Date: Thu, 16 Jan 2020 08:11:45 +0000 (UTC) From: Eugene Grosbein <eugen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r356778 - stable/12/usr.sbin/arp Message-ID: <202001160811.00G8Bj3A057306@repo.freebsd.org>
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Author: eugen Date: Thu Jan 16 08:11:45 2020 New Revision: 356778 URL: https://svnweb.freebsd.org/changeset/base/356778 Log: MFC r356551: arp(8): avoid segfaulting due to out-of-bounds memory access Fix obvious mistake that sometimes results in reading memory past end of an array. PR: 242784 Modified: stable/12/usr.sbin/arp/arp.c Directory Properties: stable/12/ (props changed) Modified: stable/12/usr.sbin/arp/arp.c ============================================================================== --- stable/12/usr.sbin/arp/arp.c Thu Jan 16 07:02:09 2020 (r356777) +++ stable/12/usr.sbin/arp/arp.c Thu Jan 16 08:11:45 2020 (r356778) @@ -627,8 +627,7 @@ print_entry(struct sockaddr_dl *sdl, } else xo_emit("{d:/(incomplete)}{en:incomplete/true}"); - for (p = ifnameindex; p && ifnameindex->if_index && - ifnameindex->if_name; p++) { + for (p = ifnameindex; p && p->if_index && p->if_name; p++) { if (p->if_index == sdl->sdl_index) { xo_emit(" on {:interface/%s}", p->if_name); break;
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