From: Eric Dumazet edumazet@google.com
[ Upstream commit 5bf325a53202b8728cf7013b72688c46071e212e ]
With many active TCP sockets, fat TCP sockets could fool __sk_mem_raise_allocated() thanks to an overflow.
They would increase their share of the memory, instead of decreasing it.
Signed-off-by: Eric Dumazet edumazet@google.com Signed-off-by: David S. Miller davem@davemloft.net Signed-off-by: Sasha Levin sashal@kernel.org --- include/net/sock.h | 2 +- net/core/sock.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h index 0252c0d003104..4545a9ecc2193 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1272,7 +1272,7 @@ static inline void sk_sockets_allocated_inc(struct sock *sk) percpu_counter_inc(sk->sk_prot->sockets_allocated); }
-static inline int +static inline u64 sk_sockets_allocated_read_positive(struct sock *sk) { return percpu_counter_read_positive(sk->sk_prot->sockets_allocated); diff --git a/net/core/sock.c b/net/core/sock.c index 6c11078217769..f49bcaf1deefa 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -2435,7 +2435,7 @@ int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind) }
if (sk_has_memory_pressure(sk)) { - int alloc; + u64 alloc;
if (!sk_under_memory_pressure(sk)) return 1;