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| author | Christian Vogel <vogelchr@vogel.cx> | 2014-10-25 15:40:41 +0400 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-10-27 16:09:14 +0300 |
| commit | d1d0b6b668818571122d30d68a0b3f768bd83a52 (patch) | |
| tree | 9b7d31a99e386ee272992e9f0fd7b67c5dd64316 /sound/firewire/bebob/bebob_stream.c | |
| parent | d5432503bfb49f3425bad0b850714ffd8b533cfc (diff) | |
| download | linux-d1d0b6b668818571122d30d68a0b3f768bd83a52.tar.xz | |
ALSA: bebob: Uninitialized id returned by saffirepro_both_clk_src_get
snd_bebob_stream_check_internal_clock() may get an id from
saffirepro_both_clk_src_get (via clk_src->get()) that was uninitialized.
a) make logic in saffirepro_both_clk_src_get explicit
b) test if id used in snd_bebob_stream_check_internal_clock matches array size
[fixed missing signed prefix to *_maps[] by tiwai]
Signed-off-by: Christian Vogel <vogelchr@vogel.cx>
Reviewed-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Cc: <stable@vger.kernel.org>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/bebob/bebob_stream.c')
| -rw-r--r-- | sound/firewire/bebob/bebob_stream.c | 18 |
1 files changed, 15 insertions, 3 deletions
diff --git a/sound/firewire/bebob/bebob_stream.c b/sound/firewire/bebob/bebob_stream.c index ef4d0c9f6578..1aab0a32870c 100644 --- a/sound/firewire/bebob/bebob_stream.c +++ b/sound/firewire/bebob/bebob_stream.c @@ -129,12 +129,24 @@ snd_bebob_stream_check_internal_clock(struct snd_bebob *bebob, bool *internal) /* 1.The device has its own operation to switch source of clock */ if (clk_spec) { err = clk_spec->get(bebob, &id); - if (err < 0) + if (err < 0) { dev_err(&bebob->unit->device, "fail to get clock source: %d\n", err); - else if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL, - strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0) + goto end; + } + + if (id >= clk_spec->num) { + dev_err(&bebob->unit->device, + "clock source %d out of range 0..%d\n", + id, clk_spec->num - 1); + err = -EIO; + goto end; + } + + if (strncmp(clk_spec->labels[id], SND_BEBOB_CLOCK_INTERNAL, + strlen(SND_BEBOB_CLOCK_INTERNAL)) == 0) *internal = true; + goto end; } |