Messages in this thread | | | Subject | Re: [PATCH] block: fix syzbot report UAF in bdev_free_inode() | From | Tetsuo Handa <> | Date | Sat, 9 Oct 2021 18:34:43 +0900 |
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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@syzkaller.appspotmail.com > Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
Thanks. But my patch is ready for 5.15.
https://lore.kernel.org/all/e6dd13c5-8db0-4392-6e78-a42ee5d2a1c4@i-love.sakura.ne.jp/T/#u
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