xen-netback: respect gnttab_map_refs()'s return value
Commit 3194a174 ("xen-netback: don't "handle" error by BUG()") dropped respective a BUG_ON() without noticing that with this the variable's value wouldn't be consumed anymore. With gnttab_set_map_op() setting all status fields to a non-zero value, in case of an error no slot should have a status of GNTST_okay (zero). This is part of XSA-367. Cc: <stable@vger.kernel.org> Reported-by:kernel test robot <lkp@intel.com> Signed-off-by:
Jan Beulich <jbeulich@suse.com> Reviewed-by:
Juergen Gross <jgross@suse.com> Link: https://lore.kernel.org/r/d933f495-619a-0086-5fb4-1ec3cf81a8fc@suse.com Signed-off-by:
Juergen Gross <jgross@suse.com>
parent
8310b77b