Re: [PATCH 1/4] media: venus: hfi_parser: add check to avoid out of bound access

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On 06/11/2024 07:25, Vikash Garodia wrote:
           cap = &caps[core->codecs_count++];
           cap->codec = BIT(bit);
           cap->domain = VIDC_SESSION_TYPE_ENC;

I don't see how codecs_count could be greater than the control, since you
increment by one on each loop but >= is fine too I suppose.
Assume the payload from malicious firmware is packed like below
HFI_PROPERTY_PARAM_CODEC_SUPPORTED
HFI_PROPERTY_PARAM_CODEC_SUPPORTED
HFI_PROPERTY_PARAM_CODEC_SUPPORTED
.....
for 32 or more instances of above type

But you do this

          cap = &caps[core->codecs_count++];

for each bit.

Anyway consider Dmitry's input re only calling this function once instead.

---
bod




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