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Date:   Thu, 26 Mar 2020 13:49:25 +0000
From:   Al Viro <viro@zeniv.linux.org.uk>
To:     Michael Ellerman <mpe@ellerman.id.au>
Cc:     Sachin Sant <sachinp@linux.vnet.ibm.com>,
        linuxppc-dev@lists.ozlabs.org, linux-fsdevel@vger.kernel.org,
        Linux Next Mailing List <linux-next@vger.kernel.org>
Subject: Re: [powerpc] Intermittent crashes ( link_path_walk) with linux-next
Message-ID: <20200326134925.GP23230@ZenIV.linux.org.uk>
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 <87h7ybwdih.fsf@mpe.ellerman.id.au>
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On Thu, Mar 26, 2020 at 10:40:06PM +1100, Michael Ellerman wrote:

> > The code in question (link_path_walk() in fs/namei.c ) was recently changed by
> > following commit:
> >
> > commit 881386f7e46a: 
> >   link_path_walk(): sample parent's i_uid and i_mode for the last component
> 
> That and about 10 other commits.
> 
> Unless Al can give us a clue we'll need to bisect.

	Already fixed yesterday.  It's not link_path_walk(), it's handle_dots()
ignoring an error returned by step_into().

commit 5e3c3570ec97 is the broken one; commit 20971012f63e is its variant with the
fix folded in.  So next-20200325 has the bug and next-20200326 should have it
fixed.  Could you check the current -next and see if you still observe that crap?