From: Zhihong Wang <wangzhihong.wzh@bytedance.com>
To: konstantin.ananyev@intel.com, honnappa.nagarahalli@arm.com, dev@dpdk.org
Cc: Zhihong Wang <wangzhihong.wzh@bytedance.com>, stable@dpdk.org
Subject: [PATCH] ring: fix overflow in memory size calcuation
Date: Tue, 14 Dec 2021 11:30:16 +0800 [thread overview]
Message-ID: <20211214033016.29927-1-wangzhihong.wzh@bytedance.com> (raw)
Parameters count and esize are both unsigned int, and their product can
legally exceed unsigned int and lead to runtime access violation.
Fixes: cc4b218790f6 ("ring: support configurable element size")
Cc: stable@dpdk.org
Signed-off-by: Zhihong Wang <wangzhihong.wzh@bytedance.com>
---
lib/ring/rte_ring.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/ring/rte_ring.c b/lib/ring/rte_ring.c
index f17bd966be..d1b80597af 100644
--- a/lib/ring/rte_ring.c
+++ b/lib/ring/rte_ring.c
@@ -75,7 +75,7 @@ rte_ring_get_memsize_elem(unsigned int esize, unsigned int count)
return -EINVAL;
}
- sz = sizeof(struct rte_ring) + count * esize;
+ sz = sizeof(struct rte_ring) + (ssize_t)count * esize;
sz = RTE_ALIGN(sz, RTE_CACHE_LINE_SIZE);
return sz;
}
--
2.11.0
next reply other threads:[~2021-12-14 3:30 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-14 3:30 Zhihong Wang [this message]
2021-12-15 8:01 ` Liang Ma
2021-12-15 8:32 ` Morten Brørup
2021-12-15 13:18 ` Ananyev, Konstantin
2022-02-05 17:21 ` David Marchand
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