From a8a717963fe5ecfd274eb93dd1285ee9428ffca7 Mon Sep 17 00:00:00 2001 From: Jiri Olsa Date: Fri, 18 Sep 2020 13:23:38 +0200 Subject: selftests/bpf: Fix stat probe in d_path test Some kernels builds might inline vfs_getattr call within fstat syscall code path, so fentry/vfs_getattr trampoline is not called. Add security_inode_getattr to allowlist and switch the d_path test stat trampoline to security_inode_getattr. Keeping dentry_open and filp_close, because they are in their own files, so unlikely to be inlined, but in case they are, adding security_file_open. Adding flags that indicate trampolines were called and failing the test if any of them got missed, so it's easier to identify the issue next time. Fixes: e4d1af4b16f8 ("selftests/bpf: Add test for d_path helper") Suggested-by: Alexei Starovoitov Signed-off-by: Jiri Olsa Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20200918112338.2618444-1-jolsa@kernel.org --- kernel/trace/bpf_trace.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'kernel/trace') diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c index ebf9be4d0d6a..36508f46a8db 100644 --- a/kernel/trace/bpf_trace.c +++ b/kernel/trace/bpf_trace.c @@ -1114,6 +1114,14 @@ BPF_CALL_3(bpf_d_path, struct path *, path, char *, buf, u32, sz) } BTF_SET_START(btf_allowlist_d_path) +#ifdef CONFIG_SECURITY +BTF_ID(func, security_file_permission) +BTF_ID(func, security_inode_getattr) +BTF_ID(func, security_file_open) +#endif +#ifdef CONFIG_SECURITY_PATH +BTF_ID(func, security_path_truncate) +#endif BTF_ID(func, vfs_truncate) BTF_ID(func, vfs_fallocate) BTF_ID(func, dentry_open) -- cgit