From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sergio Gonzalez Monroy Subject: [PATCH 2/2] mempool: fix unsafe tailq element removal Date: Fri, 22 Jul 2016 17:01:18 +0100 Message-ID: <1469203278-91363-2-git-send-email-sergio.gonzalez.monroy@intel.com> References: <1469203278-91363-1-git-send-email-sergio.gonzalez.monroy@intel.com> Cc: thomas.monjalon@6wind.com To: dev@dpdk.org Return-path: Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by dpdk.org (Postfix) with ESMTP id 4413C558D for ; Fri, 22 Jul 2016 18:01:26 +0200 (CEST) In-Reply-To: <1469203278-91363-1-git-send-email-sergio.gonzalez.monroy@intel.com> List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Potentially user provided function could remove/free tailq elements. Doing so within a TAILQ_FOREACH loop is not safe. Use _SAFE versions of _FOREACH macros. Signed-off-by: Sergio Gonzalez Monroy --- lib/librte_mempool/rte_mempool.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/lib/librte_mempool/rte_mempool.c b/lib/librte_mempool/rte_mempool.c index 8806633..394154a 100644 --- a/lib/librte_mempool/rte_mempool.c +++ b/lib/librte_mempool/rte_mempool.c @@ -157,10 +157,10 @@ rte_mempool_obj_iter(struct rte_mempool *mp, rte_mempool_obj_cb_t *obj_cb, void *obj_cb_arg) { struct rte_mempool_objhdr *hdr; - void *obj; + void *obj, *temp; unsigned n = 0; - STAILQ_FOREACH(hdr, &mp->elt_list, next) { + STAILQ_FOREACH_SAFE(hdr, &mp->elt_list, next, temp) { obj = (char *)hdr + sizeof(*hdr); obj_cb(mp, obj_cb_arg, obj, n); n++; @@ -176,8 +176,9 @@ rte_mempool_mem_iter(struct rte_mempool *mp, { struct rte_mempool_memhdr *hdr; unsigned n = 0; + void *temp; - STAILQ_FOREACH(hdr, &mp->mem_list, next) { + STAILQ_FOREACH_SAFE(hdr, &mp->mem_list, next, temp) { mem_cb(mp, mem_cb_arg, hdr, n); n++; } @@ -1283,12 +1284,13 @@ void rte_mempool_walk(void (*func)(struct rte_mempool *, void *), { struct rte_tailq_entry *te = NULL; struct rte_mempool_list *mempool_list; + void *temp; mempool_list = RTE_TAILQ_CAST(rte_mempool_tailq.head, rte_mempool_list); rte_rwlock_read_lock(RTE_EAL_MEMPOOL_RWLOCK); - TAILQ_FOREACH(te, mempool_list, next) { + TAILQ_FOREACH_SAFE(te, mempool_list, next, temp) { (*func)((struct rte_mempool *) te->data, arg); } -- 2.4.11