diff options
| author | Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com> | 2022-11-28 18:57:15 +0300 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2022-12-28 13:28:11 +0300 |
| commit | 937c783aa3d8d77963ec91918d3298edb45b9161 (patch) | |
| tree | 5789cf3d4f30f1b475efbb6e28a1538ea56dada0 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 81931012bd7dc52fadf2b720605fce8a7148d4a7 (diff) | |
| download | linux-937c783aa3d8d77963ec91918d3298edb45b9161.tar.xz | |
vduse: Validate vq_num in vduse_validate_config()
Add a limit to 'config->vq_num' which is user controlled data which
comes from an vduse_ioctl to prevent large memory allocations.
Micheal says - This limit is somewhat arbitrary.
However, currently virtio pci and ccw are limited to a 16 bit vq number.
While MMIO isn't it is also isn't used with lots of VQs due to
current lack of support for per-vq interrupts.
Thus, the 0xffff limit on number of VQs corresponding
to a 16-bit VQ number seems sufficient for now.
This is found using static analysis with smatch.
Suggested-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
Message-Id: <20221128155717.2579992-1-harshit.m.mogalapalli@oracle.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions