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[U-Boot,2/5] CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper functions

Message ID 1566398886-124791-2-git-send-email-liucheng32@huawei.com
State Accepted
Commit 741a8a08ebe5bc3ccfe3cde6c2b44ee53891af21
Delegated to: Joe Hershberger
Headers show
Series [U-Boot,1/5] CVE: net: fix unbounded memcpy of UDP packet | expand

Commit Message

liucheng (G) Aug. 21, 2019, 2:48 p.m. UTC 
CVE: nfs: fix stack-based buffer overflow in some nfs_handler reply helper functions

This patch adds a check to nfs_handler to fix buffer overflow for CVE-2019-14197,
CVE-2019-14200, CVE-2019-14201, CVE-2019-14202, CVE-2019-14203 and CVE-2019-14204.

Signed-off-by: Cheng Liu <liucheng32@huawei.com>
---
 net/nfs.c | 3 +++
 1 file changed, 3 insertions(+)
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Patch

diff --git a/net/nfs.c b/net/nfs.c
index d6a7f8e..b7cf3b3 100644
--- a/net/nfs.c
+++ b/net/nfs.c
@@ -732,6 +732,9 @@  static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
 
 	debug("%s\n", __func__);
 
+	if (len > sizeof(struct rpc_t))
+		return;
+
 	if (dest != nfs_our_port)
 		return;