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BACKPORT: net: Make sock protocol value checks more specific

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SK_PROTOCOL_MAX is only used in two places, for DECNet and AX.25. The
limits have more to do with the those protocol definitions than they do
with the data type of sk_protocol, so remove SK_PROTOCOL_MAX and use
U8_MAX directly.

Reviewed-by: Eric Dumazet <edumazet@google.com>
Change-Id: Iff043154c9081bd274a73cb55895940f1873546f
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Mat Martineau 2020-01-09 07:59:14 -08:00 • committed by basamaryan
commit 19836e3a03
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2 changed files with 1 additions and 2 deletions
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1
include/net/sock.h
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@ -463,7 +463,6 @@ struct sock {
sk_userlocks : 4,
sk_protocol : 8,
sk_type : 16;
#define SK_PROTOCOL_MAX U8_MAX
u16 sk_gso_max_segs;
u8 sk_pacing_shift;
unsigned long sk_lingertime;

2
net/ax25/af_ax25.c
View file

@ -831,7 +831,7 @@ static int ax25_create(struct net *net, struct socket *sock, int protocol,
struct sock *sk;
ax25_cb *ax25;
if (protocol < 0 || protocol > SK_PROTOCOL_MAX)
if (protocol < 0 || protocol > U8_MAX)
return -EINVAL;
if (!net_eq(net, &init_net))