diff options
| author | Omar Sandoval <osandov@fb.com> | 2017-02-01 00:02:27 -0800 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-06-05 21:17:22 +0100 |
| commit | 86222aa6b2ff9e5ba81d272d809b7401144548f0 (patch) | |
| tree | 70c6466611bfb9a0a0fc7245686fbb51a1ad963e /kernel | |
| parent | 522182342410708c54eb2b33ff36e85f0b045a6d (diff) | |
virtio-console: avoid DMA from stack
commit c4baad50297d84bde1a7ad45e50c73adae4a2192 upstream.
put_chars() stuffs the buffer it gets into an sg, but that buffer may be
on the stack. This breaks with CONFIG_VMAP_STACK=y (for me, it
manifested as printks getting turned into NUL bytes).
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions