From: Hillf Danton <hdanton@sina.com>
To: syzbot <syzbot+0f999d26a4fd79c3a23b@syzkaller.appspotmail.com>
Cc: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: Re: [syzbot] [dri?] KASAN: slab-use-after-free Read in drm_atomic_helper_wait_for_vblanks (2)
Date: Wed, 14 Feb 2024 09:32:36 +0800 [thread overview]
Message-ID: <20240214013238.304-1-hdanton@sina.com> (raw)
In-Reply-To: <000000000000ec4c32061143ec95@google.com>
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_client_modeset.c
+++ y/drivers/gpu/drm/drm_client_modeset.c
@@ -1062,6 +1062,7 @@ out_ctx:
return ret;
backoff:
+ cancel_work_sync(&state->commit_work);
drm_atomic_state_clear(state);
drm_modeset_backoff(&ctx);
--
next prev parent reply other threads:[~2024-02-14 1:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-12 10:50 [syzbot] [dri?] KASAN: slab-use-after-free Read in drm_atomic_helper_wait_for_vblanks (2) syzbot
2024-02-13 14:08 ` syzbot
2024-02-14 1:32 ` Hillf Danton [this message]
2024-02-14 2:01 ` syzbot
2024-02-14 3:39 ` Hillf Danton
2024-02-14 3:55 ` syzbot
2024-02-14 7:01 ` Hillf Danton
2024-02-14 7:26 ` syzbot
2024-02-14 11:18 ` Hillf Danton
2024-02-14 11:55 ` syzbot
2024-02-15 10:15 ` Edward Adam Davis
2024-02-15 10:39 ` syzbot
2024-02-15 13:02 ` [PATCH] drm/atomic-helpers: fix uaf in drm_atomic_helper_wait_for_vblanks Edward Adam Davis
2024-02-15 15:12 ` [PATCH v2] " Edward Adam Davis
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