From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-il1-f206.google.com (mail-il1-f206.google.com [209.85.166.206]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4109C17BA3 for ; Sat, 4 Jan 2025 12:25:26 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.166.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735993528; cv=none; b=Xto1ewUAlQleMd4Y/3/HKAIr+KanGGq3FZiiDYyB4D6p+M9vDXEq9xWJZ9HdD2QfjfMCdwOqbrxnyVjY3fC1AtL/C2y7WagTChJNx1XmX539KhTeH0fVUlwbOTH64f9W6zPh8Fbc4ZR/q2pUtGPrFrC8RRvIpmd2JqRDNJa3opo= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1735993528; c=relaxed/simple; bh=NTAWEWY36dJpwzegY+oVyQmwDw2Fy46dd3TVQMPLf/k=; h=MIME-Version:Date:Message-ID:Subject:From:To:Content-Type; b=tQa9AlWk0n9Snv2uCMJDiknil30X0o92U3sOpZS0V2jBIchrzMeAbCalvBq8wq70Kno7Qa7seGvyKXZx2SyE5Q0Wz0By9zSvrOyoWS0VW1fKU8fr32RmA/k5p+RToaEs7Biq73JNBTuFKd7UFV80CzW+c6IrnYPwGRHKBwFl+Yk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com; arc=none smtp.client-ip=209.85.166.206 Authentication-Results: smtp.subspace.kernel.org; dmarc=fail (p=none dis=none) header.from=syzkaller.appspotmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=M3KW2WVRGUFZ5GODRSRYTGD7.apphosting.bounces.google.com Received: by mail-il1-f206.google.com with SMTP id e9e14a558f8ab-3a817be161bso125906725ab.1 for ; Sat, 04 Jan 2025 04:25:25 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1735993525; x=1736598325; h=to:from:subject:message-id:date:mime-version:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=nIUWY2molVtORKN/SRyQ31ZUX0txJl7I6wbKt3j8Buc=; b=a0afejXomI/GFtaG6290O4BElyVk44hiUZTwkZ8PAKXatVTt8OP/pbqMW6rFLAQxdH JoQap68OmrIa18pzMjo4C3T1gBdPVw3NJCLTiwQvppGgYvyV4SN+30Ks/w6FiMF2wc07 VRCGG8smOyzht6Q2im4vzUS0jsfHr0hY8862QBpE7w/tD1sxwAThtZWrSSOCq/xqreKm 0XhN/OFS0+mjRVeTbnZsfDhzvdUvfF0N7qOohpqoR6rkdAjVR2/zfAfr3UT85dBAugMC hLW1a3931ZGkT4UtmfbkGKmp/3SZuHBGL3ds734dRsA1eudq1nnvK8yx/OrRlZLbQTvx pwWg== X-Forwarded-Encrypted: i=1; AJvYcCWZGiWULSmrzWAkezQYUByGPEc2w00z5U5trWYdATKEgjG1baE7xc1VMeUpu1EPZfBhyYun/RuzQQ/l5mI=@vger.kernel.org X-Gm-Message-State: AOJu0YyfYKfbcIV68hsLNJDLl3YIZfo71Tc1m4gG/M5Wl4Wc5C22kc8A EgoKXS1ZlyZZZHS2yPf8VQGF7WK9MPEuI33KdQUCblXDmfHK3YEg2qaK5dn8v8hYezjxWd8qlX8 cBhpRWZhwK+zOsi8lrCu6Vx1E5LZin8fuNGwzGAbNBR1hWMXWtEzpjbY= X-Google-Smtp-Source: AGHT+IEepKlK+GOL9KHAL51O+SZY6agTopjoYhNbtdZhh1hwszVhLaqRCMrScliigH8ykFqMTWdzPeuWXtD1/0LdXqtLeLEVkTv/ Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6e02:349c:b0:3a7:d02b:f653 with SMTP id e9e14a558f8ab-3c2f9815c0emr479713585ab.0.1735993525429; Sat, 04 Jan 2025 04:25:25 -0800 (PST) Date: Sat, 04 Jan 2025 04:25:25 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <677928b5.050a0220.3b53b0.004d.GAE@google.com> Subject: [syzbot] [mm?] kernel BUG in alloc_hugetlb_folio_reserve From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, muchun.song@linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: 63676eefb7a0 Merge tag 'sched_ext-for-6.13-rc5-fixes' of g.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=15fb66f8580000 kernel config: https://syzkaller.appspot.com/x/.config?x=1c541fa8af5c9cc7 dashboard link: https://syzkaller.appspot.com/bug?extid=a504cb5bae4fe117ba94 compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-63676eef.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/599e1a07ba5c/vmlinux-63676eef.xz kernel image: https://storage.googleapis.com/syzbot-assets/b52f3534bdbe/bzImage-63676eef.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+a504cb5bae4fe117ba94@syzkaller.appspotmail.com ------------[ cut here ]------------ kernel BUG at mm/hugetlb.c:2403! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5315 Comm: syz.0.0 Not tainted 6.13.0-rc5-syzkaller-00161-g63676eefb7a0 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:alloc_hugetlb_folio_reserve+0xbc/0xc0 mm/hugetlb.c:2403 Code: 1f eb 05 e8 56 18 a0 ff 48 c7 c7 40 56 61 8e e8 ba 21 cc 09 4c 89 f0 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 35 18 a0 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000d3d77f8 EFLAGS: 00010087 RAX: ffffffff81ff6beb RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e51a000 RSI: 00000000000003ec RDI: 00000000000003ed RBP: 1ffffffff34810d9 R08: ffffffff81ff6ba3 R09: 1ffffd4000093005 R10: dffffc0000000000 R11: fffff94000093006 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffea0000498000 R15: ffffffff9a4086c8 FS: 00007f77ac12e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77ab54b170 CR3: 0000000040b70000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memfd_alloc_folio+0x1bd/0x370 mm/memfd.c:88 memfd_pin_folios+0xf10/0x1570 mm/gup.c:3750 udmabuf_pin_folios drivers/dma-buf/udmabuf.c:346 [inline] udmabuf_create+0x70e/0x10c0 drivers/dma-buf/udmabuf.c:443 udmabuf_ioctl_create drivers/dma-buf/udmabuf.c:495 [inline] udmabuf_ioctl+0x301/0x4e0 drivers/dma-buf/udmabuf.c:526 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf5/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f77ab385d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f77ac12e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f77ab575fa0 RCX: 00007f77ab385d29 RDX: 0000000020000040 RSI: 0000000040187542 RDI: 0000000000000006 RBP: 00007f77ab401b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f77ab575fa0 R15: 00007fff748b7238 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:alloc_hugetlb_folio_reserve+0xbc/0xc0 mm/hugetlb.c:2403 Code: 1f eb 05 e8 56 18 a0 ff 48 c7 c7 40 56 61 8e e8 ba 21 cc 09 4c 89 f0 5b 41 5c 41 5e 41 5f 5d c3 cc cc cc cc e8 35 18 a0 ff 90 <0f> 0b 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f RSP: 0018:ffffc9000d3d77f8 EFLAGS: 00010087 RAX: ffffffff81ff6beb RBX: 0000000000000000 RCX: 0000000000100000 RDX: ffffc9000e51a000 RSI: 00000000000003ec RDI: 00000000000003ed RBP: 1ffffffff34810d9 R08: ffffffff81ff6ba3 R09: 1ffffd4000093005 R10: dffffc0000000000 R11: fffff94000093006 R12: dffffc0000000000 R13: dffffc0000000000 R14: ffffea0000498000 R15: ffffffff9a4086c8 FS: 00007f77ac12e6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f77ab54b170 CR3: 0000000040b70000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 --- 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 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