diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2019-07-25 17:16:05 +0900 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2019-08-01 15:00:26 +0100 |
| commit | ee07b93e7721ccd5d5b9fa6f0c10cb3fe2f1f4f9 (patch) | |
| tree | 6f0ecb29969c6cb108496204de2b679b48e7afef /arch/arm64/kernel/return_address.c | |
| parent | 677379bc9139ac24b310a281fcb21a2f04288353 (diff) | |
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>
Diffstat (limited to 'arch/arm64/kernel/return_address.c')
| -rw-r--r-- | arch/arm64/kernel/return_address.c | 3 |
1 files changed, 3 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); |