6.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Florian Westphal <fw@xxxxxxxxx>
[ Upstream commit 5e1be4cdc98c989d5387ce94ff15b5ad06a5b681 ]
Several instances of pipapo_resize() don't propagate allocation failures,
this causes a crash when fault injection is enabled for gfp_kernel slabs.
Fixes: 3c4287f62044 ("nf_tables: Add set type for arbitrary concatenation of ranges")
Signed-off-by: Florian Westphal <fw@xxxxxxxxx>
Reviewed-by: Stefano Brivio <sbrivio@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/netfilter/nft_set_pipapo.c | 13 ++++++++++---
1 file changed, 10 insertions(+), 3 deletions(-)
diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c
index 352180b123fc7..58bd514260b90 100644
--- a/net/netfilter/nft_set_pipapo.c
+++ b/net/netfilter/nft_set_pipapo.c
@@ -902,12 +902,14 @@ static void pipapo_lt_bits_adjust(struct nft_pipapo_field *f)
static int pipapo_insert(struct nft_pipapo_field *f, const uint8_t *k,
int mask_bits)
{
- int rule = f->rules++, group, ret, bit_offset = 0;
+ int rule = f->rules, group, ret, bit_offset = 0;
- ret = pipapo_resize(f, f->rules - 1, f->rules);
+ ret = pipapo_resize(f, f->rules, f->rules + 1);
if (ret)
return ret;
+ f->rules++;
+
for (group = 0; group < f->groups; group++) {
int i, v;
u8 mask;
@@ -1052,7 +1054,9 @@ static int pipapo_expand(struct nft_pipapo_field *f,
step++;
if (step >= len) {
if (!masks) {
- pipapo_insert(f, base, 0);
+ err = pipapo_insert(f, base, 0);
+ if (err < 0)
+ return err;
masks = 1;
}
goto out;
@@ -1235,6 +1239,9 @@ static int nft_pipapo_insert(const struct net *net, const struct nft_set *set,
else
ret = pipapo_expand(f, start, end, f->groups * f->bb);
+ if (ret < 0)
+ return ret;
+
if (f->bsize > bsize_max)
bsize_max = f->bsize;
--
2.40.1
