Commit 19a2bdba authored by Rong Tao's avatar Rong Tao Committed by Daniel Borkmann
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samples/bpf: Fix wrong allocation size in xdp_router_ipv4_user 



prefix_key->data allocates three bytes using alloca(), but four bytes are
actually accessed in the program.

Signed-off-by: default avatarRong Tao <rongtao@cestc.cn>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/tencent_F9E2E81922B0C181D05B96DAE5AB0ACE6B06@qq.com
parent b74344cb

samples/bpf/xdp_router_ipv4_user.c

+1 −1
Original line number Diff line number Diff line
@@ -162,7 +162,7 @@ static void read_route(struct nlmsghdr *nh, int nll) 
				__be32 gw;

			} *prefix_value;



			prefix_key = alloca(sizeof(*prefix_key) + 3);

			prefix_key = alloca(sizeof(*prefix_key) + 4);

			prefix_value = alloca(sizeof(*prefix_value));



			prefix_key->prefixlen = 32;