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Thu, 27 Aug 2026 17:50:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0AA401F000E9; Thu, 27 Aug 2026 17:50:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1787853004; bh=8auLYL/honounuAgEiIEfBufuI789JRuMjZqxnhKg2w=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=GWi1wjzLnDJHypMmFBXTzvinWIOG/rwytTmd21trvbNDlgq6ZMPoslM9XYrKm4jyM o523GOy0ABpOUEHPMC4UnfkRQcDSLdZbUkXM+amrBnJjFATxum44qwtmbQxuu9uM1T FbllLtgmyfpFX14SmNU3IG8onJB7R/3qUVgCjvy3RmK+d3EF6nrAq2D97EWejFP4uy sfUS3v1/437XMe/2I87aIU7yooBfrF16DlTNJRO1abyX7iXyKsZfE2Co58mlwxTJgS LskJB1KlIqGBekVBhPfIa8mmWejOqAo+TgOGAUoAgTUb/HAR5gm+qkvBlzhi7C/n4A 2Z3MPvZipQ8dQ== Date: Thu, 27 Aug 2026 18:49:59 +0100 From: "Lorenzo Stoakes (ARM)" To: syzbot Cc: 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, vbabka@kernel.org Subject: Re: [syzbot] [mm?] WARNING in 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 OWUeWGrI v3E2IwOyC2H2OFfshbZyt3dgFErtGM2x0KTRIE3zUv/VeswaAk4ayBs3zissM3Wh8Rf8AnwkTYTjz+4JXjXv1YrBoqRQ35YZoarMjNiFVM8mynwSFb/aC9EsjSIVEbDsBNoUGR4p2ovoDHr8AiDBhpS0ArFYEnSc Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: #syz dup: [syzbot] [mm?] WARNING in vma_set_pgoff On Thu, Aug 27, 2026 at 01:33:42AM -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 > > ------------[ cut here ]------------ > pgoff != vma->vm_start >> 12 > WARNING: mm/vma.h:276 at assert_sane_pgoff mm/vma.h:276 [inline], CPU#2: syz.0.17/5920 > WARNING: mm/vma.h:276 at vma_set_pgoff mm/vma.h:282 [inline], CPU#2: syz.0.17/5920 > WARNING: mm/vma.h:276 at vma_add_pgoff mm/vma.h:289 [inline], CPU#2: syz.0.17/5920 > WARNING: mm/vma.h:276 at __split_vma+0x1228/0x1800 mm/vma.c:578, CPU#2: syz.0.17/5920 > Modules linked in: > CPU: 2 UID: 0 PID: 5920 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT(full) > Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 > RIP: 0010:assert_sane_pgoff mm/vma.h:276 [inline] > RIP: 0010:vma_set_pgoff mm/vma.h:282 [inline] > RIP: 0010:vma_add_pgoff mm/vma.h:289 [inline] > RIP: 0010:__split_vma+0x1228/0x1800 mm/vma.c:578 > Code: 3c 02 00 0f 85 d3 05 00 00 4c 8b 2b 48 89 ef 49 c1 ed 0c 4c 89 ee e8 a7 3d 9e ff 4c 39 ed 0f 84 bf fd ff ff e8 b9 43 9e ff 90 <0f> 0b 90 e9 b1 fd ff ff e8 ab 43 9e ff 48 8b 54 24 38 48 b8 00 00 > RSP: 0018:ffffc9000344f228 EFLAGS: 00010293 > RAX: 0000000000000000 RBX: ffff88803e4b23c0 RCX: 0000000000000000 > RDX: ffff888030d0a580 RSI: ffffffff826cbe17 RDI: ffff888030d0a580 > RBP: 0000000200000003 R08: 0000000000000006 R09: 0000000200000003 > R10: 0000000200000ffd R11: 0000000000000000 R12: ffff88803e4b2410 > R13: 0000000200000ffd R14: ffffc9000344f5c8 R15: 0000000000000000 > FS: 000055555d60b500(0000) GS:ffff8880d5da2000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 00007ff66f270000 CR3: 000000001345e000 CR4: 0000000000352ef0 > Call Trace: > > vms_gather_munmap_vmas+0x1d2/0x1720 mm/vma.c:1472 > __mmap_setup mm/vma.c:2496 [inline] > __mmap_region+0x4a7/0x30b0 mm/vma.c:2818 > mmap_region+0x5a8/0x6d0 mm/vma.c:2921 > do_mmap+0x12c7/0x1c30 mm/mmap.c:573 > vm_mmap_pgoff+0x28d/0x470 mm/util.c:581 > ksys_mmap_pgoff+0x3cb/0x610 mm/mmap.c:619 > __do_sys_mmap arch/x86/kernel/sys_x86_64.c:89 [inline] > __se_sys_mmap arch/x86/kernel/sys_x86_64.c:82 [inline] > __x64_sys_mmap+0x125/0x190 arch/x86/kernel/sys_x86_64.c:82 > do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] > do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 > entry_SYSCALL_64_after_hwframe+0x77/0x7f > RIP: 0033:0x7ff66f39e0d9 > Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 > RSP: 002b:00007ffec1164ee8 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 > RAX: ffffffffffffffda RBX: 00007ff66f625fa0 RCX: 00007ff66f39e0d9 > RDX: 0000000000000001 RSI: 0000000000003000 RDI: 0000200000ffd000 > RBP: 00007ff66f435024 R08: 0000000000000004 R09: 0000010000000000 > R10: 0000000000000011 R11: 0000000000000246 R12: 0000000000000000 > R13: 00007ff66f625fac R14: 00007ff66f625fa0 R15: 00007ff66f625fa0 > > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@googlegroups.com. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > > If the report is already addressed, let syzbot know by replying with: > #syz fix: exact-commit-title > > If you want syzbot to run the reproducer, reply with: > #syz test: git://repo/address.git branch-or-commit-hash > If you attach or paste a git patch, syzbot will apply it before testing. > > If you want to overwrite report's subsystems, reply with: > #syz set subsystems: new-subsystem > (See the list of subsystem names on the web dashboard) > > If the report is a duplicate of another one, reply with: > #syz dup: exact-subject-of-another-report > > If you want to undo deduplication, reply with: > #syz undup -- Cheers, Lorenzo