diff options
| author | Janosch Frank <frankja@linux.ibm.com> | 2018-08-16 09:02:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-01 09:46:41 +0100 |
| commit | 3921d5b8a189e3f82d1f1b5c54f4b2ed5a7551f7 (patch) | |
| tree | dc7cf6876f0f662e2a0e6df533c8eef9c1093ed5 /kernel/sysctl.c | |
| parent | 3658ccbbac39cc634e357ee08ff46d0893cbc111 (diff) | |
s390/mm: Check for valid vma before zapping in gmap_discard
commit 1843abd03250115af6cec0892683e70cf2297c25 upstream.
Userspace could have munmapped the area before doing unmapping from
the gmap. This would leave us with a valid vmaddr, but an invalid vma
from which we would try to zap memory.
Let's check before using the vma.
Fixes: 1e133ab296f3 ("s390/mm: split arch/s390/mm/pgtable.c")
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Message-Id: <20180816082432.78828-1-frankja@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/sysctl.c')
0 files changed, 0 insertions, 0 deletions