diff options
| author | Herbert Xu | 2022-08-04 18:03:46 +0800 |
|---|---|---|
| committer | Steffen Klassert | 2022-08-05 10:22:14 +0200 |
| commit | ba953a9d89a00c078b85f4b190bc1dde66fe16b5 (patch) | |
| tree | 6545950098ca9ffbab9ff4c0e48f6c6abcf6313b /net/key | |
| parent | 6aa811acdb76facca0b705f4e4c1d948ccb6af8b (diff) | |
af_key: Do not call xfrm_probe_algs in parallel
When namespace support was added to xfrm/afkey, it caused the
previously single-threaded call to xfrm_probe_algs to become
multi-threaded. This is buggy and needs to be fixed with a mutex.
Reported-by: Abhishek Shah <abhishek.shah@columbia.edu>
Fixes: 283bc9f35bbb ("xfrm: Namespacify xfrm state/policy locks")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
Diffstat (limited to 'net/key')
| -rw-r--r-- | net/key/af_key.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/key/af_key.c b/net/key/af_key.c index fb16d7c4e1b8..20e73643b9c8 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1697,9 +1697,12 @@ static int pfkey_register(struct sock *sk, struct sk_buff *skb, const struct sad pfk->registered |= (1<<hdr->sadb_msg_satype); } + mutex_lock(&pfkey_mutex); xfrm_probe_algs(); supp_skb = compose_sadb_supported(hdr, GFP_KERNEL | __GFP_ZERO); + mutex_unlock(&pfkey_mutex); + if (!supp_skb) { if (hdr->sadb_msg_satype != SADB_SATYPE_UNSPEC) pfk->registered &= ~(1<<hdr->sadb_msg_satype); |