[Linux-kernel-mentees] [PATCH net] ipvs: Fix uninit-value in do_ip_vs_set_ctl()
From: Peilin Ye <hidden>
Date: 2020-08-10 22:09:07
Also in:
linux-kernel-mentees, lkml, lvs-devel, netfilter-devel
Subsystem:
ipvs, netfilter, networking [general], the rest · Maintainers:
Simon Horman, Julian Anastasov, Pablo Neira Ayuso, Florian Westphal, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
do_ip_vs_set_ctl() is referencing uninitialized stack value when `len` is zero. Fix it. Reported-and-tested-by: syzbot+23b5f9e7caf61d9a3898@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?id=46ebfb92a8a812621a001ef04d90dfa459520fe2 Signed-off-by: Peilin Ye <redacted> --- net/netfilter/ipvs/ip_vs_ctl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/ipvs/ip_vs_ctl.c b/net/netfilter/ipvs/ip_vs_ctl.c
index 412656c34f20..c050b6a42786 100644
--- a/net/netfilter/ipvs/ip_vs_ctl.c
+++ b/net/netfilter/ipvs/ip_vs_ctl.c@@ -2418,7 +2418,7 @@ do_ip_vs_set_ctl(struct sock *sk, int cmd, void __user *user, unsigned int len) { struct net *net = sock_net(sk); int ret; - unsigned char arg[MAX_SET_ARGLEN]; + unsigned char arg[MAX_SET_ARGLEN] = {}; struct ip_vs_service_user *usvc_compat; struct ip_vs_service_user_kern usvc; struct ip_vs_service *svc;
--
2.25.1