From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f198.google.com (mail-il1-f198.google.com [209.85.166.198]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EF73D16EB42 for ; Tue, 11 Nov 2025 06:02:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.198 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762840924; cv=none; b=Mod1w1978qG/xmbKeuqYALMMPP7f2oSN8XmXt1sKmcAAy1a4Y6t6tztNJQdCf7cu5PlO5pRl1yc/9zianauNzIlei3pnOBmAu2qvnXkJtT6EL/KMteza270OZsd91/kjBw8x9jQcyus65xS1jU8mMKnHvPHh0QypFxwPbLB0iQY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1762840924; c=relaxed/simple; bh=I21XCKpynDsSOtEYjkjSZrJKz0++tPQI2/53zFx76lc=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=WfEg6wzrsEitiJ0wPhRlA6cp4FpflEox9Z/fUd0JmMY8bN/4n0GPVmq4PpU4aM51PXnuWsXSnRSuvrTOsy/GbtPVHgBoa07VvL499zhbLqszWOCVlV/HwjgLlNhcKJ2oIeujCePqI1hw1WTjpz/7N/1tKBCEwPCWnfGs4c8clQE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.198 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f198.google.com with SMTP id e9e14a558f8ab-4337e902d2bso19982375ab.3 for ; Mon, 10 Nov 2025 22:02:02 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1762840922; x=1763445722; h=to:from:subject:message-id:in-reply-to:date:mime-version :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=yBGZCy4jidFkA+nke8uw3qmxra/k4bxDc1sFkG0E/Fo=; b=hC353Jdb8N60nC3W5tNPqmP/lUTkEghyU5O7jy9+b/IjwHyJ+5LDfosnoTTP8v8fPL qf+EXYBeoET2ILIipqIG8K8pvupkpLSJX/d/tJmryg9x9LGSdjN75TFxwnwvHNB3w5dc Mf0AVyRgK3n/bJxu3KXYh2iy6LesiKmNmLiztsM/S+QZL4VB7ldglHFtYbiq/kKWoSN3 UAMnLQzZcv9mwzVpXAOQr4eSlkuV7uq15KsizI2hGQZX2cs/Z6gj3r2cXebkZx7hcea9 E0V7MOotTq40hA2Eh6340bIe29O5IN8pmY1vpYQFG/njESADldqIsKsPAphSVDds1Dzq IMzg== X-Forwarded-Encrypted: i=1; AJvYcCV+BbjwJl4DkP+Set+JAuUhx14IV3ooVn6UdQKGqkWrvD13Vsc9jnmq+FHXXeNKbQ0XEkRmYZ9QhLM/MyA=@vger.kernel.org X-Gm-Message-State: AOJu0Yycxh/4zlTbz4fVYmi7HXYLT97tnar8NQ7WhajZ70OnfYmmSCKQ u/ecDs5QEV5pbiP6nTfdboDNnT8ALaWlzIkLzJIJ9ZzQueXpqwZFGSe3cyieMEzOGFrCTUK24dA TbejDNyUDZP5qwNv/MCcIW1aUcCGGNs6aY5QExkNXSkAH2IIQWabTklxcLRw= X-Google-Smtp-Source: AGHT+IGUxunPALgsXL+nXAcuSe1FhhTbhOR3pgWENJbM3q6TjDEgfAtwnrI0/QI+SeXn4b4/kS4ZevRM3lHYZiRT08G7DtjCQPVQ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:1a0c:b0:42e:72ee:cde6 with SMTP id e9e14a558f8ab-43367dead04mr167837075ab.12.1762840922123; Mon, 10 Nov 2025 22:02:02 -0800 (PST) Date: Mon, 10 Nov 2025 22:02:02 -0800 In-Reply-To: <20251111044000.2016410-1-kartikey406@gmail.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6912d15a.a70a0220.22f260.0129.GAE@google.com> Subject: Re: [syzbot] [ocfs2?] KASAN: use-after-free Read in ocfs2_listxattr From: syzbot To: kartikey406@gmail.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot has tested the proposed patch but the reproducer is still triggering an issue: KASAN: use-after-free Read in ocfs2_listxattr On-disk corruption discovered. Please run fsck.ocfs2 once the filesystem is unmounted. OCFS2: File system is now read-only. ================================================================== BUG: KASAN: use-after-free in ocfs2_xattr_get_type fs/ocfs2/ocfs2_fs.h:1114 [inline] BUG: KASAN: use-after-free in ocfs2_xattr_list_entries fs/ocfs2/xattr.c:934 [inline] BUG: KASAN: use-after-free in ocfs2_xattr_ibody_list fs/ocfs2/xattr.c:982 [inline] BUG: KASAN: use-after-free in ocfs2_listxattr+0x408/0xa74 fs/ocfs2/xattr.c:1044 Read of size 1 at addr ffff0000e76a4007 by task syz.0.20/7236 CPU: 1 UID: 0 PID: 7236 Comm: syz.0.20 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378 ocfs2_xattr_get_type fs/ocfs2/ocfs2_fs.h:1114 [inline] ocfs2_xattr_list_entries fs/ocfs2/xattr.c:934 [inline] ocfs2_xattr_ibody_list fs/ocfs2/xattr.c:982 [inline] ocfs2_listxattr+0x408/0xa74 fs/ocfs2/xattr.c:1044 vfs_listxattr+0xc0/0x128 fs/xattr.c:493 ovl_listxattr+0xd8/0x49c fs/overlayfs/xattrs.c:123 vfs_listxattr fs/xattr.c:493 [inline] listxattr+0x10c/0x380 fs/xattr.c:924 filename_listxattr fs/xattr.c:958 [inline] path_listxattrat+0x15c/0x33c fs/xattr.c:988 __do_sys_listxattr fs/xattr.c:1001 [inline] __se_sys_listxattr fs/xattr.c:998 [inline] __arm64_sys_listxattr+0x84/0x98 fs/xattr.c:998 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:746 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:765 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to the physical page: page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffffb9581 pfn:0x1276a4 flags: 0x5ffc00000000000(node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000000000 fffffdffc3a50548 fffffdffc39dab88 0000000000000000 raw: 0000000ffffb9581 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000e76a3f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff0000e76a3f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000e76a4000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ^ ffff0000e76a4080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff0000e76a4100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ================================================================== Tested on: commit: e424ed99 Merge remote-tracking branch 'will/for-next/p.. git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=12f30658580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b8b659f0cab27b22 dashboard link: https://syzkaller.appspot.com/bug?extid=ab0ad25088673470d2d9 compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8 userspace arch: arm64 patch: https://syzkaller.appspot.com/x/patch.diff?x=1566f17c580000