[ 11.330684][ T284] veth0: renamed from veth-rt-1 [ 12.149076][ T293] veth0: renamed from veth-rt-2 [ 13.600006][ T311] ip (311) used greatest stack depth: 24224 bytes left [ 50.697329][ T67] ================================================================== [ 50.697542][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 50.697726][ T67] Read of size 8 at addr ffff88800a6400f8 by task kworker/u16:1/67 [ 50.697908][ T67] [ 50.697972][ T67] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 50.698157][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 50.698313][ T67] Workqueue: netns cleanup_net [ 50.698441][ T67] Call Trace: [ 50.698535][ T67] [ 50.698601][ T67] dump_stack_lvl+0x82/0xd0 [ 50.698727][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 50.698883][ T67] ? cleanup_net+0xa5d/0xb90 [ 50.699003][ T67] print_report+0xb4/0x270 [ 50.699125][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 50.699246][ T67] kasan_report+0xbd/0xf0 [ 50.699341][ T67] ? cleanup_net+0xa5d/0xb90 [ 50.699467][ T67] cleanup_net+0xa5d/0xb90 [ 50.699595][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 50.699720][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 50.699840][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 50.699966][ T67] ? lock_acquire+0x32/0xc0 [ 50.700086][ T67] ? process_one_work+0xe0b/0x16d0 [ 50.700210][ T67] process_one_work+0xe55/0x16d0 [ 50.700335][ T67] ? __pfx___lock_release+0x10/0x10 [ 50.700456][ T67] ? __pfx_process_one_work+0x10/0x10 [ 50.700583][ T67] ? assign_work+0x16c/0x240 [ 50.700705][ T67] worker_thread+0x58c/0xce0 [ 50.700827][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 50.700980][ T67] ? __pfx_worker_thread+0x10/0x10 [ 50.701103][ T67] ? __pfx_worker_thread+0x10/0x10 [ 50.701226][ T67] kthread+0x28a/0x350 [ 50.701319][ T67] ? __pfx_kthread+0x10/0x10 [ 50.701439][ T67] ret_from_fork+0x31/0x70 [ 50.701559][ T67] ? __pfx_kthread+0x10/0x10 [ 50.701681][ T67] ret_from_fork_asm+0x1a/0x30 [ 50.701810][ T67] [ 50.701903][ T67] [ 50.701966][ T67] Allocated by task 268: [ 50.702058][ T67] kasan_save_stack+0x24/0x50 [ 50.702183][ T67] kasan_save_track+0x14/0x30 [ 50.702305][ T67] __kasan_slab_alloc+0x59/0x70 [ 50.702427][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 50.702554][ T67] copy_net_ns+0xc6/0x540 [ 50.702647][ T67] create_new_namespaces+0x35f/0x920 [ 50.702771][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 50.702892][ T67] ksys_unshare+0x2c4/0x6e0 [ 50.703015][ T67] __x64_sys_unshare+0x31/0x40 [ 50.703137][ T67] do_syscall_64+0xc1/0x1d0 [ 50.703261][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.703413][ T67] [ 50.703476][ T67] Freed by task 67: [ 50.703567][ T67] kasan_save_stack+0x24/0x50 [ 50.703690][ T67] kasan_save_track+0x14/0x30 [ 50.703812][ T67] kasan_save_free_info+0x3b/0x60 [ 50.703935][ T67] __kasan_slab_free+0x38/0x50 [ 50.704057][ T67] kmem_cache_free+0xf8/0x330 [ 50.704179][ T67] cleanup_net+0x5a8/0xb90 [ 50.704300][ T67] process_one_work+0xe55/0x16d0 [ 50.704425][ T67] worker_thread+0x58c/0xce0 [ 50.704554][ T67] kthread+0x28a/0x350 [ 50.704663][ T67] ret_from_fork+0x31/0x70 [ 50.704783][ T67] ret_from_fork_asm+0x1a/0x30 [ 50.704904][ T67] [ 50.704966][ T67] Last potentially related work creation: [ 50.705088][ T67] kasan_save_stack+0x24/0x50 [ 50.705212][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 50.705334][ T67] insert_work+0x34/0x230 [ 50.705428][ T67] __queue_work+0x5fd/0xa40 [ 50.705549][ T67] queue_delayed_work_on+0x8c/0xa0 [ 50.705674][ T67] __inet_insert_ifa+0x751/0xb10 [ 50.705799][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 50.705926][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 50.706048][ T67] netlink_rcv_skb+0x130/0x360 [ 50.706172][ T67] netlink_unicast+0x44b/0x710 [ 50.706295][ T67] netlink_sendmsg+0x723/0xbe0 [ 50.706417][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 50.706542][ T67] ___sys_sendmsg+0xee/0x170 [ 50.706668][ T67] __sys_sendmsg+0x109/0x1a0 [ 50.706790][ T67] do_syscall_64+0xc1/0x1d0 [ 50.706912][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.707065][ T67] [ 50.707131][ T67] Second to last potentially related work creation: [ 50.707280][ T67] kasan_save_stack+0x24/0x50 [ 50.707406][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 50.707531][ T67] insert_work+0x34/0x230 [ 50.707628][ T67] __queue_work+0x5fd/0xa40 [ 50.707751][ T67] queue_delayed_work_on+0x8c/0xa0 [ 50.707873][ T67] __inet_insert_ifa+0x751/0xb10 [ 50.707995][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 50.708125][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 50.708251][ T67] netlink_rcv_skb+0x130/0x360 [ 50.708372][ T67] netlink_unicast+0x44b/0x710 [ 50.708495][ T67] netlink_sendmsg+0x723/0xbe0 [ 50.708620][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 50.708743][ T67] ___sys_sendmsg+0xee/0x170 [ 50.708866][ T67] __sys_sendmsg+0x109/0x1a0 [ 50.708987][ T67] do_syscall_64+0xc1/0x1d0 [ 50.709117][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 50.709269][ T67] [ 50.709333][ T67] The buggy address belongs to the object at ffff88800a640040 [ 50.709333][ T67] which belongs to the cache net_namespace of size 6528 [ 50.709656][ T67] The buggy address is located 184 bytes inside of [ 50.709656][ T67] freed 6528-byte region [ffff88800a640040, ffff88800a6419c0) [ 50.709944][ T67] [ 50.710012][ T67] The buggy address belongs to the physical page: [ 50.710162][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa640 [ 50.710374][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 50.710562][ T67] flags: 0x80000000000040(head|node=0|zone=1) [ 50.710716][ T67] page_type: f5(slab) [ 50.710814][ T67] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 50.711035][ T67] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 50.711259][ T67] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 50.711473][ T67] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 50.711686][ T67] head: 0080000000000003 ffffea0000299001 ffffffffffffffff 0000000000000000 [ 50.711905][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 50.712119][ T67] page dumped because: kasan: bad access detected [ 50.712267][ T67] [ 50.712328][ T67] Memory state around the buggy address: [ 50.712447][ T67] ffff88800a63ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.712628][ T67] ffff88800a640000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 50.712801][ T67] >ffff88800a640080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.712974][ T67] ^ [ 50.713148][ T67] ffff88800a640100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.713323][ T67] ffff88800a640180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.713500][ T67] ================================================================== [ 50.713693][ T67] Disabling lock debugging due to kernel taint