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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-03-29 21:31:24 -0400 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2022-07-07 13:26:45 +0200 |
| commit | 2b7d2f34567a8e30fce64c6de66b312d2601ab1d (patch) | |
| tree | ef3944cb00fa93bb9702105c1000658f1c41e786 | |
| parent | f703a54ccfbd5c15d52eb7d8e9f8e8723dc8bb3e (diff) | |
| download | wireguard-linux-trimmed-2b7d2f34567a8e30fce64c6de66b312d2601ab1d.tar.gz wireguard-linux-trimmed-2b7d2f34567a8e30fce64c6de66b312d2601ab1d.zip | |
wireguard: queueing: use CFI-safe ptr_ring cleanup function
commit ec59f128a9bd4255798abb1e06ac3b442f46ef68 upstream.
We make too nuanced use of ptr_ring to entirely move to the skb_array
wrappers, but we at least should avoid the naughty function pointer cast
when cleaning up skbs. Otherwise RAP/CFI will honk at us. This patch
uses the __skb_array_destroy_skb wrapper for the cleanup, rather than
directly providing kfree_skb, which is what other drivers in the same
situation do too.
Reported-by: PaX Team <pageexec@freemail.hu>
Fixes: 886fcee939ad ("wireguard: receive: use ring buffer for incoming handshakes")
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
| -rw-r--r-- | drivers/net/wireguard/queueing.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/net/wireguard/queueing.c b/drivers/net/wireguard/queueing.c index 1de413b..8084e74 100644 --- a/drivers/net/wireguard/queueing.c +++ b/drivers/net/wireguard/queueing.c @@ -4,6 +4,7 @@ */ #include "queueing.h" +#include <linux/skb_array.h> struct multicore_worker __percpu * wg_packet_percpu_multicore_worker_alloc(work_func_t function, void *ptr) @@ -42,7 +43,7 @@ void wg_packet_queue_free(struct crypt_queue *queue, bool purge) { free_percpu(queue->worker); WARN_ON(!purge && !__ptr_ring_empty(&queue->ring)); - ptr_ring_cleanup(&queue->ring, purge ? (void(*)(void*))kfree_skb : NULL); + ptr_ring_cleanup(&queue->ring, purge ? __skb_array_destroy_skb : NULL); } #define NEXT(skb) ((skb)->prev) |