diff options
| author | Florian Westphal <fw@strlen.de> | 2022-02-28 06:22:22 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-03-08 19:09:33 +0100 |
| commit | 4d05239203fa38ea8a6f31e228460da4cb17a71a (patch) | |
| tree | a6751935e4f7cd3c1ac16d7673e6ed876b7f8ea6 /include | |
| parent | 3b9ba964f77cbac7679379f82a6a08ddbef3bc33 (diff) | |
netfilter: nf_queue: fix possible use-after-free
commit c3873070247d9e3c7a6b0cf9bf9b45e8018427b1 upstream.
Eric Dumazet says:
The sock_hold() side seems suspect, because there is no guarantee
that sk_refcnt is not already 0.
On failure, we cannot queue the packet and need to indicate an
error. The packet will be dropped by the caller.
v2: split skb prefetch hunk into separate change
Fixes: 271b72c7fa82c ("udp: RCU handling for Unicast packets.")
Reported-by: Eric Dumazet <eric.dumazet@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/net/netfilter/nf_queue.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_queue.h b/include/net/netfilter/nf_queue.h index e770bba00066..b1d43894296a 100644 --- a/include/net/netfilter/nf_queue.h +++ b/include/net/netfilter/nf_queue.h @@ -37,7 +37,7 @@ void nf_register_queue_handler(struct net *net, const struct nf_queue_handler *q void nf_unregister_queue_handler(struct net *net); void nf_reinject(struct nf_queue_entry *entry, unsigned int verdict); -void nf_queue_entry_get_refs(struct nf_queue_entry *entry); +bool nf_queue_entry_get_refs(struct nf_queue_entry *entry); void nf_queue_entry_free(struct nf_queue_entry *entry); static inline void init_hashrandom(u32 *jhash_initval) |