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| author |   Kees Cook <keescook@chromium.org> | 2016-07-12 16:19:48 -0700 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2016-07-26 14:41:47 -0700 |
| commit | 0f60a8efe4005ab5e65ce000724b04d4ca04a199 (patch) | |
| tree | a71bc07c426721394f3156318b2220d8f6299c07 /include/linux/thread_info.h | |
| parent | mm: Add is_migrate_cma_page (diff) | |
| download | wireguard-linux-0f60a8efe4005ab5e65ce000724b04d4ca04a199.tar.xz wireguard-linux-0f60a8efe4005ab5e65ce000724b04d4ca04a199.zip | |
mm: Implement stack frame object validation
This creates per-architecture function arch_within_stack_frames() that
should validate if a given object is contained by a kernel stack frame.
Initial implementation is on x86.
This is based on code from PaX.
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'include/linux/thread_info.h')
| -rw-r--r-- | include/linux/thread_info.h | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/include/linux/thread_info.h b/include/linux/thread_info.h index b4c2a485b28a..3d5c80b4391d 100644 --- a/include/linux/thread_info.h +++ b/include/linux/thread_info.h @@ -146,6 +146,15 @@ static inline bool test_and_clear_restore_sigmask(void) #error "no set_restore_sigmask() provided and default one won't work" #endif +#ifndef CONFIG_HAVE_ARCH_WITHIN_STACK_FRAMES +static inline int arch_within_stack_frames(const void * const stack, + const void * const stackend, + const void *obj, unsigned long len) +{ + return 0; +} +#endif + #endif /* __KERNEL__ */ #endif /* _LINUX_THREAD_INFO_H */ |