diff options
| author | Phil Sutter <phil@nwl.cc> | 2023-02-21 18:36:01 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2023-11-02 11:56:19 +0100 |
| commit | 767e2ce2dcb3e0950feba8866f14cf02f963a2c4 (patch) | |
| tree | 825925b53133031fe1fa80ca5cb9efc5725382f6 /src | |
| parent | 26845bbcbabbcf1625b4b6e535a7e15a1206fe73 (diff) | |
netlink_delinearize: Sanitize concat data element decoding
commit 1344d9e53ba4d67cedd13a2c76a970fc7ce65683 upstream.
The call to netlink_get_register() might return NULL, catch this before
dereferencing the pointer.
Fixes: db59a5c1204c9 ("netlink_delinearize: fix decoding of concat data element")
Signed-off-by: Phil Sutter <phil@nwl.cc>
Acked-by: Florian Westphal <fw@strlen.de>
Diffstat (limited to 'src')
| -rw-r--r-- | src/netlink_delinearize.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/src/netlink_delinearize.c b/src/netlink_delinearize.c index fe3246b2..b413f60e 100644 --- a/src/netlink_delinearize.c +++ b/src/netlink_delinearize.c @@ -1661,7 +1661,7 @@ static void netlink_parse_dynset(struct netlink_parse_ctx *ctx, sreg_data = netlink_parse_register(nle, NFTNL_EXPR_DYNSET_SREG_DATA); expr_data = netlink_get_register(ctx, loc, sreg_data); - if (expr_data->len < set->data->len) { + if (expr_data && expr_data->len < set->data->len) { expr_free(expr_data); expr_data = netlink_parse_concat_expr(ctx, loc, sreg_data, set->data->len); if (expr_data == NULL) |