Messages in this thread | | | From | Dmitry Vyukov <> | Date | Thu, 19 May 2022 13:01:25 +0200 | Subject | Re: [syzbot] KASAN: use-after-free Read in bio_poll |
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On Tue, 10 May 2022 at 14:45, Jens Axboe <axboe@kernel.dk> wrote: > > On 5/9/22 11:50 PM, Christoph Hellwig wrote: > > On Tue, May 10, 2022 at 08:13:58AM +0800, Ming Lei wrote: > >>> Guys, should we just queue: > >>> > >>> ommit 9650b453a3d4b1b8ed4ea8bcb9b40109608d1faf > >>> Author: Ming Lei <ming.lei@redhat.com> > >>> Date: Wed Apr 20 22:31:10 2022 +0800 > >>> > >>> block: ignore RWF_HIPRI hint for sync dio > >>> > >>> up for 5.18 and stable? > >> > >> I am fine with merging to 5.18 & stable. > > > > I'm fine, too. But are we sure this actually is one and the same > > issue? Otherwise I'll try to find some time to feed it to syzbot > > first. > > I re-wrote the reproducer a bit and can reproduce it, so I can certainly > test a backport. But yes, I was skeptical on this being the same issue > too. My initial reaction was that this is likely due to the bio being > "downgraded" from polled to IRQ driven, and hence completes without an > extra reference before the bio_poll() is done on it. Which is not the > issue described in the referenced commit.
#syz fix: block: ignore RWF_HIPRI hint for sync dio
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