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 C66451A5BBC; Tue, 26 Aug 2025 12:58:57 +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=1756213137; cv=none; b=Idfc/CjRLJISDwJHwQ0npGOtqd+hsps77P7rnwwescsiGygNDP14xG9IMfEvrTPqnGU6Af9pUVKUb6YCu8tVxWKOzlchIGYiHOUXO7XE2fjG45YUC1PIcBH0SjMFf/JXJ6aWW9VOuyLaW6Z45EXpz7Vq9Kbo2bwqy9F/WamXjBY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756213137; c=relaxed/simple; bh=tPJbIhB/0FUUDWpXX2Q4Ib0rIjAcHjH51E/VqPwokBA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Ubllqi//ppmFHXVr8fTSRbLaDh40wlnyxCXxLmE4mL3mwCi2Cgggq71U8mogKuODgwDaqzwX4fzflEfWvEzvyTEhEo07EaPHYhtgYxnQ1udtIZajHPvUUF6nERVoSQ7K4ubN/jLDSF+jmF4VvztP/ic5a8m92tidTx+yLORPaa0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=jo3Ld28u; 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="jo3Ld28u" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C078C4CEF1; Tue, 26 Aug 2025 12:58:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756213137; bh=tPJbIhB/0FUUDWpXX2Q4Ib0rIjAcHjH51E/VqPwokBA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=jo3Ld28uR+mIlEhS5TDSOhnw4jd79s0VRAgN+zacnraXEbEIqYKKD6lQVdQU1a1a+ qU7D/TiUij3FIbGA0MAeoftJUyYmSlYh1ya6kFFJtN1/JfE3RfXfuS5vxR2EATUEvk rK7Q9DbjzdzTJb0ZHn2VZjNr+wvjRqpFXctDkD4U= 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 6.6 236/587] jfs: Regular file corruption check Date: Tue, 26 Aug 2025 13:06:25 +0200 Message-ID: <20250826110958.937624776@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110952.942403671@linuxfoundation.org> References: <20250826110952.942403671@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 6.6-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 01b6912e60f8..742cadd1f37e 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