[dpdk-dev] [PATCH v4] eal: out-of-bounds write

[Slawomir Mrozowicz]

Overrunning array mcfg->memseg of 256 44-byte elements
at element index 257 using index j.
Fixed by add condition with message information.

Fixes: af75078fece3 ("first public release")
Coverity ID 13282

Signed-off-by: Slawomir Mrozowicz <slawomirx.mrozowicz at intel.com>
---
 lib/librte_eal/linuxapp/eal/eal_memory.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/lib/librte_eal/linuxapp/eal/eal_memory.c b/lib/librte_eal/linuxapp/eal/eal_memory.c
index 5b9132c..19753b1 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memory.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memory.c
@@ -1301,6 +1301,15 @@ rte_eal_hugepage_init(void)
 			break;
 		}
 
+	if (j >= RTE_MAX_MEMSEG) {
+		RTE_LOG(ERR, EAL,
+			"Failed: all memsegs used by ivshmem.\n"
+			"Current %d is not enough.\n"
+			"Please either increase the RTE_MAX_MEMSEG\n",
+			RTE_MAX_MEMSEG);
+		return -ENOMEM;
+	}
+
 	for (i = 0; i < nr_hugefiles; i++) {
 		new_memseg = 0;
 
-- 
1.9.1