From: <gregkh@linuxfoundation.org>
To: s.shtylyov@omp.ru, ulf.hansson@linaro.org
Cc: <stable@vger.kernel.org>
Subject: FAILED: patch "[PATCH] mmc: core: use sysfs_emit() instead of sprintf()" failed to apply to 5.10-stable tree
Date: Sat, 02 Apr 2022 13:33:23 +0200 [thread overview]
Message-ID: <1648899203160121@kroah.com> (raw)
The patch below does not apply to the 5.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From f5d8a5fe77ce933f53eb8f2e22bb7a1a2019ea11 Mon Sep 17 00:00:00 2001
From: Sergey Shtylyov <s.shtylyov@omp.ru>
Date: Tue, 8 Feb 2022 15:02:15 +0300
Subject: [PATCH] mmc: core: use sysfs_emit() instead of sprintf()
sprintf() (still used in the MMC core for the sysfs output) is vulnerable
to the buffer overflow. Use the new-fangled sysfs_emit() instead.
Found by Linux Verification Center (linuxtesting.org) with the SVACE static
analysis tool.
Signed-off-by: Sergey Shtylyov <s.shtylyov@omp.ru>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/717729b2-d65b-c72e-9fac-471d28d00b5a@omp.ru
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
index 096ae624be9a..58a60afa650b 100644
--- a/drivers/mmc/core/bus.c
+++ b/drivers/mmc/core/bus.c
@@ -15,6 +15,7 @@
#include <linux/stat.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -34,13 +35,13 @@ static ssize_t type_show(struct device *dev,
switch (card->type) {
case MMC_TYPE_MMC:
- return sprintf(buf, "MMC\n");
+ return sysfs_emit(buf, "MMC\n");
case MMC_TYPE_SD:
- return sprintf(buf, "SD\n");
+ return sysfs_emit(buf, "SD\n");
case MMC_TYPE_SDIO:
- return sprintf(buf, "SDIO\n");
+ return sysfs_emit(buf, "SDIO\n");
case MMC_TYPE_SD_COMBO:
- return sprintf(buf, "SDcombo\n");
+ return sysfs_emit(buf, "SDcombo\n");
default:
return -EFAULT;
}
diff --git a/drivers/mmc/core/bus.h b/drivers/mmc/core/bus.h
index 8105852c4b62..3996b191b68d 100644
--- a/drivers/mmc/core/bus.h
+++ b/drivers/mmc/core/bus.h
@@ -9,6 +9,7 @@
#define _MMC_CORE_BUS_H
#include <linux/device.h>
+#include <linux/sysfs.h>
struct mmc_host;
struct mmc_card;
@@ -17,7 +18,7 @@ struct mmc_card;
static ssize_t mmc_##name##_show (struct device *dev, struct device_attribute *attr, char *buf) \
{ \
struct mmc_card *card = mmc_dev_to_card(dev); \
- return sprintf(buf, fmt, args); \
+ return sysfs_emit(buf, fmt, args); \
} \
static DEVICE_ATTR(name, S_IRUGO, mmc_##name##_show, NULL)
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index bbbbcaf70a59..13abfcd130a5 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -12,6 +12,7 @@
#include <linux/slab.h>
#include <linux/stat.h>
#include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -812,12 +813,11 @@ static ssize_t mmc_fwrev_show(struct device *dev,
{
struct mmc_card *card = mmc_dev_to_card(dev);
- if (card->ext_csd.rev < 7) {
- return sprintf(buf, "0x%x\n", card->cid.fwrev);
- } else {
- return sprintf(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
- card->ext_csd.fwrev);
- }
+ if (card->ext_csd.rev < 7)
+ return sysfs_emit(buf, "0x%x\n", card->cid.fwrev);
+ else
+ return sysfs_emit(buf, "0x%*phN\n", MMC_FIRMWARE_LEN,
+ card->ext_csd.fwrev);
}
static DEVICE_ATTR(fwrev, S_IRUGO, mmc_fwrev_show, NULL);
@@ -830,10 +830,10 @@ static ssize_t mmc_dsr_show(struct device *dev,
struct mmc_host *host = card->host;
if (card->csd.dsr_imp && host->dsr_req)
- return sprintf(buf, "0x%x\n", host->dsr);
+ return sysfs_emit(buf, "0x%x\n", host->dsr);
else
/* return default DSR value */
- return sprintf(buf, "0x%x\n", 0x404);
+ return sysfs_emit(buf, "0x%x\n", 0x404);
}
static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
diff --git a/drivers/mmc/core/sd.c b/drivers/mmc/core/sd.c
index bd87012c220c..24b0418a24bb 100644
--- a/drivers/mmc/core/sd.c
+++ b/drivers/mmc/core/sd.c
@@ -13,6 +13,7 @@
#include <linux/stat.h>
#include <linux/pm_runtime.h>
#include <linux/scatterlist.h>
+#include <linux/sysfs.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -708,18 +709,16 @@ MMC_DEV_ATTR(ocr, "0x%08x\n", card->ocr);
MMC_DEV_ATTR(rca, "0x%04x\n", card->rca);
-static ssize_t mmc_dsr_show(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t mmc_dsr_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
{
- struct mmc_card *card = mmc_dev_to_card(dev);
- struct mmc_host *host = card->host;
-
- if (card->csd.dsr_imp && host->dsr_req)
- return sprintf(buf, "0x%x\n", host->dsr);
- else
- /* return default DSR value */
- return sprintf(buf, "0x%x\n", 0x404);
+ struct mmc_card *card = mmc_dev_to_card(dev);
+ struct mmc_host *host = card->host;
+
+ if (card->csd.dsr_imp && host->dsr_req)
+ return sysfs_emit(buf, "0x%x\n", host->dsr);
+ /* return default DSR value */
+ return sysfs_emit(buf, "0x%x\n", 0x404);
}
static DEVICE_ATTR(dsr, S_IRUGO, mmc_dsr_show, NULL);
@@ -735,9 +734,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
\
if (num > card->num_info) \
return -ENODATA; \
- if (!card->info[num-1][0]) \
+ if (!card->info[num - 1][0]) \
return 0; \
- return sprintf(buf, "%s\n", card->info[num-1]); \
+ return sysfs_emit(buf, "%s\n", card->info[num - 1]); \
} \
static DEVICE_ATTR_RO(info##num)
diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 41164748723d..25799accf8a0 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -7,6 +7,7 @@
#include <linux/err.h>
#include <linux/pm_runtime.h>
+#include <linux/sysfs.h>
#include <linux/mmc/host.h>
#include <linux/mmc/card.h>
@@ -40,9 +41,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
\
if (num > card->num_info) \
return -ENODATA; \
- if (!card->info[num-1][0]) \
+ if (!card->info[num - 1][0]) \
return 0; \
- return sprintf(buf, "%s\n", card->info[num-1]); \
+ return sysfs_emit(buf, "%s\n", card->info[num - 1]); \
} \
static DEVICE_ATTR_RO(info##num)
diff --git a/drivers/mmc/core/sdio_bus.c b/drivers/mmc/core/sdio_bus.c
index fda03b35c14a..c6268c38c69e 100644
--- a/drivers/mmc/core/sdio_bus.c
+++ b/drivers/mmc/core/sdio_bus.c
@@ -14,6 +14,7 @@
#include <linux/pm_runtime.h>
#include <linux/pm_domain.h>
#include <linux/acpi.h>
+#include <linux/sysfs.h>
#include <linux/mmc/card.h>
#include <linux/mmc/host.h>
@@ -35,7 +36,7 @@ field##_show(struct device *dev, struct device_attribute *attr, char *buf) \
struct sdio_func *func; \
\
func = dev_to_sdio_func (dev); \
- return sprintf(buf, format_string, args); \
+ return sysfs_emit(buf, format_string, args); \
} \
static DEVICE_ATTR_RO(field)
@@ -52,9 +53,9 @@ static ssize_t info##num##_show(struct device *dev, struct device_attribute *att
\
if (num > func->num_info) \
return -ENODATA; \
- if (!func->info[num-1][0]) \
+ if (!func->info[num - 1][0]) \
return 0; \
- return sprintf(buf, "%s\n", func->info[num-1]); \
+ return sysfs_emit(buf, "%s\n", func->info[num - 1]); \
} \
static DEVICE_ATTR_RO(info##num)
reply other threads:[~2022-04-02 11:33 UTC|newest]
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