Thread (25 messages) flat view 25 messages, 4 authors, 2021-01-24
STALE2060d

Revision rfc of 2 in this series.

Revisions (2)
  1. rfc [diff vs current]
  2. rfc current

[RFC PATCH 4/7] tun: free bpf_program by bpf_prog_put instead of bpf_prog_destroy

From: Yuri Benditovich <hidden>
Date: 2021-01-12 19:43:52
Also in: bpf, kvm, lkml, virtualization
Subsystem: networking drivers, the rest, tun/tap driver · Maintainers: Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds, Willem de Bruijn, Jason Wang

The module never creates the bpf program with bpf_prog_create
so it shouldn't free it with bpf_prog_destroy.
The program is obtained by bpf_prog_get and should be freed
by bpf_prog_put. For BPF_PROG_TYPE_SOCKET_FILTER both
methods do the same but for other program types they don't.

Signed-off-by: Yuri Benditovich <redacted>
---
 drivers/net/tun.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 455f7afc1f36..18c1baf1a6c1 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -2218,7 +2218,7 @@ static void tun_prog_free(struct rcu_head *rcu)
 {
 	struct tun_prog *prog = container_of(rcu, struct tun_prog, rcu);
 
-	bpf_prog_destroy(prog->prog);
+	bpf_prog_put(prog->prog);
 	kfree(prog);
 }
 
-- 
2.17.1
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