R0dn3yS/android_kernel_xiaomi_sm7250
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

UPSTREAM: wireguard: queueing: use CFI-safe ptr_ring cleanup function

Browse Source 
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>
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
Change-Id: I3bf65df8cc99b0d6ba23d6347a8af7c113c1d98e
This commit is contained in:
Jason A. Donenfeld 2022-03-29 21:31:24 -04:00 committed by spakkkk
parent dd5960f64b
commit e5713d4226
1 changed files with 2 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/wireguard/queueing.c
View File

@ -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)