[ 12.664238][ T293] bond0: (slave veth0): Enslaving as a backup interface with a down link [ 12.751857][ T294] bond0: (slave veth1): Enslaving as a backup interface with a down link [ 12.835284][ T295] br0: port 1(veth0) entered blocking state [ 12.835570][ T295] br0: port 1(veth0) entered disabled state [ 12.835857][ T295] veth0: entered allmulticast mode [ 12.837120][ T295] veth0: entered promiscuous mode [ 12.915021][ T296] br0: port 2(veth1) entered blocking state [ 12.915290][ T296] br0: port 2(veth1) entered disabled state [ 12.915525][ T296] veth1: entered allmulticast mode [ 12.916696][ T296] veth1: entered promiscuous mode [ 13.405756][ T153] br0: port 1(veth0) entered blocking state [ 13.406206][ T153] br0: port 1(veth0) entered forwarding state [ 13.407678][ T153] br0: port 2(veth1) entered blocking state [ 13.407881][ T153] br0: port 2(veth1) entered forwarding state [ 14.653762][ T67] bond0: (slave veth1): link status definitely up [ 14.654100][ T67] bond0: (slave veth1): making interface the new active one [ 14.655115][ T67] bond0: active interface up! [ 15.067536][ T329] veth1: left allmulticast mode [ 15.067837][ T329] veth1: left promiscuous mode [ 15.068188][ T329] br0: port 2(veth1) entered disabled state [ 15.070394][ T329] veth0: left allmulticast mode [ 15.070570][ T329] veth0: left promiscuous mode [ 15.070835][ T329] br0: port 1(veth0) entered disabled state [ 15.264780][ T329] bond0: (slave veth1): Releasing backup interface [ 15.460615][ T329] bond0: (slave veth0): Releasing backup interface [ 15.804379][ T329] bond0 (unregistering): Released all slaves [ 15.854925][ T329] ================================================================== [ 15.855164][ T329] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 15.855381][ T329] Read of size 8 at addr ffff8880079780f8 by task kworker/u16:2/329 [ 15.855594][ T329] [ 15.855679][ T329] CPU: 3 UID: 0 PID: 329 Comm: kworker/u16:2 Not tainted 6.12.0-virtme #1 [ 15.855892][ T329] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.856080][ T329] Workqueue: netns cleanup_net [ 15.856229][ T329] Call Trace: [ 15.856330][ T329] [ 15.856406][ T329] dump_stack_lvl+0x82/0xd0 [ 15.856582][ T329] print_address_description.constprop.0+0x2c/0x3b0 [ 15.856774][ T329] ? cleanup_net+0x932/0xa40 [ 15.856909][ T329] print_report+0xb4/0x270 [ 15.857045][ T329] ? kasan_addr_to_slab+0x25/0x80 [ 15.857192][ T329] kasan_report+0xbd/0xf0 [ 15.857303][ T329] ? cleanup_net+0x932/0xa40 [ 15.857441][ T329] cleanup_net+0x932/0xa40 [ 15.857618][ T329] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.857760][ T329] ? __pfx_cleanup_net+0x10/0x10 [ 15.857893][ T329] ? trace_lock_acquire+0x148/0x1f0 [ 15.858033][ T329] ? lock_acquire+0x32/0xc0 [ 15.858162][ T329] ? process_one_work+0xe0b/0x16d0 [ 15.858298][ T329] process_one_work+0xe55/0x16d0 [ 15.858434][ T329] ? __pfx___lock_release+0x10/0x10 [ 15.858568][ T329] ? __pfx_process_one_work+0x10/0x10 [ 15.858696][ T329] ? assign_work+0x16c/0x240 [ 15.858856][ T329] worker_thread+0x58c/0xce0 [ 15.859008][ T329] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 15.859182][ T329] ? __pfx_worker_thread+0x10/0x10 [ 15.859330][ T329] ? __pfx_worker_thread+0x10/0x10 [ 15.859474][ T329] kthread+0x28a/0x350 [ 15.859594][ T329] ? __pfx_kthread+0x10/0x10 [ 15.859728][ T329] ret_from_fork+0x31/0x70 [ 15.859875][ T329] ? __pfx_kthread+0x10/0x10 [ 15.860032][ T329] ret_from_fork_asm+0x1a/0x30 [ 15.860183][ T329] [ 15.860333][ T329] [ 15.860407][ T329] Allocated by task 243: [ 15.860536][ T329] kasan_save_stack+0x24/0x50 [ 15.860706][ T329] kasan_save_track+0x14/0x30 [ 15.860873][ T329] __kasan_slab_alloc+0x59/0x70 [ 15.861039][ T329] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.861190][ T329] copy_net_ns+0xc6/0x340 [ 15.861301][ T329] create_new_namespaces+0x35f/0x920 [ 15.861433][ T329] unshare_nsproxy_namespaces+0x8d/0x130 [ 15.861582][ T329] ksys_unshare+0x2a9/0x660 [ 15.861734][ T329] __x64_sys_unshare+0x31/0x40 [ 15.861867][ T329] do_syscall_64+0xc1/0x1d0 [ 15.861995][ T329] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.862157][ T329] [ 15.862227][ T329] Freed by task 329: [ 15.862323][ T329] kasan_save_stack+0x24/0x50 [ 15.862471][ T329] kasan_save_track+0x14/0x30 [ 15.862602][ T329] kasan_save_free_info+0x3b/0x60 [ 15.862731][ T329] __kasan_slab_free+0x38/0x50 [ 15.862861][ T329] kmem_cache_free+0xf8/0x330 [ 15.862985][ T329] cleanup_net+0x5a8/0xa40 [ 15.863112][ T329] process_one_work+0xe55/0x16d0 [ 15.863239][ T329] worker_thread+0x58c/0xce0 [ 15.863368][ T329] kthread+0x28a/0x350 [ 15.863467][ T329] ret_from_fork+0x31/0x70 [ 15.863593][ T329] ret_from_fork_asm+0x1a/0x30 [ 15.863723][ T329] [ 15.863790][ T329] The buggy address belongs to the object at ffff888007978040 [ 15.863790][ T329] which belongs to the cache net_namespace of size 5696 [ 15.864128][ T329] The buggy address is located 184 bytes inside of [ 15.864128][ T329] freed 5696-byte region [ffff888007978040, ffff888007979680) [ 15.864436][ T329] [ 15.864501][ T329] The buggy address belongs to the physical page: [ 15.864677][ T329] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800797afc0 pfn:0x7978 [ 15.864944][ T329] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.865143][ T329] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.865320][ T329] page_type: f5(slab) [ 15.865435][ T329] raw: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 15.865676][ T329] raw: ffff88800797afc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.865933][ T329] head: 0080000000000240 ffff888001965240 ffff88800196a088 ffff88800196a088 [ 15.866169][ T329] head: ffff88800797afc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.866409][ T329] head: 0080000000000003 ffffea00001e5e01 ffffffffffffffff 0000000000000000 [ 15.866653][ T329] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.866906][ T329] page dumped because: kasan: bad access detected [ 15.867066][ T329] [ 15.867137][ T329] Memory state around the buggy address: [ 15.867261][ T329] ffff888007977f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.867447][ T329] ffff888007978000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.867630][ T329] >ffff888007978080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.867836][ T329] ^ [ 15.868027][ T329] ffff888007978100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.868281][ T329] ffff888007978180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.868497][ T329] ================================================================== [ 15.868768][ T329] Disabling lock debugging due to kernel taint