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Date: Sat, 17 Dec 2022 05:30:17 +0000 From: patchwork-bot+netdevbpf@...nel.org To: Subash Abhinov Kasiviswanathan <quic_subashab@...cinc.com> Cc: davem@...emloft.net, edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com, shmulik@...anetworks.com, willemb@...gle.com, alexanderduyck@...com, netdev@...r.kernel.org, daniel@...earbox.net, quic_stranche@...cinc.com Subject: Re: [PATCH net v2] skbuff: Account for tail adjustment during pull operations Hello: This patch was applied to netdev/net.git (master) by Jakub Kicinski <kuba@...nel.org>: On Wed, 14 Dec 2022 23:11:58 -0700 you wrote: > Extending the tail can have some unexpected side effects if a program uses > a helper like BPF_FUNC_skb_pull_data to read partial content beyond the > head skb headlen when all the skbs in the gso frag_list are linear with no > head_frag - > > kernel BUG at net/core/skbuff.c:4219! > pc : skb_segment+0xcf4/0xd2c > lr : skb_segment+0x63c/0xd2c > Call trace: > skb_segment+0xcf4/0xd2c > __udp_gso_segment+0xa4/0x544 > udp4_ufo_fragment+0x184/0x1c0 > inet_gso_segment+0x16c/0x3a4 > skb_mac_gso_segment+0xd4/0x1b0 > __skb_gso_segment+0xcc/0x12c > udp_rcv_segment+0x54/0x16c > udp_queue_rcv_skb+0x78/0x144 > udp_unicast_rcv_skb+0x8c/0xa4 > __udp4_lib_rcv+0x490/0x68c > udp_rcv+0x20/0x30 > ip_protocol_deliver_rcu+0x1b0/0x33c > ip_local_deliver+0xd8/0x1f0 > ip_rcv+0x98/0x1a4 > deliver_ptype_list_skb+0x98/0x1ec > __netif_receive_skb_core+0x978/0xc60 > > [...] Here is the summary with links: - [net,v2] skbuff: Account for tail adjustment during pull operations https://git.kernel.org/netdev/net/c/2d7afdcbc9d3 You are awesome, thank you! -- Deet-doot-dot, I am a bot. https://korg.docs.kernel.org/patchwork/pwbot.html
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