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| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-03-18 03:14:58 +0300 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2020-03-19 13:37:31 +0300 |
| commit | 772f4e82b3ffa1eb7412cd531f718a96a0e5474b (patch) | |
| tree | 02f124a9b7488b8365888fac325b09abff16cf7f /net/netfilter | |
| parent | 65038428b2c6c5be79d3f78a6b79c0cdc3a58a41 (diff) | |
| download | linux-772f4e82b3ffa1eb7412cd531f718a96a0e5474b.tar.xz | |
netfilter: nf_tables: fix double-free on set expression from the error path
After copying the expression to the set element extension, release the
expression and reset the pointer to avoid a double-free from the error
path.
Fixes: 409444522976 ("netfilter: nf_tables: add elements with stateful expressions")
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_tables_api.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/net/netfilter/nf_tables_api.c b/net/netfilter/nf_tables_api.c index f1910cd795fd..29ad33e52dbb 100644 --- a/net/netfilter/nf_tables_api.c +++ b/net/netfilter/nf_tables_api.c @@ -5133,6 +5133,7 @@ static int nft_add_set_elem(struct nft_ctx *ctx, struct nft_set *set, if (expr) { memcpy(nft_set_ext_expr(ext), expr, expr->ops->size); kfree(expr); + expr = NULL; } trans = nft_trans_elem_alloc(ctx, NFT_MSG_NEWSETELEM, set); |