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asoc : msm: Fix zero size pointer issue 

APPS crashes randomly due to invalid memory allocation
in q6asm_audio_client_buf_free_contiguous.
Added check to return error if memory allocation size is 0.

Change-Id: I40f49aa147d513b29b56224a5ee77ccbb2dcc110
CRs-Fixed: 2285272
Signed-off-by: Soumya Managoli <smanag@codeaurora.org>
This commit is contained in:
Soumya Managoli 2018-07-31 18:38:29 +05:30 committed by syphyr
parent 9a89fcb7d3
commit 2e7be3d027
1 changed files with 6 additions and 0 deletions
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6
sound/soc/msm/qdsp6v2/q6asm.c
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@ -1233,6 +1233,12 @@ int q6asm_audio_client_buf_alloc_contiguous(unsigned int dir,
pr_err("%s: buffer already allocated\n", __func__);
return 0;
}
if (bufcnt == 0) {
pr_err("%s: invalid buffer count\n", __func__);
return -EINVAL;
}
mutex_lock(&ac->cmd_lock);
buf = kzalloc(((sizeof(struct audio_buffer))*bufcnt),
GFP_KERNEL);