diff options
| author | Phillip Potter <phil@philpotter.co.uk> | 2021-03-31 23:07:19 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-04-10 11:12:08 +0200 |
| commit | 19ab233989d0f7ab1de19a036e247afa4a0a1e9c (patch) | |
| tree | 2513acdfba7cf259f039e18c7d8e173a80b2eee8 /mm/memremap.c | |
| parent | 2954a6f12f250890ec2433cec03ba92784d613e8 (diff) | |
fbdev: zero-fill colormap in fbcmap.c
Use kzalloc() rather than kmalloc() for the dynamically allocated parts
of the colormap in fb_alloc_cmap_gfp, to prevent a leak of random kernel
data to userspace under certain circumstances.
Fixes a KMSAN-found infoleak bug reported by syzbot at:
https://syzkaller.appspot.com/bug?id=741578659feabd108ad9e06696f0c1f2e69c4b6e
Reported-by: syzbot+47fa9c9c648b765305b9@syzkaller.appspotmail.com
Cc: stable <stable@vger.kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210331220719.1499743-1-phil@philpotter.co.uk
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm/memremap.c')
0 files changed, 0 insertions, 0 deletions