linux-kernel - Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_set_new_buffer

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Message-ID: <676e919c.050a0220.226966.0097.GAE@google.com>
Date: Fri, 27 Dec 2024 03:38:04 -0800
From: syzbot <syzbot+7aef76bdb53b83d62a9e@...kaller.appspotmail.com>
To: dmantipov@...dex.ru, linux-kernel@...r.kernel.org, 
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [ocfs2?] kernel BUG in ocfs2_set_new_buffer_uptodate (2)

Hello,

syzbot has tested the proposed patch but the reproducer is still triggering an issue:
kernel BUG in ocfs2_set_new_buffer_uptodate

------------[ cut here ]------------
kernel BUG at fs/ocfs2/uptodate.c:509!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 0 UID: 0 PID: 10858 Comm: syz.3.713 Not tainted 6.13.0-rc4-syzkaller-00054-gd6ef8b40d075-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:ocfs2_set_new_buffer_uptodate+0x145/0x160 fs/ocfs2/uptodate.c:509
Code: 03 42 80 3c 20 00 74 08 48 89 df e8 65 ae 63 fe 4c 8b 1b 4c 89 ff 5b 41 5c 41 5d 41 5e 41 5f 41 ff e3 cc 90 e8 ac d1 ff fd 90 <0f> 0b e8 a4 d1 ff fd 90 0f 0b e8 9c d1 ff fd 90 0f 0b e8 94 d1 ff
RSP: 0018:ffffc9000c947a30 EFLAGS: 00010293
RAX: ffffffff839fa234 RBX: 0000000000000001 RCX: ffff888030438000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000c947cf0 R08: ffffffff839fa11e R09: 1ffffffff2030a4e
R10: dffffc0000000000 R11: fffffbfff2030a4f R12: ffff8880586616b8
R13: dffffc0000000000 R14: ffff88805b8eaae0 R15: ffff88805b9f8830
FS:  00007fd029a316c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9b947f000 CR3: 00000000283fa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_group_add+0x3a3/0x15a0 fs/ocfs2/resize.c:507
 ocfs2_ioctl+0x65e/0x7d0 fs/ocfs2/ioctl.c:891
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892
 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: 0033:0x7fd028b85d29
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:00007fd029a31038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fd028d76080 RCX: 00007fd028b85d29
RDX: 00000000200000c0 RSI: 0000000040186f02 RDI: 0000000000000004
RBP: 00007fd028c01b08 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fd028d76080 R15: 00007ffd6ac0c628
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_set_new_buffer_uptodate+0x145/0x160 fs/ocfs2/uptodate.c:509
Code: 03 42 80 3c 20 00 74 08 48 89 df e8 65 ae 63 fe 4c 8b 1b 4c 89 ff 5b 41 5c 41 5d 41 5e 41 5f 41 ff e3 cc 90 e8 ac d1 ff fd 90 <0f> 0b e8 a4 d1 ff fd 90 0f 0b e8 9c d1 ff fd 90 0f 0b e8 94 d1 ff
RSP: 0018:ffffc9000c947a30 EFLAGS: 00010293
RAX: ffffffff839fa234 RBX: 0000000000000001 RCX: ffff888030438000
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000
RBP: ffffc9000c947cf0 R08: ffffffff839fa11e R09: 1ffffffff2030a4e
R10: dffffc0000000000 R11: fffffbfff2030a4f R12: ffff8880586616b8
R13: dffffc0000000000 R14: ffff88805b8eaae0 R15: ffff88805b9f8830
FS:  00007fd029a316c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe9ba1ff000 CR3: 00000000283fa000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


Tested on:

commit:         d6ef8b40 Merge tag 'sound-6.13-rc5' of git://git.kerne..
git tree:       https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
console output: https://syzkaller.appspot.com/x/log.txt?x=1319d90f980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=4c4096b0d467a682
dashboard link: https://syzkaller.appspot.com/bug?extid=7aef76bdb53b83d62a9e
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1520badf980000