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From: Matthew Wilcox <willy@infradead.org>
To: Qian Cai <cai@lca.pw>
Cc: akpm@linux-foundation.org, esploit@protonmail.ch,
	jejb@linux.ibm.com, dgilbert@interlog.com,
	martin.petersen@oracle.com, linux-mm@kvack.org,
	linux-kernel@vger.kernel.org, walken@google.com,
	David.Woodhouse@intel.com
Subject: Re: [PATCH] rbtree: fix the red root
Date: Fri, 11 Jan 2019 10:16:00 -0800
Message-ID: <20190111181600.GJ6310@bombadil.infradead.org> (raw)
In-Reply-To: <1547230356.6911.23.camel@lca.pw>

On Fri, Jan 11, 2019 at 01:12:36PM -0500, Qian Cai wrote:
> On Fri, 2019-01-11 at 09:31 -0800, Matthew Wilcox wrote:
> > On Fri, Jan 11, 2019 at 11:51:45AM -0500, Qian Cai wrote:
> > > Reported-by: Esme <esploit@protonmail.ch>
> > > Signed-off-by: Qian Cai <cai@lca.pw>
> > 
> > What change introduced this bug?  We need a Fixes: line so the stable
> > people know how far to backport this fix.
> 
> It looks like,
> 
> Fixes: 6d58452dc06 (rbtree: adjust root color in rb_insert_color() only when
> necessary)
> 
> where it no longer always paint the root as black.
> 
> Also, copying this fix for the original author and reviewer.
> 
> https://lore.kernel.org/lkml/20190111165145.23628-1-cai@lca.pw/

Great, thanks!  We have a test-suite (lib/rbtree_test.c); could you add
a test to it that will reproduce this bug without your patch applied?


  reply index

Thread overview: 26+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <YrcPMrGmYbPe_xgNEV6Q0jqc5XuPYmL2AFSyeNmg1gW531bgZnBGfEUK5_ktqDBaNW37b-NP2VXvlliM7_PsBRhSfB649MaW1Ne7zT9lHc=@protonmail.ch>
2019-01-11 16:51 ` Qian Cai
2019-01-11 17:17   ` Joey Pabalinas
2019-01-11 17:31   ` Matthew Wilcox
2019-01-11 17:53     ` Joey Pabalinas
2019-01-11 18:12     ` Qian Cai
2019-01-11 18:16       ` Matthew Wilcox [this message]
2019-01-11 20:58         ` [PATCH v2] " Qian Cai
2019-01-11 23:16           ` Matthew Wilcox
2019-01-12  0:18             ` Qian Cai
2019-01-12  0:39               ` Esme
2019-01-11 23:47           ` David Lechner
2019-01-12  2:58             ` Michel Lespinasse
2019-01-14  2:20               ` David Lechner
2019-01-14  2:33                 ` Qian Cai
2019-01-14  3:07                   ` Esme
2019-01-14  3:52                     ` Douglas Gilbert
2019-01-14  3:59                       ` Esme
2019-01-14  4:52                         ` Douglas Gilbert
2019-01-14  6:23                           ` Esme
2019-01-14 15:45                             ` Qian Cai
2019-01-14 15:51                               ` Esme
2019-01-14 17:58                                 ` Qian Cai
2019-01-14 18:26                                   ` Douglas Gilbert
2019-01-15  5:31                             ` Qian Cai
2019-01-16 14:37                               ` Esme
2019-01-18 17:10                                 ` Qian Cai

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