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authorPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>2020-09-03 00:21:21 +0300
committerTakashi Iwai <tiwai@suse.de>2020-09-03 10:25:55 +0300
commitcd91fd9f0af5453e66bda9984916ca67686689cf (patch)
treeff550da82f1ff5687a911c32d364d0277df59927 /sound/core
parent3bcf8eeb7d979402d3db96fb58bed456a3c66668 (diff)
downloadlinux-cd91fd9f0af5453e66bda9984916ca67686689cf.tar.xz
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')
-rw-r--r--sound/core/compress_offload.c3
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) {