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AJvYcCXW42LVffJyEw+p4Te4xzfzeITsBW3vjIsJmPl5Wc84m0Dmj9gqzMiF9T0hrr6jJauIzMNDgRWiDI6zKQU=@vger.kernel.org X-Gm-Message-State: AOJu0YzhAogFC3qG043hwRZbImrIqf2siCo6AVdExhMJJeRBVvv5gUnl 0e14FoZl44owhQGB/CLLhCmyBot6DJZerIBVBwMQH48Yqqc//FihQYetuIwCjal5wDGf5nHXeXA ac/axTx7u2S3l0QMZYl+orCucCpCygs+AIQo4Nltq92wcOnC2Gi/ElOb15Ng= X-Google-Smtp-Source: AGHT+IEmgVf+Fl6Do0mxfv1Qpm3U7SOdnWocUThAOoIUtE2ynxcuEQXfbhYJljDYIJSYm9gnsATPFXcTCiYO5TH5oTS9q3eO02vH Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6820:180f:b0:659:9a49:8f94 with SMTP id 006d021491bc7-65b2abc1776mr3075999eaf.13.1765434142736; Wed, 10 Dec 2025 22:22:22 -0800 (PST) Date: Wed, 10 Dec 2025 22:22:22 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <693a631e.a70a0220.33cd7b.0027.GAE@google.com> Subject: [syzbot] [ocfs2?] UBSAN: array-index-out-of-bounds in ocfs2_xa_remove_entry From: syzbot To: jlbec@evilplan.org, joseph.qi@linux.alibaba.com, linux-kernel@vger.kernel.org, mark@fasheh.com, ocfs2-devel@lists.linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: c2f2b01b74be Merge tag 'i3c/for-6.19' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11a4eeb4580000 kernel config: https://syzkaller.appspot.com/x/.config?x=cf15a4b50e1152e3 dashboard link: https://syzkaller.appspot.com/bug?extid=cf96bc82a588a27346a8 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=16e89992580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15a4eeb4580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-c2f2b01b.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/753c2b596a8a/vmlinux-c2f2b01b.xz kernel image: https://storage.googleapis.com/syzbot-assets/9e3ad31aad53/bzImage-c2f2b01b.xz mounted in repro #1: https://storage.googleapis.com/syzbot-assets/befacb04d20d/mount_0.gz fsck result: OK (log: https://syzkaller.appspot.com/x/fsck.log?x=12e89992580000) mounted in repro #2: https://storage.googleapis.com/syzbot-assets/08da0e96bc06/mount_4.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+cf96bc82a588a27346a8@syzkaller.appspotmail.com ======================================================= JBD2: Ignoring recovery information on journal ocfs2: Mounting device (7,0) on (node local, slot 0) with ordered data mode. ------------[ cut here ]------------ UBSAN: array-index-out-of-bounds in fs/ocfs2/xattr.c:1955:3 index 2 is out of range for type 'struct ocfs2_xattr_entry[] __counted_by(xh_count)' (aka 'struct ocfs2_xattr_entry[]') CPU: 0 UID: 0 PID: 5508 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 ubsan_epilogue+0xa/0x40 lib/ubsan.c:233 __ubsan_handle_out_of_bounds+0xe9/0xf0 lib/ubsan.c:455 ocfs2_xa_remove_entry+0x36d/0x3e0 fs/ocfs2/xattr.c:1955 ocfs2_xa_remove fs/ocfs2/xattr.c:2043 [inline] ocfs2_xa_set+0xaf4/0x2a70 fs/ocfs2/xattr.c:2247 ocfs2_xattr_block_set+0x3ca/0x31b0 fs/ocfs2/xattr.c:2985 __ocfs2_xattr_set_handle+0x27e/0xf20 fs/ocfs2/xattr.c:-1 ocfs2_xattr_set+0xde8/0x11f0 fs/ocfs2/xattr.c:3650 __vfs_removexattr+0x431/0x470 fs/xattr.c:518 __vfs_removexattr_locked+0x1e8/0x230 fs/xattr.c:553 vfs_removexattr+0x80/0x1b0 fs/xattr.c:575 removexattr fs/xattr.c:1023 [inline] filename_removexattr fs/xattr.c:1052 [inline] path_removexattrat+0x35d/0x690 fs/xattr.c:1088 __do_sys_lremovexattr fs/xattr.c:1106 [inline] __se_sys_lremovexattr fs/xattr.c:1103 [inline] __x64_sys_lremovexattr+0x65/0x80 fs/xattr.c:1103 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f65fcd8f7c9 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:00007ffc4fa4bdb8 EFLAGS: 00000246 ORIG_RAX: 00000000000000c6 RAX: ffffffffffffffda RBX: 00007f65fcfe5fa0 RCX: 00007f65fcd8f7c9 RDX: 0000000000000000 RSI: 0000200000000280 RDI: 0000200000000240 RBP: 00007f65fce13f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f65fcfe5fa0 R14: 00007f65fcfe5fa0 R15: 0000000000000002 ---[ end trace ]--- --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup