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Date:   Thu, 28 Jul 2022 17:00:16 +0200
From:   Greg KH <gregkh@linuxfoundation.org>
To:     Christoph Hellwig <hch@lst.de>
Cc:     Tadeusz Struk <tadeusz.struk@linaro.org>, stable@vger.kernel.org,
        linux-block@vger.kernel.org, dm-devel@redhat.com,
        syzbot+4f441e6ca0fcad141421@syzkaller.appspotmail.com,
        Johannes Thumshirn <johannes.thumshirn@wdc.com>,
        Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>,
        Damien Le Moal <damien.lemoal@wdc.com>,
        Jens Axboe <axboe@kernel.dk>
Subject: Re: [PATCH 5.10 1/2] block: split bio_kmalloc from bio_alloc_bioset
Message-ID: <YuKkgPx2XF6rQnLq@kroah.com>
References: <20220718211226.506362-1-tadeusz.struk@linaro.org>
 <YtwM3uHugOOdDQZT@kroah.com>
 <YuKgW9BCNl8ChT/v@kroah.com>
 <20220728144520.GA18285@lst.de>
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On Thu, Jul 28, 2022 at 04:45:20PM +0200, Christoph Hellwig wrote:
> On Thu, Jul 28, 2022 at 04:42:35PM +0200, Greg KH wrote:
> > > > Link: https://syzkaller.appspot.com/bug?id=a3416231e37024a75f2b95bd95db0d8ce8132a84
> > > 
> > > Both now queued up, thanks.
> > 
> > As was just reported, this breaks things all over the place:
> > 	https://lore.kernel.org/r/219030d8-3408-cc9d-7aec-1fb14ab891ce@roeck-us.net
> > 
> > Note, I also had to add lots of fix-up patches on top of these two that
> > you missed, so odds are there are other fix-ups that I also missed.
> > 
> > Please go and test this again, and submit ALL patches that are needed
> > after they pass the proper testing and I will be glad to reconsider them
> > again.
> 
> Why did this even get backported?  It was a cleanup that required a lot
> of prep work, and should not by itself fix anything.

Looks like syzkaller is reporting something odd...

Tadeusz, how was this tested?

thanks,

greg k-h