3.2.89-rc1 review patch. If anyone has any objections, please let me know.
------------------ From: "K. Y. Srinivasan" <[email protected]> commit 372b1e91343e657a7cc5e2e2bcecd5140ac28119 upstream. The hypercall page only needs to be executable but currently it is setup to be writable as well. Fix the issue. Signed-off-by: K. Y. Srinivasan <[email protected]> Acked-by: Kees Cook <[email protected]> Reported-by: Stephen Hemminger <[email protected]> Tested-by: Stephen Hemminger <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]> [bwh: Backported to 3.2: adjust filename, context] Signed-off-by: Ben Hutchings <[email protected]> --- drivers/hv/hv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -178,7 +178,7 @@ int hv_init(void) /* See if the hypercall page is already set */ rdmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); - virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_EXEC); + virtaddr = __vmalloc(PAGE_SIZE, GFP_KERNEL, PAGE_KERNEL_RX); if (!virtaddr) goto cleanup;
