Messages in this thread Patch in this message | | | From | Greg Kroah-Hartman <> | Subject | [PATCH 5.15 261/779] net: fix sk_wmem_schedule() and sk_rmem_schedule() errors | Date | Mon, 15 Aug 2022 19:58:25 +0200 |
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From: Eric Dumazet <edumazet@google.com>
[ Upstream commit 7c80b038d23e1f4c7fcc311f43f83b8c60e7fb80 ]
If sk->sk_forward_alloc is 150000, and we need to schedule 150001 bytes, we want to allocate 1 byte more (rounded up to one page), instead of 150001 :/
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Eric Dumazet <edumazet@google.com> Reviewed-by: Shakeel Butt <shakeelb@google.com> Acked-by: Soheil Hassas Yeganeh <soheil@google.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org> Signed-off-by: Sasha Levin <sashal@kernel.org> --- include/net/sock.h | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/include/net/sock.h b/include/net/sock.h index 819c53965ef3..e0a88bb0a58c 100644 --- a/include/net/sock.h +++ b/include/net/sock.h @@ -1507,19 +1507,23 @@ static inline bool sk_has_account(struct sock *sk) static inline bool sk_wmem_schedule(struct sock *sk, int size) { + int delta; + if (!sk_has_account(sk)) return true; - return size <= sk->sk_forward_alloc || - __sk_mem_schedule(sk, size, SK_MEM_SEND); + delta = size - sk->sk_forward_alloc; + return delta <= 0 || __sk_mem_schedule(sk, delta, SK_MEM_SEND); } static inline bool sk_rmem_schedule(struct sock *sk, struct sk_buff *skb, int size) { + int delta; + if (!sk_has_account(sk)) return true; - return size <= sk->sk_forward_alloc || - __sk_mem_schedule(sk, size, SK_MEM_RECV) || + delta = size - sk->sk_forward_alloc; + return delta <= 0 || __sk_mem_schedule(sk, delta, SK_MEM_RECV) || skb_pfmemalloc(skb); } -- 2.35.1
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