提交 6af9263f 编写于 作者: M Masami Hiramatsu 提交者: Greg Kroah-Hartman

arm64: unwind: Prohibit probing on return_address()

[ Upstream commit ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9 ]

Prohibit probing on return_address() and subroutines which
is called from return_address(), since the it is invoked from
trace_hardirqs_off() which is also kprobe blacklisted.
Reported-by: NNaresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: NMasami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: NWill Deacon <will@kernel.org>
Signed-off-by: NSasha Levin <sashal@kernel.org>
上级 ffb1a76d
......@@ -11,6 +11,7 @@
#include <linux/export.h>
#include <linux/ftrace.h>
#include <linux/kprobes.h>
#include <asm/stack_pointer.h>
#include <asm/stacktrace.h>
......@@ -32,6 +33,7 @@ static int save_return_addr(struct stackframe *frame, void *d)
return 0;
}
}
NOKPROBE_SYMBOL(save_return_addr);
void *return_address(unsigned int level)
{
......@@ -55,3 +57,4 @@ void *return_address(unsigned int level)
return NULL;
}
EXPORT_SYMBOL_GPL(return_address);
NOKPROBE_SYMBOL(return_address);
......@@ -18,6 +18,7 @@
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/ftrace.h>
#include <linux/kprobes.h>
#include <linux/sched.h>
#include <linux/sched/debug.h>
#include <linux/sched/task_stack.h>
......@@ -85,6 +86,7 @@ int notrace unwind_frame(struct task_struct *tsk, struct stackframe *frame)
return 0;
}
NOKPROBE_SYMBOL(unwind_frame);
void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
int (*fn)(struct stackframe *, void *), void *data)
......@@ -99,6 +101,7 @@ void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
break;
}
}
NOKPROBE_SYMBOL(walk_stackframe);
#ifdef CONFIG_STACKTRACE
struct stack_trace_data {
......
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