Message-ID: <000000000000560ff106204134d2@google.com>
Date: Thu, 22 Aug 2024 01:11:23 -0700
From: syzbot <syzbot+96d38c6e1655c1420a72@...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_claim_suballoc_bits

Hello,

syzbot found the following issue on:

HEAD commit:    872cf28b8df9 Merge tag 'platform-drivers-x86-v6.11-4' of g..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15e78c33980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=df2f0ed7e30a639d
dashboard link: https://syzkaller.appspot.com/bug?extid=96d38c6e1655c1420a72
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=1641940b980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17c6747b980000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-872cf28b.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/e42852893b68/vmlinux-872cf28b.xz
kernel image: https://storage.googleapis.com/syzbot-assets/99d0f54d6297/bzImage-872cf28b.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/7e59b3a54e83/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+96d38c6e1655c1420a72@...kaller.appspotmail.com

         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
------------[ cut here ]------------
kernel BUG at fs/ocfs2/suballoc.c:1441!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5092 Comm: syz-executor170 Not tainted 6.11.0-rc4-syzkaller-00033-g872cf28b8df9 #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_find_victim_chain fs/ocfs2/suballoc.c:1441 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x240c/0x2570 fs/ocfs2/suballoc.c:1982
Code: 0a 12 05 fe 90 0f 0b e8 02 12 05 fe 90 0f 0b e8 fa 11 05 fe 90 0f 0b e8 f2 11 05 fe 90 0f 0b e8 4a 40 28 08 e8 e5 11 05 fe 90 <0f> 0b e8 dd 11 05 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 9b 5d 75 7c bf
RSP: 0018:ffffc9000af36da0 EFLAGS: 00010293
RAX: ffffffff838e795b RBX: 0000000000000000 RCX: ffff88801c86c880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000af37050 R08: ffffffff838e6445 R09: 0000000000000000
R10: ffffc9000af370e0 R11: fffff520015e6e21 R12: dffffc0000000000
R13: ffff88805f022008 R14: ffff88803f268400 R15: 0000000000000002
FS:  000055558fd61380(0000) GS:ffff888020800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001d86c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_claim_new_inode+0x338/0x870 fs/ocfs2/suballoc.c:2267
 ocfs2_mknod_locked+0x17a/0x3b0 fs/ocfs2/namei.c:633
 ocfs2_mknod+0x17d4/0x2b40 fs/ocfs2/namei.c:379
 ocfs2_create+0x1ab/0x480 fs/ocfs2/namei.c:672
 lookup_open fs/namei.c:3578 [inline]
 open_last_lookups fs/namei.c:3647 [inline]
 path_openat+0x1a9a/0x3470 fs/namei.c:3883
 do_filp_open+0x235/0x490 fs/namei.c:3913
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1416
 do_sys_open fs/open.c:1431 [inline]
 __do_sys_openat fs/open.c:1447 [inline]
 __se_sys_openat fs/open.c:1442 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1442
 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: 0033:0x7f40f4c89c59
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 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:00007ffc3348c8c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f40f4c89c59
RDX: 0000000000040942 RSI: 0000000020000200 RDI: 00000000ffffff9c
RBP: 00007f40f4d015f0 R08: 000055558fd624c0 R09: 000055558fd624c0
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffc3348c8f0
R13: 00007ffc3348cb18 R14: 431bde82d7b634db R15: 00007f40f4cd203b
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_find_victim_chain fs/ocfs2/suballoc.c:1441 [inline]
RIP: 0010:ocfs2_claim_suballoc_bits+0x240c/0x2570 fs/ocfs2/suballoc.c:1982
Code: 0a 12 05 fe 90 0f 0b e8 02 12 05 fe 90 0f 0b e8 fa 11 05 fe 90 0f 0b e8 f2 11 05 fe 90 0f 0b e8 4a 40 28 08 e8 e5 11 05 fe 90 <0f> 0b e8 dd 11 05 fe 90 0f 0b f3 0f 1e fa 65 8b 1d 9b 5d 75 7c bf
RSP: 0018:ffffc9000af36da0 EFLAGS: 00010293
RAX: ffffffff838e795b RBX: 0000000000000000 RCX: ffff88801c86c880
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc9000af37050 R08: ffffffff838e6445 R09: 0000000000000000
R10: ffffc9000af370e0 R11: fffff520015e6e21 R12: dffffc0000000000
R13: ffff88805f022008 R14: ffff88803f268400 R15: 0000000000000002
FS:  000055558fd61380(0000) GS:ffff888020800000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000001d86c000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


---
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