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Test for underflow before subtraction.

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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>
This commit is contained in:
Piotr Sikora 2015-11-10 21:20:12 -08:00 committed by Adam Langley
parent ef14b2d86e
commit d386394aad
1 changed files with 1 additions and 1 deletions
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2
crypto/bio/pair.c
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@ -256,8 +256,8 @@ int BIO_zero_copy_get_read_buf_done(BIO* bio, size_t bytes_read) {
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