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| author | Herbert Xu <herbert@gondor.apana.org.au> | 2022-08-04 13:03:46 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-31 18:15:15 +0300 |
| commit | c5c4d4c9806dadac7bc82f9c29ef4e1b78894775 (patch) | |
| tree | 060b8ada009d31f7ceda5307ca80e0894a1c86fa /net/key | |
| parent | 4379a10c1db793ce39ea410e36ddc3099ec0694c (diff) | |
| download | linux-c5c4d4c9806dadac7bc82f9c29ef4e1b78894775.tar.xz | |
af_key: Do not call xfrm_probe_algs in parallel
[ Upstream commit ba953a9d89a00c078b85f4b190bc1dde66fe16b5 ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 2aa16a171285..05e271098888 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -1701,9 +1701,12 @@ 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); |