[ 11.064417][ T283] veth0: renamed from veth-rt-1 [ 11.931032][ T292] veth0: renamed from veth-rt-2 [ 82.155061][ T67] ================================================================== [ 82.155316][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 82.155542][ T67] Read of size 8 at addr ffff8880026700f8 by task kworker/u16:1/67 [ 82.155742][ T67] [ 82.155815][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 82.156026][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 82.156209][ T67] Workqueue: netns cleanup_net [ 82.156357][ T67] Call Trace: [ 82.156478][ T67] [ 82.156558][ T67] dump_stack_lvl+0x82/0xd0 [ 82.156714][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 82.156898][ T67] ? cleanup_net+0xa5d/0xb90 [ 82.157048][ T67] print_report+0xb4/0x270 [ 82.157193][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 82.157343][ T67] kasan_report+0xbd/0xf0 [ 82.157453][ T67] ? cleanup_net+0xa5d/0xb90 [ 82.157599][ T67] cleanup_net+0xa5d/0xb90 [ 82.157742][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.157892][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 82.158038][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 82.158186][ T67] ? lock_acquire+0x32/0xc0 [ 82.158330][ T67] ? process_one_work+0xe0b/0x16d0 [ 82.158480][ T67] process_one_work+0xe55/0x16d0 [ 82.158624][ T67] ? __pfx___lock_release+0x10/0x10 [ 82.158768][ T67] ? __pfx_process_one_work+0x10/0x10 [ 82.158914][ T67] ? assign_work+0x16c/0x240 [ 82.159060][ T67] worker_thread+0x58c/0xce0 [ 82.159206][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 82.159385][ T67] ? __pfx_worker_thread+0x10/0x10 [ 82.159524][ T67] ? __pfx_worker_thread+0x10/0x10 [ 82.159668][ T67] kthread+0x28a/0x350 [ 82.159775][ T67] ? __pfx_kthread+0x10/0x10 [ 82.159913][ T67] ret_from_fork+0x31/0x70 [ 82.160054][ T67] ? __pfx_kthread+0x10/0x10 [ 82.160200][ T67] ret_from_fork_asm+0x1a/0x30 [ 82.160350][ T67] [ 82.160456][ T67] [ 82.160527][ T67] Allocated by task 269: [ 82.160631][ T67] kasan_save_stack+0x24/0x50 [ 82.160771][ T67] kasan_save_track+0x14/0x30 [ 82.160912][ T67] __kasan_slab_alloc+0x59/0x70 [ 82.161055][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 82.161198][ T67] copy_net_ns+0xc6/0x540 [ 82.161306][ T67] create_new_namespaces+0x35f/0x920 [ 82.161450][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 82.161593][ T67] ksys_unshare+0x2c4/0x6e0 [ 82.161737][ T67] __x64_sys_unshare+0x31/0x40 [ 82.161887][ T67] do_syscall_64+0xc1/0x1d0 [ 82.162029][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.162203][ T67] [ 82.162281][ T67] Freed by task 67: [ 82.162392][ T67] kasan_save_stack+0x24/0x50 [ 82.162530][ T67] kasan_save_track+0x14/0x30 [ 82.162666][ T67] kasan_save_free_info+0x3b/0x60 [ 82.162807][ T67] __kasan_slab_free+0x38/0x50 [ 82.162946][ T67] kmem_cache_free+0xf8/0x330 [ 82.163088][ T67] cleanup_net+0x5a8/0xb90 [ 82.163231][ T67] process_one_work+0xe55/0x16d0 [ 82.163373][ T67] worker_thread+0x58c/0xce0 [ 82.163514][ T67] kthread+0x28a/0x350 [ 82.163623][ T67] ret_from_fork+0x31/0x70 [ 82.163764][ T67] ret_from_fork_asm+0x1a/0x30 [ 82.163902][ T67] [ 82.163978][ T67] Last potentially related work creation: [ 82.164122][ T67] kasan_save_stack+0x24/0x50 [ 82.164261][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 82.164402][ T67] insert_work+0x34/0x230 [ 82.164507][ T67] __queue_work+0x5fd/0xa40 [ 82.164648][ T67] queue_delayed_work_on+0x8c/0xa0 [ 82.164794][ T67] __inet_insert_ifa+0x751/0xb10 [ 82.164951][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 82.165095][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 82.165246][ T67] netlink_rcv_skb+0x130/0x360 [ 82.165394][ T67] netlink_unicast+0x44b/0x710 [ 82.165539][ T67] netlink_sendmsg+0x723/0xbe0 [ 82.165682][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 82.165838][ T67] ___sys_sendmsg+0xee/0x170 [ 82.165981][ T67] __sys_sendmsg+0x109/0x1a0 [ 82.166121][ T67] do_syscall_64+0xc1/0x1d0 [ 82.166267][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.166444][ T67] [ 82.166520][ T67] Second to last potentially related work creation: [ 82.166701][ T67] kasan_save_stack+0x24/0x50 [ 82.166842][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 82.166987][ T67] insert_work+0x34/0x230 [ 82.167099][ T67] __queue_work+0x5fd/0xa40 [ 82.167242][ T67] queue_delayed_work_on+0x8c/0xa0 [ 82.167393][ T67] __inet_insert_ifa+0x751/0xb10 [ 82.167537][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 82.167681][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 82.167824][ T67] netlink_rcv_skb+0x130/0x360 [ 82.167966][ T67] netlink_unicast+0x44b/0x710 [ 82.168109][ T67] netlink_sendmsg+0x723/0xbe0 [ 82.168250][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 82.168386][ T67] ___sys_sendmsg+0xee/0x170 [ 82.168526][ T67] __sys_sendmsg+0x109/0x1a0 [ 82.168678][ T67] do_syscall_64+0xc1/0x1d0 [ 82.168822][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.168998][ T67] [ 82.169071][ T67] The buggy address belongs to the object at ffff888002670040 [ 82.169071][ T67] which belongs to the cache net_namespace of size 6528 [ 82.169451][ T67] The buggy address is located 184 bytes inside of [ 82.169451][ T67] freed 6528-byte region [ffff888002670040, ffff8880026719c0) [ 82.169796][ T67] [ 82.169869][ T67] The buggy address belongs to the physical page: [ 82.170040][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x2670 [ 82.170288][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 82.170499][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 82.170685][ T67] page_type: f5(slab) [ 82.170797][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 82.171053][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 82.171298][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 82.171549][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 82.171798][ T67] head: 0080000000000003 ffffea0000099c01 ffffffffffffffff 0000000000000000 [ 82.172042][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 82.172287][ T67] page dumped because: kasan: bad access detected [ 82.172462][ T67] [ 82.172538][ T67] Memory state around the buggy address: [ 82.172681][ T67] ffff88800266ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 82.172889][ T67] ffff888002670000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 82.173090][ T67] >ffff888002670080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.173293][ T67] ^ [ 82.173496][ T67] ffff888002670100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.173704][ T67] ffff888002670180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.173909][ T67] ================================================================== [ 82.174189][ T67] Disabling lock debugging due to kernel taint