The commit is pushed to "branch-rh9-5.14.0-162.6.1.vz9.18.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh9-5.14.0-162.6.1.vz9.18.2
------>
commit 139963820d564ff70963308a3ca50082e5b7bd89
Author: Menglong Dong <imaged...@tencent.com>
Date: Tue Jan 3 17:39:42 2023 +0200
net: skb: check the boundrary of drop reason in kfree_skb_reason()
Sometimes, we may forget to reset skb drop reason to NOT_SPECIFIED after
we make it the return value of the functions with return type of enum
skb_drop_reason, such as tcp_inbound_md5_hash. Therefore, its value can
be SKB_NOT_DROPPED_YET(0), which is invalid for kfree_skb_reason().
So we check the range of drop reason in kfree_skb_reason() with
DEBUG_NET_WARN_ON_ONCE().
Reviewed-by: Jiang Biao <benbji...@tencent.com>
Reviewed-by: Hao Peng <flyingp...@tencent.com>
Signed-off-by: Menglong Dong <imaged...@tencent.com>
Signed-off-by: David S. Miller <da...@davemloft.net>
Acked-by: Nikolay Borisov <nbori...@suse.com>
Signed-off-by: Nikolay Borisov <nikolay.bori...@virtuozzo.com>
======
Patchset description:
ms/net: Annotate skb free sites with reason
This series backports most of the patches that add a reason to skb free
sites.
https://jira.sw.ru/browse/PSBM-143302
Feature: net: improve verbosity of dropped packets reporting
---
net/core/skbuff.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/net/core/skbuff.c b/net/core/skbuff.c
index 9d45ad819ea7..2e067ec51ec6 100644
--- a/net/core/skbuff.c
+++ b/net/core/skbuff.c
@@ -774,6 +774,8 @@ void kfree_skb_reason(struct sk_buff *skb, enum
skb_drop_reason reason)
if (!skb_unref(skb))
return;
+ DEBUG_NET_WARN_ON_ONCE(reason <= 0 || reason >= SKB_DROP_REASON_MAX);
+
trace_kfree_skb(skb, __builtin_return_address(0), reason);
__kfree_skb(skb);
}
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