Re: KASAN: null-ptr-deref Write in bdi_put

[Jens Axboe]

On 3/1/21 5:56 AM, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 2d2f6f1b4799428d160c021dd652bc3e3593945e
> Author: Christoph Hellwig <hch@xxxxxx>
> Date:   Thu Jan 7 18:36:40 2021 +0000
> 
>     block: pre-initialize struct block_device in bdev_alloc_inode
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1424a5b6d00000
> start commit:   71c061d2 Merge tag 'for-5.11-rc2-tag' of git://git.kernel...
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=33b7f56c5bf0f684
> dashboard link: https://syzkaller.appspot.com/bug?extid=aded2f2ab94d81727898
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=143f7fc0d00000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1089023f500000
> 
> If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: block: pre-initialize struct block_device in bdev_alloc_inode


-- 
Jens Axboe