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Howlett" Cc: Marco Elver , syzbot , jannh@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, ljs@kernel.org, pfalcato@suse.de, syzkaller-bugs@googlegroups.com, vbabka@kernel.org Subject: Re: [syzbot] [mm?] KCSAN: data-race in mas_wr_store_entry / mtree_range_walk (2) Message-Id: <20260423093420.038ce8c6ffb45279d0a809a0@linux-foundation.org> In-Reply-To: <4ub4x275tpkop5jbx3l7p7zqeww32tb2yzhdgqqkvakri7dyih@bdxuedw5utlc> References: <69e1f975.050a0220.1de265.0009.GAE@google.com> <4ub4x275tpkop5jbx3l7p7zqeww32tb2yzhdgqqkvakri7dyih@bdxuedw5utlc> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Stat-Signature: fjg4g7njcb7fftnktriwmhgd18hszqmf X-Rspam-User: X-Rspamd-Queue-Id: 0CFE81C0013 X-Rspamd-Server: rspam05 X-HE-Tag: 1776962062-143991 X-HE-Meta: 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 9+I4oUP3 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, 20 Apr 2026 15:29:00 -0400 "Liam R. Howlett" wrote: > Link: https://lkml.kernel.org/r/20230628073657.75314-5-zhangpeng.00@bytedance.com > Signed-off-by: Peng Zhang > Reviewed-by: Liam R. Howlett > Signed-off-by: Andrew Morton > > So, you can see that the author of the initial code did look at race > conditions. I wanted to read the link for more information but that > link isn't working right now (403 error). lkml links are temporarily broken. Replacing "lkml.kernekl.org/r" with "lore.kernel.org" fixes it. https://lore.kernel.org/all/20230628073657.75314-5-zhangpeng.00@bytedance.com/