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* debug/recv_chk.c (__recv_chk): Always fail if request could

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overflow the buffer.
	* debug/recvfrom_chk.c (__recvfrom_chk): Likewise.
This commit is contained in:
Ulrich Drepper
2005-03-06 21:25:22 +00:00
parent 5dc2883e54
commit 84c33ccbbe
3 changed files with 9 additions and 13 deletions
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10
debug/recvfrom_chk.c
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@@ -24,12 +24,8 @@ ssize_t
__recvfrom_chk (int fd, void *buf, size_t n, size_t buflen, int flags,
__SOCKADDR_ARG addr, socklen_t *addr_len)
{
/* In case N is greater than BUFLEN, we read BUFLEN+1 bytes.
This might overflow the buffer but the damage is reduced to just
one byte. And the program will terminate right away. */
ssize_t nrecv = __recvfrom (fd, buf, MIN (n, buflen + 1), flags,
addr, addr_len);
if (nrecv > 0 && (size_t) nrecv > buflen)
if (n > buflen)
__chk_fail ();
return nrecv;
return __recvfrom (fd, buf, n, flags, addr, addr_len);
}