Messages in this thread | | | Subject | Re: [PATCH 4.19 21/57] proc: dont allow async path resolution of /proc/self components | From | Jens Axboe <> | Date | Tue, 2 Mar 2021 10:39:08 -0700 |
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On 3/2/21 1:40 AM, Yang Yingliang wrote: > Hi, > > On 2020/12/1 16:53, Greg Kroah-Hartman wrote: >> From: Jens Axboe <axboe@kernel.dk> >> >> [ Upstream commit 8d4c3e76e3be11a64df95ddee52e99092d42fc19 ] >> >> If this is attempted by a kthread, then return -EOPNOTSUPP as we don't >> currently support that. Once we can get task_pid_ptr() doing the right >> thing, then this can go away again. > > https://www.spinics.net/lists/io-uring/msg05297.html > > This patch seems used for io-wq worker which is merged in > > v5.5-rc1, why we need this in linux-4.19.y ?
While that's true, it's also a sane safeguard in general.
-- Jens Axboe
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