Date: Fri, 31 Jul 2015 01:12:32 +0000 (UTC) From: "Pedro F. Giffuni" <pfg@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r286102 - head/usr.bin/wall Message-ID: <201507310112.t6V1CWh8034232@repo.freebsd.org>
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Author: pfg Date: Fri Jul 31 01:12:31 2015 New Revision: 286102 URL: https://svnweb.freebsd.org/changeset/base/286102 Log: Buffer overflow in wall(1). This affected syslogd, wall and talkd. Detected by FORTIFY_SOURCE GSoC (with clang). Submitted by: Oliver Pinter Differential Revision: https://reviews.freebsd.org/D3254 Reviewed by: delphij, jmg MFC after: 3 days Modified: head/usr.bin/wall/ttymsg.c Modified: head/usr.bin/wall/ttymsg.c ============================================================================== --- head/usr.bin/wall/ttymsg.c Fri Jul 31 00:31:52 2015 (r286101) +++ head/usr.bin/wall/ttymsg.c Fri Jul 31 01:12:31 2015 (r286102) @@ -62,7 +62,7 @@ ttymsg(struct iovec *iov, int iovcnt, co struct iovec localiov[7]; ssize_t left, wret; int cnt, fd; - static char device[MAXNAMLEN] = _PATH_DEV; + char device[MAXNAMLEN] = _PATH_DEV; static char errbuf[1024]; char *p; int forked; @@ -71,8 +71,8 @@ ttymsg(struct iovec *iov, int iovcnt, co if (iovcnt > (int)(sizeof(localiov) / sizeof(localiov[0]))) return ("too many iov's (change code in wall/ttymsg.c)"); + strlcat(device, line, sizeof(device)); p = device + sizeof(_PATH_DEV) - 1; - strlcpy(p, line, sizeof(device)); if (strncmp(p, "pts/", 4) == 0) p += 4; if (strchr(p, '/') != NULL) {
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