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 B09DC3568E0; Tue, 26 Aug 2025 14:37:48 +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=1756219068; cv=none; b=dtrBii6usc65KGiFzl2GAPbz2Iwle20L6Z3adSeLjvon8lHkfSWzaRug3LL/wAh3u+/kBhJwLpJFR2NqDLXGtMK6MG7rEscrNAn6ZpXvEn/heMtMjquT5DpCjfBDkUugh+d+Mv5LZIKKjZX3U9v1BhyrWBueBpkk1Hn0W5b4wqU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756219068; c=relaxed/simple; bh=TqhwU8nQGzgG6K4ipZ8Yomhp+l0fJ/8QetLzD3kpNPU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dsbrI8KcteyaAERQ+HXe9sntXnPH3Yyhl1itgEnwp4RGDO/z4rvYLeb2vM82ItwVoTyDxkrtoE4ww8foNJ6Z4Nwuv2sIv42hCyAveLPDKKWgRI88hCP5XP4An9Y9JVaKV5K9gZdzUSmW9cI7tpf5qb166buz3tWHuTiGecRvem0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jn8+4+xs; 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="jn8+4+xs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCEF9C4CEF1; Tue, 26 Aug 2025 14:37:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756219068; bh=TqhwU8nQGzgG6K4ipZ8Yomhp+l0fJ/8QetLzD3kpNPU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jn8+4+xsTkomExRxTEVjxcgcXhwdAzayel0o+9I/zijJfWisj0jGfzRgSiVCCzTG7 /ggNDbc/8/RGRD9uQX1uKf2zhEm/xEPGdwpenD7wJMGulOoWOoc1DWDQB1CMZ33kUY DQLmwOO4dJr/MecvysS5TA28MEbl6Ue3FndSg1xU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, syzbot+630f6d40b3ccabc8e96e@syzkaller.appspotmail.com, Edward Adam Davis , Dave Kleikamp , Sasha Levin Subject: [PATCH 5.4 240/403] jfs: Regular file corruption check Date: Tue, 26 Aug 2025 13:09:26 +0200 Message-ID: <20250826110913.462403009@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110905.607690791@linuxfoundation.org> References: <20250826110905.607690791@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 5.4-stable review patch. If anyone has any objections, please let me know. ------------------ From: Edward Adam Davis [ Upstream commit 2d04df8116426b6c7b9f8b9b371250f666a2a2fb ] The reproducer builds a corrupted file on disk with a negative i_size value. Add a check when opening this file to avoid subsequent operation failures. Reported-by: syzbot+630f6d40b3ccabc8e96e@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=630f6d40b3ccabc8e96e Tested-by: syzbot+630f6d40b3ccabc8e96e@syzkaller.appspotmail.com Signed-off-by: Edward Adam Davis Signed-off-by: Dave Kleikamp Signed-off-by: Sasha Levin --- fs/jfs/file.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/fs/jfs/file.c b/fs/jfs/file.c index 930d2701f206..44872daeca01 100644 --- a/fs/jfs/file.c +++ b/fs/jfs/file.c @@ -44,6 +44,9 @@ static int jfs_open(struct inode *inode, struct file *file) { int rc; + if (S_ISREG(inode->i_mode) && inode->i_size < 0) + return -EIO; + if ((rc = dquot_file_open(inode, file))) return rc; -- 2.39.5