From de31ec8a31046111befd16a7083e3bdda2ff42cf Mon Sep 17 00:00:00 2001 From: Masami Hiramatsu Date: Thu, 18 Nov 2010 19:16:55 +0900 Subject: [PATCH] x86/kprobes: Prevent kprobes to probe on save_args() Prevent kprobes to probe on save_args() since this function will be called from breakpoint exception handler. That will cause infinit loop on breakpoint handling. Signed-off-by: Masami Hiramatsu Cc: 2nddept-manager@sdl.hitachi.co.jp Cc: Ananth N Mavinakayanahalli LKML-Reference: <20101118101655.2779.2816.stgit@ltc236.sdl.hitachi.co.jp> Signed-off-by: Ingo Molnar --- arch/x86/kernel/entry_64.S | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index fe2690d71c0c..e3ba417e8697 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -295,6 +295,7 @@ ENDPROC(native_usergs_sysret64) .endm /* save partial stack frame */ + .pushsection .kprobes.text, "ax" ENTRY(save_args) XCPT_FRAME cld @@ -334,6 +335,7 @@ ENTRY(save_args) ret CFI_ENDPROC END(save_args) + .popsection ENTRY(save_rest) PARTIAL_FRAME 1 REST_SKIP+8 -- 2.20.1