net: ping: do not abuse udp_poll()

[ Upstream commit 77d4b1d36926a9b8387c6b53eeba42bcaaffcea3 ]

Alexander reported various KASAN messages triggered in recent kernels

The problem is that ping sockets should not use udp_poll() in the first
place, and recent changes in UDP stack finally exposed this old bug.

Fixes: c319b4d76b9e ("net: ipv4: add IPPROTO_ICMP socket kind")
Fixes: 6d0bfe226116 ("net: ipv6: Add IPv6 support to the ping socket.")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: Sasha Levin <alexander.levin@verizon.com>
Cc: Solar Designer <solar@openwall.com>
Cc: Vasiliy Kulikov <segoon@openwall.com>
Cc: Lorenzo Colitti <lorenzo@google.com>
Acked-By: Lorenzo Colitti <lorenzo@google.com>
Tested-By: Lorenzo Colitti <lorenzo@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/include/net/ipv6.h b/include/net/ipv6.h
index 7f15f95..91afb4a 100644 (file)
--- a/include/net/ipv6.h
+++ b/include/net/ipv6.h
@@ -1001,6 +1001,7 @@ int inet6_hash_connect(struct inet_timewait_death_row *death_row,
  */
 extern const struct proto_ops inet6_stream_ops;
 extern const struct proto_ops inet6_dgram_ops;
+extern const struct proto_ops inet6_sockraw_ops;
 
 struct group_source_req;
 struct group_filter;

diff --git a/net/ipv4/af_inet.c b/net/ipv4/af_inet.c
index 971b947..f60fe82 100644 (file)
--- a/net/ipv4/af_inet.c
+++ b/net/ipv4/af_inet.c
@@ -1015,7 +1015,7 @@ static struct inet_protosw inetsw_array[] =
                .type =       SOCK_DGRAM,
                .protocol =   IPPROTO_ICMP,
                .prot =       &ping_prot,
-               .ops =        &inet_dgram_ops,
+               .ops =        &inet_sockraw_ops,
                .flags =      INET_PROTOSW_REUSE,
        },
 

diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index 66e2d9d..9828681 100644 (file)
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -198,7 +198,7 @@ static struct inet_protosw pingv6_protosw = {
        .type =      SOCK_DGRAM,
        .protocol =  IPPROTO_ICMPV6,
        .prot =      &pingv6_prot,
-       .ops =       &inet6_dgram_ops,
+       .ops =       &inet6_sockraw_ops,
        .flags =     INET_PROTOSW_REUSE,
 };
 

diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 1a2fe5c..71ffa52 100644 (file)
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -1330,7 +1330,7 @@ void raw6_proc_exit(void)
 #endif /* CONFIG_PROC_FS */
 
 /* Same as inet6_dgram_ops, sans udp_poll.  */
-static const struct proto_ops inet6_sockraw_ops = {
+const struct proto_ops inet6_sockraw_ops = {
        .family            = PF_INET6,
        .owner             = THIS_MODULE,
        .release           = inet6_release,