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| author |   Jiri Olsa <jolsa@kernel.org> | 2020-09-18 13:23:38 +0200 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2020-09-21 16:18:00 -0700 |
| commit | a8a717963fe5ecfd274eb93dd1285ee9428ffca7 (patch) | |
| tree | 62c0f3340551492668d4416a74cd26ba07242258 /kernel | |
| parent | bpf: Using rcu_read_lock for bpf_sk_storage_map iterator (diff) | |
| download | linux-dev-a8a717963fe5ecfd274eb93dd1285ee9428ffca7.tar.xz linux-dev-a8a717963fe5ecfd274eb93dd1285ee9428ffca7.zip | |
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 <ast@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200918112338.2618444-1-jolsa@kernel.org
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/trace/bpf_trace.c | 8 |
1 files changed, 8 insertions, 0 deletions
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) |