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h=Date:From:To:Cc:Subject:In-Reply-To:References; b=lIAmOY8W7LKUCKU2gMhg6cObfeD7bpLl8Jz8Ugv3lydn9tmYVzG6k2DPNOtqMwgwV jnlBbEcCQDWiyrLzXBWOanA8LOejEtz+RQyATcoJPA0W1k1DbHppN5Xrl0fV87cWiu 8B0cvqZuWNDwdluVLu3TST4jSTNX0UTw+IZQxk2c= Date: Thu, 27 Aug 2026 09:33:22 -0700 From: Andrew Morton To: syzbot Cc: jannh@google.com, liam@infradead.org, 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?] WARNING in __split_vma Message-Id: <20260827093322.f99541b28aad2a3c069ed155@linux-foundation.org> In-Reply-To: <6a8ff666.27659fcc.2ceef7.000f.GAE@google.com> References: <6a8ff666.27659fcc.2ceef7.000f.GAE@google.com> 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-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: BA1A640011 X-Stat-Signature: bwaizs8pxfbg4y4grtfnx9qg4nc17fsz X-Rspam-User: X-HE-Tag: 1787848403-840696 X-HE-Meta: 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 m9doUHwW 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 xqpiYNJv 8HLzATyGiTK3G6e6TtGHQg== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, 27 Aug 2026 01:33:42 -0700 syzbot wrote: > Hello, > > syzbot found the following issue on: > > HEAD commit: 818bebeb63dd drm/xe: Don't hand out the flat CCS storage a.. > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1645f979580000 > kernel config: https://syzkaller.appspot.com/x/.config?x=ccca94d2c01b9e78 > dashboard link: https://syzkaller.appspot.com/bug?extid=5c417b73ac02e0e352c4 > compiler: gcc (Debian 14.2.0-19) 14.2.0, GNU ld (GNU Binutils for Debian) 2.44 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=104a0d49580000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13f35979580000 > > Downloadable assets: > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-818bebeb.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/6e4100526b12/vmlinux-818bebeb.xz > kernel image: https://storage.googleapis.com/syzbot-assets/723c4783ee96/bzImage-818bebeb.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+5c417b73ac02e0e352c4@syzkaller.appspotmail.com Thanks. Hopefully fixed by the pending "mm/mremap: reset unfaulted VMA page offset for MREMAP_DONTUNMAP". https://lore.kernel.org/20260825-fix-mremap-dontunmap-pgoff-v1-1-39a40b2c98b3@kernel.org