Re: [PATCH] block: fix syzbot report UAF in bdev_free_inode()

[zhangqiang]

On 2021/10/9 下午5:34, Tetsuo Handa wrote:
> On 2021/10/09 15:59, Zqiang wrote:
> > The xa_insert() may be return error in __alloc_disk_node(), and the disk
> > object will be release, however there are two operations that will release
> > it, kfree(disk) and iput(disk->part0->bd_inode), the iput operations
> > will call call_rcu(), because the rcu callback executed is an asynchronous
> > actionthe, so when free disk object in rcu callback, the disk object haven
> > been released. solve it through a unified release action.
> >
> > Reported-by: syzbot+8281086e8a6fbfbd952a@xxxxxxxxxxxxxxxxxxxxxxxxx
> > Signed-off-by: Zqiang <qiang.zhang1211@xxxxxxxxx>
> Thanks. But my patch is ready for 5.15.
>
> https://lore.kernel.org/all/e6dd13c5-8db0-4392-6e78-a42ee5d2a1c4@xxxxxxxxxxxxxxxxxxx/T/#u


Thanks, there is a problem with my patch, your path is more suitable