Qihang Tang 21b5953e74 packet: use consistent hard_header_len in TX_RING send path ... tpacket_snd() reads dev->hard_header_len independently for skb allocation and header construction in tpacket_fill_skb(). Concurrent netdevice reconfiguration can therefore make the reserved headroom smaller than the amount later pushed, or make copylen - hard_header_len negative. Snapshot hard_header_len once before processing ring frames and use it for the frame limit, headroom allocation, copy length, and skb construction. Pass the snapshot to tpacket_fill_skb(). The separate SOCK_DGRAM consistency problem between hard_header_len and header_ops->create is not addressed here. Fixes: 69e3c75f4d ("net: TX_RING and packet mmap") Cc: stable@vger.kernel.org Signed-off-by: Qihang Tang <q.h.hack.winter@gmail.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Link: https://patch.msgid.link/20260805125729.19220-4-q.h.hack.winter@gmail.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>		2026-08-06 09:27:21 -07:00
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af_packet.c	packet: use consistent hard_header_len in TX_RING send path	2026-08-06 09:27:21 -07:00
diag.c	net: change sock.sk_ino and sock_i_ino() to u64	2026-03-06 14:31:26 +01:00
internal.h	net: af_packet: Use hrtimer to do the retire operation	2025-09-11 18:40:06 -07:00
Kconfig	treewide: replace '---help---' in Kconfig files with 'help'	2020-06-14 01:57:21 +09:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00