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SubjectRe: [syzbot] [dri?] KASAN: slab-use-after-free Read in drm_atomic_helper_wait_for_vblanks (2)
Date
On Tue, 13 Feb 2024 06:08:15 -0800
> HEAD commit: c664e16bb1ba Merge tag 'docs-6.8-fixes2' of git://git.lwn...
> git tree: upstream
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=11fcdba2180000

#syz test https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master

--- x/drivers/gpu/drm/drm_atomic_helper.c
+++ y/drivers/gpu/drm/drm_atomic_helper.c
@@ -1849,7 +1849,11 @@ static void commit_work(struct work_stru
struct drm_atomic_state *state = container_of(work,
struct drm_atomic_state,
commit_work);
+ struct drm_device *dev = state->dev;
+
+ mutex_lock(&dev->master_mutex);
commit_tail(state);
+ mutex_unlock(&dev->master_mutex);
}

/**
--
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