From: Paolo Abeni <pabeni@xxxxxxxxxx>
commit 69d93daec026cdda98e29e8edb12534bfa5b1a9b upstream.
Similar to commit 7c80b038d23e ("net: fix sk_wmem_schedule() and
sk_rmem_schedule() errors"), let the MPTCP receive path schedule
exactly the required amount of memory.
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Mat Martineau <mathew.j.martineau@xxxxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/mptcp/protocol.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/mptcp/protocol.c
+++ b/net/mptcp/protocol.c
@@ -323,9 +323,10 @@ static bool mptcp_rmem_schedule(struct s
struct mptcp_sock *msk = mptcp_sk(sk);
int amt, amount;
- if (size < msk->rmem_fwd_alloc)
+ if (size <= msk->rmem_fwd_alloc)
return true;
+ size -= msk->rmem_fwd_alloc;
amt = sk_mem_pages(size);
amount = amt << SK_MEM_QUANTUM_SHIFT;
msk->rmem_fwd_alloc += amount;
