5.15-stable review patch. If anyone has any objections, please let me know.
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From: Florian Westphal fw@strlen.de
[ Upstream commit 47b1c03c3c1a119435480a1e73f27197dc59131d ]
After next patch simple kfree() is not enough anymore, so add a helper for it.
Reviewed-by: Stefano Brivio sbrivio@redhat.com Signed-off-by: Florian Westphal fw@strlen.de Signed-off-by: Pablo Neira Ayuso pablo@netfilter.org Stable-dep-of: 5a8cdf6fd860 ("netfilter: nft_set_pipapo: remove scratch_aligned pointer") Signed-off-by: Sasha Levin sashal@kernel.org --- net/netfilter/nft_set_pipapo.c | 28 +++++++++++++++++++++++----- 1 file changed, 23 insertions(+), 5 deletions(-)
diff --git a/net/netfilter/nft_set_pipapo.c b/net/netfilter/nft_set_pipapo.c index fbd0dbf9b965..977bf724fb7e 100644 --- a/net/netfilter/nft_set_pipapo.c +++ b/net/netfilter/nft_set_pipapo.c @@ -1101,6 +1101,24 @@ static void pipapo_map(struct nft_pipapo_match *m, f->mt[map[i].to + j].e = e; }
+/** + * pipapo_free_scratch() - Free per-CPU map at original (not aligned) address + * @m: Matching data + * @cpu: CPU number + */ +static void pipapo_free_scratch(const struct nft_pipapo_match *m, unsigned int cpu) +{ + struct nft_pipapo_scratch *s; + void *mem; + + s = *per_cpu_ptr(m->scratch, cpu); + if (!s) + return; + + mem = s; + kfree(mem); +} + /** * pipapo_realloc_scratch() - Reallocate scratch maps for partial match results * @clone: Copy of matching data with pending insertions and deletions @@ -1133,7 +1151,7 @@ static int pipapo_realloc_scratch(struct nft_pipapo_match *clone, return -ENOMEM; }
- kfree(*per_cpu_ptr(clone->scratch, i)); + pipapo_free_scratch(clone, i);
*per_cpu_ptr(clone->scratch, i) = scratch;
@@ -1359,7 +1377,7 @@ static struct nft_pipapo_match *pipapo_clone(struct nft_pipapo_match *old) } out_scratch_realloc: for_each_possible_cpu(i) - kfree(*per_cpu_ptr(new->scratch, i)); + pipapo_free_scratch(new, i); #ifdef NFT_PIPAPO_ALIGN free_percpu(new->scratch_aligned); #endif @@ -1647,7 +1665,7 @@ static void pipapo_free_match(struct nft_pipapo_match *m) int i;
for_each_possible_cpu(i) - kfree(*per_cpu_ptr(m->scratch, i)); + pipapo_free_scratch(m, i);
#ifdef NFT_PIPAPO_ALIGN free_percpu(m->scratch_aligned); @@ -2249,7 +2267,7 @@ static void nft_pipapo_destroy(const struct nft_ctx *ctx, free_percpu(m->scratch_aligned); #endif for_each_possible_cpu(cpu) - kfree(*per_cpu_ptr(m->scratch, cpu)); + pipapo_free_scratch(m, cpu); free_percpu(m->scratch); pipapo_free_fields(m); kfree(m); @@ -2266,7 +2284,7 @@ static void nft_pipapo_destroy(const struct nft_ctx *ctx, free_percpu(priv->clone->scratch_aligned); #endif for_each_possible_cpu(cpu) - kfree(*per_cpu_ptr(priv->clone->scratch, cpu)); + pipapo_free_scratch(priv->clone, cpu); free_percpu(priv->clone->scratch);
pipapo_free_fields(priv->clone);