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| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-07-25 10:16:05 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-01 16:00:26 +0200 |
| commit | ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9 (patch) | |
| tree | 6f0ecb29969c6cb108496204de2b679b48e7afef | |
| parent | arm64: Lower priority mask for GIC_PRIO_IRQON (diff) | |
| download | linux-ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9.tar.xz linux-ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9.zip | |
arm64: unwind: Prohibit probing on return_address()
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: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
| -rw-r--r-- | arch/arm64/kernel/return_address.c | 3 | ||||
| -rw-r--r-- | arch/arm64/kernel/stacktrace.c | 3 |
2 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/kernel/return_address.c b/arch/arm64/kernel/return_address.c index c4ae647d2306..a5e8b3b9d798 100644 --- a/arch/arm64/kernel/return_address.c +++ b/arch/arm64/kernel/return_address.c @@ -8,6 +8,7 @@ #include <linux/export.h> #include <linux/ftrace.h> +#include <linux/kprobes.h> #include <asm/stack_pointer.h> #include <asm/stacktrace.h> @@ -29,6 +30,7 @@ static int save_return_addr(struct stackframe *frame, void *d) return 0; } } +NOKPROBE_SYMBOL(save_return_addr); void *return_address(unsigned int level) { @@ -49,3 +51,4 @@ void *return_address(unsigned int level) return NULL; } EXPORT_SYMBOL_GPL(return_address); +NOKPROBE_SYMBOL(return_address); diff --git a/arch/arm64/kernel/stacktrace.c b/arch/arm64/kernel/stacktrace.c index 2b160ae594eb..a336cb124320 100644 --- a/arch/arm64/kernel/stacktrace.c +++ b/arch/arm64/kernel/stacktrace.c @@ -7,6 +7,7 @@ #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> @@ -111,6 +112,7 @@ 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) @@ -125,6 +127,7 @@ void notrace walk_stackframe(struct task_struct *tsk, struct stackframe *frame, break; } } +NOKPROBE_SYMBOL(walk_stackframe); #ifdef CONFIG_STACKTRACE struct stack_trace_data { |