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| author | Eric Dumazet <eric.dumazet@gmail.com> | 2009-10-30 05:03:53 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-10-30 12:25:12 -0700 |
| commit | 9d410c796067686b1e032d54ce475b7055537138 (patch) | |
| tree | 4442bdbe4a4be1cce024f2e83a12b7404ef935fa /net/sunrpc/svcsock.c | |
| parent | 63ca2d74ea4f9c7a7ac082c915609a7b224908e7 (diff) | |
| download | kernel_samsung_tuna-9d410c796067686b1e032d54ce475b7055537138.zip kernel_samsung_tuna-9d410c796067686b1e032d54ce475b7055537138.tar.gz kernel_samsung_tuna-9d410c796067686b1e032d54ce475b7055537138.tar.bz2 | |
net: fix sk_forward_alloc corruption
On UDP sockets, we must call skb_free_datagram() with socket locked,
or risk sk_forward_alloc corruption. This requirement is not respected
in SUNRPC.
Add a convenient helper, skb_free_datagram_locked() and use it in SUNRPC
Reported-by: Francis Moreau <francis.moro@gmail.com>
Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/sunrpc/svcsock.c')
| -rw-r--r-- | net/sunrpc/svcsock.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index ccc5e83..1c246a4 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -111,7 +111,7 @@ static void svc_release_skb(struct svc_rqst *rqstp) rqstp->rq_xprt_ctxt = NULL; dprintk("svc: service %p, releasing skb %p\n", rqstp, skb); - skb_free_datagram(svsk->sk_sk, skb); + skb_free_datagram_locked(svsk->sk_sk, skb); } } @@ -578,7 +578,7 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) "svc: received unknown control message %d/%d; " "dropping RPC reply datagram\n", cmh->cmsg_level, cmh->cmsg_type); - skb_free_datagram(svsk->sk_sk, skb); + skb_free_datagram_locked(svsk->sk_sk, skb); return 0; } @@ -588,18 +588,18 @@ static int svc_udp_recvfrom(struct svc_rqst *rqstp) if (csum_partial_copy_to_xdr(&rqstp->rq_arg, skb)) { local_bh_enable(); /* checksum error */ - skb_free_datagram(svsk->sk_sk, skb); + skb_free_datagram_locked(svsk->sk_sk, skb); return 0; } local_bh_enable(); - skb_free_datagram(svsk->sk_sk, skb); + skb_free_datagram_locked(svsk->sk_sk, skb); } else { /* we can use it in-place */ rqstp->rq_arg.head[0].iov_base = skb->data + sizeof(struct udphdr); rqstp->rq_arg.head[0].iov_len = len; if (skb_checksum_complete(skb)) { - skb_free_datagram(svsk->sk_sk, skb); + skb_free_datagram_locked(svsk->sk_sk, skb); return 0; } rqstp->rq_xprt_ctxt = skb; |