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b=V/rDDouBjdNcWrH6JRKCAugyirykGI0GU3NrrFCydFRtIPRfxbo/o6ccW2wnYBML9 F0NZond9aRczQtzs2iKYknjEaoOxEMeA4fMPl6CPl/5YsIbJPz0kNuknftuDQObJm0 /s9i3PW04taTy6e3rjXlCGE7yCduOvFlZsrrfSgM= Date: Thu, 26 Sep 2024 13:47:12 -0700 From: Andrew Morton To: syzbot Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, pasha.tatashin@soleen.com, syzkaller-bugs@googlegroups.com, Peter Xu Subject: Re: [syzbot] [mm?] kernel BUG in page_table_check_clear (2) Message-Id: <20240926134712.e99b7e7068ecc45f7cd00f16@linux-foundation.org> In-Reply-To: <66f4f173.050a0220.211276.003c.GAE@google.com> References: <66f4f173.050a0220.211276.003c.GAE@google.com> X-Mailer: Sylpheed 3.7.0 (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-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: DFD081C0011 X-Stat-Signature: okc67bj1118we5q4icijfoe9hmqwyj6d X-HE-Tag: 1727383634-720740 X-HE-Meta: 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 sxtUmqOT 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 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: List-Subscribe: List-Unsubscribe: On Wed, 25 Sep 2024 22:30:27 -0700 syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 1ec6d097897a Merge tag 's390-6.12-1' of git://git.kernel.o.. Thanks. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=173cdca9980000 > kernel config: https://syzkaller.appspot.com/x/.config?x=6265dd30e362bb47 > dashboard link: https://syzkaller.appspot.com/bug?extid=645f216781b26a92a732 > compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12fcb080580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17b76c27980000 Seems to be memfd-related. Will the bot be performing a bisection search? > > ... >