Author: delphij Date: Thu Jun 22 05:10:16 2017 New Revision: 320216 URL: https://svnweb.freebsd.org/changeset/base/320216
Log: Fix use-after-free introduced in r300388. In r300388, endnetconfig() was called on nc_handle which would release the associated netconfig structure, which means tmpnconf->nc_netid would be a use-after-free. Solve this by doing endnetconfig() in return paths instead. Reported by: jemalloc via kevlo Reviewed by: cem, ngie (earlier version) MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D11288 Modified: head/lib/libc/rpc/rpcb_clnt.c Modified: head/lib/libc/rpc/rpcb_clnt.c ============================================================================== --- head/lib/libc/rpc/rpcb_clnt.c Thu Jun 22 04:40:11 2017 (r320215) +++ head/lib/libc/rpc/rpcb_clnt.c Thu Jun 22 05:10:16 2017 (r320216) @@ -499,14 +499,15 @@ try_nconf: hostname = IN6_LOCALHOST_STRING; } } - endnetconfig(nc_handle); if (tmpnconf == NULL) { + endnetconfig(nc_handle); rpc_createerr.cf_stat = RPC_UNKNOWNPROTO; mutex_unlock(&loopnconf_lock); return (NULL); } loopnconf = getnetconfigent(tmpnconf->nc_netid); /* loopnconf is never freed */ + endnetconfig(nc_handle); } mutex_unlock(&loopnconf_lock); client = getclnthandle(hostname, loopnconf, NULL); _______________________________________________ svn-src-all@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
