From: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
To: matt.fleming@intel.com, ard.biesheuvel@linaro.org
Cc: leif.lindholm@linaro.org, linux-kernel@vger.kernel.org,
Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
Subject: [Patch v2 1/3] firmware: dmi_scan: fix dmi_len type
Date: Wed, 18 Feb 2015 13:33:19 +0200 [thread overview]
Message-ID: <1424259201-24886-2-git-send-email-ivan.khoronzhuk@linaro.org> (raw)
In-Reply-To: <1424259201-24886-1-git-send-email-ivan.khoronzhuk@linaro.org>
According to SMBIOSv3 specification the length of DMI table can be
up to 32bits wide. So use appropriate type to avoid overflow.
It's obvious that dmi_num theoretically can be more than u16 also,
so it's can be changed to u32 or at least it's better to use int
instead of u16, but on that moment I cannot imagine dmi structure
count more than 65535 and it can require changing type of vars that
work with it. So I didn't correct it.
Acked-by: Ard Biesheuvel <ard@linaro.org>
Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@linaro.org>
---
drivers/firmware/dmi_scan.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/firmware/dmi_scan.c b/drivers/firmware/dmi_scan.c
index 66fda58..07d2960 100644
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -78,7 +78,7 @@ static const char * __init dmi_string(const struct dmi_header *dm, u8 s)
* We have to be cautious here. We have seen BIOSes with DMI pointers
* pointing to completely the wrong place for example
*/
-static void dmi_table(u8 *buf, int len, int num,
+static void dmi_table(u8 *buf, u32 len, int num,
void (*decode)(const struct dmi_header *, void *),
void *private_data)
{
@@ -117,7 +117,7 @@ static void dmi_table(u8 *buf, int len, int num,
static u8 smbios_header[32];
static int smbios_header_size;
static phys_addr_t dmi_base;
-static u16 dmi_len;
+static u32 dmi_len;
static u16 dmi_num;
static int __init dmi_walk_early(void (*decode)(const struct dmi_header *,
--
1.9.1
next prev parent reply other threads:[~2015-02-18 11:33 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-18 11:33 [Patch v2 0/3] firmware: dmi_scan: add some SMBIOSv3 corrections Ivan Khoronzhuk
2015-02-18 11:33 ` Ivan Khoronzhuk [this message]
2015-02-23 13:42 ` [Patch v2 1/3] firmware: dmi_scan: fix dmi_len type Matt Fleming
2015-02-18 11:33 ` [Patch v2 2/3] firmware: dmi_scan: use full dmi version for SMBIOS3 Ivan Khoronzhuk
2015-02-23 13:54 ` Matt Fleming
2015-04-13 16:58 ` Jean Delvare
2015-02-18 11:33 ` [Patch v2 3/3] firmware: dmi_scan: use direct access to static vars Ivan Khoronzhuk
2015-02-23 13:55 ` Matt Fleming
2015-04-13 17:26 ` Jean Delvare
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