diff options
| author | Masami Hiramatsu <[email protected]> | 2018-01-19 01:14:51 +0900 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2018-01-19 16:31:28 +0100 |
| commit | c1804a236894ecc942da7dc6c5abe209e56cba93 (patch) | |
| tree | 1f289f478870b7fa6adcf545db624a2017b29c5a | |
| parent | 736e80a4213e9bbce40a7c050337047128b472ac (diff) | |
kprobes/x86: Blacklist indirect thunk functions for kprobes
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]>
Cc: [email protected]
Link: https://lkml.kernel.org/r/151629209111.10241.5444852823378068683.stgit@devbox
| -rw-r--r-- | arch/x86/lib/retpoline.S | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/lib/retpoline.S b/arch/x86/lib/retpoline.S index d3415dc30f82..dfb2ba91b670 100644 --- 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) |