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drm/vkms: Fix plane duplicate_state

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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;