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netfilter: x_tables: xt_compat_match_from_user doesn't need a retval 

Always returned 0.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
hifive-unleashed-5.1
Florian Westphal 2016-04-01 14:17:33 +02:00 committed by Pablo Neira Ayuso
parent 8dddd32756
commit 0188346f21
5 changed files with 26 additions and 51 deletions
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2
include/linux/netfilter/x_tables.h
View File

@ -484,7 +484,7 @@ void xt_compat_init_offsets(u_int8_t af, unsigned int number);
int xt_compat_calc_jump(u_int8_t af, unsigned int offset);
int xt_compat_match_offset(const struct xt_match *match);
int xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
unsigned int *size);
int xt_compat_match_to_user(const struct xt_entry_match *m,
void __user **dstptr, unsigned int *size);

17
net/ipv4/netfilter/arp_tables.c
View File

@ -1310,7 +1310,7 @@ out:
return ret;
}
static int
static void
compat_copy_entry_from_user(struct compat_arpt_entry *e, void **dstptr,
unsigned int *size,
struct xt_table_info *newinfo, unsigned char *base)
@ -1319,9 +1319,8 @@ compat_copy_entry_from_user(struct compat_arpt_entry *e, void **dstptr,
struct xt_target *target;
struct arpt_entry *de;
unsigned int origsize;
int ret, h;
int h;
ret = 0;
origsize = *size;
de = (struct arpt_entry *)*dstptr;
memcpy(de, e, sizeof(struct arpt_entry));
@ -1342,7 +1341,6 @@ compat_copy_entry_from_user(struct compat_arpt_entry *e, void **dstptr,
if ((unsigned char *)de - base < newinfo->underflow[h])
newinfo->underflow[h] -= origsize - *size;
}
return ret;
}
static int translate_compat_table(struct xt_table_info **pinfo,
@ -1421,16 +1419,11 @@ static int translate_compat_table(struct xt_table_info **pinfo,
entry1 = newinfo->entries;
pos = entry1;
size = compatr->size;
xt_entry_foreach(iter0, entry0, compatr->size) {
ret = compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
if (ret != 0)
break;
}
xt_entry_foreach(iter0, entry0, compatr->size)
compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
xt_compat_flush_offsets(NFPROTO_ARP);
xt_compat_unlock(NFPROTO_ARP);
if (ret)
goto free_newinfo;
ret = -ELOOP;
if (!mark_source_chains(newinfo, compatr->valid_hooks, entry1))

26
net/ipv4/netfilter/ip_tables.c
View File

@ -1568,7 +1568,7 @@ release_matches:
return ret;
}
static int
static void
compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
unsigned int *size,
struct xt_table_info *newinfo, unsigned char *base)
@ -1577,10 +1577,9 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
struct xt_target *target;
struct ipt_entry *de;
unsigned int origsize;
int ret, h;
int h;
struct xt_entry_match *ematch;
ret = 0;
origsize = *size;
de = (struct ipt_entry *)*dstptr;
memcpy(de, e, sizeof(struct ipt_entry));
@ -1589,11 +1588,9 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
*dstptr += sizeof(struct ipt_entry);
*size += sizeof(struct ipt_entry) - sizeof(struct compat_ipt_entry);
xt_ematch_foreach(ematch, e) {
ret = xt_compat_match_from_user(ematch, dstptr, size);
if (ret != 0)
return ret;
}
xt_ematch_foreach(ematch, e)
xt_compat_match_from_user(ematch, dstptr, size);
de->target_offset = e->target_offset - (origsize - *size);
t = compat_ipt_get_target(e);
target = t->u.kernel.target;
@ -1606,7 +1603,6 @@ compat_copy_entry_from_user(struct compat_ipt_entry *e, void **dstptr,
if ((unsigned char *)de - base < newinfo->underflow[h])
newinfo->underflow[h] -= origsize - *size;
}
return ret;
}
static int
@ -1729,16 +1725,12 @@ translate_compat_table(struct net *net,
entry1 = newinfo->entries;
pos = entry1;
size = compatr->size;
xt_entry_foreach(iter0, entry0, compatr->size) {
ret = compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
if (ret != 0)
break;
}
xt_entry_foreach(iter0, entry0, compatr->size)
compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
xt_compat_flush_offsets(AF_INET);
xt_compat_unlock(AF_INET);
if (ret)
goto free_newinfo;
ret = -ELOOP;
if (!mark_source_chains(newinfo, compatr->valid_hooks, entry1))

27
net/ipv6/netfilter/ip6_tables.c
View File

@ -1580,7 +1580,7 @@ release_matches:
return ret;
}
static int
static void
compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
unsigned int *size,
struct xt_table_info *newinfo, unsigned char *base)
@ -1588,10 +1588,9 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
struct xt_entry_target *t;
struct ip6t_entry *de;
unsigned int origsize;
int ret, h;
int h;
struct xt_entry_match *ematch;
ret = 0;
origsize = *size;
de = (struct ip6t_entry *)*dstptr;
memcpy(de, e, sizeof(struct ip6t_entry));
@ -1600,11 +1599,9 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
*dstptr += sizeof(struct ip6t_entry);
*size += sizeof(struct ip6t_entry) - sizeof(struct compat_ip6t_entry);
xt_ematch_foreach(ematch, e) {
ret = xt_compat_match_from_user(ematch, dstptr, size);
if (ret != 0)
return ret;
}
xt_ematch_foreach(ematch, e)
xt_compat_match_from_user(ematch, dstptr, size);
de->target_offset = e->target_offset - (origsize - *size);
t = compat_ip6t_get_target(e);
xt_compat_target_from_user(t, dstptr, size);
@ -1616,7 +1613,6 @@ compat_copy_entry_from_user(struct compat_ip6t_entry *e, void **dstptr,
if ((unsigned char *)de - base < newinfo->underflow[h])
newinfo->underflow[h] -= origsize - *size;
}
return ret;
}
static int compat_check_entry(struct ip6t_entry *e, struct net *net,
@ -1737,17 +1733,12 @@ translate_compat_table(struct net *net,
}
entry1 = newinfo->entries;
pos = entry1;
size = compatr->size;
xt_entry_foreach(iter0, entry0, compatr->size) {
ret = compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
if (ret != 0)
break;
}
xt_entry_foreach(iter0, entry0, compatr->size)
compat_copy_entry_from_user(iter0, &pos, &size,
newinfo, entry1);
xt_compat_flush_offsets(AF_INET6);
xt_compat_unlock(AF_INET6);
if (ret)
goto free_newinfo;
ret = -ELOOP;
if (!mark_source_chains(newinfo, compatr->valid_hooks, entry1))

5
net/netfilter/x_tables.c
View File

@ -526,8 +526,8 @@ int xt_compat_match_offset(const struct xt_match *match)
}
EXPORT_SYMBOL_GPL(xt_compat_match_offset);
int xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
unsigned int *size)
void xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
unsigned int *size)
{
const struct xt_match *match = m->u.kernel.match;
struct compat_xt_entry_match *cm = (struct compat_xt_entry_match *)m;
@ -549,7 +549,6 @@ int xt_compat_match_from_user(struct xt_entry_match *m, void **dstptr,
*size += off;
*dstptr += msize;
return 0;
}
EXPORT_SYMBOL_GPL(xt_compat_match_from_user);