6.6-stable review patch. If anyone has any objections, please let me know.
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From: Kuniyuki Iwashima kuniyu@google.com
[ Upstream commit 9d85c565a7b7c78b732393c02bcaa4d5c275fe58 ]
Initially, trace_sock_exceed_buf_limit() was invoked when __sk_mem_raise_allocated() failed due to the memcg limit or the global limit.
However, commit d6f19938eb031 ("net: expose sk wmem in sock_exceed_buf_limit tracepoint") somehow suppressed the event only when memcg failed to charge for SK_MEM_RECV, although the memcg failure for SK_MEM_SEND still triggers the event.
Let's restore the event for SK_MEM_RECV.
Signed-off-by: Kuniyuki Iwashima kuniyu@google.com Reviewed-by: Eric Dumazet edumazet@google.com Reviewed-by: Shakeel Butt shakeel.butt@linux.dev Link: https://patch.msgid.link/20250815201712.1745332-5-kuniyu@google.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/core/sock.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/net/core/sock.c b/net/core/sock.c index 9918a9a337b61..23c11c656dafa 100644 --- a/net/core/sock.c +++ b/net/core/sock.c @@ -3141,8 +3141,7 @@ int __sk_mem_raise_allocated(struct sock *sk, int size, int amt, int kind) } }
- if (kind == SK_MEM_SEND || (kind == SK_MEM_RECV && charged)) - trace_sock_exceed_buf_limit(sk, prot, allocated, kind); + trace_sock_exceed_buf_limit(sk, prot, allocated, kind);
sk_memory_allocated_sub(sk, amt);