Anton Protopopov 7a7d4237e3 bpf: Pack struct bpf_fib_lookup ... [ Upstream commit f917170072 ] The struct bpf_fib_lookup is supposed to be of size 64. A recent commit 59b418c706 ("bpf: Add a check for struct bpf_fib_lookup size") added a static assertion to check this property so that future changes to the structure will not accidentally break this assumption. As it immediately turned out, on some 32-bit arm systems, when AEABI=n, the total size of the structure was equal to 68, see [1]. This happened because the bpf_fib_lookup structure contains a union of two 16-bit fields: union { __u16 tot_len; __u16 mtu_result; }; which was supposed to compile to a 16-bit-aligned 16-bit field. On the aforementioned setups it was instead both aligned and padded to 32-bits. Declare this inner union as __attribute__((packed, aligned(2))) such that it always is of size 2 and is aligned to 16 bits. [1] https://lore.kernel.org/all/CA+G9fYtsoP51f-oP_Sp5MOq-Ffv8La2RztNpwvE6+R1VtFiLrw@mail.gmail.com/#t Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Fixes: e1850ea9bd ("bpf: bpf_fib_lookup return MTU value as output when looked up") Signed-off-by: Anton Protopopov <aspsk@isovalent.com> Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Link: https://lore.kernel.org/bpf/20240403123303.1452184-1-aspsk@isovalent.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2024-06-12 11:11:38 +02:00
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asm	asm-generic: Unify uapi bitsperlong.h for arm64, riscv and loongarch	2023-06-22 17:04:36 +02:00
asm-generic	tools headers UAPI: Sync files changed by new fchmodat2 and map_shadow_stack syscalls with the kernel sources	2023-09-13 08:24:51 -03:00
drm	tools headers UAPI: Update tools's copy of drm.h headers	2023-09-13 09:02:48 -03:00
linux	bpf: Pack struct bpf_fib_lookup	2024-06-12 11:11:38 +02:00
sound	tools include UAPI: Sync the sound/asound.h copy with the kernel sources	2023-07-14 10:33:50 -03:00