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Avoid buffer overflow.

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This commit is contained in:
christos 2006-09-29 17:02:04 +00:00
parent ab86520375
commit a0feefba6a
1 changed files with 6 additions and 2 deletions
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8
libexec/identd/identd.c
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@ -1,4 +1,4 @@
/* $NetBSD: identd.c,v 1.30 2006/09/29 15:49:29 christos Exp $ */
/* $NetBSD: identd.c,v 1.31 2006/09/29 17:02:04 christos Exp $ */
/*
* identd.c - TCP/IP Ident protocol server.
@ -8,7 +8,7 @@
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: identd.c,v 1.30 2006/09/29 15:49:29 christos Exp $");
__RCSID("$NetBSD: identd.c,v 1.31 2006/09/29 17:02:04 christos Exp $");
#include <sys/param.h>
#include <sys/socket.h>
@ -368,6 +368,10 @@ idhandle(int fd, const char *charset, const char *fmt, const char *osname,
* complete until we get a CRLF _at the end of the buffer_.
*/
qlen += n;
if (qlen >= sizeof(buf)) {
maybe_syslog(LOG_NOTICE, "recv: message too long");
exit(0);
}
if ((qlen >= 2) && (buf[qlen - 2] == '\r') &&
(buf[qlen - 1] == '\n'))
break;