IPv6: ADDRCONF(NETDEV_UP): veth1: link is not ready IPv6: ADDRCONF(NETDEV_CHANGE): veth1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0: link becomes ready 8021q: adding VLAN 0 to HW filter on device team0 ================================================================== BUG: KASAN: use-after-free in dev_map_flush_old kernel/bpf/devmap.c:389 [inline] BUG: KASAN: use-after-free in __dev_map_entry_free+0x2ab/0x300 kernel/bpf/devmap.c:403 Read of size 8 at addr ffff8801cb58ebc8 by task kthreadd/2 CPU: 0 PID: 2 Comm: kthreadd Not tainted 4.19.0-rc2+ #94 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+0x1c4/0x2b4 lib/dump_stack.c:113 print_address_description.cold.8+0x9/0x1ff mm/kasan/report.c:256 kasan_report_error mm/kasan/report.c:354 [inline] kasan_report.cold.9+0x242/0x309 mm/kasan/report.c:412 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433 dev_map_flush_old kernel/bpf/devmap.c:389 [inline] __dev_map_entry_free+0x2ab/0x300 kernel/bpf/devmap.c:403 __rcu_reclaim kernel/rcu/rcu.h:236 [inline] rcu_do_batch kernel/rcu/tree.c:2576 [inline] invoke_rcu_callbacks kernel/rcu/tree.c:2880 [inline] __rcu_process_callbacks kernel/rcu/tree.c:2847 [inline] rcu_process_callbacks+0xf23/0x2670 kernel/rcu/tree.c:2864 __do_softirq+0x30b/0xad8 kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17f/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1cb/0x760 arch/x86/kernel/apic/apic.c:1056 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:864 RIP: 0010:ktime_get_with_offset+0x9d/0x470 kernel/time/timekeeping.c:791 Code: f2 f2 65 48 8b 04 25 28 00 00 00 48 89 45 d0 31 c0 e8 57 09 11 00 48 8d 3c dd 80 2e 2d 88 48 89 f8 48 c1 e8 03 42 80 3c 20 00 <0f> 85 78 03 00 00 48 8b 04 dd 80 2e 2d 88 31 ff 8b 1d f1 b3 e3 08 RSP: 0018:ffff8801d9a5ed28 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff105a5d1 RBX: 0000000000000001 RCX: 1ffff10039e8f115 RDX: 0000000000000000 RSI: ffffffff816dc5d9 RDI: ffffffff882d2e88 RBP: ffff8801d9a5ee28 R08: ffff8801d9a50080 R09: 0000000000000006 R10: fffffbfff153be01 R11: 0000000000000001 R12: dffffc0000000000 R13: 0000000000000000 R14: ffff8801d9a5ee00 R15: ffff8801cf478280 ktime_get_boottime include/linux/timekeeping.h:95 [inline] ktime_get_boot_ns include/linux/timekeeping.h:136 [inline] copy_process+0x1ae1/0x8770 kernel/fork.c:1789 _do_fork+0x1cb/0x11d0 kernel/fork.c:2167 kernel_thread+0x34/0x40 kernel/fork.c:2226 create_kthread kernel/kthread.c:269 [inline] kthreadd+0x639/0x890 kernel/kthread.c:587 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 Allocated by task 5633: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc+0xc7/0xe0 mm/kasan/kasan.c:553 kmem_cache_alloc_trace+0x152/0x750 mm/slab.c:3620 kmalloc include/linux/slab.h:513 [inline] kzalloc include/linux/slab.h:707 [inline] dev_map_alloc+0x210/0x810 kernel/bpf/devmap.c:102 find_and_alloc_map kernel/bpf/syscall.c:129 [inline] map_create+0x3bd/0x10f0 kernel/bpf/syscall.c:509 __do_sys_bpf kernel/bpf/syscall.c:2356 [inline] __se_sys_bpf kernel/bpf/syscall.c:2333 [inline] __x64_sys_bpf+0x303/0x510 kernel/bpf/syscall.c:2333 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x49/0xbe Freed by task 24: save_stack+0x43/0xd0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] __kasan_slab_free+0x102/0x150 mm/kasan/kasan.c:521 kasan_slab_free+0xe/0x10 mm/kasan/kasan.c:528 __cache_free mm/slab.c:3498 [inline] kfree+0xcf/0x230 mm/slab.c:3813 dev_map_free+0x514/0x690 kernel/bpf/devmap.c:192 bpf_map_free_deferred+0xba/0xf0 kernel/bpf/syscall.c:290 process_one_work+0xc90/0x1b90 kernel/workqueue.c:2153 worker_thread+0x17f/0x1390 kernel/workqueue.c:2296 kthread+0x35a/0x420 kernel/kthread.c:246 ret_from_fork+0x3a/0x50 arch/x86/entry/entry_64.S:413 The buggy address belongs to the object at ffff8801cb58eac0 which belongs to the cache kmalloc-512 of size 512 The buggy address is located 264 bytes inside of 512-byte region [ffff8801cb58eac0, ffff8801cb58ecc0) The buggy address belongs to the page: page:ffffea00072d6380 count:1 mapcount:0 mapping:ffff8801da800940 index:0x0 flags: 0x2fffc0000000100(slab) raw: 02fffc0000000100 ffffea00072eac48 ffffea00072d6488 ffff8801da800940 raw: 0000000000000000 ffff8801cb58e0c0 0000000100000006 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff8801cb58ea80: fc fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb ffff8801cb58eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff8801cb58eb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff8801cb58ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff8801cb58ec80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc ==================================================================