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net: ping: do not abuse udp_poll()

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[ 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>
This commit is contained in:
Eric Dumazet 2017-06-03 09:29:25 -07:00 committed by Greg Kroah-Hartman
parent 406752726a
commit 45202cd219
4 changed files with 4 additions and 3 deletions
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1
include/net/ipv6.h
View File

@ -958,6 +958,7 @@ 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;

2
net/ipv4/af_inet.c
View File

@ -1014,7 +1014,7 @@ 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,
},

2
net/ipv6/ping.c
View File

@ -50,7 +50,7 @@ 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,
};

2
net/ipv6/raw.c
View File

@ -1303,7 +1303,7 @@ 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,