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authorDaniel Vetter <daniel.vetter@ffwll.ch>2023-04-04 22:40:36 +0300
committerDaniel Vetter <daniel.vetter@ffwll.ch>2023-04-05 23:42:10 +0300
commit1935f0deb6116dd785ea64d8035eab0ff441255b (patch)
tree1a616fcfb84215ed9960bb7d9b763c278acf81a9 /drivers/gpu
parent77d08a2de6a43521f5a02848f11185b6f46af21c (diff)
downloadlinux-1935f0deb6116dd785ea64d8035eab0ff441255b.tar.xz
drm/fb-helper: set x/yres_virtual in drm_fb_helper_check_var
Drivers are supposed to fix this up if needed if they don't outright reject it. Uncovered by 6c11df58fd1a ("fbmem: Check virtual screen sizes in fb_set_var()"). Reported-by: syzbot+20dcf81733d43ddff661@syzkaller.appspotmail.com Link: https://syzkaller.appspot.com/bug?id=c5faf983bfa4a607de530cd3bb008888bf06cefc Cc: stable@vger.kernel.org # v5.4+ Cc: Daniel Vetter <daniel@ffwll.ch> Cc: Javier Martinez Canillas <javierm@redhat.com> Cc: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230404194038.472803-1-daniel.vetter@ffwll.ch
Diffstat (limited to 'drivers/gpu')
-rw-r--r--drivers/gpu/drm/drm_fb_helper.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c
index 63ec95e86d0e..aa9efc651a19 100644
--- a/drivers/gpu/drm/drm_fb_helper.c
+++ b/drivers/gpu/drm/drm_fb_helper.c
@@ -1589,6 +1589,9 @@ int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
return -EINVAL;
}
+ var->xres_virtual = fb->width;
+ var->yres_virtual = fb->height;
+
/*
* Workaround for SDL 1.2, which is known to be setting all pixel format
* fields values to zero in some cases. We treat this situation as a