====================================== | [ 172.183369][ T11] ================================================================== | [ 172.183850][ T11] BUG: KASAN: use-after-free in vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan | [ 172.184320][ T11] Read of size 8 at addr ffff888003cd0bf0 by task kworker/u8:0/11 | [ 172.184731][ T11] [ 172.185291][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 172.185925][ T11] Workqueue: netns cleanup_net [ 172.186194][ T11] Call Trace: [ 172.186379][ T11] [ 172.186549][ T11] dump_stack_lvl (lib/dump_stack.c:107) [ 172.186787][ T11] print_address_description.constprop.0 (mm/kasan/report.c:378) [ 172.187185][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 172.187560][ T11] print_report (mm/kasan/report.c:489) [ 172.187811][ 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) [ 172.188108][ T11] kasan_report (mm/kasan/report.c:603) [ 172.188359][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 172.188692][ T11] vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 172.189062][ T11] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 172.189521][ T11] ? netconsole_netdev_event (drivers/net/netconsole.c:991) [ 172.189875][ T11] notifier_call_chain (kernel/notifier.c:93) [ 172.190188][ T11] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 172.190541][ 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) [ 172.190828][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 172.191210][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 172.191543][ T11] default_device_exit_batch (net/core/dev.c:11629) [ 172.191861][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 172.192221][ 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) [ 172.192484][ 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) [ 172.192795][ T11] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 172.193047][ T11] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 172.193375][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 172.193628][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 172.193975][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 172.194402][ T11] process_one_work (kernel/workqueue.c:2633) [ 172.194807][ 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) [ 172.195158][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 172.195557][ T11] ? assign_work (kernel/workqueue.c:1101) [ 172.195928][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 172.196330][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 172.196745][ T11] kthread (kernel/kthread.c:388) [ 172.197080][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 172.197464][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 172.197806][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 172.198185][ T11] ret_from_fork_asm (arch/x86/entry/entry_64.S:250) | # │ vxlan │ 4 │ 4 │ inherit 0x5c │ inherit 142 │ true │ OK │ | # │ vxlan │ 4 │ 4 │ fixed 0x78 │ fixed 222 │ false │ OK │ | [ 181.047031][ T11] general protection fault, probably for non-canonical address 0xed6d696d6d6d6d6d: 0000 [#1] PREEMPT SMP KASAN NOPTI | [ 181.047913][ T11] KASAN: maybe wild-memory-access in range [0x6b6b6b6b6b6b6b68-0x6b6b6b6b6b6b6b6f] [ 181.049220][ T11] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 181.050048][ T11] Workqueue: netns cleanup_net [ 181.050380][ T11] RIP: 0010:vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 181.050860][ 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 [ 181.052210][ T11] RSP: 0018:ffffc900000bf980 EFLAGS: 00010202 [ 181.052598][ T11] RAX: 0d6d6d6d6d6d6d6d RBX: 6b6b6b6b6b6b6b3b RCX: dffffc0000000000 [ 181.053146][ T11] RDX: 6b6b6b6b6b6b6b6b RSI: 0000000000000004 RDI: ffff8880093e8c44 [ 181.053701][ T11] RBP: 1ffff92000017f33 R08: 1ffff1100120e21a R09: ffffc900000bf9b8 [ 181.054244][ T11] R10: ffffffff89d51397 R11: ffff888009071000 R12: ffffed100120e21a [ 181.054806][ T11] R13: ffff8880093e8bc0 R14: ffff888006b81000 R15: ffff888009071000 [ 181.055329][ T11] FS: 0000000000000000(0000) GS:ffff888035600000(0000) knlGS:0000000000000000 [ 181.055895][ T11] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 181.056325][ T11] CR2: 00007f7328fa30e0 CR3: 00000000080a2001 CR4: 0000000000770ef0 [ 181.056830][ T11] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 181.057333][ T11] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 181.057836][ T11] PKRU: 55555554 [ 181.058065][ T11] Call Trace: [ 181.058280][ T11] [ 181.058471][ T11] ? die_addr (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:460) [ 181.058744][ T11] ? exc_general_protection (arch/x86/kernel/traps.c:701 arch/x86/kernel/traps.c:643) [ 181.059106][ T11] ? asm_exc_general_protection (./arch/x86/include/asm/idtentry.h:564) [ 181.059479][ T11] ? vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4613 drivers/net/vxlan/vxlan_core.c:4636) vxlan [ 181.059892][ T11] ? __pfx_vxlan_netdevice_event (drivers/net/vxlan/vxlan_core.c:4631) vxlan [ 181.060362][ T11] ? netconsole_netdev_event (drivers/net/netconsole.c:991) [ 181.060757][ T11] ? addrconf_notify (net/ipv6/addrconf.c:3771) [ 181.061096][ T11] notifier_call_chain (kernel/notifier.c:93) [ 181.061457][ T11] unregister_netdevice_many_notify (net/core/dev.c:11095) [ 181.061903][ 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) [ 181.062237][ T11] ? __pfx_unregister_netdevice_many_notify (net/core/dev.c:11035) [ 181.062697][ T11] ? __pfx_unregister_netdevice_queue (net/core/dev.c:11019) [ 181.063120][ T11] ? __wake_up (kernel/sched/wait.c:110 kernel/sched/wait.c:127) [ 181.063429][ T11] default_device_exit_batch (net/core/dev.c:11629) [ 181.063814][ T11] ? __pfx_default_device_exit_batch (net/core/dev.c:11604) [ 181.064253][ 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) [ 181.064568][ 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) [ 181.064992][ T11] cleanup_net (net/core/net_namespace.c:636 (discriminator 3)) [ 181.065292][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 181.065613][ T11] ? __pfx_cleanup_net (net/core/net_namespace.c:581) [ 181.065951][ T11] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 181.066288][ T11] ? process_one_work (kernel/workqueue.c:2609) [ 181.066642][ T11] process_one_work (kernel/workqueue.c:2633) [ 181.066994][ 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) [ 181.067318][ T11] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 181.067685][ T11] ? assign_work (kernel/workqueue.c:1101) [ 181.067993][ T11] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 181.068331][ T11] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 181.068684][ T11] kthread (kernel/kthread.c:388) [ 181.068955][ T11] ? __pfx_kthread (kernel/kthread.c:341) [ 181.069280][ T11] ret_from_fork (arch/x86/kernel/process.c:147) [ 181.069594][ 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