5.15-stable review patch. If anyone has any objections, please let me know.
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From: Eric Dumazet edumazet@google.com
[ 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 edumazet@google.com Cc: wenxu wenxu@ucloud.cn Reviewed-by: David Ahern dsahern@kernel.org Link: https://lore.kernel.org/r/20231025141037.3448203-1-edumazet@google.com Signed-off-by: Paolo Abeni pabeni@redhat.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 e3f9d92460e7a..776bacc96242a 100644 --- a/include/net/flow.h +++ b/include/net/flow.h @@ -39,8 +39,8 @@ struct flowi_common { #define FLOWI_FLAG_SKIP_NH_OIF 0x04 __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 {