Alexei Starovoitov 90caccdd8c bpf: fix bpf_tail_call() x64 JIT ... - bpf prog_array just like all other types of bpf array accepts 32-bit index. Clarify that in the comment. - fix x64 JIT of bpf_tail_call which was incorrectly loading 8 instead of 4 bytes - tighten corresponding check in the interpreter to stay consistent The JIT bug can be triggered after introduction of BPF_F_NUMA_NODE flag in commit 96eabe7a40 in 4.14. Before that the map_flags would stay zero and though JIT code is wrong it will check bounds correctly. Hence two fixes tags. All other JITs don't have this problem. Signed-off-by: Alexei Starovoitov <ast@kernel.org> Fixes: 96eabe7a40 ("bpf: Allow selecting numa node during map creation") Fixes: b52f00e6a7 ("x86: bpf_jit: implement bpf_tail_call() helper") Acked-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Reviewed-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-10-03 16:04:44 -07:00
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bpf_jit_comp.c	bpf: fix bpf_tail_call() x64 JIT	2017-10-03 16:04:44 -07:00
bpf_jit.S
Makefile	objtool, x86: Add several functions and files to the objtool whitelist	2017-06-30 10:19:19 +02:00