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net: x25: fix one potential use-after-free issue

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The function x25_init is not properly unregister related resources
on error handler.It is will result in kernel oops if x25_init init
failed, so add properly unregister call on error handler.

Also, i adjust the coding style and make x25_register_sysctl properly
return failure.

Signed-off-by: linzhang <xiaolou4617@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
linzhang
2017-05-17 12:05:07 +08:00
committed by David S. Miller
parent 3c2ce60bdd
commit 64df6d525f
3 changed files with 22 additions and 11 deletions
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4
include/net/x25.h
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@@ -298,10 +298,10 @@ void x25_check_rbuf(struct sock *);
/* sysctl_net_x25.c */
#ifdef CONFIG_SYSCTL
void x25_register_sysctl(void);
int x25_register_sysctl(void);
void x25_unregister_sysctl(void);
#else
static inline void x25_register_sysctl(void) {};
static inline int x25_register_sysctl(void) { return 0; };
static inline void x25_unregister_sysctl(void) {};
#endif /* CONFIG_SYSCTL */