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Received: from willy by casper.infradead.org with local (Exim 4.98 #2 (Red Hat Linux)) id 1svGpG-0000000HPFb-2qfD; Mon, 30 Sep 2024 13:52:34 +0000 Date: Mon, 30 Sep 2024 14:52:34 +0100 From: Matthew Wilcox To: syzbot Cc: Liam.Howlett@oracle.com, akpm@linux-foundation.org, david@redhat.com, hdanton@sina.com, hughd@google.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, syzkaller-bugs@googlegroups.com, vbabka@suse.cz, vivek.kasireddy@intel.com Subject: Re: [syzbot] [mm?] BUG: Bad page map (8) Message-ID: References: <000000000000341f5f061d8d6bcb@google.com> <66f9ea7a.050a0220.aab67.0023.GAE@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <66f9ea7a.050a0220.aab67.0023.GAE@google.com> X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: 8BC552000E X-Stat-Signature: s9j1q6ndbikhpdhkinor1nktmm1u1bj4 X-Rspam-User: X-HE-Tag: 1727704368-163910 X-HE-Meta: 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 Zc6hmNDr zP5ee/zFzuXmP42Y7Xa+R10TwqPwnAyal1f86meVmbS3FVqt5BBHmEzN9yHAxzmYC7niIPoQGjErP7E6AR72c2A1bAQe7iggFpZ07U/ukzx6O46p4eNAgNtT1ob89kveoAN27N8cblaO7NSCLplOyQKWLdVfO/IdQM+TNkzm22qynu8u7Z81liDknLY8wyLcBBZPcErQcxWLlwcfb9I5M37+TTOUpCD27dMdY54bdWY7xT368N8ibw0KsZt7QAJqXbxclqHslxJMFoS9p9XSw+IgeWE1BERxpAzYdnTNsmqJ7VXxudBSwhN7jmho2DjUnmPYuJ33JM6dWJDqqMI/B/lqS7q3CY+NLkhRNaTU8Vmsi3Q8KuVvHVTP6lhC+kVIAjRRosg98ISLE8Z+lo0g/2CisSpUvoY2Cu2u82fVivnZatEdyY02hRcRR2e9VLEYWOf3zSoIYf23pV1yjGf/78sTWkg== 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 Sun, Sep 29, 2024 at 05:02:02PM -0700, syzbot wrote: > syzbot has bisected this issue to: > > commit f8d112a4e657c65c888e6b8a8435ef61a66e4ab8 > Author: Liam R. Howlett > Date: Fri Aug 30 04:00:54 2024 +0000 > > mm/mmap: avoid zeroing vma tree in mmap_region() This is almost certainly a bogus bisection. See https://lore.kernel.org/all/00000000000020f6f8061da86023@google.com/