From 84a9f33614e3cfcc7326629a503d4389c9d84e0f Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 22 Jun 2008 14:19:29 -0300 Subject: [PATCH] V4L/DVB (8136): xc2028 unaligned access fixes Signed-off-by: Al Viro Signed-off-by: Mauro Carvalho Chehab --- drivers/media/common/tuners/tuner-xc2028.c | 25 ++++++++++++++----------- 1 file changed, 14 insertions(+), 11 deletions(-) diff --git a/drivers/media/common/tuners/tuner-xc2028.c b/drivers/media/common/tuners/tuner-xc2028.c index 30eb07b..4dd1d24 100644 --- a/drivers/media/common/tuners/tuner-xc2028.c +++ b/drivers/media/common/tuners/tuner-xc2028.c @@ -15,6 +15,7 @@ #include #include #include +#include #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"); -- 2.7.4