divide error: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 22144 Comm: syz-executor.2 Not tainted 5.6.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:tabledist.part.0+0x13f/0x170 net/sched/sch_netem.c:333 Code: e8 48 83 c4 08 5b 41 5c 41 5d 41 5e 5d c3 e8 d8 b5 15 fb 48 81 eb 00 10 00 00 eb a5 e8 ca b5 15 fb 43 8d 0c 24 44 89 f0 31 d2 f1 4d 29 e5 49 01 d5 eb c5 48 89 df e8 3f 5b 54 fb e9 0d ff ff RSP: 0018:ffffc90000006de8 EFLAGS: 00010246 RAX: 00000000e548d537 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff865fd1f6 RDI: 0000000000000005 RBP: ffffc90000006e10 R08: ffff88805ba9e5c0 R09: ffffed1013bac62f R10: ffffed1013bac62e R11: ffff88809dd63177 R12: ffffffff80000000 R13: 0000000000000000 R14: 00000000e548d537 R15: ffff88809dd63000 FS: 00007f8ccacc4700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28aaa55000 CR3: 000000005ae36000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tabledist net/sched/sch_netem.c:536 [inline] netem_enqueue+0x416/0x2e10 net/sched/sch_netem.c:536 __dev_xmit_skb net/core/dev.c:3708 [inline] __dev_queue_xmit+0x152b/0x3080 net/core/dev.c:4019 dev_queue_xmit+0x18/0x20 net/core/dev.c:4083 br_dev_queue_push_xmit+0x3f3/0x5e0 net/bridge/br_forward.c:52 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] br_forward_finish+0xfa/0x3f0 net/bridge/br_forward.c:65 NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] __br_forward+0x63c/0xaf0 net/bridge/br_forward.c:109 deliver_clone+0x61/0xc0 net/bridge/br_forward.c:125 maybe_deliver+0x2e1/0x3b0 net/bridge/br_forward.c:181 br_flood+0x13a/0x3d0 net/bridge/br_forward.c:223 br_dev_xmit+0x987/0x1540 net/bridge/br_device.c:99 __netdev_start_xmit include/linux/netdevice.h:4523 [inline] netdev_start_xmit include/linux/netdevice.h:4537 [inline] xmit_one net/core/dev.c:3475 [inline] dev_hard_start_xmit+0x1a3/0x9b0 net/core/dev.c:3491 __dev_queue_xmit+0x25df/0x3080 net/core/dev.c:4050 dev_queue_xmit+0x18/0x20 net/core/dev.c:4083 neigh_resolve_output net/core/neighbour.c:1487 [inline] neigh_resolve_output+0x5c4/0x990 net/core/neighbour.c:1467 neigh_output include/net/neighbour.h:510 [inline] ip6_finish_output2+0x109a/0x25c0 net/ipv6/ip6_output.c:116 __ip6_finish_output+0x444/0xaa0 net/ipv6/ip6_output.c:142 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x25e/0x880 net/ipv6/ip6_output.c:175 dst_output include/net/dst.h:436 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] ndisc_send_skb+0xf1f/0x1490 net/ipv6/ndisc.c:505 ndisc_send_rs+0x134/0x720 net/ipv6/ndisc.c:699 addrconf_rs_timer+0x30f/0x6e0 net/ipv6/addrconf.c:3879 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:lock_is_held_type+0x27f/0x320 kernel/locking/lockdep.c:4526 Code: c1 e8 03 80 3c 10 00 0f 85 88 00 00 00 48 83 3d 1e 27 59 08 00 74 31 48 8b 7d c0 57 9d 0f 1f 44 00 00 48 83 c4 20 44 89 e0 5b <41> 5c 41 5d 41 5e 41 5f 5d c3 45 31 e4 e9 6e ff ff ff 41 bc 01 00 RSP: 0018:ffffc90001d87720 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: 1ffff920003b0eea RCX: ffff88805ba9ee58 RDX: dffffc0000000000 RSI: ffffffff89bac240 RDI: 0000000000000286 RBP: ffffc90001d87740 R08: ffff88805ba9e5c0 R09: ffffed1015d0707c R10: ffffed1015d0707b R11: ffff8880ae8383db R12: 0000000000000001 R13: ffff88805ba9ee80 R14: ffffffff89bac240 R15: 0000000000000001 lock_is_held include/linux/lockdep.h:361 [inline] rcu_read_lock_held kernel/rcu/update.c:283 [inline] rcu_read_lock_held+0x9c/0xb0 kernel/rcu/update.c:277 xa_entry include/linux/xarray.h:1180 [inline] xas_reload include/linux/xarray.h:1527 [inline] filemap_map_pages+0xefb/0x14e0 mm/filemap.c:2607 do_fault_around mm/memory.c:3634 [inline] do_read_fault mm/memory.c:3668 [inline] do_fault mm/memory.c:3802 [inline] handle_pte_fault mm/memory.c:4033 [inline] __handle_mm_fault+0x2de6/0x3cc0 mm/memory.c:4163 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4200 faultin_page mm/gup.c:659 [inline] __get_user_pages+0x7b5/0x1ac0 mm/gup.c:870 populate_vma_page_range+0x20d/0x2a0 mm/gup.c:1181 __mm_populate+0x204/0x380 mm/gup.c:1229 mm_populate include/linux/mm.h:2343 [inline] vm_mmap_pgoff+0x213/0x230 mm/util.c:511 ksys_mmap_pgoff+0xf7/0x630 mm/mmap.c:1597 __do_sys_mmap arch/x86/kernel/sys_x86_64.c:99 [inline] __se_sys_mmap arch/x86/kernel/sys_x86_64.c:90 [inline] __x64_sys_mmap+0xe9/0x1b0 arch/x86/kernel/sys_x86_64.c:90 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c449 Code: ad b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 7b b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f8ccacc3c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f8ccacc46d4 RCX: 000000000045c449 RDX: 0000000000000003 RSI: 0000000000b36000 RDI: 0000000020000000 RBP: 000000000076c060 R08: ffffffffffffffff R09: 0000000000000000 R10: 0000000000008031 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000737 R14: 00000000004c9b5f R15: 000000000076c06c Modules linked in: ---[ end trace 2733d326530f078d ]--- RIP: 0010:tabledist.part.0+0x13f/0x170 net/sched/sch_netem.c:333 Code: e8 48 83 c4 08 5b 41 5c 41 5d 41 5e 5d c3 e8 d8 b5 15 fb 48 81 eb 00 10 00 00 eb a5 e8 ca b5 15 fb 43 8d 0c 24 44 89 f0 31 d2 f1 4d 29 e5 49 01 d5 eb c5 48 89 df e8 3f 5b 54 fb e9 0d ff ff RSP: 0018:ffffc90000006de8 EFLAGS: 00010246 RAX: 00000000e548d537 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff865fd1f6 RDI: 0000000000000005 RBP: ffffc90000006e10 R08: ffff88805ba9e5c0 R09: ffffed1013bac62f R10: ffffed1013bac62e R11: ffff88809dd63177 R12: ffffffff80000000 R13: 0000000000000000 R14: 00000000e548d537 R15: ffff88809dd63000 FS: 00007f8ccacc4700(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f28aaa55000 CR3: 000000005ae36000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400