[ 10.905056][ T271] ip (271) used greatest stack depth: 23768 bytes left [ 11.325735][ T283] veth0: renamed from veth-rt-1 [ 12.225061][ T292] veth0: renamed from veth-rt-2 [ 13.977338][ T311] ip (311) used greatest stack depth: 23456 bytes left [ 83.348463][ T11] ================================================================== [ 83.348721][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 83.348939][ T11] Read of size 8 at addr ffff8880094400f8 by task kworker/u16:0/11 [ 83.349136][ T11] [ 83.349207][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 83.349414][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 83.349583][ T11] Workqueue: netns cleanup_net [ 83.349729][ T11] Call Trace: [ 83.349831][ T11] [ 83.349903][ T11] dump_stack_lvl+0x82/0xd0 [ 83.350043][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 83.350219][ T11] ? cleanup_net+0xa5d/0xb90 [ 83.350359][ T11] print_report+0xb4/0x270 [ 83.350495][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 83.350631][ T11] kasan_report+0xbd/0xf0 [ 83.350741][ T11] ? cleanup_net+0xa5d/0xb90 [ 83.350879][ T11] cleanup_net+0xa5d/0xb90 [ 83.351030][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 83.351172][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 83.351308][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 83.351458][ T11] ? lock_acquire+0x32/0xc0 [ 83.351591][ T11] ? process_one_work+0xe0b/0x16d0 [ 83.351729][ T11] process_one_work+0xe55/0x16d0 [ 83.351868][ T11] ? __pfx___lock_release+0x10/0x10 [ 83.352003][ T11] ? __pfx_process_one_work+0x10/0x10 [ 83.352138][ T11] ? assign_work+0x16c/0x240 [ 83.352274][ T11] worker_thread+0x58c/0xce0 [ 83.352412][ T11] ? __pfx_worker_thread+0x10/0x10 [ 83.352550][ T11] kthread+0x28a/0x350 [ 83.352653][ T11] ? __pfx_kthread+0x10/0x10 [ 83.352790][ T11] ret_from_fork+0x31/0x70 [ 83.352933][ T11] ? __pfx_kthread+0x10/0x10 [ 83.353069][ T11] ret_from_fork_asm+0x1a/0x30 [ 83.353213][ T11] [ 83.353317][ T11] [ 83.353386][ T11] Allocated by task 269: [ 83.353489][ T11] kasan_save_stack+0x24/0x50 [ 83.353625][ T11] kasan_save_track+0x14/0x30 [ 83.353756][ T11] __kasan_slab_alloc+0x59/0x70 [ 83.353892][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 83.354030][ T11] copy_net_ns+0xc6/0x540 [ 83.354132][ T11] create_new_namespaces+0x35f/0x920 [ 83.354267][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 83.354400][ T11] ksys_unshare+0x2c4/0x6e0 [ 83.354536][ T11] __x64_sys_unshare+0x31/0x40 [ 83.354668][ T11] do_syscall_64+0xc1/0x1d0 [ 83.354804][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.354974][ T11] [ 83.355043][ T11] Freed by task 11: [ 83.355142][ T11] kasan_save_stack+0x24/0x50 [ 83.355278][ T11] kasan_save_track+0x14/0x30 [ 83.355417][ T11] kasan_save_free_info+0x3b/0x60 [ 83.355555][ T11] __kasan_slab_free+0x38/0x50 [ 83.355701][ T11] kmem_cache_free+0xf8/0x330 [ 83.355836][ T11] cleanup_net+0x5a8/0xb90 [ 83.355973][ T11] process_one_work+0xe55/0x16d0 [ 83.356113][ T11] worker_thread+0x58c/0xce0 [ 83.356248][ T11] kthread+0x28a/0x350 [ 83.356353][ T11] ret_from_fork+0x31/0x70 [ 83.356493][ T11] ret_from_fork_asm+0x1a/0x30 [ 83.356631][ T11] [ 83.356702][ T11] Last potentially related work creation: [ 83.356841][ T11] kasan_save_stack+0x24/0x50 [ 83.356992][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 83.357139][ T11] insert_work+0x34/0x230 [ 83.357264][ T11] __queue_work+0x5fd/0xa40 [ 83.357404][ T11] queue_delayed_work_on+0x8c/0xa0 [ 83.357541][ T11] __inet_insert_ifa+0x751/0xb10 [ 83.357681][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 83.357821][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 83.357966][ T11] netlink_rcv_skb+0x130/0x360 [ 83.358109][ T11] netlink_unicast+0x44b/0x710 [ 83.358249][ T11] netlink_sendmsg+0x723/0xbe0 [ 83.358400][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 83.358536][ T11] ___sys_sendmsg+0xee/0x170 [ 83.358675][ T11] __sys_sendmsg+0x109/0x1a0 [ 83.358812][ T11] do_syscall_64+0xc1/0x1d0 [ 83.358965][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.359136][ T11] [ 83.359208][ T11] Second to last potentially related work creation: [ 83.359378][ T11] kasan_save_stack+0x24/0x50 [ 83.359517][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 83.359655][ T11] insert_work+0x34/0x230 [ 83.359762][ T11] __queue_work+0x5fd/0xa40 [ 83.359900][ T11] queue_delayed_work_on+0x8c/0xa0 [ 83.360039][ T11] __inet_insert_ifa+0x751/0xb10 [ 83.360185][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 83.360321][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 83.360459][ T11] netlink_rcv_skb+0x130/0x360 [ 83.360600][ T11] netlink_unicast+0x44b/0x710 [ 83.360740][ T11] netlink_sendmsg+0x723/0xbe0 [ 83.360876][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 83.361012][ T11] ___sys_sendmsg+0xee/0x170 [ 83.361149][ T11] __sys_sendmsg+0x109/0x1a0 [ 83.361285][ T11] do_syscall_64+0xc1/0x1d0 [ 83.361419][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 83.361595][ T11] [ 83.361665][ T11] The buggy address belongs to the object at ffff888009440040 [ 83.361665][ T11] which belongs to the cache net_namespace of size 6528 [ 83.362022][ T11] The buggy address is located 184 bytes inside of [ 83.362022][ T11] freed 6528-byte region [ffff888009440040, ffff8880094419c0) [ 83.362353][ T11] [ 83.362427][ T11] The buggy address belongs to the physical page: [ 83.362592][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9440 [ 83.362835][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 83.363037][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 83.363212][ T11] page_type: f5(slab) [ 83.363325][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 83.363567][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 83.363806][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 83.364049][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 83.364287][ T11] head: 0080000000000003 ffffea0000251001 ffffffffffffffff 0000000000000000 [ 83.364528][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 83.364763][ T11] page dumped because: kasan: bad access detected [ 83.364932][ T11] [ 83.365002][ T11] Memory state around the buggy address: [ 83.365137][ T11] ffff88800943ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 83.365335][ T11] ffff888009440000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 83.365528][ T11] >ffff888009440080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.365725][ T11] ^ [ 83.365920][ T11] ffff888009440100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.366117][ T11] ffff888009440180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 83.366310][ T11] ================================================================== [ 83.366530][ T11] Disabling lock debugging due to kernel taint