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Date: Wed, 13 Oct 2021 05:41:58 -0700 From: Luis Chamberlain <mcgrof@...nel.org> To: Kees Cook <keescook@...omium.org> Cc: tj@...nel.org, gregkh@...uxfoundation.org, akpm@...ux-foundation.org, minchan@...nel.org, jeyu@...nel.org, shuah@...nel.org, bvanassche@....org, dan.j.williams@...el.com, joe@...ches.com, tglx@...utronix.de, rostedt@...dmis.org, linux-spdx@...r.kernel.org, linux-doc@...r.kernel.org, linux-block@...r.kernel.org, linux-fsdevel@...r.kernel.org, linux-kselftest@...r.kernel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH v8 09/12] sysfs: fix deadlock race with module removal On Mon, Oct 11, 2021 at 03:26:02PM -0700, Luis Chamberlain wrote: > On Tue, Oct 05, 2021 at 01:50:31PM -0700, Kees Cook wrote: > > For example, why does this not work? > > It does for the write case for sure, I mispoke, just for the record, the changes you mentioned actually don't suffice for the test cases in question for test_sysfs, the deadlock still occurs with those changes. At first I thought it did but I had failed to remove my own fix first on fs/kernfs/dir.c. After removing that and just trying the proposed changes I confirm it does not fix the deadlock. Luis
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