[ 80.426416][ T381] ip (381) used greatest stack depth: 24064 bytes left [ 84.476313][ T11] ================================================================== [ 84.476556][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 84.476762][ T11] Read of size 8 at addr ffff888009ad80f8 by task kworker/u16:0/11 [ 84.476957][ T11] [ 84.477027][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 84.477234][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 84.477425][ T11] Workqueue: netns cleanup_net [ 84.477580][ T11] Call Trace: [ 84.477685][ T11] [ 84.477757][ T11] dump_stack_lvl+0x82/0xd0 [ 84.477890][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 84.478060][ T11] ? cleanup_net+0xa5d/0xb90 [ 84.478197][ T11] print_report+0xb4/0x270 [ 84.478334][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 84.478472][ T11] kasan_report+0xbd/0xf0 [ 84.478577][ T11] ? cleanup_net+0xa5d/0xb90 [ 84.478713][ T11] cleanup_net+0xa5d/0xb90 [ 84.478855][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 84.478993][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 84.479127][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 84.479266][ T11] ? lock_acquire+0x32/0xc0 [ 84.479398][ T11] ? process_one_work+0xe0b/0x16d0 [ 84.479536][ T11] process_one_work+0xe55/0x16d0 [ 84.479670][ T11] ? __pfx___lock_release+0x10/0x10 [ 84.479803][ T11] ? __pfx_process_one_work+0x10/0x10 [ 84.479943][ T11] ? assign_work+0x16c/0x240 [ 84.480078][ T11] worker_thread+0x58c/0xce0 [ 84.480223][ T11] ? __pfx_worker_thread+0x10/0x10 [ 84.480357][ T11] kthread+0x28a/0x350 [ 84.480462][ T11] ? __pfx_kthread+0x10/0x10 [ 84.480599][ T11] ret_from_fork+0x31/0x70 [ 84.480737][ T11] ? __pfx_kthread+0x10/0x10 [ 84.480872][ T11] ret_from_fork_asm+0x1a/0x30 [ 84.481011][ T11] [ 84.481110][ T11] [ 84.481185][ T11] Allocated by task 252: [ 84.481294][ T11] kasan_save_stack+0x24/0x50 [ 84.481435][ T11] kasan_save_track+0x14/0x30 [ 84.481568][ T11] __kasan_slab_alloc+0x59/0x70 [ 84.481694][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 84.481825][ T11] copy_net_ns+0xc6/0x540 [ 84.481926][ T11] create_new_namespaces+0x35f/0x920 [ 84.482067][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 84.482201][ T11] ksys_unshare+0x2c4/0x6e0 [ 84.482347][ T11] __x64_sys_unshare+0x31/0x40 [ 84.482483][ T11] do_syscall_64+0xc1/0x1d0 [ 84.482618][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.482787][ T11] [ 84.482858][ T11] Freed by task 11: [ 84.482964][ T11] kasan_save_stack+0x24/0x50 [ 84.483100][ T11] kasan_save_track+0x14/0x30 [ 84.483237][ T11] kasan_save_free_info+0x3b/0x60 [ 84.483379][ T11] __kasan_slab_free+0x38/0x50 [ 84.483513][ T11] kmem_cache_free+0xf8/0x330 [ 84.483648][ T11] cleanup_net+0x5a8/0xb90 [ 84.483781][ T11] process_one_work+0xe55/0x16d0 [ 84.483917][ T11] worker_thread+0x58c/0xce0 [ 84.484049][ T11] kthread+0x28a/0x350 [ 84.484151][ T11] ret_from_fork+0x31/0x70 [ 84.484285][ T11] ret_from_fork_asm+0x1a/0x30 [ 84.484416][ T11] [ 84.484484][ T11] Last potentially related work creation: [ 84.484620][ T11] kasan_save_stack+0x24/0x50 [ 84.484756][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 84.484894][ T11] insert_work+0x34/0x230 [ 84.484998][ T11] __queue_work+0x5fd/0xa40 [ 84.485132][ T11] queue_delayed_work_on+0x8c/0xa0 [ 84.485269][ T11] __inet_insert_ifa+0x751/0xb10 [ 84.485410][ T11] inetdev_event+0xb18/0xcf0 [ 84.485545][ T11] notifier_call_chain+0xcd/0x150 [ 84.485684][ T11] __dev_notify_flags+0xe6/0x250 [ 84.485816][ T11] dev_change_flags+0xec/0x160 [ 84.485949][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 84.486081][ T11] rtnl_newlink+0x6de/0xa80 [ 84.486214][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 84.486351][ T11] netlink_rcv_skb+0x130/0x360 [ 84.486486][ T11] netlink_unicast+0x44b/0x710 [ 84.486623][ T11] netlink_sendmsg+0x723/0xbe0 [ 84.486758][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 84.486893][ T11] ___sys_sendmsg+0xee/0x170 [ 84.487027][ T11] __sys_sendmsg+0x109/0x1a0 [ 84.487167][ T11] do_syscall_64+0xc1/0x1d0 [ 84.487309][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 84.487477][ T11] [ 84.487545][ T11] The buggy address belongs to the object at ffff888009ad8040 [ 84.487545][ T11] which belongs to the cache net_namespace of size 6528 [ 84.487903][ T11] The buggy address is located 184 bytes inside of [ 84.487903][ T11] freed 6528-byte region [ffff888009ad8040, ffff888009ad99c0) [ 84.488220][ T11] [ 84.488284][ T11] The buggy address belongs to the physical page: [ 84.488449][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009add140 pfn:0x9ad8 [ 84.488719][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 84.488935][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 84.489105][ T11] page_type: f5(slab) [ 84.489210][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 84.489461][ T11] raw: ffff888009add140 0000000000040003 00000001f5000000 0000000000000000 [ 84.489693][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 84.489932][ T11] head: ffff888009add140 0000000000040003 00000001f5000000 0000000000000000 [ 84.490165][ T11] head: 0080000000000003 ffffea000026b601 ffffffffffffffff 0000000000000000 [ 84.490398][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 84.490638][ T11] page dumped because: kasan: bad access detected [ 84.490803][ T11] [ 84.490869][ T11] Memory state around the buggy address: [ 84.491001][ T11] ffff888009ad7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 84.491199][ T11] ffff888009ad8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 84.491397][ T11] >ffff888009ad8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.491592][ T11] ^ [ 84.491781][ T11] ffff888009ad8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.491968][ T11] ffff888009ad8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 84.492163][ T11] ================================================================== [ 84.492383][ T11] Disabling lock debugging due to kernel taint