a7y18lte-ubports/android_kernel_samsung_a7y18lte
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

net: fix possible overflow in __sk_mem_raise_allocated()

Browse Source 
[ 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>
This commit is contained in:
Eric Dumazet 2019-02-12 12:26:27 -08:00 committed by prashantpaddune
parent 4a72273db6
commit 2a5cbb17f5
2 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
include/net/sock.h
View File

@ -1318,7 +1318,7 @@ static inline void sk_sockets_allocated_inc(struct sock *sk)
percpu_counter_inc(prot->sockets_allocated);
}
static inline int
static inline u64
sk_sockets_allocated_read_positive(struct sock *sk)
{
struct proto *prot = sk->sk_prot;

2
net/core/sock.c
View File

@ -2335,7 +2335,7 @@ int __sk_mem_schedule(struct sock *sk, int size, int kind)
}
if (sk_has_memory_pressure(sk)) {
int alloc;
u64 alloc;
if (!sk_under_memory_pressure(sk))
return 1;