4.4-stable review patch. If anyone has any objections, please let me know.
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From: Masami Hiramatsu mhiramat@kernel.org
commit 70948c05fdde0aac32f9667856a88725c192fa40 upstream.
Prohibit probing on optimized_callback() because it is called from kprobes itself. If we put a kprobes on it, that will cause a recursive call loop. Mark it NOKPROBE_SYMBOL.
Fixes: 0dc016dbd820 ("ARM: kprobes: enable OPTPROBES for ARM 32") Signed-off-by: Masami Hiramatsu mhiramat@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Russell King rmk+kernel@armlinux.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/probes/kprobes/opt-arm.c | 1 + 1 file changed, 1 insertion(+)
--- a/arch/arm/probes/kprobes/opt-arm.c +++ b/arch/arm/probes/kprobes/opt-arm.c @@ -192,6 +192,7 @@ optimized_callback(struct optimized_kpro
local_irq_restore(flags); } +NOKPROBE_SYMBOL(optimized_callback)
int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig) {