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media: venus: hfi_parser: add check to avoid out of bound access

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There is a possibility that init_codecs is invoked multiple times during
manipulated payload from video firmware. In such case, if codecs_count
can get incremented to value more than MAX_CODEC_NUM, there can be OOB
access. Reset the count so that it always starts from beginning.

Cc: stable@vger.kernel.org
Fixes: 1a73374a04 ("media: venus: hfi_parser: add common capability parser")
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
This commit is contained in:
Vikash Garodia 2025-02-20 22:50:08 +05:30 committed by Hans Verkuil
parent d98e9213a7
commit 172bf5a9ef
1 changed files with 2 additions and 0 deletions
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2
drivers/media/platform/qcom/venus/hfi_parser.c
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@ -19,6 +19,8 @@ static void init_codecs(struct venus_core *core)
struct hfi_plat_caps *caps = core->caps, *cap;
unsigned long bit;
core->codecs_count = 0;
if (hweight_long(core->dec_codecs) + hweight_long(core->enc_codecs) > MAX_CODEC_NUM)
return;