[ 10.269185][ T262] ip (262) used greatest stack depth: 23568 bytes left [ 10.977062][ T282] veth0: renamed from veth-rt-1 [ 11.875944][ T291] veth0: renamed from veth-rt-2 [ 82.521820][ T11] ================================================================== [ 82.522144][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 82.522445][ T11] Read of size 8 at addr ffff88800a5b80f8 by task kworker/u16:0/11 [ 82.522733][ T11] [ 82.522839][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 82.523144][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 82.523399][ T11] Workqueue: netns cleanup_net [ 82.523613][ T11] Call Trace: [ 82.523760][ T11] [ 82.523863][ T11] dump_stack_lvl+0x82/0xd0 [ 82.524065][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 82.524309][ T11] ? cleanup_net+0xa5d/0xb90 [ 82.524509][ T11] print_report+0xb4/0x270 [ 82.524712][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 82.524911][ T11] kasan_report+0xbd/0xf0 [ 82.525061][ T11] ? cleanup_net+0xa5d/0xb90 [ 82.525261][ T11] cleanup_net+0xa5d/0xb90 [ 82.525455][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 82.525654][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 82.525849][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 82.525993][ T11] ? lock_acquire+0x32/0xc0 [ 82.526139][ T11] ? process_one_work+0xe0b/0x16d0 [ 82.526294][ T11] process_one_work+0xe55/0x16d0 [ 82.526440][ T11] ? __pfx___lock_release+0x10/0x10 [ 82.526586][ T11] ? __pfx_process_one_work+0x10/0x10 [ 82.526741][ T11] ? assign_work+0x16c/0x240 [ 82.526893][ T11] worker_thread+0x58c/0xce0 [ 82.527040][ T11] ? __pfx_worker_thread+0x10/0x10 [ 82.527185][ T11] kthread+0x28a/0x350 [ 82.527295][ T11] ? __pfx_kthread+0x10/0x10 [ 82.527441][ T11] ret_from_fork+0x31/0x70 [ 82.527585][ T11] ? __pfx_kthread+0x10/0x10 [ 82.527782][ T11] ret_from_fork_asm+0x1a/0x30 [ 82.528007][ T11] [ 82.528166][ T11] [ 82.528278][ T11] Allocated by task 267: [ 82.528432][ T11] kasan_save_stack+0x24/0x50 [ 82.528579][ T11] kasan_save_track+0x14/0x30 [ 82.528727][ T11] __kasan_slab_alloc+0x59/0x70 [ 82.528865][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 82.529005][ T11] copy_net_ns+0xc6/0x540 [ 82.529106][ T11] create_new_namespaces+0x35f/0x920 [ 82.529243][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 82.529382][ T11] ksys_unshare+0x2c4/0x6e0 [ 82.529521][ T11] __x64_sys_unshare+0x31/0x40 [ 82.529662][ T11] do_syscall_64+0xc1/0x1d0 [ 82.529796][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.529973][ T11] [ 82.530043][ T11] Freed by task 11: [ 82.530147][ T11] kasan_save_stack+0x24/0x50 [ 82.530284][ T11] kasan_save_track+0x14/0x30 [ 82.530418][ T11] kasan_save_free_info+0x3b/0x60 [ 82.530556][ T11] __kasan_slab_free+0x38/0x50 [ 82.530697][ T11] kmem_cache_free+0xf8/0x330 [ 82.530833][ T11] cleanup_net+0x5a8/0xb90 [ 82.530967][ T11] process_one_work+0xe55/0x16d0 [ 82.531100][ T11] worker_thread+0x58c/0xce0 [ 82.531238][ T11] kthread+0x28a/0x350 [ 82.531342][ T11] ret_from_fork+0x31/0x70 [ 82.531477][ T11] ret_from_fork_asm+0x1a/0x30 [ 82.531622][ T11] [ 82.531700][ T11] Last potentially related work creation: [ 82.531833][ T11] kasan_save_stack+0x24/0x50 [ 82.531970][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 82.532111][ T11] insert_work+0x34/0x230 [ 82.532217][ T11] __queue_work+0x5fd/0xa40 [ 82.532355][ T11] queue_delayed_work_on+0x8c/0xa0 [ 82.532490][ T11] __inet_insert_ifa+0x751/0xb10 [ 82.532634][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 82.532837][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 82.532994][ T11] netlink_rcv_skb+0x130/0x360 [ 82.533134][ T11] netlink_unicast+0x44b/0x710 [ 82.533274][ T11] netlink_sendmsg+0x723/0xbe0 [ 82.533413][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 82.533549][ T11] ___sys_sendmsg+0xee/0x170 [ 82.533694][ T11] __sys_sendmsg+0x109/0x1a0 [ 82.533832][ T11] do_syscall_64+0xc1/0x1d0 [ 82.533968][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.534136][ T11] [ 82.534207][ T11] Second to last potentially related work creation: [ 82.534373][ T11] kasan_save_stack+0x24/0x50 [ 82.534508][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 82.534648][ T11] insert_work+0x34/0x230 [ 82.534749][ T11] __queue_work+0x5fd/0xa40 [ 82.534886][ T11] queue_delayed_work_on+0x8c/0xa0 [ 82.535025][ T11] __inet_insert_ifa+0x751/0xb10 [ 82.535163][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 82.535301][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 82.535441][ T11] netlink_rcv_skb+0x130/0x360 [ 82.535578][ T11] netlink_unicast+0x44b/0x710 [ 82.535728][ T11] netlink_sendmsg+0x723/0xbe0 [ 82.535865][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 82.536003][ T11] ___sys_sendmsg+0xee/0x170 [ 82.536146][ T11] __sys_sendmsg+0x109/0x1a0 [ 82.536282][ T11] do_syscall_64+0xc1/0x1d0 [ 82.536417][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 82.536588][ T11] [ 82.536666][ T11] The buggy address belongs to the object at ffff88800a5b8040 [ 82.536666][ T11] which belongs to the cache net_namespace of size 6528 [ 82.537022][ T11] The buggy address is located 184 bytes inside of [ 82.537022][ T11] freed 6528-byte region [ffff88800a5b8040, ffff88800a5b99c0) [ 82.537354][ T11] [ 82.537428][ T11] The buggy address belongs to the physical page: [ 82.537595][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa5b8 [ 82.537849][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 82.538062][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 82.538238][ T11] page_type: f5(slab) [ 82.538346][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 82.538598][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 82.538869][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 82.539111][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 82.539416][ T11] head: 0080000000000003 ffffea0000296e01 ffffffffffffffff 0000000000000000 [ 82.539766][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 82.540104][ T11] page dumped because: kasan: bad access detected [ 82.540345][ T11] [ 82.540443][ T11] Memory state around the buggy address: [ 82.540630][ T11] ffff88800a5b7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 82.540920][ T11] ffff88800a5b8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 82.541208][ T11] >ffff88800a5b8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.541500][ T11] ^ [ 82.541769][ T11] ffff88800a5b8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.542030][ T11] ffff88800a5b8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 82.542314][ T11] ================================================================== [ 82.542687][ T11] Disabling lock debugging due to kernel taint