From: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
So far we control all the reads an none of them exceeds the current
limit of 20 bytes, but we never think about this when reviewing
patches, so add a big WARN. In case we ever hit that WARN, we whould
change the size of the reply array.
Signed-off-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx>
---
drivers/gpu/drm/i915/intel_dp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 20e468c..f30b691 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -577,6 +577,8 @@ intel_dp_aux_native_read(struct intel_dp *intel_dp,
msg_bytes = 4;
reply_bytes = recv_bytes + 1;
+ if (WARN_ON(reply_bytes > sizeof(reply)))
+ return -E2BIG;
for (;;) {
ret = intel_dp_aux_ch(intel_dp, msg, msg_bytes,
--
1.8.3.1
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