====================================== | [ 304.270105][ T72] ================================================================== | [ 304.270576][ T72] 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 | [ 304.271101][ T72] Read of size 8 at addr ffff888006560bd0 by task kworker/u8:1/72 | [ 304.271491][ T72] [ 304.272033][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 304.272671][ T72] Workqueue: netns cleanup_net [ 304.272924][ T72] Call Trace: [ 304.273101][ T72] [ 304.273251][ T72] dump_stack_lvl (lib/dump_stack.c:107) [ 304.273486][ T72] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 304.273822][ T72] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 304.274144][ T72] print_report (mm/kasan/report.c:489) [ 304.274371][ T72] ? 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) [ 304.274626][ T72] kasan_report (mm/kasan/report.c:603) [ 304.274849][ T72] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 304.275173][ T72] vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 304.275488][ T72] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 304.275829][ T72] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) [ 304.276077][ T72] ? mirred_device_event (./include/linux/spinlock.h:392 net/sched/act_mirred.c:543) act_mirred [ 304.276408][ T72] notifier_call_chain (kernel/notifier.c:93) [ 304.276669][ T72] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 304.276993][ T72] ? 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) [ 304.277238][ T72] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 304.277662][ T72] ? vrf_dellink (drivers/net/vrf.c:1708) vrf [ 304.277932][ T72] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 304.278289][ T72] default_device_exit_batch (net/core/dev.c:11629) [ 304.278572][ T72] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 304.278935][ T72] ? 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) [ 304.279198][ T72] ? 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) [ 304.279515][ T72] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 304.279749][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 304.280060][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 304.280312][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 304.280549][ T72] ? process_one_work (kernel/workqueue.c:2609) [ 304.280862][ T72] process_one_work (kernel/workqueue.c:2633) [ 304.281123][ T72] ? 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) [ 304.281407][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 304.281680][ T72] ? assign_work (kernel/workqueue.c:1101) [ 304.281957][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 304.282252][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 304.282628][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 304.282933][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 304.283223][ T72] kthread (kernel/kthread.c:388) [ 304.283438][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 304.283716][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 304.283942][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 304.284177][ T72] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | [ 304.303335][ T72] ================================================================== | [ 304.303777][ T72] Disabling lock debugging due to kernel taint | [ 304.304142][ T72] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 304.304874][ T72] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 304.305907][ T72] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 304.306636][ T72] Workqueue: netns cleanup_net [ 304.306947][ T72] RIP: 0010:vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 304.307343][ T72] 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 [ 304.308454][ T72] RSP: 0018:ffffc9000052f980 EFLAGS: 00010246 [ 304.308786][ T72] RAX: 0000000000000000 RBX: ffffffffffffffd0 RCX: dffffc0000000000 [ 304.309207][ T72] RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff888006560c24 [ 304.309604][ T72] RBP: 1ffff920000a5f33 R08: 1ffff110009ea81a R09: ffffc9000052f9b8 [ 304.310001][ T72] R10: ffffffffb173ca07 R11: 205d323754202020 R12: ffffed10009ea81a [ 304.310401][ T72] R13: ffff888006560ba0 R14: ffff88800822c000 R15: ffff888004f54000 [ 304.310795][ T72] FS: 0000000000000000(0000) GS:ffff88802f000000(0000) knlGS:0000000000000000 [ 304.311239][ T72] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 304.311569][ T72] CR2: 00005633a2c8fdec CR3: 0000000003ca2006 CR4: 0000000000770ef0 [ 304.311969][ T72] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 304.312365][ T72] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 304.312760][ T72] PKRU: 55555554 [ 304.312940][ T72] Call Trace: [ 304.313118][ T72] [ 304.313268][ T72] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [ 304.313531][ T72] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) [ 304.313838][ T72] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) [ 304.314178][ T72] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 304.314522][ T72] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 304.314895][ T72] ? _raw_spin_unlock (./arch/x86/include/asm/preempt.h:94 ./include/linux/spinlock_api_smp.h:143 kernel/locking/spinlock.c:186) [ 304.315178][ T72] ? mirred_device_event (./include/linux/spinlock.h:392 net/sched/act_mirred.c:543) act_mirred [ 304.315535][ T72] notifier_call_chain (kernel/notifier.c:93) [ 304.315827][ T72] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 304.316166][ T72] ? 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) [ 304.316434][ T72] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 304.316803][ T72] ? vrf_dellink (drivers/net/vrf.c:1708) vrf [ 304.317086][ T72] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 304.317420][ T72] default_device_exit_batch (net/core/dev.c:11629) [ 304.317753][ T72] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 304.318089][ T72] ? 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) [ 304.318354][ T72] ? 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) [ 304.318670][ T72] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 304.318897][ T72] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 304.319179][ T72] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 304.319430][ T72] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 304.319668][ T72] ? process_one_work (kernel/workqueue.c:2609) [ 304.319928][ T72] process_one_work (kernel/workqueue.c:2633) [ 304.320179][ T72] ? 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) [ 304.320411][ T72] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 304.320685][ T72] ? assign_work (kernel/workqueue.c:1101) [ 304.320919][ T72] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 304.321156][ T72] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 304.321489][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 304.321748][ T72] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 304.322006][ T72] kthread (kernel/kthread.c:388) [ 304.322218][ T72] ? __pfx_kthread (kernel/kthread.c:341) [ 304.322450][ T72] ret_from_fork (arch/x86/kernel/process.c:147) [ 304.322675][ T72] ? __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