[ 21.918881][ T66] ================================================================== [ 21.919127][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 21.919320][ T66] Read of size 8 at addr ffff88800a2580f8 by task kworker/u16:1/66 [ 21.919506][ T66] [ 21.919575][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 21.919788][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 21.919957][ T66] Workqueue: netns cleanup_net [ 21.920117][ T66] Call Trace: [ 21.920216][ T66] [ 21.920288][ T66] dump_stack_lvl+0x82/0xd0 [ 21.920443][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 21.920613][ T66] ? cleanup_net+0x932/0xa40 [ 21.920757][ T66] print_report+0xb4/0x270 [ 21.920927][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 21.921071][ T66] kasan_report+0xbd/0xf0 [ 21.921181][ T66] ? cleanup_net+0x932/0xa40 [ 21.921326][ T66] cleanup_net+0x932/0xa40 [ 21.921471][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 21.921623][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 21.921780][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 21.921923][ T66] ? lock_acquire+0x32/0xc0 [ 21.922073][ T66] ? process_one_work+0xe0b/0x16d0 [ 21.922223][ T66] process_one_work+0xe55/0x16d0 [ 21.922370][ T66] ? __pfx___lock_release+0x10/0x10 [ 21.922513][ T66] ? __pfx_process_one_work+0x10/0x10 [ 21.922663][ T66] ? assign_work+0x16c/0x240 [ 21.922829][ T66] worker_thread+0x58c/0xce0 [ 21.922976][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 21.923158][ T66] ? __pfx_worker_thread+0x10/0x10 [ 21.923320][ T66] ? __pfx_worker_thread+0x10/0x10 [ 21.923460][ T66] kthread+0x28a/0x350 [ 21.923568][ T66] ? __pfx_kthread+0x10/0x10 [ 21.923711][ T66] ret_from_fork+0x31/0x70 [ 21.923855][ T66] ? __pfx_kthread+0x10/0x10 [ 21.924010][ T66] ret_from_fork_asm+0x1a/0x30 [ 21.924170][ T66] [ 21.924287][ T66] [ 21.924362][ T66] Allocated by task 224: [ 21.924468][ T66] kasan_save_stack+0x24/0x50 [ 21.924620][ T66] kasan_save_track+0x14/0x30 [ 21.924751][ T66] __kasan_slab_alloc+0x59/0x70 [ 21.924904][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 21.925036][ T66] copy_net_ns+0xc6/0x340 [ 21.925139][ T66] create_new_namespaces+0x35f/0x920 [ 21.925270][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 21.925400][ T66] ksys_unshare+0x2a9/0x660 [ 21.925539][ T66] __x64_sys_unshare+0x31/0x40 [ 21.925666][ T66] do_syscall_64+0xc1/0x1d0 [ 21.925797][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 21.925958][ T66] [ 21.926024][ T66] Freed by task 66: [ 21.926123][ T66] kasan_save_stack+0x24/0x50 [ 21.926253][ T66] kasan_save_track+0x14/0x30 [ 21.926378][ T66] kasan_save_free_info+0x3b/0x60 [ 21.926509][ T66] __kasan_slab_free+0x38/0x50 [ 21.926641][ T66] kmem_cache_free+0xf8/0x330 [ 21.926779][ T66] cleanup_net+0x5a8/0xa40 [ 21.926909][ T66] process_one_work+0xe55/0x16d0 [ 21.927040][ T66] worker_thread+0x58c/0xce0 [ 21.927184][ T66] kthread+0x28a/0x350 [ 21.927289][ T66] ret_from_fork+0x31/0x70 [ 21.927423][ T66] ret_from_fork_asm+0x1a/0x30 [ 21.927561][ T66] [ 21.927627][ T66] Last potentially related work creation: [ 21.927762][ T66] kasan_save_stack+0x24/0x50 [ 21.927892][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 21.928025][ T66] insert_work+0x34/0x230 [ 21.928127][ T66] __queue_work+0x5fd/0xa40 [ 21.928259][ T66] queue_delayed_work_on+0x8c/0xa0 [ 21.928388][ T66] __inet_insert_ifa+0x751/0xb10 [ 21.928526][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 21.928653][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 21.928783][ T66] netlink_rcv_skb+0x130/0x360 [ 21.928915][ T66] netlink_unicast+0x44b/0x710 [ 21.929045][ T66] netlink_sendmsg+0x723/0xbe0 [ 21.929172][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 21.929306][ T66] ___sys_sendmsg+0xee/0x170 [ 21.929438][ T66] __sys_sendmsg+0x109/0x1a0 [ 21.929574][ T66] do_syscall_64+0xc1/0x1d0 [ 21.929719][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 21.929915][ T66] [ 21.929984][ T66] The buggy address belongs to the object at ffff88800a258040 [ 21.929984][ T66] which belongs to the cache net_namespace of size 5696 [ 21.930322][ T66] The buggy address is located 184 bytes inside of [ 21.930322][ T66] freed 5696-byte region [ffff88800a258040, ffff88800a259680) [ 21.930629][ T66] [ 21.930695][ T66] The buggy address belongs to the physical page: [ 21.930848][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a25afc0 pfn:0xa258 [ 21.931103][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 21.931296][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 21.931465][ T66] page_type: f5(slab) [ 21.931568][ T66] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 21.931805][ T66] raw: ffff88800a25afc0 0000000000050002 00000001f5000000 0000000000000000 [ 21.932031][ T66] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 21.932341][ T66] head: ffff88800a25afc0 0000000000050002 00000001f5000000 0000000000000000 [ 21.932580][ T66] head: 0080000000000003 ffffea0000289601 ffffffffffffffff 0000000000000000 [ 21.932878][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 21.933109][ T66] page dumped because: kasan: bad access detected [ 21.933272][ T66] [ 21.933393][ T66] Memory state around the buggy address: [ 21.933524][ T66] ffff88800a257f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 21.933715][ T66] ffff88800a258000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 21.933990][ T66] >ffff88800a258080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.934179][ T66] ^ [ 21.934385][ T66] ffff88800a258100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.934627][ T66] ffff88800a258180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 21.934817][ T66] ================================================================== [ 21.935037][ T66] Disabling lock debugging due to kernel taint