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 4C16C1714D0; Thu, 15 Aug 2024 13:34:40 +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=1723728880; cv=none; b=MnUKFQwmRBqdX2/PTSPCdkAXEQjk2RZ96EGsbSTm/E/aE2Zjol4DIusTRah+Iy8shfzrDKvu0fxFIRjBWNuvVBuETwqcPy6rJ7P5rKlOQLGbJ0RWAZko0i13uRYjd2RoLU7/0WXcrHGgg14gtKNBV9Y/Ew8/pG+It3Ycy3YT14M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1723728880; c=relaxed/simple; bh=/rUquG+zwFYO/JBs44gsnmUTfIl2hqis0iN5BJlw7zQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=rG0pxjbe9qKR7s+sOIU7GTyVcYG7mq4Zgw9ujCgBne/tnoNwsc8iOqSAC1dkFzN2BAt1e6YDDlMl7djZD14mzN/XyHfNBrWjJaZHtRhuOdIDoQeoORbVP+yF9HHfFXq6utm4pNSqP/wvEy72MrLSFSKGTB5cMV0MeIKRAWVqXWE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=F4NmShaE; 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="F4NmShaE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id C3AB1C32786; Thu, 15 Aug 2024 13:34:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1723728880; bh=/rUquG+zwFYO/JBs44gsnmUTfIl2hqis0iN5BJlw7zQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=F4NmShaE6TeErjwAKm+mnx4SxYyWnPY5No5R2LDj4d7uhQVY3mP0bpLPFV80VnWWB KUUgQBiCGu+86XA8zmNRUftzKhWhEem/D6Y6nqi/jfFx8g3JhCgWSkm3YO+LjCI7EX 07nVSubTbWAjcs/oIhS9tcTDbdSczmLE4bQWrQ5E= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, tuhaowen , stable , Sasha Levin Subject: [PATCH 4.19 112/196] dev/parport: fix the array out-of-bounds risk Date: Thu, 15 Aug 2024 15:23:49 +0200 Message-ID: <20240815131856.365351120@linuxfoundation.org> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240815131852.063866671@linuxfoundation.org> References: <20240815131852.063866671@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ From: tuhaowen [ Upstream commit ab11dac93d2d568d151b1918d7b84c2d02bacbd5 ] Fixed array out-of-bounds issues caused by sprintf by replacing it with snprintf for safer data copying, ensuring the destination buffer is not overflowed. Below is the stack trace I encountered during the actual issue: [ 66.575408s] [pid:5118,cpu4,QThread,4]Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: do_hardware_base_addr+0xcc/0xd0 [parport] [ 66.575408s] [pid:5118,cpu4,QThread,5]CPU: 4 PID: 5118 Comm: QThread Tainted: G S W O 5.10.97-arm64-desktop #7100.57021.2 [ 66.575439s] [pid:5118,cpu4,QThread,6]TGID: 5087 Comm: EFileApp [ 66.575439s] [pid:5118,cpu4,QThread,7]Hardware name: HUAWEI HUAWEI QingYun PGUX-W515x-B081/SP1PANGUXM, BIOS 1.00.07 04/29/2024 [ 66.575439s] [pid:5118,cpu4,QThread,8]Call trace: [ 66.575469s] [pid:5118,cpu4,QThread,9] dump_backtrace+0x0/0x1c0 [ 66.575469s] [pid:5118,cpu4,QThread,0] show_stack+0x14/0x20 [ 66.575469s] [pid:5118,cpu4,QThread,1] dump_stack+0xd4/0x10c [ 66.575500s] [pid:5118,cpu4,QThread,2] panic+0x1d8/0x3bc [ 66.575500s] [pid:5118,cpu4,QThread,3] __stack_chk_fail+0x2c/0x38 [ 66.575500s] [pid:5118,cpu4,QThread,4] do_hardware_base_addr+0xcc/0xd0 [parport] Signed-off-by: tuhaowen Cc: stable Link: https://lore.kernel.org/r/20240708080430.8221-1-tuhaowen@uniontech.com Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/parport/procfs.c | 24 ++++++++++++------------ 1 file changed, 12 insertions(+), 12 deletions(-) diff --git a/drivers/parport/procfs.c b/drivers/parport/procfs.c index e957beb94f142..595e23e6859b6 100644 --- a/drivers/parport/procfs.c +++ b/drivers/parport/procfs.c @@ -51,12 +51,12 @@ static int do_active_device(struct ctl_table *table, int write, for (dev = port->devices; dev ; dev = dev->next) { if(dev == port->cad) { - len += sprintf(buffer, "%s\n", dev->name); + len += snprintf(buffer, sizeof(buffer), "%s\n", dev->name); } } if(!len) { - len += sprintf(buffer, "%s\n", "none"); + len += snprintf(buffer, sizeof(buffer), "%s\n", "none"); } if (len > *lenp) @@ -87,19 +87,19 @@ static int do_autoprobe(struct ctl_table *table, int write, } if ((str = info->class_name) != NULL) - len += sprintf (buffer + len, "CLASS:%s;\n", str); + len += snprintf (buffer + len, sizeof(buffer) - len, "CLASS:%s;\n", str); if ((str = info->model) != NULL) - len += sprintf (buffer + len, "MODEL:%s;\n", str); + len += snprintf (buffer + len, sizeof(buffer) - len, "MODEL:%s;\n", str); if ((str = info->mfr) != NULL) - len += sprintf (buffer + len, "MANUFACTURER:%s;\n", str); + len += snprintf (buffer + len, sizeof(buffer) - len, "MANUFACTURER:%s;\n", str); if ((str = info->description) != NULL) - len += sprintf (buffer + len, "DESCRIPTION:%s;\n", str); + len += snprintf (buffer + len, sizeof(buffer) - len, "DESCRIPTION:%s;\n", str); if ((str = info->cmdset) != NULL) - len += sprintf (buffer + len, "COMMAND SET:%s;\n", str); + len += snprintf (buffer + len, sizeof(buffer) - len, "COMMAND SET:%s;\n", str); if (len > *lenp) len = *lenp; @@ -117,7 +117,7 @@ static int do_hardware_base_addr(struct ctl_table *table, int write, size_t *lenp, loff_t *ppos) { struct parport *port = (struct parport *)table->extra1; - char buffer[20]; + char buffer[64]; int len = 0; if (*ppos) { @@ -128,7 +128,7 @@ static int do_hardware_base_addr(struct ctl_table *table, int write, if (write) /* permissions prevent this anyway */ return -EACCES; - len += sprintf (buffer, "%lu\t%lu\n", port->base, port->base_hi); + len += snprintf (buffer, sizeof(buffer), "%lu\t%lu\n", port->base, port->base_hi); if (len > *lenp) len = *lenp; @@ -156,7 +156,7 @@ static int do_hardware_irq(struct ctl_table *table, int write, if (write) /* permissions prevent this anyway */ return -EACCES; - len += sprintf (buffer, "%d\n", port->irq); + len += snprintf (buffer, sizeof(buffer), "%d\n", port->irq); if (len > *lenp) len = *lenp; @@ -184,7 +184,7 @@ static int do_hardware_dma(struct ctl_table *table, int write, if (write) /* permissions prevent this anyway */ return -EACCES; - len += sprintf (buffer, "%d\n", port->dma); + len += snprintf (buffer, sizeof(buffer), "%d\n", port->dma); if (len > *lenp) len = *lenp; @@ -216,7 +216,7 @@ static int do_hardware_modes(struct ctl_table *table, int write, #define printmode(x) \ do { \ if (port->modes & PARPORT_MODE_##x) \ - len += sprintf(buffer + len, "%s%s", f++ ? "," : "", #x); \ + len += snprintf(buffer + len, sizeof(buffer) - len, "%s%s", f++ ? "," : "", #x); \ } while (0) int f = 0; printmode(PCSPP); -- 2.43.0