Kuniyuki Iwashima e2bca4870f af_packet: Fix fortified memcpy() without flex array. ... Sergei Trofimovich reported a regression [0] caused by commit a0ade8404c ("af_packet: Fix warning of fortified memcpy() in packet_getname()."). It introduced a flex array sll_addr_flex in struct sockaddr_ll as a union-ed member with sll_addr to work around the fortified memcpy() check. However, a userspace program uses a struct that has struct sockaddr_ll in the middle, where a flex array is illegal to exist. include/linux/if_packet.h:24:17: error: flexible array member 'sockaddr_ll::<unnamed union>::<unnamed struct>::sll_addr_flex' not at end of 'struct packet_info_t' 24 | __DECLARE_FLEX_ARRAY(unsigned char, sll_addr_flex); | ^~~~~~~~~~~~~~~~~~~~ To fix the regression, let's go back to the first attempt [1] telling memcpy() the actual size of the array. Reported-by: Sergei Trofimovich <slyich@gmail.com> Closes: https://github.com/NixOS/nixpkgs/pull/252587#issuecomment-1741733002 [0] Link: https://lore.kernel.org/netdev/20230720004410.87588-3-kuniyu@amazon.com/ [1] Fixes: a0ade8404c ("af_packet: Fix warning of fortified memcpy() in packet_getname().") Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com> Link: https://lore.kernel.org/r/20231009153151.75688-1-kuniyu@amazon.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>		2023-10-12 09:15:15 +02:00
..
af_packet.c	af_packet: Fix fortified memcpy() without flex array.	2023-10-12 09:15:15 +02:00
diag.c	af_packet: Fix data-races of pkt_sk(sk)->num.	2023-05-25 21:03:23 -07:00
internal.h	net/packet: support mergeable feature of virtio	2023-04-21 12:01:58 +01:00
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