Messages in this thread Patch in this message | | | From | Masami Hiramatsu <> | Subject | [PATCH -tip ] [BUGFIX] x86/kprobes: Prevent kprobes to probe on save_args | Date | Thu, 18 Nov 2010 19:16:55 +0900 |
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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 <masami.hiramatsu.pt@hitachi.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: x86@kernel.org Cc: linux-kernel@vger.kernel.org ---
arch/x86/kernel/entry_64.S | 2 ++ 1 files changed, 2 insertions(+), 0 deletions(-)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index fe2690d..e3ba417 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
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