IPVS: Creating netns size=2536 id=2 IPVS: Creating netns size=2536 id=3 IPVS: Creating netns size=2536 id=4 IPVS: Creating netns size=2536 id=5 ================================================================== BUG: KASAN: slab-out-of-bounds in __ptr_ring_produce include/linux/ptr_ring.h:107 [inline] BUG: KASAN: slab-out-of-bounds in ptr_ring_produce include/linux/ptr_ring.h:130 [inline] BUG: KASAN: slab-out-of-bounds in skb_array_produce include/linux/skb_array.h:48 [inline] BUG: KASAN: slab-out-of-bounds in tun_net_xmit+0x10bd/0x1180 drivers/net/tun.c:920 Read of size 8 at addr ffff8801cb159b78 by task swapper/1/0 CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.9.98-g63a812b #20 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ffff8801db3073e8 ffffffff81eb0e89 ffffea00072c5640 ffff8801cb159b78 0000000000000000 ffff8801cb159b78 ffff8801d97ab848 ffff8801db307420 ffffffff815652cb ffff8801cb159b78 0000000000000008 0000000000000000 Call Trace: [ 23.911932] [] __dump_stack lib/dump_stack.c:15 [inline] [ 23.911932] [] dump_stack+0xc1/0x128 lib/dump_stack.c:51 [] print_address_description+0x6c/0x234 mm/kasan/report.c:256 [] kasan_report_error mm/kasan/report.c:355 [inline] [] kasan_report.cold.6+0x242/0x2fe mm/kasan/report.c:412 [] __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 [] __ptr_ring_produce include/linux/ptr_ring.h:107 [inline] [] ptr_ring_produce include/linux/ptr_ring.h:130 [inline] [] skb_array_produce include/linux/skb_array.h:48 [inline] [] tun_net_xmit+0x10bd/0x1180 drivers/net/tun.c:920 [] __netdev_start_xmit include/linux/netdevice.h:4062 [inline] [] netdev_start_xmit include/linux/netdevice.h:4071 [inline] [] xmit_one net/core/dev.c:2955 [inline] [] dev_hard_start_xmit+0x197/0x8b0 net/core/dev.c:2971 [] sch_direct_xmit+0x2bc/0x590 net/sched/sch_generic.c:182 [] __dev_xmit_skb net/core/dev.c:3151 [inline] [] __dev_queue_xmit+0x1742/0x2080 net/core/dev.c:3419 [] dev_queue_xmit+0x17/0x20 net/core/dev.c:3484 [] neigh_direct_output+0x15/0x20 net/core/neighbour.c:1362 [] dst_neigh_output include/net/dst.h:470 [inline] [] ip6_finish_output2+0x8a8/0x1d00 net/ipv6/ip6_output.c:119 [] ip6_finish_output+0x3b8/0x760 net/ipv6/ip6_output.c:145 [] NF_HOOK_COND include/linux/netfilter.h:246 [inline] [] ip6_output+0x1f3/0x6e0 net/ipv6/ip6_output.c:162 [] dst_output include/net/dst.h:507 [inline] [] NF_HOOK_THRESH.constprop.41+0x286/0x450 include/linux/netfilter.h:232 [] NF_HOOK include/linux/netfilter.h:255 [inline] [] mld_sendpack+0x649/0xbd0 net/ipv6/mcast.c:1660 [] mld_send_cr net/ipv6/mcast.c:1956 [inline] [] mld_ifc_timer_expire+0x3ba/0x740 net/ipv6/mcast.c:2454 [] call_timer_fn+0x163/0x6e0 kernel/time/timer.c:1319 [] expire_timers kernel/time/timer.c:1359 [inline] [] __run_timers kernel/time/timer.c:1658 [inline] [] run_timer_softirq+0x1047/0x1590 kernel/time/timer.c:1684 [] __do_softirq+0x20b/0x937 kernel/softirq.c:284 [] invoke_softirq kernel/softirq.c:364 [inline] [] irq_exit+0x147/0x190 kernel/softirq.c:405 [] exiting_irq arch/x86/include/asm/apic.h:659 [inline] [] smp_apic_timer_interrupt+0x81/0xa0 arch/x86/kernel/apic/apic.c:960 [] apic_timer_interrupt+0xa0/0xb0 arch/x86/entry/entry_64.S:648 [ 24.295915] [] ? native_safe_halt+0x6/0x10 arch/x86/include/asm/irqflags.h:53 [] arch_safe_halt arch/x86/include/asm/paravirt.h:104 [inline] [] default_idle+0x55/0x360 arch/x86/kernel/process.c:295 [] arch_cpu_idle+0x10/0x20 arch/x86/kernel/process.c:286 [] default_idle_call+0x45/0x60 kernel/sched/idle.c:97 [] cpuidle_idle_call kernel/sched/idle.c:155 [inline] [] cpu_idle_loop kernel/sched/idle.c:248 [inline] [] cpu_startup_entry+0x2b5/0x380 kernel/sched/idle.c:303 [] start_secondary+0x323/0x400 arch/x86/kernel/smpboot.c:254 Allocated by task 3845: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:609 __kmalloc+0x11d/0x300 mm/slub.c:3741 kmalloc_array include/linux/slab.h:582 [inline] kcalloc include/linux/slab.h:593 [inline] __ptr_ring_init_queue_alloc include/linux/ptr_ring.h:356 [inline] ptr_ring_resize_multiple include/linux/ptr_ring.h:445 [inline] skb_array_resize_multiple include/linux/skb_array.h:169 [inline] tun_queue_resize drivers/net/tun.c:2521 [inline] tun_device_event+0x3e3/0xa10 drivers/net/tun.c:2539 notifier_call_chain+0xb4/0x1d0 kernel/notifier.c:93 __raw_notifier_call_chain kernel/notifier.c:394 [inline] raw_notifier_call_chain+0x2d/0x40 kernel/notifier.c:401 call_netdevice_notifiers_info+0x55/0x70 net/core/dev.c:1647 call_netdevice_notifiers+0x70/0xa0 net/core/dev.c:1663 do_setlink+0xc3b/0x30d0 net/core/rtnetlink.c:2048 rtnl_group_changelink net/core/rtnetlink.c:2414 [inline] rtnl_newlink+0xbd0/0x1550 net/core/rtnetlink.c:2562 rtnetlink_rcv_msg+0x49c/0x650 net/core/rtnetlink.c:4059 netlink_rcv_skb+0x145/0x370 net/netlink/af_netlink.c:2356 rtnetlink_rcv+0x2a/0x40 net/core/rtnetlink.c:4065 netlink_unicast_kernel net/netlink/af_netlink.c:1278 [inline] netlink_unicast+0x4d8/0x6f0 net/netlink/af_netlink.c:1304 netlink_sendmsg+0x78b/0xc10 net/netlink/af_netlink.c:1850 sock_sendmsg_nosec net/socket.c:635 [inline] sock_sendmsg+0xcc/0x110 net/socket.c:645 ___sys_sendmsg+0x6fc/0x840 net/socket.c:1969 __sys_sendmsg+0xd9/0x190 net/socket.c:2003 SYSC_sendmsg net/socket.c:2014 [inline] SyS_sendmsg+0x2d/0x50 net/socket.c:2010 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb Freed by task 2070: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:57 save_stack+0x43/0xd0 mm/kasan/kasan.c:505 set_track mm/kasan/kasan.c:517 [inline] kasan_slab_free+0x72/0xc0 mm/kasan/kasan.c:582 slab_free_hook mm/slub.c:1355 [inline] slab_free_freelist_hook mm/slub.c:1377 [inline] slab_free mm/slub.c:2958 [inline] kfree+0xfb/0x310 mm/slub.c:3878 kernfs_fop_write+0x181/0x460 fs/kernfs/file.c:330 __vfs_write+0x115/0x580 fs/read_write.c:507 vfs_write+0x187/0x530 fs/read_write.c:557 SYSC_write fs/read_write.c:604 [inline] SyS_write+0xd9/0x1c0 fs/read_write.c:596 do_syscall_64+0x1a6/0x490 arch/x86/entry/common.c:282 entry_SYSCALL_64_after_swapgs+0x5d/0xdb The buggy address belongs to the object at ffff8801cb159b70 which belongs to the cache kmalloc-8 of size 8 The buggy address is located 0 bytes to the right of 8-byte region [ffff8801cb159b70, ffff8801cb159b78) The buggy address belongs to the page: page:ffffea00072c5640 count:1 mapcount:0 mapping: (null) index:0x0 flags: 0x8000000000000080(slab) page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cb159a00: fc 00 fc fc 00 fc fc 00 fc fc 00 fc fc 00 fc fc ffff8801cb159a80: 00 fc fc 00 fc fc 00 fc fc fb fc fc fb fc fc 00 >ffff8801cb159b00: fc fc 00 fc fc 00 fc fc 00 fc fc 00 fc fc 00 fc ^ ffff8801cb159b80: fc fb fc fc fb fc fc 00 fc fc 00 fc fc 00 fc fc ffff8801cb159c00: 00 fc fc 00 fc fc 00 fc fc 00 fc fc 04 fc fc fb ==================================================================