Daniel Borkmann b7df9ada9a bpf: fix pointer offsets in context for 32 bit ... Currently, pointer offsets in three BPF context structures are broken in two scenarios: i) 32 bit compiled applications running on 64 bit kernels, and ii) LLVM compiled BPF programs running on 32 bit kernels. The latter is due to BPF target machine being strictly 64 bit. So in each of the cases the offsets will mismatch in verifier when checking / rewriting context access. Fix this by providing a helper macro __bpf_md_ptr() that will enforce padding up to 64 bit and proper alignment, and for context access a macro bpf_ctx_range_ptr() which will cover full 64 bit member range on 32 bit archs. For flow_keys, we additionally need to force the size check to sizeof(__u64) as with other pointer types. Fixes: d58e468b11 ("flow_dissector: implements flow dissector BPF hook") Fixes: 4f738adba3 ("bpf: create tcp_bpf_ulp allowing BPF to monitor socket TX/RX data") Fixes: 2dbb9b9e6d ("bpf: Introduce BPF_PROG_TYPE_SK_REUSEPORT") Reported-by: David S. Miller <davem@davemloft.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: David S. Miller <davem@davemloft.net> Tested-by: David S. Miller <davem@davemloft.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org>		2018-11-30 17:04:35 -08:00
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asm	tools, perf: add and use optimized ring_buffer_{read_head, write_tail} helpers	2018-10-19 13:43:08 -07:00
asm-generic	xarray: Add XArray marks	2018-10-21 10:45:57 -04:00
linux	Merge branch 'xarray' of git://git.infradead.org/users/willy/linux-dax	2018-10-28 11:35:40 -07:00
tools	tools: bpf: fix license for a compat header file	2018-09-19 23:49:58 +02:00
trace/events	tools/lib/lockdep: Remove private kernel headers	2017-06-05 09:28:14 +02:00
uapi	bpf: fix pointer offsets in context for 32 bit	2018-11-30 17:04:35 -08:00