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| author | K. Y. Srinivasan <kys@microsoft.com> | 2017-02-08 18:30:56 -0700 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-06-05 21:17:07 +0100 |
| commit | 43506f192fac83d06f6f8d78ceaccf4128cc6df9 (patch) | |
| tree | e3b172767a8ada558d8de228460358ffa13b1794 | |
| parent | b324f30944811716d304158cf1dc2178a041afe2 (diff) | |
| download | linux-stable-43506f192fac83d06f6f8d78ceaccf4128cc6df9.tar.gz linux-stable-43506f192fac83d06f6f8d78ceaccf4128cc6df9.tar.bz2 linux-stable-43506f192fac83d06f6f8d78ceaccf4128cc6df9.zip | |
drivers: hv: Turn off write permission on the hypercall page
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 <kys@microsoft.com>
Acked-by: Kees Cook <keescook@chromium.org>
Reported-by: Stephen Hemminger <stephen@networkplumber.org>
Tested-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
[bwh: Backported to 3.16: adjust filename, context]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
| -rw-r--r-- | drivers/hv/hv.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index b83afe484415..a8b9eea5c4fc 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -156,7 +156,7 @@ 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; |