4.14-stable review patch. If anyone has any objections, please let me know.
------------------ From: Masami Hiramatsu <[email protected]> commit c1804a236894ecc942da7dc6c5abe209e56cba93 upstream. Mark __x86_indirect_thunk_* functions as blacklist for kprobes because those functions can be called from anywhere in the kernel including blacklist functions of kprobes. Signed-off-by: Masami Hiramatsu <[email protected]> Signed-off-by: Thomas Gleixner <[email protected]> Acked-by: David Woodhouse <[email protected]> Cc: Andi Kleen <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Ananth N Mavinakayanahalli <[email protected]> Cc: Arjan van de Ven <[email protected]> Cc: Greg Kroah-Hartman <[email protected]> Link: https://lkml.kernel.org/r/151629209111.10241.5444852823378068683.stgit@devbox Signed-off-by: Greg Kroah-Hartman <[email protected]> --- arch/x86/lib/retpoline.S | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) --- a/arch/x86/lib/retpoline.S +++ b/arch/x86/lib/retpoline.S @@ -25,7 +25,8 @@ ENDPROC(__x86_indirect_thunk_\reg) * than one per register with the correct names. So we do it * the simple and nasty way... */ -#define EXPORT_THUNK(reg) EXPORT_SYMBOL(__x86_indirect_thunk_ ## reg) +#define __EXPORT_THUNK(sym) _ASM_NOKPROBE(sym); EXPORT_SYMBOL(sym) +#define EXPORT_THUNK(reg) __EXPORT_THUNK(__x86_indirect_thunk_ ## reg) #define GENERATE_THUNK(reg) THUNK reg ; EXPORT_THUNK(reg) GENERATE_THUNK(_ASM_AX)
