[PATCH v2 07/10] powerpc: Do not call __kernel_text_address() in show_instructions()
From: Murilo Opsfelder Araujo <hidden>
Date: 2018-07-27 14:59:37
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Modify show_instructions() not to call __kernel_text_address(), allowing userspace instruction dump. probe_kernel_address(), which returns -EFAULT if something goes wrong, is still being called. Signed-off-by: Murilo Opsfelder Araujo <redacted> --- arch/powerpc/kernel/process.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 25b562c21b7b..04960796fcce 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c@@ -1283,8 +1283,7 @@ static void show_instructions(struct pt_regs *regs) pc = (unsigned long)phys_to_virt(pc); #endif - if (!__kernel_text_address(pc) || - probe_kernel_address((unsigned int __user *)pc, instr)) { + if (probe_kernel_address((unsigned int __user *)pc, instr)) { pr_cont("XXXXXXXX "); } else { if (regs->nip == pc)
--
2.17.1