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bridge: netfilter: using strlcpy() instead of strncpy() 

'name' has already set all zero when it is defined, so not need let
strncpy() to pad it again.

'name' is a string, better always let is NUL terminated, so use
strlcpy() instead of strncpy().

Signed-off-by: Chen Gang <gang.chen@asianux.com>
Acked-by: Bart De Schuymer <bdschuym@pandora.be>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
hifive-unleashed-5.1
Chen Gang 2013-05-16 22:07:22 +00:00 committed by Pablo Neira Ayuso
parent 00028aa370
commit 8bc14d25ff
1 changed files with 3 additions and 3 deletions
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6
net/bridge/netfilter/ebtables.c
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@ -1339,7 +1339,7 @@ static inline int ebt_make_matchname(const struct ebt_entry_match *m,
/* ebtables expects 32 bytes long names but xt_match names are 29 bytes
long. Copy 29 bytes and fill remaining bytes with zeroes. */
strncpy(name, m->u.match->name, sizeof(name));
strlcpy(name, m->u.match->name, sizeof(name));
if (copy_to_user(hlp, name, EBT_FUNCTION_MAXNAMELEN))
return -EFAULT;
return 0;
@ -1351,7 +1351,7 @@ static inline int ebt_make_watchername(const struct ebt_entry_watcher *w,
char __user *hlp = ubase + ((char *)w - base);
char name[EBT_FUNCTION_MAXNAMELEN] = {};
strncpy(name, w->u.watcher->name, sizeof(name));
strlcpy(name, w->u.watcher->name, sizeof(name));
if (copy_to_user(hlp , name, EBT_FUNCTION_MAXNAMELEN))
return -EFAULT;
return 0;
@ -1377,7 +1377,7 @@ ebt_make_names(struct ebt_entry *e, const char *base, char __user *ubase)
ret = EBT_WATCHER_ITERATE(e, ebt_make_watchername, base, ubase);
if (ret != 0)
return ret;
strncpy(name, t->u.target->name, sizeof(name));
strlcpy(name, t->u.target->name, sizeof(name));
if (copy_to_user(hlp, name, EBT_FUNCTION_MAXNAMELEN))
return -EFAULT;
return 0;