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V4L/DVB (8136): xc2028 unaligned access fixes

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
This commit is contained in:
Al Viro 2008-06-22 14:19:29 -03:00 committed by Mauro Carvalho Chehab
parent 153755a774
commit 84a9f33614
1 changed files with 14 additions and 11 deletions
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25
drivers/media/common/tuners/tuner-xc2028.c
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@ -15,6 +15,7 @@
#include <linux/delay.h>
#include <media/tuner.h>
#include <linux/mutex.h>
#include <asm/unaligned.h>
#include "tuner-i2c.h"
#include "tuner-xc2028.h"
#include "tuner-xc2028-types.h"
@ -292,10 +293,10 @@ static int load_all_firmwares(struct dvb_frontend *fe)
name[sizeof(name) - 1] = 0;
p += sizeof(name) - 1;
priv->firm_version = le16_to_cpu(*(__u16 *) p);
priv->firm_version = get_unaligned_le16(p);
p += 2;
n_array = le16_to_cpu(*(__u16 *) p);
n_array = get_unaligned_le16(p);
p += 2;
tuner_info("Loading %d firmware images from %s, type: %s, ver %d.%d\n",
@ -324,26 +325,26 @@ static int load_all_firmwares(struct dvb_frontend *fe)
}
/* Checks if there's enough bytes to read */
if (p + sizeof(type) + sizeof(id) + sizeof(size) > endp) {
tuner_err("Firmware header is incomplete!\n");
goto corrupt;
}
if (endp - p < sizeof(type) + sizeof(id) + sizeof(size))
goto header;
type = le32_to_cpu(*(__u32 *) p);
type = get_unaligned_le32(p);
p += sizeof(type);
id = le64_to_cpu(*(v4l2_std_id *) p);
id = get_unaligned_le64(p);
p += sizeof(id);
if (type & HAS_IF) {
int_freq = le16_to_cpu(*(__u16 *) p);
int_freq = get_unaligned_le16(p);
p += sizeof(int_freq);
if (endp - p < sizeof(size))
goto header;
}
size = le32_to_cpu(*(__u32 *) p);
size = get_unaligned_le32(p);
p += sizeof(size);
if ((!size) || (size + p > endp)) {
if (!size || size > endp - p) {
tuner_err("Firmware type ");
dump_firm_type(type);
printk("(%x), id %llx is corrupted "
@ -382,6 +383,8 @@ static int load_all_firmwares(struct dvb_frontend *fe)
goto done;
header:
tuner_err("Firmware header is incomplete!\n");
corrupt:
rc = -EINVAL;
tuner_err("Error: firmware file is corrupted!\n");