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ipv4: fail early when creating netdev named all or default

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We create a proc dir for each network device, this will cause
conflicts when the devices have name "all" or "default".

Rather than emitting an ugly kernel warning, we could just
fail earlier by checking the device name.

Reported-by: Stephane Chazelas <stephane.chazelas@gmail.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
WANG Cong
2014-07-25 15:25:08 -07:00
committed by David S. Miller
parent 9d7e3ea73c
commit 20e61da7ff
2 changed files with 33 additions and 9 deletions
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include/net/ip.h
+6
View File
@@ -216,6 +216,12 @@ static inline int inet_is_local_reserved_port(struct net *net, int port)
return 0;
return test_bit(port, net->ipv4.sysctl_local_reserved_ports);
}
static inline bool sysctl_dev_name_is_allowed(const char *name)
{
return strcmp(name, "default") != 0 && strcmp(name, "all") != 0;
}
#else
static inline int inet_is_local_reserved_port(struct net *net, int port)
{