From b95e68308c04e4da27d19a3152b049e58ad4ef23 Mon Sep 17 00:00:00 2001 From: Eric Dumazet Date: Wed, 25 Oct 2023 14:10:37 +0000 Subject: [PATCH] inet: shrink struct flowi_common [ Upstream commit 1726483b79a72e0150734d5367e4a0238bf8fcff ] I am looking at syzbot reports triggering kernel stack overflows involving a cascade of ipvlan devices. We can save 8 bytes in struct flowi_common. This patch alone will not fix the issue, but is a start. Fixes: 24ba14406c5c ("route: Add multipath_hash in flowi_common to make user-define hash") Signed-off-by: Eric Dumazet Cc: wenxu Reviewed-by: David Ahern Link: https://lore.kernel.org/r/20231025141037.3448203-1-edumazet@google.com Signed-off-by: Paolo Abeni Signed-off-by: Sasha Levin --- include/net/flow.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/net/flow.h b/include/net/flow.h index 7f0adda..335bbc5 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -40,8 +40,8 @@ struct flowi_common { #define FLOWI_FLAG_KNOWN_NH 0x02 __u32 flowic_secid; kuid_t flowic_uid; - struct flowi_tunnel flowic_tun_key; __u32 flowic_multipath_hash; + struct flowi_tunnel flowic_tun_key; }; union flowi_uli { -- 2.7.4