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xen: branch for v5.7-rc2

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Merge tag 'for-linus-5.7-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen update from Juergen Gross:

 - a small cleanup patch

 - a security fix for a bug in the Xen hypervisor to avoid enabling Xen
   guests to crash dom0 on an unfixed hypervisor.

* tag 'for-linus-5.7-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  arm/xen: make _xen_start_info static
  xen/xenbus: ensure xenbus_map_ring_valloc() returns proper grant status
This commit is contained in:
Linus Torvalds 2020-04-17 10:35:17 -07:00
commit d0a4ebe7d1
2 changed files with 9 additions and 2 deletions
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2
arch/arm/xen/enlighten.c
View File

@ -36,7 +36,7 @@
#include <linux/mm.h>
struct start_info _xen_start_info;
static struct start_info _xen_start_info;
struct start_info *xen_start_info = &_xen_start_info;
EXPORT_SYMBOL(xen_start_info);

9
drivers/xen/xenbus/xenbus_client.c
View File

@ -448,7 +448,14 @@ EXPORT_SYMBOL_GPL(xenbus_free_evtchn);
int xenbus_map_ring_valloc(struct xenbus_device *dev, grant_ref_t *gnt_refs,
unsigned int nr_grefs, void **vaddr)
{
return ring_ops->map(dev, gnt_refs, nr_grefs, vaddr);
int err;
err = ring_ops->map(dev, gnt_refs, nr_grefs, vaddr);
/* Some hypervisors are buggy and can return 1. */
if (err > 0)
err = GNTST_general_error;
return err;
}
EXPORT_SYMBOL_GPL(xenbus_map_ring_valloc);