[PATCH v2] libibverb/examples: Protect against memory corruption

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Make sure num_qp is less than MAX_QP so we will not overrun my_dest
array.

Signed-off-by: Yuval Shaia <yuval.shaia@xxxxxxxxxx>
---
v1 -> v2:
	* Accept comment from Ruhl, Michael J
---
 libibverbs/examples/srq_pingpong.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/libibverbs/examples/srq_pingpong.c b/libibverbs/examples/srq_pingpong.c
index c289b463..014d114f 100644
--- a/libibverbs/examples/srq_pingpong.c
+++ b/libibverbs/examples/srq_pingpong.c
@@ -759,6 +759,12 @@ int main(int argc, char *argv[])
 		return 1;
 	}
 
+	if (num_qp >= MAX_QP) {
+		fprintf(stderr, "num_qp %d must be less than %d\n", num_qp,
+			MAX_QP - 1);
+		return 1;
+	}
+
 	num_wc = num_qp + rx_depth;
 	wc     = alloca(num_wc * sizeof *wc);
 
-- 
2.14.3

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