diff options
| author | Peter Zijlstra <peterz@infradead.org> | 2022-10-18 13:49:21 +0200 |
|---|---|---|
| committer | Peter Zijlstra <peterz@infradead.org> | 2022-10-20 17:10:27 +0200 |
| commit | 883bbbffa5a4ffd1915f8b42934dab81b7f87226 (patch) | |
| tree | 6d650ad1ce9df229da9d3786bfc26d38c4f9466f /arch/arm64/kernel/entry-ftrace.S | |
| parent | b5f1fc3184405ab955db1b86d41d8b744d07c12d (diff) | |
ftrace,kcfi: Separate ftrace_stub() and ftrace_stub_graph()
Different function signatures means they needs to be different
functions; otherwise CFI gets upset.
As triggered by the ftrace boot tests:
[] CFI failure at ftrace_return_to_handler+0xac/0x16c (target: ftrace_stub+0x0/0x14; expected type: 0x0a5d5347)
Fixes: 3c516f89e17e ("x86: Add support for CONFIG_CFI_CLANG")
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Tested-by: Mark Rutland <mark.rutland@arm.com>
Link: https://lkml.kernel.org/r/Y06dg4e1xF6JTdQq@hirez.programming.kicks-ass.net
Diffstat (limited to 'arch/arm64/kernel/entry-ftrace.S')
| -rw-r--r-- | arch/arm64/kernel/entry-ftrace.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm64/kernel/entry-ftrace.S b/arch/arm64/kernel/entry-ftrace.S index bd5df50e4643..795344ab4ec4 100644 --- a/arch/arm64/kernel/entry-ftrace.S +++ b/arch/arm64/kernel/entry-ftrace.S @@ -7,6 +7,7 @@ */ #include <linux/linkage.h> +#include <linux/cfi_types.h> #include <asm/asm-offsets.h> #include <asm/assembler.h> #include <asm/ftrace.h> @@ -294,10 +295,14 @@ SYM_FUNC_END(ftrace_graph_caller) #endif /* CONFIG_FUNCTION_GRAPH_TRACER */ #endif /* CONFIG_DYNAMIC_FTRACE_WITH_REGS */ -SYM_FUNC_START(ftrace_stub) +SYM_TYPED_FUNC_START(ftrace_stub) ret SYM_FUNC_END(ftrace_stub) +SYM_TYPED_FUNC_START(ftrace_stub_graph) + ret +SYM_FUNC_END(ftrace_stub_graph) + #ifdef CONFIG_FUNCTION_GRAPH_TRACER /* * void return_to_handler(void) |