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| author | Laura Abbott <labbott@fedoraproject.org> | 2015-09-30 02:10:10 +0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-10-22 19:48:25 +0200 |
| commit | a828d72df216c36e9c40b6c24dc4b17b6f7b5a76 (patch) | |
| tree | 03f35fc02a8c34cf42461b7ee09eb4c5cc3c9768 /drivers/media/tuners/si2157.c | |
| parent | [media] ir-hix5hd2: drop the use of IRQF_NO_SUSPEND (diff) | |
| download | linux-a828d72df216c36e9c40b6c24dc4b17b6f7b5a76.tar.xz linux-a828d72df216c36e9c40b6c24dc4b17b6f7b5a76.zip | |
[media] si2157: Bounds check firmware
When reading the firmware and sending commands, the length
must be bounds checked to avoid overrunning the size of the command
buffer and smashing the stack if the firmware is not in the
expected format. Add the proper check.
Cc: stable@kernel.org
Signed-off-by: Laura Abbott <labbott@fedoraproject.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to '')
| -rw-r--r-- | drivers/media/tuners/si2157.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/media/tuners/si2157.c b/drivers/media/tuners/si2157.c index 507382160e5e..ce157edd45fa 100644 --- a/drivers/media/tuners/si2157.c +++ b/drivers/media/tuners/si2157.c @@ -166,6 +166,10 @@ static int si2157_init(struct dvb_frontend *fe) for (remaining = fw->size; remaining > 0; remaining -= 17) { len = fw->data[fw->size - remaining]; + if (len > SI2157_ARGLEN) { + dev_err(&client->dev, "Bad firmware length\n"); + goto err_release_firmware; + } memcpy(cmd.args, &fw->data[(fw->size - remaining) + 1], len); cmd.wlen = len; cmd.rlen = 1; |