Test for underflow before subtraction.
Found with -Wtype-limits.
Change-Id: I41cdbb7e6564b715dfe445877a89594371fdeef0
Signed-off-by: Piotr Sikora <piotrsikora@google.com>
Reviewed-on: https://boringssl-review.googlesource.com/6462
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/crypto/bio/pair.c b/crypto/bio/pair.c
index 6f78890..fba4be2 100644
--- a/crypto/bio/pair.c
+++ b/crypto/bio/pair.c
@@ -256,8 +256,8 @@
return 0;
}
+ assert(peer_b->len >= bytes_read);
peer_b->len -= bytes_read;
- assert(peer_b->len >= 0);
assert(peer_b->offset + bytes_read <= peer_b->size);
/* Move read offset. If zero_copy_write_lock == 1 we must advance the
