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Yama: add PR_SET_PTRACER_ANY

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For a process to entirely disable Yama ptrace restrictions, it can use
the special PR_SET_PTRACER_ANY pid to indicate that any otherwise allowed
process may ptrace it. This is stronger than calling PR_SET_PTRACER with
pid "1" because it includes processes in external pid namespaces. This is
currently needed by the Chrome renderer, since its crash handler (Breakpad)
runs external to the renderer's pid namespace.

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Kees Cook
2012-02-14 16:48:09 -08:00
committed by James Morris
parent 3ab1aff894
commit bf06189e4d
3 changed files with 13 additions and 3 deletions
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include/linux/prctl.h
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@@ -119,5 +119,6 @@
* A value of 0 mean "no process".
*/
#define PR_SET_PTRACER 0x59616d61
# define PR_SET_PTRACER_ANY ((unsigned long)-1)
#endif /* _LINUX_PRCTL_H */