From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B61CC346AD6 for ; Mon, 13 Apr 2026 12:14:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776082448; cv=none; b=bWeFuLr6nFCu3bQFn6j2rmvaVn9A+tEoLuKdBysGYwFs3Hn06qLpJS7yy7EBjaMt1WFUeW8+GSJkxFlaoYH7o+59JTWVJ0MBxWM+hKMO7Uo7Gu+6+zk+arx/SCa4u1cR6yNDeO9P9vcoiB1m0speuegdvbpVrOxF2s4xUPeT8Bc= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776082448; c=relaxed/simple; bh=EhGtZ2OzZ3lbYmWncGl4CxINuCWJdamFYD/qvgwn71w=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=b9JYVHDUtJ5JLYBEqf/pNpHeKpgfhp8PKBGceiHGuGtdoqwf3InraqtAH0c3kSVSHP5n4es6/Qw+U07F9xck4+gY8rygK02cv/1FFQSGqcDsjKANoE7ChUZyi5rE2Rdde7f4dFj9N6rIFr8qcTYLf7zFHNI2XZT1p4tExFDi1SI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=A17ATxDu; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="A17ATxDu" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4C0DAC116C6; Mon, 13 Apr 2026 12:14:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1776082448; bh=EhGtZ2OzZ3lbYmWncGl4CxINuCWJdamFYD/qvgwn71w=; h=Subject:To:Cc:From:Date:From; b=A17ATxDucrBIMfwAOtiB61gsQz5R/cgDw1+jCkUUJI33Woq3Bq9jXmMWVPcpL8xn5 nQP7oLh7wpuwk1yIuWUWEFMF7EmJwbJF8+9nqJKzsrFJralwoqJ2X2cWeYjEL8g1Dm btjt5BQj0id1ExIOUTIqpbAVLyP7+zLDw9eQVehM= Subject: FAILED: patch "[PATCH] ocfs2: fix out-of-bounds write in ocfs2_write_end_inline" failed to apply to 5.15-stable tree To: joseph.qi@linux.alibaba.com,akpm@linux-foundation.org,gechangwei@live.cn,heming.zhao@suse.com,jlbec@evilplan.org,junxiao.bi@oracle.com,mark@fasheh.com,piaojun@huawei.com,stable@vger.kernel.org Cc: From: Date: Mon, 13 Apr 2026 14:13:53 +0200 Message-ID: <2026041353-swimmer-skied-a346@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.15-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.15.y git checkout FETCH_HEAD git cherry-pick -x 7bc5da4842bed3252d26e742213741a4d0ac1b14 # git commit -s git send-email --to '' --in-reply-to '2026041353-swimmer-skied-a346@gregkh' --subject-prefix 'PATCH 5.15.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 7bc5da4842bed3252d26e742213741a4d0ac1b14 Mon Sep 17 00:00:00 2001 From: Joseph Qi Date: Fri, 3 Apr 2026 14:38:30 +0800 Subject: [PATCH] ocfs2: fix out-of-bounds write in ocfs2_write_end_inline KASAN reports a use-after-free write of 4086 bytes in ocfs2_write_end_inline, called from ocfs2_write_end_nolock during a copy_file_range splice fallback on a corrupted ocfs2 filesystem mounted on a loop device. The actual bug is an out-of-bounds write past the inode block buffer, not a true use-after-free. The write overflows into an adjacent freed page, which KASAN reports as UAF. The root cause is that ocfs2_try_to_write_inline_data trusts the on-disk id_count field to determine whether a write fits in inline data. On a corrupted filesystem, id_count can exceed the physical maximum inline data capacity, causing writes to overflow the inode block buffer. Call trace (crash path): vfs_copy_file_range (fs/read_write.c:1634) do_splice_direct splice_direct_to_actor iter_file_splice_write ocfs2_file_write_iter generic_perform_write ocfs2_write_end ocfs2_write_end_nolock (fs/ocfs2/aops.c:1949) ocfs2_write_end_inline (fs/ocfs2/aops.c:1915) memcpy_from_folio <-- KASAN: write OOB So add id_count upper bound check in ocfs2_validate_inode_block() to alongside the existing i_size check to fix it. Link: https://lkml.kernel.org/r/20260403063830.3662739-1-joseph.qi@linux.alibaba.com Signed-off-by: Joseph Qi Reported-by: syzbot+62c1793956716ea8b28a@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=62c1793956716ea8b28a Cc: Mark Fasheh Cc: Joel Becker Cc: Junxiao Bi Cc: Changwei Ge Cc: Jun Piao Cc: Heming Zhao Cc: Signed-off-by: Andrew Morton diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c index 03a51662ea8e..a2ccd8011706 100644 --- a/fs/ocfs2/inode.c +++ b/fs/ocfs2/inode.c @@ -1505,6 +1505,16 @@ int ocfs2_validate_inode_block(struct super_block *sb, goto bail; } + if (le16_to_cpu(data->id_count) > + ocfs2_max_inline_data_with_xattr(sb, di)) { + rc = ocfs2_error(sb, + "Invalid dinode #%llu: inline data id_count %u exceeds max %d\n", + (unsigned long long)bh->b_blocknr, + le16_to_cpu(data->id_count), + ocfs2_max_inline_data_with_xattr(sb, di)); + goto bail; + } + if (le64_to_cpu(di->i_size) > le16_to_cpu(data->id_count)) { rc = ocfs2_error(sb, "Invalid dinode #%llu: inline data i_size %llu exceeds id_count %u\n",