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-rw-r--r--net/bridge/br_netfilter_hooks.c4
-rw-r--r--net/bridge/br_vlan.c2
-rw-r--r--net/bridge/netfilter/ebt_among.c21
-rw-r--r--net/bridge/netfilter/ebtables.c40
4 files changed, 54 insertions, 13 deletions
diff --git a/net/bridge/br_netfilter_hooks.c b/net/bridge/br_netfilter_hooks.c
index 484f54150525..c2120eb889a9 100644
--- a/net/bridge/br_netfilter_hooks.c
+++ b/net/bridge/br_netfilter_hooks.c
@@ -214,7 +214,7 @@ static int br_validate_ipv4(struct net *net, struct sk_buff *skb)
iph = ip_hdr(skb);
if (unlikely(ip_fast_csum((u8 *)iph, iph->ihl)))
- goto inhdr_error;
+ goto csum_error;
len = ntohs(iph->tot_len);
if (skb->len < len) {
@@ -236,6 +236,8 @@ static int br_validate_ipv4(struct net *net, struct sk_buff *skb)
*/
return 0;
+csum_error:
+ __IP_INC_STATS(net, IPSTATS_MIB_CSUMERRORS);
inhdr_error:
__IP_INC_STATS(net, IPSTATS_MIB_INHDRERRORS);
drop:
diff --git a/net/bridge/br_vlan.c b/net/bridge/br_vlan.c
index 51935270c651..9896f4975353 100644
--- a/net/bridge/br_vlan.c
+++ b/net/bridge/br_vlan.c
@@ -168,6 +168,8 @@ static struct net_bridge_vlan *br_vlan_get_master(struct net_bridge *br, u16 vid
masterv = br_vlan_find(vg, vid);
if (WARN_ON(!masterv))
return NULL;
+ refcount_set(&masterv->refcnt, 1);
+ return masterv;
}
refcount_inc(&masterv->refcnt);
diff --git a/net/bridge/netfilter/ebt_among.c b/net/bridge/netfilter/ebt_among.c
index ce7152a12bd8..c5afb4232ecb 100644
--- a/net/bridge/netfilter/ebt_among.c
+++ b/net/bridge/netfilter/ebt_among.c
@@ -172,18 +172,35 @@ ebt_among_mt(const struct sk_buff *skb, struct xt_action_param *par)
return true;
}
+static bool poolsize_invalid(const struct ebt_mac_wormhash *w)
+{
+ return w && w->poolsize >= (INT_MAX / sizeof(struct ebt_mac_wormhash_tuple));
+}
+
static int ebt_among_mt_check(const struct xt_mtchk_param *par)
{
const struct ebt_among_info *info = par->matchinfo;
const struct ebt_entry_match *em =
container_of(par->matchinfo, const struct ebt_entry_match, data);
- int expected_length = sizeof(struct ebt_among_info);
+ unsigned int expected_length = sizeof(struct ebt_among_info);
const struct ebt_mac_wormhash *wh_dst, *wh_src;
int err;
+ if (expected_length > em->match_size)
+ return -EINVAL;
+
wh_dst = ebt_among_wh_dst(info);
- wh_src = ebt_among_wh_src(info);
+ if (poolsize_invalid(wh_dst))
+ return -EINVAL;
+
expected_length += ebt_mac_wormhash_size(wh_dst);
+ if (expected_length > em->match_size)
+ return -EINVAL;
+
+ wh_src = ebt_among_wh_src(info);
+ if (poolsize_invalid(wh_src))
+ return -EINVAL;
+
expected_length += ebt_mac_wormhash_size(wh_src);
if (em->match_size != EBT_ALIGN(expected_length)) {
diff --git a/net/bridge/netfilter/ebtables.c b/net/bridge/netfilter/ebtables.c
index 02c4b409d317..254ef9f49567 100644
--- a/net/bridge/netfilter/ebtables.c
+++ b/net/bridge/netfilter/ebtables.c
@@ -1641,7 +1641,8 @@ static int compat_match_to_user(struct ebt_entry_match *m, void __user **dstptr,
int off = ebt_compat_match_offset(match, m->match_size);
compat_uint_t msize = m->match_size - off;
- BUG_ON(off >= m->match_size);
+ if (WARN_ON(off >= m->match_size))
+ return -EINVAL;
if (copy_to_user(cm->u.name, match->name,
strlen(match->name) + 1) || put_user(msize, &cm->match_size))
@@ -1671,7 +1672,8 @@ static int compat_target_to_user(struct ebt_entry_target *t,
int off = xt_compat_target_offset(target);
compat_uint_t tsize = t->target_size - off;
- BUG_ON(off >= t->target_size);
+ if (WARN_ON(off >= t->target_size))
+ return -EINVAL;
if (copy_to_user(cm->u.name, target->name,
strlen(target->name) + 1) || put_user(tsize, &cm->match_size))
@@ -1902,7 +1904,8 @@ static int ebt_buf_add(struct ebt_entries_buf_state *state,
if (state->buf_kern_start == NULL)
goto count_only;
- BUG_ON(state->buf_kern_offset + sz > state->buf_kern_len);
+ if (WARN_ON(state->buf_kern_offset + sz > state->buf_kern_len))
+ return -EINVAL;
memcpy(state->buf_kern_start + state->buf_kern_offset, data, sz);
@@ -1915,7 +1918,8 @@ static int ebt_buf_add_pad(struct ebt_entries_buf_state *state, unsigned int sz)
{
char *b = state->buf_kern_start;
- BUG_ON(b && state->buf_kern_offset > state->buf_kern_len);
+ if (WARN_ON(b && state->buf_kern_offset > state->buf_kern_len))
+ return -EINVAL;
if (b != NULL && sz > 0)
memset(b + state->buf_kern_offset, 0, sz);
@@ -1992,8 +1996,10 @@ static int compat_mtw_from_user(struct compat_ebt_entry_mwt *mwt,
pad = XT_ALIGN(size_kern) - size_kern;
if (pad > 0 && dst) {
- BUG_ON(state->buf_kern_len <= pad);
- BUG_ON(state->buf_kern_offset - (match_size + off) + size_kern > state->buf_kern_len - pad);
+ if (WARN_ON(state->buf_kern_len <= pad))
+ return -EINVAL;
+ if (WARN_ON(state->buf_kern_offset - (match_size + off) + size_kern > state->buf_kern_len - pad))
+ return -EINVAL;
memset(dst + size_kern, 0, pad);
}
return off + match_size;
@@ -2043,7 +2049,8 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
if (ret < 0)
return ret;
- BUG_ON(ret < match32->match_size);
+ if (WARN_ON(ret < match32->match_size))
+ return -EINVAL;
growth += ret - match32->match_size;
growth += ebt_compat_entry_padsize();
@@ -2053,7 +2060,9 @@ static int ebt_size_mwt(struct compat_ebt_entry_mwt *match32,
if (match_kern)
match_kern->match_size = ret;
- WARN_ON(type == EBT_COMPAT_TARGET && size_left);
+ if (WARN_ON(type == EBT_COMPAT_TARGET && size_left))
+ return -EINVAL;
+
match32 = (struct compat_ebt_entry_mwt *) buf;
}
@@ -2109,6 +2118,15 @@ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base,
*
* offsets are relative to beginning of struct ebt_entry (i.e., 0).
*/
+ for (i = 0; i < 4 ; ++i) {
+ if (offsets[i] >= *total)
+ return -EINVAL;
+ if (i == 0)
+ continue;
+ if (offsets[i-1] > offsets[i])
+ return -EINVAL;
+ }
+
for (i = 0, j = 1 ; j < 4 ; j++, i++) {
struct compat_ebt_entry_mwt *match32;
unsigned int size;
@@ -2140,7 +2158,8 @@ static int size_entry_mwt(struct ebt_entry *entry, const unsigned char *base,
startoff = state->buf_user_offset - startoff;
- BUG_ON(*total < startoff);
+ if (WARN_ON(*total < startoff))
+ return -EINVAL;
*total -= startoff;
return 0;
}
@@ -2267,7 +2286,8 @@ static int compat_do_replace(struct net *net, void __user *user,
state.buf_kern_len = size64;
ret = compat_copy_entries(entries_tmp, tmp.entries_size, &state);
- BUG_ON(ret < 0); /* parses same data again */
+ if (WARN_ON(ret < 0))
+ goto out_unlock;
vfree(entries_tmp);
tmp.entries_size = size64;
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.