* [PATCH] [BUGFIX] arm: kprobes: Prohibit probing on optimized_callback
@ 2018-02-23 15:02 Masami Hiramatsu
0 siblings, 0 replies; only message in thread
From: Masami Hiramatsu @ 2018-02-23 15:02 UTC (permalink / raw)
To: linux-arm-kernel
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>
---
arch/arm/probes/kprobes/opt-arm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/arm/probes/kprobes/opt-arm.c b/arch/arm/probes/kprobes/opt-arm.c
index ddc5a82eb10d..b2aa9b32bff2 100644
--- a/arch/arm/probes/kprobes/opt-arm.c
+++ b/arch/arm/probes/kprobes/opt-arm.c
@@ -192,6 +192,7 @@ optimized_callback(struct optimized_kprobe *op, struct pt_regs *regs)
local_irq_restore(flags);
}
+NOKPROBE_SYMBOL(optimized_callback)
int arch_prepare_optimized_kprobe(struct optimized_kprobe *op, struct kprobe *orig)
{
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2018-02-23 15:02 [PATCH] [BUGFIX] arm: kprobes: Prohibit probing on optimized_callback Masami Hiramatsu
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