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[209.132.180.67]) by mx.google.com with ESMTP id w8si29726929pgm.467.2019.01.02.01.19.46; Wed, 02 Jan 2019 01:20:01 -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; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=appspotmail.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728975AbfABIvG (ORCPT + 99 others); Wed, 2 Jan 2019 03:51:06 -0500 Received: from mail-io1-f70.google.com ([209.85.166.70]:35335 "EHLO mail-io1-f70.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726293AbfABIvF (ORCPT ); Wed, 2 Jan 2019 03:51:05 -0500 Received: by mail-io1-f70.google.com with SMTP id x12so14214002ioj.2 for ; Wed, 02 Jan 2019 00:51:04 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:date:message-id:subject:from:to; bh=WB0LvXswhy7tE7XnbY0bhz8Q5r5rtXi7F75d7q5Dp+o=; b=K8We1iDafxXRFPFP83vg23tbz4H8LlvgShkwpZpCkOgMXajKuz2ua9mC/rzAqfilOZ xZDC/8Q6nPHiAIZKlCeYixZrDVtIxAZb53Ckkjor+YrJ9jfgP96VvDULsqvyDBWOmyYW z0vSil3mgaC85WE0iAGkpqeRQeQlQs7aVpo5aj67/slfIuOmDztLu2u+jkv1uc7rymtB gzPvQNg28KFm6wCC/EVr0zzGcHLaBBAmWfTSee5r3rMU0XwM6ZdRJndVxHfuIH9Pm1JK IUIhIPz+KVdZ9+cGY6E9mrwolg9VSwNFGw4TmdyfYTFCBJHK1ecmXOFs/nizgPSweNed hDww== X-Gm-Message-State: AJcUukf0S5fzfD4jkf8bSyJyLnjHV98NfLPDbp2IQU6E+cHdKriklX4r mhTpuJY06VCzWNLRDwzFrTY26juoa3q21341eIPOUKRNVPyf MIME-Version: 1.0 X-Received: by 2002:a5e:d50b:: with SMTP id e11mr6877103iom.25.1546419063648; Wed, 02 Jan 2019 00:51:03 -0800 (PST) Date: Wed, 02 Jan 2019 00:51:03 -0800 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000f67ca2057e75bec3@google.com> Subject: possible deadlock in __wake_up_common_lock From: syzbot To: 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, vbabka@suse.cz, xieyisheng1@huawei.com, zhongjiang@huawei.com Content-Type: text/plain; charset="UTF-8"; format=flowed; delsp=yes Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 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. 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.