[dpdk-stable] [PATCH v2] eal: fix core number validation

[Hari kumar Vemula]

When incorrect core value or range provided,
as part of -l command line option, a crash occurs.

Added valid range checks to fix the crash.

Fixes: d888cb8b9613 ("eal: add core list input format")
Cc: stable at dpdk.org

--
v2: Replace strtoul with strtol
    Modified log message
--

Signed-off-by: Hari kumar Vemula <hari.kumarx.vemula at intel.com>
---
 lib/librte_eal/common/eal_common_options.c | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 6e3a83b98..b24668c23 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -592,7 +592,7 @@ eal_parse_corelist(const char *corelist)
 		if (*corelist == '\0')
 			return -1;
 		errno = 0;
-		idx = strtoul(corelist, &end, 10);
+		idx = strtol(corelist, &end, 10);
 		if (errno || end == NULL)
 			return -1;
 		while (isblank(*end))
@@ -603,6 +603,11 @@ eal_parse_corelist(const char *corelist)
 			max = idx;
 			if (min == RTE_MAX_LCORE)
 				min = idx;
+			if ((unsigned int)idx >= cfg->lcore_count ||
+					(unsigned int)min >= cfg->lcore_count) {
+				return -1;
+			}
+
 			for (idx = min; idx <= max; idx++) {
 				if (cfg->lcore_role[idx] != ROLE_RTE) {
 					cfg->lcore_role[idx] = ROLE_RTE;
@@ -1103,6 +1108,7 @@ eal_parse_common_option(int opt, const char *optarg,
 {
 	static int b_used;
 	static int w_used;
+	struct rte_config *cfg = rte_eal_get_configuration();
 
 	switch (opt) {
 	/* blacklist */
@@ -1145,7 +1151,9 @@ eal_parse_common_option(int opt, const char *optarg,
 	/* corelist */
 	case 'l':
 		if (eal_parse_corelist(optarg) < 0) {
-			RTE_LOG(ERR, EAL, "invalid core list\n");
+			RTE_LOG(ERR, EAL,
+				"Invalid core number given core range should be(0, %u)\n",
+					cfg->lcore_count-1);
 			return -1;
 		}
 
-- 
2.17.2