From: Takashi Iwai <tiwai@suse.de>
To: Rob Clark <robdclark@gmail.com>, Sean Paul <sean@poorly.run>
Cc: linux-arm-msm@vger.kernel.org, freedreno@lists.freedesktop.org
Subject: [PATCH] drm/msm: Use scnprintf() for avoiding potential buffer overflow
Date: Wed, 11 Mar 2020 08:34:10 +0100 [thread overview]
Message-ID: <20200311073410.6599-1-tiwai@suse.de> (raw)
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>
---
drivers/gpu/drm/msm/adreno/adreno_gpu.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/msm/adreno/adreno_gpu.c b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
index 7fd29829b2fa..1d5c43c22269 100644
--- a/drivers/gpu/drm/msm/adreno/adreno_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/adreno_gpu.c
@@ -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;
--
2.16.4
reply other threads:[~2020-03-11 7:34 UTC|newest]
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