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drm/msm: Use scnprintf() for avoiding potential buffer overflow

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Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>
This commit is contained in:
Takashi Iwai 2020-03-11 08:34:10 +01:00 committed by Rob Clark
parent 4c145df18f
commit b83caf4253
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/msm/adreno/adreno_gpu.c
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@ -673,7 +673,7 @@ static char *adreno_gpu_ascii85_encode(u32 *src, size_t len)
return NULL;
for (i = 0; i < l; i++)
buf_itr += snprintf(buf + buf_itr, buffer_size - buf_itr, "%s",
buf_itr += scnprintf(buf + buf_itr, buffer_size - buf_itr, "%s",
ascii85_encode(src[i], out));
return buf;