syzbot


kernel BUG in ocfs2_group_extend

Status: upstream: reported on 2024/10/28 16:23
Subsystems: ocfs2
[Documentation on labels]
Reported-by: syzbot+ce0c7bd35d4b7c7300cd@syzkaller.appspotmail.com
First crash: 43d, last: 10d
Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [ocfs2?] kernel BUG in ocfs2_group_extend 0 (1) 2024/10/28 16:23

Sample crash report:
loop0: detected capacity change from 0 to 32768
=======================================================
WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
loop0: detected capacity change from 32768 to 0
syz.0.0: attempt to access beyond end of device
loop0: rw=0, sector=10576, nr_sectors = 1 limit=0
(syz.0.0,5335,0):__ocfs2_xattr_set_value_outside:1385 ERROR: status = -5
(syz.0.0,5335,0):ocfs2_xa_set:2260 ERROR: status = -5
syz.0.0: attempt to access beyond end of device
loop0: rw=0, sector=10576, nr_sectors = 1 limit=0
(syz.0.0,5335,0):__ocfs2_xattr_set_value_outside:1385 ERROR: status = -5
(syz.0.0,5335,0):ocfs2_xa_set:2260 ERROR: status = -5
loop0: detected capacity change from 0 to 32639
------------[ cut here ]------------
kernel BUG at fs/ocfs2/resize.c:308!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted 6.12.0-syzkaller-09567-g7eef7e306d3c #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_group_extend+0xb28/0xb30 fs/ocfs2/resize.c:308
Code: ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 30 f9 ff ff 4c 89 ff e8 e8 69 69 fe e9 23 f9 ff ff e8 4e c1 3a 08 e8 09 82 fe fd 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d3afb20 EFLAGS: 00010283
RAX: ffffffff83975b17 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000e762000 RSI: 0000000000000591 RDI: 0000000000000592
RBP: ffffc9000d3afcf0 R08: ffffffff839752a3 R09: 1ffffffff203c736
R10: dffffc0000000000 R11: fffffbfff203c737 R12: ffff888052ca4fb8
R13: dffffc0000000000 R14: 1ffff92001a75f74 R15: ffff88803f851e00
FS:  00007f970fa536c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f97037ff000 CR3: 0000000044234000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 ocfs2_ioctl+0x771/0x7d0 fs/ocfs2/ioctl.c:873
 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: 0033:0x7f970eb7e919
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:00007f970fa53038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f970ed35fa0 RCX: 00007f970eb7e919
RDX: 00000000200000c0 RSI: 0000000040046f01 RDI: 0000000000000008
RBP: 00007f970ebf197e R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f970ed35fa0 R15: 00007fffb6a33cd8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:ocfs2_group_extend+0xb28/0xb30 fs/ocfs2/resize.c:308
Code: ff ff 44 89 f9 80 e1 07 fe c1 38 c1 0f 8c 30 f9 ff ff 4c 89 ff e8 e8 69 69 fe e9 23 f9 ff ff e8 4e c1 3a 08 e8 09 82 fe fd 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90
RSP: 0018:ffffc9000d3afb20 EFLAGS: 00010283
RAX: ffffffff83975b17 RBX: 00000000ffffffff RCX: 0000000000100000
RDX: ffffc9000e762000 RSI: 0000000000000591 RDI: 0000000000000592
RBP: ffffc9000d3afcf0 R08: ffffffff839752a3 R09: 1ffffffff203c736
R10: dffffc0000000000 R11: fffffbfff203c737 R12: ffff888052ca4fb8
R13: dffffc0000000000 R14: 1ffff92001a75f74 R15: ffff88803f851e00
FS:  00007f970fa536c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f970fa31fe0 CR3: 0000000044234000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/11/26 19:39 upstream 7eef7e306d3c e9a9a9f2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_group_extend
2024/10/24 16:12 upstream c2ee9f594da8 c08e46d6 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel BUG in ocfs2_group_extend
* Struck through repros no longer work on HEAD.