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media: vicodec: fix memchr() kernel oops

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The size passed to memchr is too large as it assumes the search
starts at the start of the buffer, but it can start at an offset.

Cc: <stable@vger.kernel.org>      # for v4.19 and up
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Hans Verkuil 2018-11-17 06:25:08 -05:00 committed by Mauro Carvalho Chehab
parent 0408b205f1
commit cb3b2ffb75
1 changed files with 2 additions and 1 deletions
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3
drivers/media/platform/vicodec/vicodec-core.c
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@ -304,7 +304,8 @@ static int job_ready(void *priv)
for (; p < p_out + sz; p++) {
u32 copy;
p = memchr(p, magic[ctx->comp_magic_cnt], sz);
p = memchr(p, magic[ctx->comp_magic_cnt],
p_out + sz - p);
if (!p) {
ctx->comp_magic_cnt = 0;
break;