From: Jakub Kicinski Date: Sat, 10 Aug 2024 04:58:11 +0000 (-0700) Subject: Merge branch 'don-t-take-hw-uso-path-when-packets-can-t-be-checksummed-by-device' X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=d2438c16a6347f811ab0249330ee9e54fa3db6b0;p=linux.git Merge branch 'don-t-take-hw-uso-path-when-packets-can-t-be-checksummed-by-device' Jakub Sitnicki says: ==================== Don't take HW USO path when packets can't be checksummed by device This series addresses a recent regression report from syzbot [1]. After enabling UDP_SEGMENT for egress devices which don't support checksum offload [2], we need to tighten down the checks which let packets take the HW USO path. The fix consists of two parts: 1. don't let devices offer USO without checksum offload, and 2. force software USO fallback in presence of IPv6 extension headers. [1] https://lore.kernel.org/all/000000000000e1609a061d5330ce@google.com/ [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=10154dbded6d6a2fecaebdfda206609de0f121a9 v3: https://lore.kernel.org/r/20240807-udp-gso-egress-from-tunnel-v3-0-8828d93c5b45@cloudflare.com v2: https://lore.kernel.org/r/20240801-udp-gso-egress-from-tunnel-v2-0-9a2af2f15d8d@cloudflare.com v1: https://lore.kernel.org/r/20240725-udp-gso-egress-from-tunnel-v1-0-5e5530ead524@cloudflare.com ==================== Link: https://patch.msgid.link/20240808-udp-gso-egress-from-tunnel-v4-0-f5c5b4149ab9@cloudflare.com Signed-off-by: Jakub Kicinski --- d2438c16a6347f811ab0249330ee9e54fa3db6b0