Alexei Starovoitov 588a25e924 bpf: Fix extable address check. ... The verifier checks that PTR_TO_BTF_ID pointer is either valid or NULL, but it cannot distinguish IS_ERR pointer from valid one. When offset is added to IS_ERR pointer it may become small positive value which is a user address that is not handled by extable logic and has to be checked for at the runtime. Tighten BPF_PROBE_MEM pointer check code to prevent this case. Fixes: 4c5de12759 ("bpf: Emit explicit NULL pointer checks for PROBE_LDX instructions.") Reported-by: Lorenzo Fontana <lorenzo.fontana@elastic.co> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>		2021-12-16 21:41:04 +01:00
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bpf_jit_comp.c	bpf: Fix extable address check.	2021-12-16 21:41:04 +01:00
bpf_jit_comp32.c	bpf,x86: Respect X86_FEATURE_RETPOLINE*	2021-10-28 23:25:29 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00