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 CCE2424A066; Tue, 26 Aug 2025 13:24:11 +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=1756214651; cv=none; b=u5U962L4ungTz3iu3qmmn5X07SgEmb6u/d/ULNla3opqNJ/uKTmi397VfAG7YJ84rJSFxYojr3ZH6VZ7PoOxdQiHT2IpgSTrmZKjUclxcSFgARtrn0fJRMzFjR7hI00wj6pyuIkRkKCT4iZnzbvKoH9lwinvgiaCguQkuLfEz6k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1756214651; c=relaxed/simple; bh=J9nzJCqI6+pPpZniKhjHUswECYoU9SDpNosCkAAfrto=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=CGE2t+bI7RaF7G4NvrHZFV1jKWq2bBHfmkeU1VDLmOp4FH+BHEpUqaV4yVkQfyw9otYF0mzCiznDbchw6zXIhDP/UWaGwNRjJte/9ta0amW1JlVzSvO9394knc5iZqm4pzjL8Nw9tApR7tt6NkR15sZKmKMG1kmJSdpn83OOTjg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=AV4gT56t; 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="AV4gT56t" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5DFF3C4CEF1; Tue, 26 Aug 2025 13:24:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1756214651; bh=J9nzJCqI6+pPpZniKhjHUswECYoU9SDpNosCkAAfrto=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AV4gT56tA106oRPgi91/+u1FmqL2SW6fCIJ6iHTOueD43P6S2QYWi+C1rk/58kqA6 zfoPZuwjQXHn/gKqKAGAr5vB5PKJpCx+07amTQ7dp9pZIBR77/C0HhuNtn7Q18VToi 5lp/tI/765+rsL6BfATwEq4u9arW8iJkVuoDQDEA= 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 6.1 187/482] jfs: Regular file corruption check Date: Tue, 26 Aug 2025 13:07:20 +0200 Message-ID: <20250826110935.424730020@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250826110930.769259449@linuxfoundation.org> References: <20250826110930.769259449@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 6.1-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 332dc9ac47a9..ae8df3d11663 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