IPVS: sync thread started: state = BACKUP, mcast_ifn = gre0, syncid = 1, id = 0 protocol 88fb is buggy, dev hsr_slave_0 protocol 88fb is buggy, dev hsr_slave_1 protocol 88fb is buggy, dev hsr_slave_0 ================================================================== BUG: KASAN: use-after-free in __read_once_size include/linux/compiler.h:186 [inline] BUG: KASAN: use-after-free in dev_queue_xmit_nit+0x74b/0x8c0 net/core/dev.c:1929 Read of size 8 at addr ffff888061264e68 by task kworker/u4:2/29 CPU: 0 PID: 29 Comm: kworker/u4:2 Not tainted 4.14.129 #23 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x138/0x19c lib/dump_stack.c:53 print_address_description.cold+0x7c/0x1dc mm/kasan/report.c:252 kasan_report_error mm/kasan/report.c:351 [inline] kasan_report mm/kasan/report.c:409 [inline] kasan_report.cold+0xa9/0x2af mm/kasan/report.c:393 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:430 __read_once_size include/linux/compiler.h:186 [inline] dev_queue_xmit_nit+0x74b/0x8c0 net/core/dev.c:1929 xmit_one net/core/dev.c:3005 [inline] dev_hard_start_xmit+0xa7/0x8b0 net/core/dev.c:3025 __dev_queue_xmit+0x1d95/0x25e0 net/core/dev.c:3525 dev_queue_xmit+0x18/0x20 net/core/dev.c:3558 hsr_xmit net/hsr/hsr_forward.c:237 [inline] hsr_forward_do net/hsr/hsr_forward.c:295 [inline] hsr_forward_skb+0xbbe/0x1940 net/hsr/hsr_forward.c:373 send_hsr_supervision_frame+0x892/0xec0 net/hsr/hsr_device.c:319 hsr_announce+0xf5/0x340 net/hsr/hsr_device.c:348 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1634 [inline] __run_timers kernel/time/timer.c:1602 [inline] run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1064 apic_timer_interrupt+0x8e/0xa0 arch/x86/entry/entry_64.S:789 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:778 [inline] RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 kernel/locking/spinlock.c:192 RSP: 0018:ffff8880a9ef7b80 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff10 RAX: 1ffffffff0ee29f1 RBX: 0000000000000286 RCX: 1ffff110153dc121 RDX: dffffc0000000000 RSI: ffff8880a9ee0910 RDI: 0000000000000286 RBP: ffff8880a9ef7b90 R08: ffff8880a9ee0040 R09: ffff8880a9ee0908 R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff87792760 R13: 0000000000000286 R14: ffffffff877927a8 R15: ffffffff87791628 swake_up+0x4d/0x60 kernel/sched/swait.c:39 rcu_gp_kthread_wake+0x8d/0xd0 kernel/rcu/tree.c:1812 rcu_report_qs_rsp+0x12c/0x1a0 kernel/rcu/tree.c:2390 rcu_report_unblock_qs_rnp.constprop.0+0x19e/0x1e0 kernel/rcu/tree.c:2488 rcu_read_unlock_special+0x895/0xd40 kernel/rcu/tree_plugin.h:526 __rcu_read_unlock+0x161/0x170 kernel/rcu/update.c:260 rcu_read_unlock include/linux/rcupdate.h:684 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:420 [inline] batadv_nc_worker+0x1bb/0x6d0 net/batman-adv/network-coding.c:726 process_one_work+0x863/0x1600 kernel/workqueue.c:2114 worker_thread+0x5d9/0x1050 kernel/workqueue.c:2248 kthread+0x319/0x430 kernel/kthread.c:232 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:404 Allocated by task 19953: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 kmem_cache_alloc_trace+0x152/0x790 mm/slab.c:3618 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] fanout_add net/packet/af_packet.c:1735 [inline] packet_setsockopt+0x1c07/0x2830 net/packet/af_packet.c:3849 SYSC_setsockopt net/socket.c:1865 [inline] SyS_setsockopt+0x13c/0x210 net/socket.c:1844 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 Freed by task 19951: save_stack_trace+0x16/0x20 arch/x86/kernel/stacktrace.c:59 save_stack+0x45/0xd0 mm/kasan/kasan.c:447 set_track mm/kasan/kasan.c:459 [inline] kasan_slab_free+0x75/0xc0 mm/kasan/kasan.c:524 __cache_free mm/slab.c:3496 [inline] kfree+0xcc/0x270 mm/slab.c:3815 packet_release+0x776/0xb50 net/packet/af_packet.c:3059 __sock_release+0xce/0x2b0 net/socket.c:602 sock_close+0x1b/0x30 net/socket.c:1139 __fput+0x275/0x7a0 fs/file_table.c:210 ____fput+0x16/0x20 fs/file_table.c:244 task_work_run+0x114/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1da/0x220 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x42/0xb7 The buggy address belongs to the object at ffff8880612645c0 which belongs to the cache kmalloc-4096 of size 4096 The buggy address is located 2216 bytes inside of 4096-byte region [ffff8880612645c0, ffff8880612655c0) The buggy address belongs to the page: page:ffffea0001849900 count:1 mapcount:0 mapping:ffff8880612645c0 index:0x0 compound_mapcount: 0 flags: 0x1fffc0000008100(slab|head) raw: 01fffc0000008100 ffff8880612645c0 0000000000000000 0000000100000001 raw: ffffea00024b2e20 ffffea00018c2e20 ffff8880aa800dc0 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff888061264d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888061264d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff888061264e00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff888061264e80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff888061264f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================