Messages in this thread | | | Subject | Re: [PATCH 1/1 v3] skbuff: Fix a potential race while recycling page_pool packets | From | patchwork-bot+netdevbpf@kernel ... | Date | Fri, 16 Jul 2021 18:50:04 +0000 |
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Hello:
This patch was applied to netdev/net.git (refs/heads/master):
On Fri, 16 Jul 2021 10:02:18 +0300 you wrote: > As Alexander points out, when we are trying to recycle a cloned/expanded > SKB we might trigger a race. The recycling code relies on the > pp_recycle bit to trigger, which we carry over to cloned SKBs. > If that cloned SKB gets expanded or if we get references to the frags, > call skb_release_data() and overwrite skb->head, we are creating separate > instances accessing the same page frags. Since the skb_release_data() > will first try to recycle the frags, there's a potential race between > the original and cloned SKB, since both will have the pp_recycle bit set. > > [...]
Here is the summary with links: - [1/1,v3] skbuff: Fix a potential race while recycling page_pool packets https://git.kernel.org/netdev/net/c/2cc3aeb5eccc
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