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Received: from willy by casper.infradead.org with local (Exim 4.94.2 #2 (Red Hat Linux)) id 1qP68A-007mTH-BQ; Thu, 27 Jul 2023 18:54:34 +0000 Date: Thu, 27 Jul 2023 19:54:34 +0100 From: Matthew Wilcox To: syzbot Cc: akpm@linux-foundation.org, liam.howlett@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [mm?] WARNING: suspicious RCU usage in mas_walk (2) Message-ID: References: <0000000000004ccc7906017c79e0@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0000000000004ccc7906017c79e0@google.com> X-Rspam-User: X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: 6E9F4100020 X-Stat-Signature: dajrbxgs9srcqrop7e6f8zhec3znnpah X-HE-Tag: 1690484078-458870 X-HE-Meta: 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 XnZHzkQx +2WCpoZRl6X85BdzvI5xfoG+uPihboNWgvwUd4jxwYhk6c/hX+oZMxBYEw9VjsQAhOAFZC+Hbgii0eFsJa66uj5wU7GoU4D28D0lmfsEp5XabK49mx0hMSR8G39sJVK1lAiuOrZNou+P0ANWtVDDIOp36xvaKdMCw+xRQAh7N9Hrt4EpkY/5LVz4VjSBCEaqpzbGuzplcoxcMyQu9HcVomH5Scupu871leANA98nnfBQu2kZv/bRPYs39Vz1AM1WwC39vhGJDZyQGHMipbxEE0lVZB+iKgezXnHqPLcnzKxkVqrL1p6IiqEl/s9azgDFsREDbRb68JWOGxfKoFZesqJGDaSBW6tcQd+T9tqFgfXS8DidsU7+ZfF/8EoG+RuETJ0K7Y3h8N9TLkrjrVIQz3R5KkjpUmJokuALIELhDBnM3DFPnBUAeQGUDREq6V7FOSA+hmFa5KaQuPfSFA5qMH6i8Qg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jul 27, 2023 at 11:53:02AM -0700, syzbot wrote: > > On Tue, Jul 25, 2023 at 11:57:22PM -0700, syzbot wrote: > >> syzbot has bisected this issue to: > >> > >> commit a52f58b34afe095ebc5823684eb264404dad6f7b > >> Author: Matthew Wilcox (Oracle) > >> Date: Mon Jul 24 18:54:10 2023 +0000 > >> > >> mm: handle faults that merely update the accessed bit under the VMA lock > >> > >> bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1783585ea80000 > >> start commit: [unknown] > >> git tree: linux-next > > > > #syz test linux-next a52f58b34afe095ebc5823684eb264404dad6f7b > > "linux-next" does not look like a valid git repo address. Well, now, that's your fault, isn't it? You're abbreviating the git tree in the report, but then refusing to accept the abbreviation in the response.