Date: Thu, 9 Jan 2020 11:58:26 +0000 (UTC) From: Eugene Grosbein <eugen@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r356551 - head/usr.sbin/arp Message-ID: <202001091158.009BwQgS042070@repo.freebsd.org>
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Author: eugen Date: Thu Jan 9 11:58:26 2020 New Revision: 356551 URL: https://svnweb.freebsd.org/changeset/base/356551 Log: 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: 240825 MFC after: 1 week Modified: head/usr.sbin/arp/arp.c Modified: head/usr.sbin/arp/arp.c ============================================================================== --- head/usr.sbin/arp/arp.c Thu Jan 9 10:26:36 2020 (r356550) +++ head/usr.sbin/arp/arp.c Thu Jan 9 11:58:26 2020 (r356551) @@ -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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