====================================== | [ 3869.733232][ T11] ================================================================== | [ 3869.733705][ T11] BUG: KASAN: slab-use-after-free in vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan | [ 3869.734180][ T11] Read of size 8 at addr ffff88800a460bd0 by task kworker/u8:0/11 | [ 3869.734571][ T11] [ 3869.735103][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 3869.735737][ T11] Workqueue: netns cleanup_net [ 3869.736020][ T11] Call Trace: [ 3869.736209][ T11] [ 3869.736362][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 3869.736600][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 3869.736938][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 3869.737262][ T11] print_report (mm/kasan/report.c:489) [ 3869.737486][ T11] ? kasan_addr_to_slab (./arch/x86/include/asm/bitops.h:206 ./arch/x86/include/asm/bitops.h:238 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 ./include/linux/page-flags.h:481 mm/kasan/../slab.h:206 mm/kasan/common.c:38) [ 3869.737741][ T11] kasan_report (mm/kasan/report.c:603) [ 3869.737964][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 3869.738307][ T11] vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 3869.738642][ T11] ? __pfx_vlan_device_event (net/8021q/vlan.c:362) 8021q [ 3869.738966][ T11] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 3869.739323][ T11] ? netconsole_netdev_event (drivers/net/netconsole.c:991) [ 3869.739621][ T11] notifier_call_chain (kernel/notifier.c:93) [ 3869.739928][ T11] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 3869.740293][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 3869.740540][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 3869.740896][ T11] ? vrf_dellink (drivers/net/vrf.c:1708) vrf [ 3869.741171][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 3869.741518][ T11] default_device_exit_batch (net/core/dev.c:11629) [ 3869.741810][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 3869.742141][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 3869.742409][ T11] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:569 net/ipv4/nexthop.c:1918 net/ipv4/nexthop.c:2426 net/ipv4/nexthop.c:3754) [ 3869.742734][ T11] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 3869.742978][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 3869.743303][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 3869.743582][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 3869.743875][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 3869.744178][ T11] process_one_work (kernel/workqueue.c:2633) [ 3869.744452][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 3869.744697][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 3869.745029][ T11] ? assign_work (kernel/workqueue.c:1101) [ 3869.745266][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 3869.745535][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 3869.745811][ T11] kthread (kernel/kthread.c:388) [ 3869.746025][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 3869.746261][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 3869.746506][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 3869.746764][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 3869.766617][ T11] ================================================================== | [ 3869.767283][ T11] Disabling lock debugging due to kernel taint | [ 3869.767659][ T11] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 3869.768334][ T11] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 3869.769365][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 3869.770043][ T11] Workqueue: netns cleanup_net [ 3869.770310][ T11] RIP: 0010:vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 3869.770734][ T11] Code: 00 00 00 48 b9 00 00 00 00 00 fc ff df 49 89 c0 48 89 44 24 08 49 c1 e8 03 4d 8d 24 08 eb 2c 48 8d 53 30 48 89 d0 48 c1 e8 03 <80> 3c 08 00 0f 85 e0 00 00 00 48 8b 43 30 49 89 dd 48 83 e8 30 49 All code ======== 0: 00 00 add %al,(%rax) 2: 00 48 b9 add %cl,-0x47(%rax) 5: 00 00 add %al,(%rax) 7: 00 00 add %al,(%rax) 9: 00 fc add %bh,%ah b: ff (bad) c: df 49 89 fisttps -0x77(%rcx) f: c0 48 89 44 rorb $0x44,-0x77(%rax) 13: 24 08 and $0x8,%al 15: 49 c1 e8 03 shr $0x3,%r8 19: 4d 8d 24 08 lea (%r8,%rcx,1),%r12 1d: eb 2c jmp 0x4b 1f: 48 8d 53 30 lea 0x30(%rbx),%rdx 23: 48 89 d0 mov %rdx,%rax 26: 48 c1 e8 03 shr $0x3,%rax 2a:* 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) <-- trapping instruction 2e: 0f 85 e0 00 00 00 jne 0x114 34: 48 8b 43 30 mov 0x30(%rbx),%rax 38: 49 89 dd mov %rbx,%r13 3b: 48 83 e8 30 sub $0x30,%rax 3f: 49 rex.WB Code starting with the faulting instruction =========================================== 0: 80 3c 08 00 cmpb $0x0,(%rax,%rcx,1) 4: 0f 85 e0 00 00 00 jne 0xea a: 48 8b 43 30 mov 0x30(%rbx),%rax e: 49 89 dd mov %rbx,%r13 11: 48 83 e8 30 sub $0x30,%rax 15: 49 rex.WB [ 3869.771747][ T11] RSP: 0018:ffffc900000bf980 EFLAGS: 00010246 [ 3869.772074][ T11] RAX: 0000000000000000 RBX: ffffffffffffffd0 RCX: dffffc0000000000 [ 3869.772487][ T11] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff88800a460c24 [ 3869.772883][ T11] RBP: 1ffff92000017f33 R08: 1ffff1100119c21a R09: ffffc900000bf9b8 [ 3869.773312][ T11] R10: ffffffffaa33ca07 R11: 205d313154202020 R12: ffffed100119c21a [ 3869.773735][ T11] R13: ffff88800a460ba0 R14: ffff888009354000 R15: ffff888008ce1000 [ 3869.774187][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 3869.774676][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 3869.775036][ T11] CR2: 0000555c33bffdec CR3: 000000000628a005 CR4: 0000000000770ef0 [ 3869.775449][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 3869.775928][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 3869.776365][ T11] PKRU: 55555554 [ 3869.776584][ T11] Call Trace: [ 3869.776762][ T11] [ 3869.776954][ T11] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [ 3869.777208][ T11] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) [ 3869.777536][ T11] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) [ 3869.777843][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 3869.778207][ T11] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 3869.778584][ T11] ? netconsole_netdev_event (drivers/net/netconsole.c:991) [ 3869.778903][ T11] notifier_call_chain (kernel/notifier.c:93) [ 3869.779232][ T11] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 3869.779604][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 3869.779876][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 3869.780225][ T11] ? vrf_dellink (drivers/net/vrf.c:1708) vrf [ 3869.780505][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 3869.780851][ T11] default_device_exit_batch (net/core/dev.c:11629) [ 3869.781154][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 3869.781471][ T11] ? mutex_is_locked (./arch/x86/include/asm/atomic64_64.h:15 ./include/linux/atomic/atomic-arch-fallback.h:2569 ./include/linux/atomic/atomic-long.h:38 ./include/linux/atomic/atomic-instrumented.h:3161 kernel/locking/mutex.c:81 kernel/locking/mutex.c:91) [ 3869.781732][ T11] ? nexthop_net_exit_batch_rtnl (net/ipv4/nexthop.c:569 net/ipv4/nexthop.c:1918 net/ipv4/nexthop.c:2426 net/ipv4/nexthop.c:3754) [ 3869.782057][ T11] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 3869.782293][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 3869.782585][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 3869.782858][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 3869.783095][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 3869.783379][ T11] process_one_work (kernel/workqueue.c:2633) [ 3869.783651][ T11] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 3869.783888][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 3869.784180][ T11] ? assign_work (kernel/workqueue.c:1101) [ 3869.784443][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 3869.784703][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 3869.784967][ T11] kthread (kernel/kthread.c:388) [ 3869.785191][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 3869.785452][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 3869.785676][ T11] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: dump_stack_lvl:print_report:kasan_report:vxlan_netdevice_event vxlan_netdevice_event:notifier_call_chain:unregister_netdevice_many_notify:default_device_exit_batch