diff options
| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2020-09-02 23:21:21 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2020-09-03 09:25:55 +0200 |
| commit | cd91fd9f0af5453e66bda9984916ca67686689cf (patch) | |
| tree | ff550da82f1ff5687a911c32d364d0277df59927 /sound/core/compress_offload.c | |
| parent | ALSA: core: timer: clarify operator precedence (diff) | |
| download | linux-cd91fd9f0af5453e66bda9984916ca67686689cf.tar.xz linux-cd91fd9f0af5453e66bda9984916ca67686689cf.zip | |
ALSA: compress_offload: dereference after checking for NULL pointer
Fix cppcheck warning and only dereference once the initial checks are
done:
sound/core/compress_offload.c:516:38: warning: Either the condition
'!stream' is redundant or there is possible null pointer dereference:
stream. [nullPointerRedundantCheck]
struct snd_compr_runtime *runtime = stream->runtime;
^
sound/core/compress_offload.c:518:17: note: Assuming that condition
'!stream' is not redundant
if (snd_BUG_ON(!(stream) || !(stream)->runtime))
^
sound/core/compress_offload.c:516:38: note: Null pointer dereference
struct snd_compr_runtime *runtime = stream->runtime;
^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Acked-by: Vinod Koul <vkoul@kernel.org>
Link: https://lore.kernel.org/r/20200902212133.30964-7-pierre-louis.bossart@linux.intel.com
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/core/compress_offload.c')
| -rw-r--r-- | sound/core/compress_offload.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/sound/core/compress_offload.c b/sound/core/compress_offload.c index 0e53f6f31916..e3eb314acb10 100644 --- a/sound/core/compress_offload.c +++ b/sound/core/compress_offload.c @@ -513,10 +513,11 @@ EXPORT_SYMBOL(snd_compr_malloc_pages); int snd_compr_free_pages(struct snd_compr_stream *stream) { - struct snd_compr_runtime *runtime = stream->runtime; + struct snd_compr_runtime *runtime; if (snd_BUG_ON(!(stream) || !(stream)->runtime)) return -EINVAL; + runtime = stream->runtime; if (runtime->dma_area == NULL) return 0; if (runtime->dma_buffer_p != &stream->dma_buffer) { |