From mboxrd@z Thu Jan 1 00:00:00 1970 From: Darek Stojaczyk Subject: [PATCH] ipc: fix undefined behavior in no-shconf mode Date: Wed, 24 Oct 2018 12:05:17 +0200 Message-ID: <20181024100517.17494-1-dariusz.stojaczyk@intel.com> Cc: Darek Stojaczyk , anatoly.burakov@intel.com, stable@dpdk.org To: dev@dpdk.org Return-path: List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" In no-shconf mode the rte_mp_request_sync() wasn't initializing the `reply` parameter, which contained e.g. a number of sent requests. Callers of rte_mp_request_sync() might check that param afterwards and might read potentially unitialized memory. The no-shconf check that makes us return early (with rc = 0) was placed before the `reply` initialization. Fix this by making the `reply` initialization occur first. Fixes: 5848e3d2813c ("ipc: support --no-shconf mode") Cc: anatoly.burakov@intel.com Cc: stable@dpdk.org Signed-off-by: Darek Stojaczyk --- lib/librte_eal/common/eal_common_proc.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/lib/librte_eal/common/eal_common_proc.c b/lib/librte_eal/common/eal_common_proc.c index 9fcb91219..97663d3ba 100644 --- a/lib/librte_eal/common/eal_common_proc.c +++ b/lib/librte_eal/common/eal_common_proc.c @@ -939,13 +939,17 @@ rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply, if (check_input(req) == false) return -1; + reply->nb_sent = 0; + reply->nb_received = 0; + reply->msgs = NULL; + if (internal_config.no_shconf) { RTE_LOG(DEBUG, EAL, "No shared files mode enabled, IPC is disabled\n"); return 0; } if (gettimeofday(&now, NULL) < 0) { - RTE_LOG(ERR, EAL, "Faile to get current time\n"); + RTE_LOG(ERR, EAL, "Failed to get current time\n"); rte_errno = errno; return -1; } @@ -954,10 +958,6 @@ rte_mp_request_sync(struct rte_mp_msg *req, struct rte_mp_reply *reply, end.tv_sec = now.tv_sec + ts->tv_sec + (now.tv_usec * 1000 + ts->tv_nsec) / 1000000000; - reply->nb_sent = 0; - reply->nb_received = 0; - reply->msgs = NULL; - /* for secondary process, send request to the primary process only */ if (rte_eal_process_type() == RTE_PROC_SECONDARY) { pthread_mutex_lock(&pending_requests.lock); -- 2.17.1