From: Vikash Garodia Date: Thu, 10 Aug 2023 02:25:04 +0000 (+0530) Subject: media: venus: hfi_parser: Add check to keep the number of codecs within range X-Git-Tag: v6.5.13~71 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8da410e429d21384239b57ad64700cc4873ac468;p=thirdparty%2Fkernel%2Fstable.git media: venus: hfi_parser: Add check to keep the number of codecs within range commit 0768a9dd809ef52440b5df7dce5a1c1c7e97abbd upstream. Supported codec bitmask is populated from the payload from venus firmware. There is a possible case when all the bits in the codec bitmask is set. In such case, core cap for decoder is filled and MAX_CODEC_NUM is utilized. Now while filling the caps for encoder, it can lead to access the caps array beyong 32 index. Hence leading to OOB write. The fix counts the supported encoder and decoder. If the count is more than max, then it skips accessing the caps. Cc: stable@vger.kernel.org Fixes: 1a73374a04e5 ("media: venus: hfi_parser: add common capability parser") Signed-off-by: Vikash Garodia Signed-off-by: Stanimir Varbanov Signed-off-by: Hans Verkuil Signed-off-by: Greg Kroah-Hartman --- diff --git a/drivers/media/platform/qcom/venus/hfi_parser.c b/drivers/media/platform/qcom/venus/hfi_parser.c index 6cf74b2bc5ae3..f28e72fecf955 100644 --- a/drivers/media/platform/qcom/venus/hfi_parser.c +++ b/drivers/media/platform/qcom/venus/hfi_parser.c @@ -19,6 +19,9 @@ static void init_codecs(struct venus_core *core) struct hfi_plat_caps *caps = core->caps, *cap; unsigned long bit; + if (hweight_long(core->dec_codecs) + hweight_long(core->enc_codecs) > MAX_CODEC_NUM) + return; + for_each_set_bit(bit, &core->dec_codecs, MAX_CODEC_NUM) { cap = &caps[core->codecs_count++]; cap->codec = BIT(bit);