Re: [PATCH] nfsd: free nfsd_file by gc after adding it to lru list

cel
2025-01-14T19:40:11Z

From: Chuck Lever <chuck.lever@oracle.com>

On Mon, 13 Jan 2025 10:59:57 +0800, Li Lingfeng wrote:
> In nfsd_file_put, after inserting the nfsd_file into the nfsd_file_lru
> list, gc may be triggered in another thread and immediately release this
> nfsd_file, which will lead to a UAF when accessing this nfsd_file again.
>
> All the places where unhash is done will also perform lru_remove, so there
> is no need to do lru_remove separately here. After inserting the nfsd_file
> into the nfsd_file_lru list, it can be released by relying on gc.
>
> [...]

Applied to nfsd-testing, thanks!

Cc-stable tag added.

[1/1] nfsd: free nfsd_file by gc after adding it to lru list
commit: e57420be100ab3ff6d42992a37ce34f3e03d8d91

--
Chuck Lever