From: Guo Ren guoren@linux.alibaba.com
commit 5c3022e4a616d800cf5f4c3a981d7992179e44a1 upstream.
The 'retp' is a pointer to the return address on the stack, so we must pass the current return address pointer as the 'retp' argument to ftrace_push_return_trace(). Not parent function's return address on the stack.
Fixes: b785ec129bd9 ("riscv/ftrace: Add HAVE_FUNCTION_GRAPH_RET_ADDR_PTR support") Signed-off-by: Guo Ren guoren@linux.alibaba.com Signed-off-by: Guo Ren guoren@kernel.org Link: https://lore.kernel.org/r/20221109064937.3643993-2-guoren@kernel.org Cc: stable@vger.kernel.org Signed-off-by: Palmer Dabbelt palmer@rivosinc.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/riscv/kernel/stacktrace.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/riscv/kernel/stacktrace.c +++ b/arch/riscv/kernel/stacktrace.c @@ -60,7 +60,7 @@ void notrace walk_stackframe(struct task } else { fp = frame->fp; pc = ftrace_graph_ret_addr(current, NULL, frame->ra, - (unsigned long *)(fp - 8)); + &frame->ra); }
}