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Subject: media: venus: hfi: add checks to handle capabilities from firmware
Author: Vikash Garodia <quic_vgaro...@quicinc.com>
Date: Thu Aug 10 07:55:03 2023 +0530
The hfi parser, parses the capabilities received from venus firmware and
copies them to core capabilities. Consider below api, for example,
fill_caps - In this api, caps in core structure gets updated with the
number of capabilities received in firmware data payload. If the same api
is called multiple times, there is a possibility of copying beyond the max
allocated size in core caps.
Similar possibilities in fill_raw_fmts and fill_profile_level functions.
Cc: sta...@vger.kernel.org
Fixes: 1a73374a04e5 ("media: venus: hfi_parser: add common capability parser")
Signed-off-by: Vikash Garodia <quic_vgaro...@quicinc.com>
Signed-off-by: Stanimir Varbanov <stanimir.k.varba...@gmail.com>
Signed-off-by: Hans Verkuil <hverkuil-ci...@xs4all.nl>
drivers/media/platform/qcom/venus/hfi_parser.c | 12 ++++++++++++
1 file changed, 12 insertions(+)
---
diff --git a/drivers/media/platform/qcom/venus/hfi_parser.c
b/drivers/media/platform/qcom/venus/hfi_parser.c
index 6cf74b2bc5ae..9d6ba22698cc 100644
--- a/drivers/media/platform/qcom/venus/hfi_parser.c
+++ b/drivers/media/platform/qcom/venus/hfi_parser.c
@@ -86,6 +86,9 @@ static void fill_profile_level(struct hfi_plat_caps *cap,
const void *data,
{
const struct hfi_profile_level *pl = data;
+ if (cap->num_pl + num >= HFI_MAX_PROFILE_COUNT)
+ return;
+
memcpy(&cap->pl[cap->num_pl], pl, num * sizeof(*pl));
cap->num_pl += num;
}
@@ -111,6 +114,9 @@ fill_caps(struct hfi_plat_caps *cap, const void *data,
unsigned int num)
{
const struct hfi_capability *caps = data;
+ if (cap->num_caps + num >= MAX_CAP_ENTRIES)
+ return;
+
memcpy(&cap->caps[cap->num_caps], caps, num * sizeof(*caps));
cap->num_caps += num;
}
@@ -137,6 +143,9 @@ static void fill_raw_fmts(struct hfi_plat_caps *cap, const
void *fmts,
{
const struct raw_formats *formats = fmts;
+ if (cap->num_fmts + num_fmts >= MAX_FMT_ENTRIES)
+ return;
+
memcpy(&cap->fmts[cap->num_fmts], formats, num_fmts * sizeof(*formats));
cap->num_fmts += num_fmts;
}
@@ -159,6 +168,9 @@ parse_raw_formats(struct venus_core *core, u32 codecs, u32
domain, void *data)
rawfmts[i].buftype = fmt->buffer_type;
i++;
+ if (i >= MAX_FMT_ENTRIES)
+ return;
+
if (pinfo->num_planes > MAX_PLANES)
break;
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