| From b562c171cf011d297059bd0265742eb5fab0ad2f Mon Sep 17 00:00:00 2001 |
| From: Kees Cook <keescook@chromium.org> |
| Date: Mon, 4 Dec 2017 17:24:54 -0800 |
| Subject: locking/refcounts: Do not force refcount_t usage as GPL-only export |
| |
| From: Kees Cook <keescook@chromium.org> |
| |
| commit b562c171cf011d297059bd0265742eb5fab0ad2f upstream. |
| |
| The refcount_t protection on x86 was not intended to use the stricter |
| GPL export. This adjusts the linkage again to avoid a regression in |
| the availability of the refcount API. |
| |
| Reported-by: Dave Airlie <airlied@gmail.com> |
| Fixes: 7a46ec0e2f48 ("locking/refcounts, x86/asm: Implement fast refcount overflow protection") |
| Signed-off-by: Kees Cook <keescook@chromium.org> |
| Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> |
| Cc: Ivan Kozik <ivan@ludios.org> |
| Cc: Thomas Backlund <tmb@mageia.org> |
| Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| |
| --- |
| arch/x86/mm/extable.c | 2 +- |
| 1 file changed, 1 insertion(+), 1 deletion(-) |
| |
| --- a/arch/x86/mm/extable.c |
| +++ b/arch/x86/mm/extable.c |
| @@ -82,7 +82,7 @@ bool ex_handler_refcount(const struct ex |
| |
| return true; |
| } |
| -EXPORT_SYMBOL_GPL(ex_handler_refcount); |
| +EXPORT_SYMBOL(ex_handler_refcount); |
| |
| /* |
| * Handler for when we fail to restore a task's FPU state. We should never get |
