Received: by 2002:ad5:474a:0:0:0:0:0 with SMTP id i10csp324382imu; Wed, 2 Jan 2019 07:23:45 -0800 (PST) X-Google-Smtp-Source: AFSGD/WlnoJoA8TWU+kIcKWCfa4hYR+ru+aE+15n1CbJdwDBBvzJ+J/gGF9GTfK9RaSUN2PE9Id6 X-Received: by 2002:aa7:8354:: with SMTP id z20mr44270018pfm.81.1546442624997; Wed, 02 Jan 2019 07:23:44 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; t=1546442624; cv=none; d=google.com; s=arc-20160816; b=o680jCOZNyOTDvnygYcvotDB5Bqcfyev731LXwXVmHsGvlHqFLqO5l8ctkrRU8vKbg Ri5M6WpvNZCU41QiWIF5gFNJRzwnWWzUlvpe80Gd7dxS0jhVyM1MDwM4Vk7thaFc31Ry 2ws/4lvPri4fIkgI27oi5aQIl9HDpRW8E3Y2lZWw+gH//ALe95/yR3VJcxftdUmUwjjI KKElAmMTT+UQ9oytxi9cQGquRIA9N5D5jYrKDpjXyIo+2+TjOQPYW1MglQyzKmAJhRix ZM9gY0qOelt3uYLzCvj4mXtDwJXeMyp3LjSCl1ZgNtSNXUSZ8d/WNfGBvHIiuBTAQv1G OhjA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:openpgp:from:references:to:subject; bh=hLDjy1MVoPps3wYCjzyrMmnELMO1EQ9fHO0LFxhxfvM=; b=tXc59cpz8jYQQcYzGHyHf0gdpViKeut3Qu2SkUhGcH0h7Srj5F3g+voRHzFWVhle56 u0m69ENw44evNbhafWWMIUhjaK+RX9V9uWppApRsXcx09ao3AuJrFuftUqRuuo1kAn/V O9tcn9tPyyCKO2tl8BROpQf8Ps9L3+XmQCIGHMm/t7TPi4stfxTPyhY0QzBoKzOZ8r/X LE3fAr+N7Dxr6IrgjxXzxLp+BOPhokUDn7pcTFcj0a/t9ws71dOGMS21CmkDJlu4+jIr hLas7Om46LjfKV8HNe0NNtn5I0QSneQeRIHRi0ESy+k/TQfF3O8hLlYISMeHEG4ShEoK RSug== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id m5si51679719pfm.149.2019.01.02.07.23.29; Wed, 02 Jan 2019 07:23:44 -0800 (PST) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729122AbfABMvK (ORCPT + 99 others); Wed, 2 Jan 2019 07:51:10 -0500 Received: from mx2.suse.de ([195.135.220.15]:39932 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726772AbfABMvK (ORCPT ); Wed, 2 Jan 2019 07:51:10 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 705B8AF16; Wed, 2 Jan 2019 12:51:03 +0000 (UTC) Subject: Re: possible deadlock in __wake_up_common_lock To: syzbot , aarcange@redhat.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux@dominikbrodowski.net, mhocko@suse.com, rientjes@google.com, syzkaller-bugs@googlegroups.com, xieyisheng1@huawei.com, zhongjiang@huawei.com, Mel Gorman , Peter Zijlstra , Ingo Molnar References: <000000000000f67ca2057e75bec3@google.com> From: Vlastimil Babka Openpgp: preference=signencrypt Message-ID: <1194004c-f176-6253-a5fd-682472dccacc@suse.cz> Date: Wed, 2 Jan 2019 13:51:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.3.3 MIME-Version: 1.0 In-Reply-To: <000000000000f67ca2057e75bec3@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 1/2/19 9:51 AM, syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: f346b0becb1b Merge branch 'akpm' (patches from Andrew) > git tree: upstream > console output: https://syzkaller.appspot.com/x/log.txt?x=1510cefd400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=c255c77ba370fe7c > dashboard link: https://syzkaller.appspot.com/bug?extid=93d94a001cfbce9e60e1 > compiler: gcc (GCC) 8.0.1 20180413 (experimental) > userspace arch: i386 > > Unfortunately, I don't have any reproducer for this crash yet. > > IMPORTANT: if you fix the bug, please add the following tag to the commit: > Reported-by: syzbot+93d94a001cfbce9e60e1@syzkaller.appspotmail.com > > > ====================================================== > WARNING: possible circular locking dependency detected > 4.20.0+ #297 Not tainted > ------------------------------------------------------ > syz-executor0/8529 is trying to acquire lock: > 000000005e7fb829 (&pgdat->kswapd_wait){....}, at: > __wake_up_common_lock+0x19e/0x330 kernel/sched/wait.c:120 From the backtrace at the end of report I see it's coming from > wakeup_kswapd+0x5f0/0x930 mm/vmscan.c:3982 > steal_suitable_fallback+0x538/0x830 mm/page_alloc.c:2217 This wakeup_kswapd is new due to Mel's 1c30844d2dfe ("mm: reclaim small amounts of memory when an external fragmentation event occurs") so CC Mel. > but task is already holding lock: > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: spin_lock > include/linux/spinlock.h:329 [inline] > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue_bulk > mm/page_alloc.c:2548 [inline] > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: __rmqueue_pcplist > mm/page_alloc.c:3021 [inline] > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue_pcplist > mm/page_alloc.c:3050 [inline] > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue > mm/page_alloc.c:3072 [inline] > 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: > get_page_from_freelist+0x1bae/0x52a0 mm/page_alloc.c:3491 > > which lock already depends on the new lock. However, I don't understand why lockdep thinks it's a problem. IIRC it doesn't like that we are locking pgdat->kswapd_wait.lock while holding zone->lock. That means it has learned that the opposite order also exists, e.g. somebody would take zone->lock while manipulating the wait queue? I don't see where but I admit I'm not good at reading lockdep splats, so CCing Peterz and Ingo as well. Keeping rest of mail for reference. > the existing dependency chain (in reverse order) is: > > -> #4 (&(&zone->lock)->rlock){-.-.}: > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 > rmqueue mm/page_alloc.c:3082 [inline] > get_page_from_freelist+0x9eb/0x52a0 mm/page_alloc.c:3491 > __alloc_pages_nodemask+0x4f3/0xde0 mm/page_alloc.c:4529 > __alloc_pages include/linux/gfp.h:473 [inline] > alloc_page_interleave+0x25/0x1c0 mm/mempolicy.c:1988 > alloc_pages_current+0x1bf/0x210 mm/mempolicy.c:2104 > alloc_pages include/linux/gfp.h:509 [inline] > depot_save_stack+0x3f1/0x470 lib/stackdepot.c:260 > save_stack+0xa9/0xd0 mm/kasan/common.c:79 > set_track mm/kasan/common.c:85 [inline] > kasan_kmalloc+0xcb/0xd0 mm/kasan/common.c:482 > kasan_slab_alloc+0x12/0x20 mm/kasan/common.c:397 > kmem_cache_alloc+0x130/0x730 mm/slab.c:3541 > kmem_cache_zalloc include/linux/slab.h:731 [inline] > fill_pool lib/debugobjects.c:134 [inline] > __debug_object_init+0xbb8/0x1290 lib/debugobjects.c:379 > debug_object_init lib/debugobjects.c:431 [inline] > debug_object_activate+0x323/0x600 lib/debugobjects.c:512 > debug_timer_activate kernel/time/timer.c:708 [inline] > debug_activate kernel/time/timer.c:763 [inline] > __mod_timer kernel/time/timer.c:1040 [inline] > mod_timer kernel/time/timer.c:1101 [inline] > add_timer+0x50e/0x1490 kernel/time/timer.c:1137 > __queue_delayed_work+0x249/0x380 kernel/workqueue.c:1533 > queue_delayed_work_on+0x1a2/0x1f0 kernel/workqueue.c:1558 > queue_delayed_work include/linux/workqueue.h:527 [inline] > schedule_delayed_work include/linux/workqueue.h:628 [inline] > start_dirtytime_writeback+0x4e/0x53 fs/fs-writeback.c:2043 > do_one_initcall+0x145/0x957 init/main.c:889 > do_initcall_level init/main.c:957 [inline] > do_initcalls init/main.c:965 [inline] > do_basic_setup init/main.c:983 [inline] > kernel_init_freeable+0x4c1/0x5af init/main.c:1136 > kernel_init+0x11/0x1ae init/main.c:1056 > ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:352 > > -> #3 (&base->lock){-.-.}: > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 > lock_timer_base+0xbb/0x2b0 kernel/time/timer.c:937 > __mod_timer kernel/time/timer.c:1009 [inline] > mod_timer kernel/time/timer.c:1101 [inline] > add_timer+0x895/0x1490 kernel/time/timer.c:1137 > __queue_delayed_work+0x249/0x380 kernel/workqueue.c:1533 > queue_delayed_work_on+0x1a2/0x1f0 kernel/workqueue.c:1558 > queue_delayed_work include/linux/workqueue.h:527 [inline] > schedule_delayed_work include/linux/workqueue.h:628 [inline] > psi_group_change kernel/sched/psi.c:485 [inline] > psi_task_change+0x3f1/0x5f0 kernel/sched/psi.c:534 > psi_enqueue kernel/sched/stats.h:82 [inline] > enqueue_task kernel/sched/core.c:727 [inline] > activate_task+0x21a/0x430 kernel/sched/core.c:751 > wake_up_new_task+0x527/0xd20 kernel/sched/core.c:2423 > _do_fork+0x33b/0x11d0 kernel/fork.c:2247 > kernel_thread+0x34/0x40 kernel/fork.c:2281 > rest_init+0x28/0x372 init/main.c:409 > arch_call_rest_init+0xe/0x1b > start_kernel+0x873/0x8ae init/main.c:741 > x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 > x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 > secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 > > -> #2 (&rq->lock){-.-.}: > __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] > _raw_spin_lock+0x2d/0x40 kernel/locking/spinlock.c:144 > rq_lock kernel/sched/sched.h:1149 [inline] > task_fork_fair+0xb0/0x6d0 kernel/sched/fair.c:10083 > sched_fork+0x443/0xba0 kernel/sched/core.c:2359 > copy_process+0x25b9/0x8790 kernel/fork.c:1893 > _do_fork+0x1cb/0x11d0 kernel/fork.c:2222 > kernel_thread+0x34/0x40 kernel/fork.c:2281 > rest_init+0x28/0x372 init/main.c:409 > arch_call_rest_init+0xe/0x1b > start_kernel+0x873/0x8ae init/main.c:741 > x86_64_start_reservations+0x29/0x2b arch/x86/kernel/head64.c:470 > x86_64_start_kernel+0x76/0x79 arch/x86/kernel/head64.c:451 > secondary_startup_64+0xa4/0xb0 arch/x86/kernel/head_64.S:243 > > -> #1 (&p->pi_lock){-.-.}: > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 > try_to_wake_up+0xdc/0x1460 kernel/sched/core.c:1965 > default_wake_function+0x30/0x50 kernel/sched/core.c:3710 > autoremove_wake_function+0x80/0x370 kernel/sched/wait.c:375 > __wake_up_common+0x1d7/0x7d0 kernel/sched/wait.c:92 > __wake_up_common_lock+0x1c2/0x330 kernel/sched/wait.c:121 > __wake_up+0xe/0x10 kernel/sched/wait.c:145 > wakeup_kswapd+0x5f0/0x930 mm/vmscan.c:3982 > wake_all_kswapds+0x150/0x300 mm/page_alloc.c:3975 > __alloc_pages_slowpath+0x1ff1/0x2db0 mm/page_alloc.c:4246 > __alloc_pages_nodemask+0xa89/0xde0 mm/page_alloc.c:4549 > alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2106 > alloc_pages include/linux/gfp.h:509 [inline] > __get_free_pages+0xc/0x40 mm/page_alloc.c:4573 > pte_alloc_one_kernel+0x15/0x20 arch/x86/mm/pgtable.c:28 > __pte_alloc_kernel+0x23/0x220 mm/memory.c:439 > vmap_pte_range mm/vmalloc.c:144 [inline] > vmap_pmd_range mm/vmalloc.c:171 [inline] > vmap_pud_range mm/vmalloc.c:188 [inline] > vmap_p4d_range mm/vmalloc.c:205 [inline] > vmap_page_range_noflush+0x878/0xa80 mm/vmalloc.c:230 > vmap_page_range mm/vmalloc.c:243 [inline] > vm_map_ram+0x46c/0xf60 mm/vmalloc.c:1181 > ion_heap_clear_pages+0x2a/0x70 > drivers/staging/android/ion/ion_heap.c:100 > ion_heap_sglist_zero+0x24f/0x2d0 > drivers/staging/android/ion/ion_heap.c:121 > ion_heap_buffer_zero+0xf8/0x150 > drivers/staging/android/ion/ion_heap.c:143 > ion_system_heap_free+0x227/0x290 > drivers/staging/android/ion/ion_system_heap.c:163 > ion_buffer_destroy+0x15c/0x1c0 drivers/staging/android/ion/ion.c:119 > _ion_heap_freelist_drain+0x43e/0x6a0 > drivers/staging/android/ion/ion_heap.c:199 > ion_heap_freelist_drain+0x1f/0x30 > drivers/staging/android/ion/ion_heap.c:209 > ion_buffer_create drivers/staging/android/ion/ion.c:86 [inline] > ion_alloc+0x487/0xa60 drivers/staging/android/ion/ion.c:409 > ion_ioctl+0x216/0x41e drivers/staging/android/ion/ion-ioctl.c:76 > __do_compat_sys_ioctl fs/compat_ioctl.c:1052 [inline] > __se_compat_sys_ioctl fs/compat_ioctl.c:998 [inline] > __ia32_compat_sys_ioctl+0x20e/0x630 fs/compat_ioctl.c:998 > do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline] > do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397 > entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 > > -> #0 (&pgdat->kswapd_wait){....}: > lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3841 > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 > __wake_up_common_lock+0x19e/0x330 kernel/sched/wait.c:120 > __wake_up+0xe/0x10 kernel/sched/wait.c:145 > wakeup_kswapd+0x5f0/0x930 mm/vmscan.c:3982 > steal_suitable_fallback+0x538/0x830 mm/page_alloc.c:2217 > __rmqueue_fallback mm/page_alloc.c:2502 [inline] > __rmqueue mm/page_alloc.c:2528 [inline] > rmqueue_bulk mm/page_alloc.c:2550 [inline] > __rmqueue_pcplist mm/page_alloc.c:3021 [inline] > rmqueue_pcplist mm/page_alloc.c:3050 [inline] > rmqueue mm/page_alloc.c:3072 [inline] > get_page_from_freelist+0x318c/0x52a0 mm/page_alloc.c:3491 > __alloc_pages_nodemask+0x4f3/0xde0 mm/page_alloc.c:4529 > alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2106 > alloc_pages include/linux/gfp.h:509 [inline] > __get_free_pages+0xc/0x40 mm/page_alloc.c:4573 > tlb_next_batch mm/mmu_gather.c:29 [inline] > __tlb_remove_page_size+0x2e5/0x500 mm/mmu_gather.c:133 > __tlb_remove_page include/asm-generic/tlb.h:187 [inline] > zap_pte_range mm/memory.c:1093 [inline] > zap_pmd_range mm/memory.c:1192 [inline] > zap_pud_range mm/memory.c:1221 [inline] > zap_p4d_range mm/memory.c:1242 [inline] > unmap_page_range+0xf88/0x25b0 mm/memory.c:1263 > unmap_single_vma+0x19b/0x310 mm/memory.c:1308 > unmap_vmas+0x221/0x390 mm/memory.c:1339 > exit_mmap+0x2be/0x590 mm/mmap.c:3140 > __mmput kernel/fork.c:1051 [inline] > mmput+0x247/0x610 kernel/fork.c:1072 > exit_mm kernel/exit.c:545 [inline] > do_exit+0xdeb/0x2620 kernel/exit.c:854 > do_group_exit+0x177/0x440 kernel/exit.c:970 > get_signal+0x8b0/0x1980 kernel/signal.c:2517 > do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 > exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 > prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] > syscall_return_slowpath arch/x86/entry/common.c:268 [inline] > do_syscall_32_irqs_on arch/x86/entry/common.c:341 [inline] > do_fast_syscall_32+0xcd5/0xfb2 arch/x86/entry/common.c:397 > entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 > > other info that might help us debug this: > > Chain exists of: > &pgdat->kswapd_wait --> &base->lock --> &(&zone->lock)->rlock > > Possible unsafe locking scenario: > > CPU0 CPU1 > ---- ---- > lock(&(&zone->lock)->rlock); > lock(&base->lock); > lock(&(&zone->lock)->rlock); > lock(&pgdat->kswapd_wait); > > *** DEADLOCK *** > > 2 locks held by syz-executor0/8529: > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: spin_lock > include/linux/spinlock.h:329 [inline] > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: > zap_pte_range mm/memory.c:1051 [inline] > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: > zap_pmd_range mm/memory.c:1192 [inline] > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: > zap_pud_range mm/memory.c:1221 [inline] > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: > zap_p4d_range mm/memory.c:1242 [inline] > #0: 000000001be7b4ca (&(ptlock_ptr(page))->rlock#2){+.+.}, at: > unmap_page_range+0x98e/0x25b0 mm/memory.c:1263 > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: spin_lock > include/linux/spinlock.h:329 [inline] > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue_bulk > mm/page_alloc.c:2548 [inline] > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: __rmqueue_pcplist > mm/page_alloc.c:3021 [inline] > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue_pcplist > mm/page_alloc.c:3050 [inline] > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: rmqueue > mm/page_alloc.c:3072 [inline] > #1: 000000009bb7bae0 (&(&zone->lock)->rlock){-.-.}, at: > get_page_from_freelist+0x1bae/0x52a0 mm/page_alloc.c:3491 > > stack backtrace: > CPU: 0 PID: 8529 Comm: syz-executor0 Not tainted 4.20.0+ #297 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS > Google 01/01/2011 > Call Trace: > __dump_stack lib/dump_stack.c:77 [inline] > dump_stack+0x1d3/0x2c6 lib/dump_stack.c:113 > print_circular_bug.isra.34.cold.56+0x1bd/0x27d > kernel/locking/lockdep.c:1224 > check_prev_add kernel/locking/lockdep.c:1866 [inline] > check_prevs_add kernel/locking/lockdep.c:1979 [inline] > validate_chain kernel/locking/lockdep.c:2350 [inline] > __lock_acquire+0x3360/0x4c20 kernel/locking/lockdep.c:3338 > lock_acquire+0x1ed/0x520 kernel/locking/lockdep.c:3841 > __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] > _raw_spin_lock_irqsave+0x99/0xd0 kernel/locking/spinlock.c:152 > __wake_up_common_lock+0x19e/0x330 kernel/sched/wait.c:120 > __wake_up+0xe/0x10 kernel/sched/wait.c:145 > wakeup_kswapd+0x5f0/0x930 mm/vmscan.c:3982 > steal_suitable_fallback+0x538/0x830 mm/page_alloc.c:2217 > __rmqueue_fallback mm/page_alloc.c:2502 [inline] > __rmqueue mm/page_alloc.c:2528 [inline] > rmqueue_bulk mm/page_alloc.c:2550 [inline] > __rmqueue_pcplist mm/page_alloc.c:3021 [inline] > rmqueue_pcplist mm/page_alloc.c:3050 [inline] > rmqueue mm/page_alloc.c:3072 [inline] > get_page_from_freelist+0x318c/0x52a0 mm/page_alloc.c:3491 > __alloc_pages_nodemask+0x4f3/0xde0 mm/page_alloc.c:4529 > alloc_pages_current+0x10c/0x210 mm/mempolicy.c:2106 > alloc_pages include/linux/gfp.h:509 [inline] > __get_free_pages+0xc/0x40 mm/page_alloc.c:4573 > tlb_next_batch mm/mmu_gather.c:29 [inline] > __tlb_remove_page_size+0x2e5/0x500 mm/mmu_gather.c:133 > __tlb_remove_page include/asm-generic/tlb.h:187 [inline] > zap_pte_range mm/memory.c:1093 [inline] > zap_pmd_range mm/memory.c:1192 [inline] > zap_pud_range mm/memory.c:1221 [inline] > zap_p4d_range mm/memory.c:1242 [inline] > unmap_page_range+0xf88/0x25b0 mm/memory.c:1263 > unmap_single_vma+0x19b/0x310 mm/memory.c:1308 > unmap_vmas+0x221/0x390 mm/memory.c:1339 > exit_mmap+0x2be/0x590 mm/mmap.c:3140 > __mmput kernel/fork.c:1051 [inline] > mmput+0x247/0x610 kernel/fork.c:1072 > exit_mm kernel/exit.c:545 [inline] > do_exit+0xdeb/0x2620 kernel/exit.c:854 > do_group_exit+0x177/0x440 kernel/exit.c:970 > get_signal+0x8b0/0x1980 kernel/signal.c:2517 > do_signal+0x9c/0x21c0 arch/x86/kernel/signal.c:816 > exit_to_usermode_loop+0x2e5/0x380 arch/x86/entry/common.c:162 > prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] > syscall_return_slowpath arch/x86/entry/common.c:268 [inline] > do_syscall_32_irqs_on arch/x86/entry/common.c:341 [inline] > do_fast_syscall_32+0xcd5/0xfb2 arch/x86/entry/common.c:397 > entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139 > RIP: 0023:0xf7fe3849 > Code: Bad RIP value. > RSP: 002b:00000000f5f9d0cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036 > RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00000000c0184900 > RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000000 > RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > syz-executor0 (8529) used greatest stack depth: 10424 bytes left > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > audit: type=1326 audit(1546069676.863:33): auid=4294967295 uid=0 gid=0 > ses=4294967295 subj==unconfined pid=8664 comm="syz-executor1" > exe="/root/syz-executor1" sig=31 arch=40000003 syscall=265 compat=1 > ip=0xf7f82849 code=0x0 > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop5' (00000000c7588ca8): kobject_uevent_env > kobject: 'loop5' (00000000c7588ca8): fill_kobj_path: path > = '/devices/virtual/block/loop5' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop4' (00000000ebe25695): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop4' (00000000ebe25695): fill_kobj_path: path > = '/devices/virtual/block/loop4' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'loop0' (000000002925f66c): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop0' (000000002925f66c): fill_kobj_path: path > = '/devices/virtual/block/loop0' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): kobject_uevent_env > kobject: 'loop3' (0000000061a5b8df): fill_kobj_path: path > = '/devices/virtual/block/loop3' > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'kvm' (00000000eddbbf94): kobject_uevent_env > kobject: 'kvm' (00000000eddbbf94): fill_kobj_path: path > = '/devices/virtual/misc/kvm' > kobject: 'loop1' (0000000003dfbc9f): kobject_uevent_env > kobject: 'loop1' (0000000003dfbc9f): fill_kobj_path: path > = '/devices/virtual/block/loop1' > kobject: 'loop2' (00000000c253515f): kobject_uevent_env > kobject: 'loop2' (00000000c253515f): fill_kobj_path: path > = '/devices/virtual/block/loop2' > WARNING: CPU: 0 PID: 8908 at net/bridge/netfilter/ebtables.c:2086 > ebt_size_mwt net/bridge/netfilter/ebtables.c:2086 [inline] > WARNING: CPU: 0 PID: 8908 at net/bridge/netfilter/ebtables.c:2086 > size_entry_mwt net/bridge/netfilter/ebtables.c:2167 [inline] > WARNING: CPU: 0 PID: 8908 at net/bridge/netfilter/ebtables.c:2086 > compat_copy_entries+0x1088/0x1500 net/bridge/netfilter/ebtables.c:2206 > > > --- > This bug 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 bug report. See: > https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with > syzbot. >