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drm/vkms: Fix plane duplicate_state 

We need to handle allocation failures and bail out. While at it, tune
the allocation failures down to debug level.

syzbot injected an allocation failure and then hit this WARN_ON.

Reported-by: syzbot+eb6e5365f23c02517dda@syzkaller.appspotmail.com
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Cc: Haneen Mohammed <hamohammed.sa@gmail.com>
Cc: Sean Paul <seanpaul@chromium.org>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Rodrigo Siqueira <rodrigosiqueiramelo@gmail.com>
Cc: Gustavo Padovan <gustavo.padovan@collabora.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20181128101033.4840-1-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter 2018-11-28 11:10:33 +01:00
parent 45fdfdb647
commit 7cdf33ab02
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/vkms/vkms_plane.c
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@ -23,8 +23,11 @@ vkms_plane_duplicate_state(struct drm_plane *plane)
return NULL;
crc_data = kzalloc(sizeof(*crc_data), GFP_KERNEL);
if (WARN_ON(!crc_data))
DRM_INFO("Couldn't allocate crc_data");
if (!crc_data) {
DRM_DEBUG_KMS("Couldn't allocate crc_data\n");
kfree(vkms_state);
return NULL;
}
vkms_state->crc_data = crc_data;