gpu/drm: Fix lock held when returning to user space.

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commit 4089e272ac upstream.

We need to call drm_modeset_acquire_fini() when drm_atomic_state_alloc()
failed or call drm_modeset_acquire_init() after drm_atomic_state_alloc()
succeeded.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Reported-by: syzbot <syzbot+6ea337c427f5083ebdf2@syzkaller.appspotmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/1547115571-21219-1-git-send-email-penguin-kernel@I-love.SAKURA.ne.jp
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Tetsuo Handa 2019-01-10 19:19:31 +09:00 • committed by Greg Kroah-Hartman

parent 94b2aec76d

commit fb298c0654

2 changed files with 3 additions and 4 deletions

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3

drivers/gpu/drm/drm_atomic_uapi.c

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4

drivers/gpu/drm/drm_mode_object.c

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