000
R13: ffff888000503ac2 R14: ffffc900037275a0 R15: 1000000000000000
FS:  00007f582a3f36c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f582a3f2f98 CR3: 000000003f8ac000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_xattr_set+0xeab/0x1930 fs/ocfs2/xattr.c:3625
 __vfs_setxattr+0x468/0x4a0 fs/xattr.c:200
 __vfs_setxattr_noperm+0x12e/0x660 fs/xattr.c:234
 vfs_setxattr+0x221/0x430 fs/xattr.c:321
 do_setxattr fs/xattr.c:629 [inline]
 path_setxattr+0x37e/0x4d0 fs/xattr.c:658
 __do_sys_setxattr fs/xattr.c:676 [inline]
 __se_sys_setxattr fs/xattr.c:672 [inline]
 __x64_sys_setxattr+0xbb/0xd0 fs/xattr.c:672
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f582957def9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f582a3f3038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
RAX: ffffffffffffffda RBX: 00007f5829736058 RCX: 00007f582957def9
RDX: 00000000200013c0 RSI: 0000000020000140 RDI: 0000000020000100
RBP: 00007f58295f0b76 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000700 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007f5829736058 R15: 00007ffca764d158
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_truncate_log_needs_flush+0x312/0x320 fs/ocfs2/alloc.c:5819
Code: 0f b7 00 4c 89 f7 48 c7 c6 42 42 11 8e ba be 16 00 00 48 c7 c1 60 0a 49 8c 45 89 e0 41 89 d9 50 e8 d3 aa 20 00 48 83 c4 08 90 <0f> 0b e8 c7 30 41 08 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90
RSP: 0018:ffffc90003727540 EFLAGS: 00010292
RAX: 72ffad2bcd159b00 RBX: 000000000000fc00 RCX: 72ffad2bcd159b00
RDX: 0000000000000000 RSI: 0000000080000000 RDI: 0000000000000000
RBP: ffffc90003727610 R08: ffffffff81746c8c R09: 1ffff920006e4e18
R10: dffffc0000000000 R11: fffff520006e4e19 R12: 0000000000000000
R13: ffff888000503ac2 R14: ffffc900037275a0 R15: 1000000000000000
FS:  00007f582a3f36c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003f8ac000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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