Yonghong Song 332270fdc8 bpf: enhance verifier to understand stack pointer arithmetic ... llvm 4.0 and above generates the code like below: .... 440: (b7) r1 = 15 441: (05) goto pc+73 515: (79) r6 = *(u64 *)(r10 -152) 516: (bf) r7 = r10 517: (07) r7 += -112 518: (bf) r2 = r7 519: (0f) r2 += r1 520: (71) r1 = *(u8 *)(r8 +0) 521: (73) *(u8 *)(r2 +45) = r1 .... and the verifier complains "R2 invalid mem access 'inv'" for insn #521. This is because verifier marks register r2 as unknown value after #519 where r2 is a stack pointer and r1 holds a constant value. Teach verifier to recognize "stack_ptr + imm" and "stack_ptr + reg with const val" as valid stack_ptr with new offset. Signed-off-by: Yonghong Song <yhs@fb.com> Acked-by: Martin KaFai Lau <kafai@fb.com> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>		2017-05-01 11:40:23 -04:00
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fault-injection	fault-injection: fix failcmd.sh warning	2012-07-31 18:42:38 -07:00
ktest	Greg Kroah-Hartman reported to me that the ktest of v4.10 locked up in an	2017-03-08 11:06:05 -08:00
nvdimm	tools/testing/nvdimm: make iset cookie predictable	2017-03-01 00:09:51 -08:00
radix-tree	radix tree test suite: Specify -m32 in LDFLAGS too	2017-03-07 13:18:24 -05:00
selftests	bpf: enhance verifier to understand stack pointer arithmetic	2017-05-01 11:40:23 -04:00