| Date | Mon, 4 Jan 2021 17:58:27 -0500 | From | Sasha Levin <> | Subject | Re: [PATCH 5.10 01/63] net/sched: sch_taprio: reset child qdiscs before freeing them |
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On Mon, Jan 04, 2021 at 04:56:54PM +0100, Greg Kroah-Hartman wrote: >From: Davide Caratti <dcaratti@redhat.com> > >[ Upstream commit 44d4775ca51805b376a8db5b34f650434a08e556 ] > >syzkaller shows that packets can still be dequeued while taprio_destroy() >is running. Let sch_taprio use the reset() function to cancel the advance >timer and drop all skbs from the child qdiscs. > >Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler") >Link: https://syzkaller.appspot.com/bug?id=f362872379bf8f0017fb667c1ab158f2d1e764ae >Reported-by: syzbot+8971da381fb5a31f542d@syzkaller.appspotmail.com >Signed-off-by: Davide Caratti <dcaratti@redhat.com> >Acked-by: Vinicius Costa Gomes <vinicius.gomes@intel.com> >Link: https://lore.kernel.org/r/63b6d79b0e830ebb0283e020db4df3cdfdfb2b94.1608142843.git.dcaratti@redhat.com >Signed-off-by: Jakub Kicinski <kuba@kernel.org> >Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
I noticed that there's a fix for this patch going through netdev (but not yet in Linus's tree). The fix reads to me like it fixes a missed corner case by this patch rather than this patch being incorrect, so I'll leave this patch in. If anyone disagrees please speak up :)
-- Thanks, Sasha
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