[dpdk-dev] [PATCH v4 7/9] mem: fix potential bad unmap
Anatoly Burakov
anatoly.burakov at intel.com
Fri Apr 27 19:07:08 CEST 2018
Previously, if mmap failed to map page address at requested
address, we were attempting to unmap the wrong address. Fix it
by unmapping our actual mapped address, and jump further to
avoid unmapping memory that is not allocated.
Coverity issue: 272602
Fixes: 582bed1e1d1d ("mem: support mapping hugepages at runtime")
Cc: anatoly.burakov at intel.com
Signed-off-by: Anatoly Burakov <anatoly.burakov at intel.com>
Acked-by: Bruce Richardson <bruce.richardson at intel.com>
---
lib/librte_eal/linuxapp/eal/eal_memalloc.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/lib/librte_eal/linuxapp/eal/eal_memalloc.c b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
index 604ce6d..a40cfd3 100644
--- a/lib/librte_eal/linuxapp/eal/eal_memalloc.c
+++ b/lib/librte_eal/linuxapp/eal/eal_memalloc.c
@@ -466,7 +466,8 @@ alloc_seg(struct rte_memseg *ms, void *addr, int socket_id,
}
if (va != addr) {
RTE_LOG(DEBUG, EAL, "%s(): wrong mmap() address\n", __func__);
- goto mapped;
+ munmap(va, alloc_sz);
+ goto resized;
}
rte_iova_t iova = rte_mem_virt2iova(addr);
--
2.7.4
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