With CONFIG_FUNCTION_GRAPH_TRACER, function return addresses are modified in ftrace_graph_caller and prepare_ftrace_return to redirect control flow to ftrace_return_to_handler. This is incompatible with return address protection. Signed-off-by: Sami Tolvanen <samitolvanen@xxxxxxxxxx> --- kernel/trace/Kconfig | 1 + 1 file changed, 1 insertion(+) diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig index e08527f50d2a..b7e5e3bfa0f4 100644 --- a/kernel/trace/Kconfig +++ b/kernel/trace/Kconfig @@ -161,6 +161,7 @@ config FUNCTION_GRAPH_TRACER depends on HAVE_FUNCTION_GRAPH_TRACER depends on FUNCTION_TRACER depends on !X86_32 || !CC_OPTIMIZE_FOR_SIZE + depends on ROP_PROTECTION_NONE default y help Enable the kernel to trace a function at both its return -- 2.23.0.866.gb869b98d4c-goog
