Commit-ID: ac379835e820de27429b5c4eadf4c1b40320cff4 Gitweb: http://git.kernel.org/tip/ac379835e820de27429b5c4eadf4c1b40320cff4 Author: Andy Lutomirski <l...@amacapital.net> AuthorDate: Fri, 25 Jul 2014 16:27:01 -0700 Committer: H. Peter Anvin <h...@linux.intel.com> CommitDate: Fri, 25 Jul 2014 16:32:53 -0700
x86/vdso: Set VM_MAYREAD for the vvar vma The VVAR area can, obviously, be read; that is kind of the point. AFAIK this has no effect whatsoever unless x86 suddenly turns into a nommu architecture. Nonetheless, not setting it is suspicious. Reported-by: Nathan Lynch <nathan_ly...@mentor.com> Signed-off-by: Andy Lutomirski <l...@amacapital.net> Link: http://lkml.kernel.org/r/e4c8bf4bc2725bda22c4a4b7d0c82adcd8f8d9b8.1406330779.git.l...@amacapital.net Signed-off-by: H. Peter Anvin <h...@linux.intel.com> --- arch/x86/vdso/vma.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/vdso/vma.c b/arch/x86/vdso/vma.c index dbef622..970463b 100644 --- a/arch/x86/vdso/vma.c +++ b/arch/x86/vdso/vma.c @@ -138,7 +138,7 @@ static int map_vdso(const struct vdso_image *image, bool calculate_addr) vma = _install_special_mapping(mm, addr, -image->sym_vvar_start, - VM_READ, + VM_READ|VM_MAYREAD, &vvar_mapping); if (IS_ERR(vma)) { -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
