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| author |   Josef Bacik <jbacik@fb.com> | 2017-12-11 11:36:46 -0500 |
|---|---|---|
| committer |   Alexei Starovoitov <ast@kernel.org> | 2017-12-12 08:56:26 -0800 |
| commit | 92ace9991da08827e809c2d120108a96a281e7fc (patch) | |
| tree | f228d246aabb6d72e09d97684ff9a6ac6768c50a /include/linux/module.h | |
| parent | Merge branch 'bpf-tracing-multiprog-tp-query' (diff) | |
| download | linux-dev-92ace9991da08827e809c2d120108a96a281e7fc.tar.xz linux-dev-92ace9991da08827e809c2d120108a96a281e7fc.zip | |
add infrastructure for tagging functions as error injectable
Using BPF we can override kprob'ed functions and return arbitrary
values. Obviously this can be a bit unsafe, so make this feature opt-in
for functions. Simply tag a function with KPROBE_ERROR_INJECT_SYMBOL in
order to give BPF access to that function for error injection purposes.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to '')
| -rw-r--r-- | include/linux/module.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/module.h b/include/linux/module.h index c69b49abe877..548fa09fa806 100644 --- a/include/linux/module.h +++ b/include/linux/module.h @@ -475,6 +475,11 @@ struct module { ctor_fn_t *ctors; unsigned int num_ctors; #endif + +#ifdef CONFIG_BPF_KPROBE_OVERRIDE + unsigned int num_kprobe_ei_funcs; + unsigned long *kprobe_ei_funcs; +#endif } ____cacheline_aligned __randomize_layout; #ifndef MODULE_ARCH_INIT #define MODULE_ARCH_INIT {} |