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 931A9146588; Tue, 15 Oct 2024 11:42:42 +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=1728992562; cv=none; b=A1INRFBjJHFvbYPuhmbUSIcfOAnbGlrkbigKm5sbczCaDohpqJJHNMyOZt9zisx7RC2RsbfmkG/FcxSnbgfSsvkIgAn/oNoJDAGT3+0GLRJGMwrAYs0yi7a/kPjBo2let63J+psz9BTU7IlaI9O+p8pzPi6688oey/qsaDaWAE4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728992562; c=relaxed/simple; bh=FElow6OyCn59uo2OLrAbnvT7VdYHBLyQPWXnigtZGy8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=LwQYOlcEUC221l6LR02NNyr7m8AHW2ioQ/Z2n9W03cSY5dy6cF2BNB6T0P2DFRO6ljjvD4IUEtYTzoSiZEHgumdXESlNmkO+nW4DwPekVsvGX34aMoag1o2FMBxX3EfFBl0E58bKlcgdW6QZjBjIcv/HK8xDUSBtOK4BhAXfMeo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=x1fnXmCI; 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="x1fnXmCI" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AF4F5C4CEC6; Tue, 15 Oct 2024 11:42:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1728992562; bh=FElow6OyCn59uo2OLrAbnvT7VdYHBLyQPWXnigtZGy8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=x1fnXmCIaPW/unNzP0PPmIpNh8trQbCoIfTXihVr7tcPvLNDyW3dT70l0qFS7Wm35 c5+b20ohVUfetbydvK606P+w+L3lmcqFuRuixLhay/K8xSkIxURjxb/dFkhEaZWBrB v4S/KGhCloT6GbrgvkqE0pnPyxVU6esj7FZWzfsU= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , linux-mtd@lists.infradead.org, Mirsad Todorovac , Sasha Levin Subject: [PATCH 5.15 153/691] mtd: slram: insert break after errors in parsing the map Date: Tue, 15 Oct 2024 13:21:41 +0200 Message-ID: <20241015112446.428458124@linuxfoundation.org> X-Mailer: git-send-email 2.47.0 In-Reply-To: <20241015112440.309539031@linuxfoundation.org> References: <20241015112440.309539031@linuxfoundation.org> User-Agent: quilt/0.67 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-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Mirsad Todorovac [ Upstream commit 336c218dd7f0588ed8a7345f367975a00a4f003f ] GCC 12.3.0 compiler on linux-next next-20240709 tree found the execution path in which, due to lazy evaluation, devlength isn't initialised with the parsed string: 289 while (map) { 290 devname = devstart = devlength = NULL; 291 292 if (!(devname = strsep(&map, ","))) { 293 E("slram: No devicename specified.\n"); 294 break; 295 } 296 T("slram: devname = %s\n", devname); 297 if ((!map) || (!(devstart = strsep(&map, ",")))) { 298 E("slram: No devicestart specified.\n"); 299 } 300 T("slram: devstart = %s\n", devstart); → 301 if ((!map) || (!(devlength = strsep(&map, ",")))) { 302 E("slram: No devicelength / -end specified.\n"); 303 } → 304 T("slram: devlength = %s\n", devlength); 305 if (parse_cmdline(devname, devstart, devlength) != 0) { 306 return(-EINVAL); 307 } Parsing should be finished after map == NULL, so a break is best inserted after each E("slram: ... \n") error message. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: Miquel Raynal Cc: Richard Weinberger Cc: Vignesh Raghavendra Cc: linux-mtd@lists.infradead.org Signed-off-by: Mirsad Todorovac Signed-off-by: Miquel Raynal Link: https://lore.kernel.org/linux-mtd/20240711234319.637824-1-mtodorovac69@gmail.com Signed-off-by: Sasha Levin --- drivers/mtd/devices/slram.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/mtd/devices/slram.c b/drivers/mtd/devices/slram.c index 28131a127d065..8297b366a0669 100644 --- a/drivers/mtd/devices/slram.c +++ b/drivers/mtd/devices/slram.c @@ -296,10 +296,12 @@ static int __init init_slram(void) T("slram: devname = %s\n", devname); if ((!map) || (!(devstart = strsep(&map, ",")))) { E("slram: No devicestart specified.\n"); + break; } T("slram: devstart = %s\n", devstart); if ((!map) || (!(devlength = strsep(&map, ",")))) { E("slram: No devicelength / -end specified.\n"); + break; } T("slram: devlength = %s\n", devlength); if (parse_cmdline(devname, devstart, devlength) != 0) { -- 2.43.0