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h=Date:From:To:Cc:Subject:References:In-Reply-To; b=M2GZ3PvdvIIc3QHnujmylrLk0OTC1XZmWij350Oprx7fKaDYxIML4dZLSBUQmGXEi l1zk0PNDiYHX53ePOujhKOKM6ffB8QEQ8grv+Lh5FnKCZDboK8BKZQDmQnFLDQkXeM RVpQXS1AQ+3izISLfVaZ7nhOaJVFlKqSc8qi9D4Z6vfzQdoMUnYLqmrhwQkyRfBUop jxZSASGal/6kgi0HY15mZisXXRp2g6FiruA3KjIOac/TwCF39Bu2BfPiwSA6tkZ9aI SOU9epFApm7zgV/JtqvniUyoRmE0Db2JrBLsjAU518E9R9bZS+LvLrfH47moyQ0vVt RM8fTACARSHkw== Date: Tue, 8 Sep 2026 11:24:37 +0100 From: "Lorenzo Stoakes (ARM)" To: "Vlastimil Babka (SUSE)" Cc: syzbot , akpm@linux-foundation.org, jannh@google.com, liam@infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, pfalcato@suse.de, syzkaller-bugs@googlegroups.com Subject: Re: [syzbot] [mm?] WARNING in vma_add_pgoff Message-ID: References: <20260907192517.564ea15aa8c9d47669b3a81f@linux-foundation.org> <6a9f8bc6.f614420e.2bf292.0005.GAE@google.com> <90cd8ace-b135-45d6-815b-bf7329cbfa4d@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <90cd8ace-b135-45d6-815b-bf7329cbfa4d@kernel.org> X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 9171710000C X-Stat-Signature: b344stuijtnpa69aj3nn6wmny1unfrt5 X-HE-Tag: 1788863083-379255 X-HE-Meta: U2FsdGVkX1/ubQMWXhg6bM98lo5Y2go+JKfHaGhFK1jDXyJOKzPCZ5pL3AjpOwa3Te2h+st45XDU57eSupcJkHlWx6SaaW6LaLfeUai4gr2eRpESGj6JPBYu4wTFPNCGnMiitHV+YfRFr7C9QcxrRrLBvkIVbCZ9+Ih84v0aP+bRrd/gYbsq8q54gb1Ap0F9JTm9QVeCdl/Vx5DvadS6W6ZDm3OXCGxGc0+jNG9lo/jQfEQvriZMZPYFef2xxfzzX0MwMLqNYX5Yg7HZ0bYBJVKHKYfHHLpx+i1vqsbRz4mOCTRIpWKQufRqtCPsYxqGD5Lwg4s/BktEL0W8/AyTtK6xnHauYQsghBle7RDJmG0EehiC0UmeRq2NXsibz9ju5cjWRJuk2RuTwhHBiUAEh9lXcjVBnN9BVRqLhjQHoWgGQI2YCHAxcfslPNDbMJtmnC2GbuGhDIE6QcfdwK/qU2AuCEhl/5xnqUse/zISmL7RKbvjqfhNh5WuGNQvza3pIOptoyYjVK4DzKtIv3aqKMI8LSLNKXRlaaalDqE8DLgbHxPPneUcCSPSHSakJtRD8+7/J+yz0TWQPgEedTB3sGdXmESLVqu/idv9bAFz+xECq7XzYe1Jx2cc1wQnvomGPKSP8VujB2q5x60ICKxW2/h/bPmec5BxevyAe+iuA42WQn/5Me+F9uDEPGfAa2O9kTpiZSvyQbkBowc7yXOUfPUBsclsjJOK5C/UMGoM6ex9lCXzw1Nfyg/zJDP5bmhYqxonb6IwoNGNTIYzqK4rYKVRr0jkeon/nZVyNvwe6UckGpPdYCzqg24tKEFRR58mkn0lIkc3Onn8ux5u8t0f1ZgNBe9S2n/WAhx2iD9ILe1fq7kHri+sny8NILrH45tEQ3SUvgAOVZFBy1jDXT/y6zcogHbclyjfUjnxZ6duMsD+qtFdtSvnbyKT6gzyL2k1RA1PAWIcGKTSfgykKQi aMTCM+c5 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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 Tue, Sep 08, 2026 at 11:32:18AM +0200, Vlastimil Babka (SUSE) wrote: > On 9/8/26 11:25, Lorenzo Stoakes (ARM) wrote: > > On Mon, Sep 07, 2026 at 09:15:02PM -0700, syzbot wrote: > >> Hello, > >> > >> syzbot has tested the proposed patch and the reproducer did not trigger any issue: > >> > >> Reported-by: syzbot+c6879dc677a017f0a21b@syzkaller.appspotmail.com > >> Tested-by: syzbot+c6879dc677a017f0a21b@syzkaller.appspotmail.com > > > > Yup there we are :) > > > > Why is this constantly duplicating I wonder... > > Going back to the first mail: > > syzbot found the following issue on: > > HEAD commit: 5445d6419962 arm64: Don't read GMID_EL1 when MTE is disabled > git tree: > git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > > We can see it's based from 7.3-rc1: > > https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git/log/?h=for-kernelci > > And since the problem was introduced there, all kinds of development trees > for 7.4 (or even pending hotfixes for 7.3) based on 7.3-rc1 will now have it. Yeah but I marked this #syz dupe? I guess that's cleared maybe for a new job? > > I guess syzbot has to learn to recognize it's a known problem and ignore it, > or have some repo of known important fixes merged after rc1 it applies on > top of such development trees, as they generaly won't be rebased to later rcs. Yeah, be nice if 'hey check this upstream commit does it fix it?' *syzbot confirms yes* could -> mark reports redundant. But maybe harder to actually do than that? > > > > >> > >> Tested on: > >> > >> commit: 35b0fb39 mm/mremap: reset unfaulted VMA page offset fo.. > >> git tree: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > >> console output: https://syzkaller.appspot.com/x/log.txt?x=15e13af9580000 > >> kernel config: https://syzkaller.appspot.com/x/.config?x=56ed23170c168d4c > >> dashboard link: https://syzkaller.appspot.com/bug?extid=c6879dc677a017f0a21b > >> compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8 > >> userspace arch: arm64 > >> > >> Note: no patches were applied. > >> Note: testing is done by a robot and is best-effort only. > > > > -- > > Cheers, Lorenzo > -- Cheers, Lorenzo