From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-oi1-f206.google.com (mail-oi1-f206.google.com [209.85.167.206]) (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 512374756A3 for ; Tue, 4 Aug 2026 14:05:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.167.206 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785852338; cv=none; b=JDmrRgkda2H5Z25urBtDU1BQfQAth+XVO9KQ2jENsBo/wO7RXvVUFkBdF4l0vfiPoQWu6jWKn8S29YHgbaCqzL7Dc2u6FBLmFu4ACEATmnQNhFwxux644VGTkdvOdVJS+S+BW20TonVK+4mWfGefdPSTOKnFPF+T0FlPafzlM7c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785852338; c=relaxed/simple; bh=WSCGeww0Z9mhTgCPwz/5yeDDtuc8CMarLKj9MUGQq6k=; h=MIME-Version:Date:In-Reply-To:Message-ID:Subject:From:To: Content-Type; b=asf3lE1UrBKKP1HbjX2wUgdLNUMbhhPZ2XA4axESJfZurasCUPeAWif9py/l+BLQ4r0GUrz2PWyAwnxNiWc4pO2TaDBRbgDwykJ3sRhT/lqPY60RGcHjQtbH5CXFgBNgYl4TgrjqDCDUdyzQlJ60hdS2+GR7aNrXw/cvxz7Eipw= 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=209.85.167.206 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-oi1-f206.google.com with SMTP id 5614622812f47-4ab260600easo1498624b6e.1 for ; Tue, 04 Aug 2026 07:05:37 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20251104; t=1785852336; x=1786457136; h=content-type:to:from:subject:message-id:in-reply-to:date :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to:content-type; bh=5+IMiqt7NNQBBUcZ5PLqgEP++0/ZmGbns9xvHW7NRr4=; b=Pd9nzo1IWidjVar2dwopRrIShjWLK3Jc0a6J7kKw8ij+yPgf6h38FSbJzK3fdemzLO Dz9Y7CKzszB/hsseHvu8yv6dNhH6NeL2TDX4bKmgF7ONROQm526pvJShAd1Rgj1whzbJ yi0xVQ3JtS3nyUOAS2goVXYvY/fHvm45o16MnytzvbGMal/mk4BufCcVjWQ0fzO7sQJp 6ALKMMubj+/nUztlAPeYKi1lXpdy1mE/minzehUDBuQfuR9y8vGzd140ylGZFPNIsBiH R/B8Go7XlP33CijEnsixaIRtcBar1iQggfqIeCJdTc8+fznUKPC8Fn20ZmtRKtayPqmr uGFw== X-Forwarded-Encrypted: i=1; AHgh+Ro0RRkhw9myO5f5oigvB/KkQ4ApG6NiK+wP2FfkSOh2iSroBYRzwfiOu3BZS0L+YYTX19y6ZjTWnJvnX60=@vger.kernel.org X-Gm-Message-State: AOJu0Yyr9myvtIZr3E9PNojH5GB5UUsnE8lZKNtA3RdskjXPhuS+wMtE 6dY22iaBiMN0zUaJ2nePmualuv8laezTkQeGj4srjrXG59LUySJcAGfaM5kC2dy+ZEt4MuIlNhD sfxHZdBuEsJJVMZvGEA7+aHAUhU3LlewP9WBAiziIM4fOX80lHY4OVGjN+CM= Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a05:6808:3510:b0:4a4:989:bb1f with SMTP id 5614622812f47-4af98935a91mr4488309b6e.9.1785852336225; Tue, 04 Aug 2026 07:05:36 -0700 (PDT) Date: Tue, 04 Aug 2026 07:05:36 -0700 In-Reply-To: <000000000000ac2392061f7a501b@google.com> X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <6a71f1b0.40259c87.584f4.04b8.GAE@google.com> Subject: Re: [syzbot] [mm?] kernel panic: System is deadlocked on memory (2) From: syzbot To: akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, mhocko@suse.com, rientjes@google.com, shakeel.butt@linux.dev, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" syzbot has found a reproducer for the following issue on: HEAD commit: 848acc8ffe1b Merge tag 'fsverity-for-linus' of git://git.k.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1559b649580000 kernel config: https://syzkaller.appspot.com/x/.config?x=145fa60d73086782 dashboard link: https://syzkaller.appspot.com/bug?extid=c61d6962d0b7e698439e 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=1531be32580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15938bb9580000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-848acc8f.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/6fb497cc0c8d/vmlinux-848acc8f.xz kernel image: https://storage.googleapis.com/syzbot-assets/663ccee34982/bzImage-848acc8f.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c61d6962d0b7e698439e@syzkaller.appspotmail.com kmalloc-96 1483KB 1500KB kmem_cache_node 219KB 220KB kmem_cache 181KB 226KB Out of memory and no killable processes... Kernel panic - not syncing: System is deadlocked on memory CPU: 0 UID: 0 PID: 5149 Comm: udevd 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 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x552/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1166 __alloc_pages_may_oom mm/page_alloc.c:4116 [inline] __alloc_pages_slowpath mm/page_alloc.c:4967 [inline] __alloc_frozen_pages_noprof+0x24c2/0x2dc0 mm/page_alloc.c:5317 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490 alloc_pages_noprof mm/mempolicy.c:2581 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2591 filemap_alloc_folio_noprof.part.0+0x377/0x450 mm/filemap.c:1013 filemap_alloc_folio_noprof mm/filemap.c:2027 [inline] __filemap_get_folio_mpol+0x653/0x1320 mm/filemap.c:2012 __filemap_get_folio include/linux/pagemap.h:761 [inline] filemap_fault+0x879/0x3130 mm/filemap.c:3592 __do_fault+0x10b/0x440 mm/memory.c:5425 do_read_fault mm/memory.c:5860 [inline] do_fault+0xa99/0x1750 mm/memory.c:5994 do_pte_missing mm/memory.c:4566 [inline] handle_pte_fault mm/memory.c:6379 [inline] __handle_mm_fault+0x187d/0x2a00 mm/memory.c:6517 handle_mm_fault+0x37b/0xa30 mm/memory.c:6686 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1343 handle_page_fault arch/x86/mm/fault.c:1483 [inline] exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595 RIP: 0033:0x7f72d08a7407 Code: Unable to access opcode bytes at 0x7f72d08a73dd. RSP: 002b:00007ffff9fa8a10 EFLAGS: 00010202 RAX: 0000000000000000 RBX: 00007f72d1003880 RCX: 00007f72d08a7407 RDX: 0000000000000008 RSI: 00007ffff9fa8b70 RDI: 000000000000000b RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000bb8 R11: 0000000000000202 R12: 0000000000000000 R13: 0000558259d38100 R14: 0000000000000001 R15: 00007ffff9fa8c60 Kernel Offset: disabled Rebooting in 86400 seconds.. --- 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.