diff options
| author | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-22 14:42:13 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@infradead.org> | 2008-04-24 14:07:44 -0300 |
| commit | f13613acfb1a71895ac886dc831d6ae4e20e241a (patch) | |
| tree | ead5941f87548b9848837dab2d78d364913037de | |
| parent | 6a6179b6db401acde5798b4da0fdff32b126ee15 (diff) | |
V4L/DVB (7235): tuner-simple: fix a buffer overflow
simple_set_tv() creates a buffer with 4 elements, and calls
simple_std_setup(), passing &buffer[1]. This makes the 5th element of buffer to
be initialized to 0, overriding some area outside the buffer.
Also, simple_std_setup() receives a buffer as parameter, but the buffer is
just overriden after the call, so, it doesn't make much sense to pass it as a
parameter.
This patch removes buffer[] from the function call, creating, instead, a local
var to be used internally.
Thanks to Axel Rometsch <axel.rometsch@freenet.de> for pointing the issue.
Reviewed-by: Michael Krufky <mkrufky@linuxtv.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@infradead.org>
| -rw-r--r-- | drivers/media/video/tuner-simple.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/drivers/media/video/tuner-simple.c b/drivers/media/video/tuner-simple.c index dc2467159ec..ee5ef860700 100644 --- a/drivers/media/video/tuner-simple.c +++ b/drivers/media/video/tuner-simple.c @@ -251,7 +251,7 @@ static int simple_config_lookup(struct dvb_frontend *fe, static int simple_std_setup(struct dvb_frontend *fe, struct analog_parameters *params, - u8 *buffer, u8 *config, u8 *cb) + u8 *config, u8 *cb) { struct tuner_simple_priv *priv = fe->tuner_priv; u8 tuneraddr; @@ -323,14 +323,12 @@ static int simple_std_setup(struct dvb_frontend *fe, break; case TUNER_PHILIPS_TUV1236D: + { /* 0x40 -> ATSC antenna input 1 */ /* 0x48 -> ATSC antenna input 2 */ /* 0x00 -> NTSC antenna input 1 */ /* 0x08 -> NTSC antenna input 2 */ - buffer[0] = 0x14; - buffer[1] = 0x00; - buffer[2] = 0x17; - buffer[3] = 0x00; + u8 buffer[4] = { 0x14, 0x00, 0x17, 0x00}; *cb &= ~0x40; if (params->std & V4L2_STD_ATSC) { *cb |= 0x40; @@ -351,6 +349,7 @@ static int simple_std_setup(struct dvb_frontend *fe, /* FIXME: input */ break; } + } return 0; } @@ -509,7 +508,7 @@ static int simple_set_tv_freq(struct dvb_frontend *fe, offset / 16, offset % 16 * 100 / 16, div); /* tv norm specific stuff for multi-norm tuners */ - simple_std_setup(fe, params, &buffer[1], &config, &cb); + simple_std_setup(fe, params, &config, &cb); if (t_params->cb_first_if_lower_freq && div < priv->last_div) { buffer[0] = config; |