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| author |   Jan H. Schönherr <jschoenh@amazon.de> | 2017-09-04 16:00:50 +0200 |
|---|---|---|
| committer |   Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com> | 2017-09-04 16:00:50 +0200 |
| commit | b9a58de545858ac9ee67745cdea6d94cc322938e (patch) | |
| tree | 3bffbb1a4cad0c988e36620e9934421bb031d6c5 /tools/perf/scripts/python/stackcollapse.py | |
| parent | video: fbdev: make fb_videomode const (diff) | |
| download | wireguard-linux-b9a58de545858ac9ee67745cdea6d94cc322938e.tar.xz wireguard-linux-b9a58de545858ac9ee67745cdea6d94cc322938e.zip | |
vgacon: Prevent faulty bootparams.screeninfo from causing harm
If a zero for the number of colums or rows manages to slip through,
gotoxy() will underflow vc->vc_pos, causing the next action on the
referenced memory to end with a page fault.
Make the check in vgacon_startup() more pessimistic to prevent that.
Signed-off-by: Jan H. Schönherr <jschoenh@amazon.de>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions