This is a note to let you know that I've just added the patch titled
inet: shrink struct flowi_common
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
inet-shrink-struct-flowi_common.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit b01450a0bc4970cf915acc6106b398c4bee7654f
Author: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Wed Oct 25 14:10:37 2023 +0000
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 <edumazet@xxxxxxxxxx>
Cc: wenxu <wenxu@xxxxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20231025141037.3448203-1-edumazet@xxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
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 {
