[ 13.831346][ T11] ================================================================== [ 13.831563][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.831757][ T11] Read of size 8 at addr ffff88800add00f8 by task kworker/u16:0/11 [ 13.831935][ T11] [ 13.831999][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.832186][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.832339][ T11] Workqueue: netns cleanup_net [ 13.832470][ T11] Call Trace: [ 13.832565][ T11] [ 13.832630][ T11] dump_stack_lvl+0x82/0xd0 [ 13.832760][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.832909][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.833037][ T11] print_report+0xb4/0x270 [ 13.833162][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.833284][ T11] kasan_report+0xbd/0xf0 [ 13.833378][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.833506][ T11] cleanup_net+0xa5d/0xb90 [ 13.833629][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.833762][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.833890][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.834016][ T11] ? lock_acquire+0x32/0xc0 [ 13.834140][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.834266][ T11] process_one_work+0xe55/0x16d0 [ 13.834390][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.834514][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.834639][ T11] ? assign_work+0x16c/0x240 [ 13.834760][ T11] worker_thread+0x58c/0xce0 [ 13.834887][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.835014][ T11] kthread+0x28a/0x350 [ 13.835107][ T11] ? __pfx_kthread+0x10/0x10 [ 13.835231][ T11] ret_from_fork+0x31/0x70 [ 13.835354][ T11] ? __pfx_kthread+0x10/0x10 [ 13.835476][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.835609][ T11] [ 13.835702][ T11] [ 13.835764][ T11] Allocated by task 259: [ 13.835855][ T11] kasan_save_stack+0x24/0x50 [ 13.835980][ T11] kasan_save_track+0x14/0x30 [ 13.836099][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.836219][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.836343][ T11] copy_net_ns+0xc6/0x540 [ 13.836435][ T11] create_new_namespaces+0x35f/0x920 [ 13.836561][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.836682][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.836808][ T11] __x64_sys_unshare+0x31/0x40 [ 13.836934][ T11] do_syscall_64+0xc1/0x1d0 [ 13.837059][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.837214][ T11] [ 13.837278][ T11] Freed by task 11: [ 13.837370][ T11] kasan_save_stack+0x24/0x50 [ 13.837497][ T11] kasan_save_track+0x14/0x30 [ 13.837618][ T11] kasan_save_free_info+0x3b/0x60 [ 13.837742][ T11] __kasan_slab_free+0x38/0x50 [ 13.837864][ T11] kmem_cache_free+0xf8/0x330 [ 13.837986][ T11] cleanup_net+0x5a8/0xb90 [ 13.838110][ T11] process_one_work+0xe55/0x16d0 [ 13.838230][ T11] worker_thread+0x58c/0xce0 [ 13.838352][ T11] kthread+0x28a/0x350 [ 13.838446][ T11] ret_from_fork+0x31/0x70 [ 13.838565][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.838685][ T11] [ 13.838748][ T11] Last potentially related work creation: [ 13.838871][ T11] kasan_save_stack+0x24/0x50 [ 13.838995][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.839119][ T11] insert_work+0x34/0x230 [ 13.839213][ T11] __queue_work+0x5fd/0xa40 [ 13.839341][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.839466][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.839592][ T11] inetdev_event+0xb18/0xcf0 [ 13.839715][ T11] notifier_call_chain+0xcd/0x150 [ 13.839840][ T11] __dev_notify_flags+0xe6/0x250 [ 13.839967][ T11] dev_change_flags+0xec/0x160 [ 13.840088][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.840212][ T11] rtnl_newlink+0x6de/0xa80 [ 13.840335][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.840461][ T11] netlink_rcv_skb+0x130/0x360 [ 13.840590][ T11] netlink_unicast+0x44b/0x710 [ 13.840714][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.840839][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.840964][ T11] ___sys_sendmsg+0xee/0x170 [ 13.841087][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.841209][ T11] do_syscall_64+0xc1/0x1d0 [ 13.841331][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.841492][ T11] [ 13.841555][ T11] The buggy address belongs to the object at ffff88800add0040 [ 13.841555][ T11] which belongs to the cache net_namespace of size 6528 [ 13.841877][ T11] The buggy address is located 184 bytes inside of [ 13.841877][ T11] freed 6528-byte region [ffff88800add0040, ffff88800add19c0) [ 13.842166][ T11] [ 13.842229][ T11] The buggy address belongs to the physical page: [ 13.842380][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800add3640 pfn:0xadd0 [ 13.842626][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.842818][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.842983][ T11] page_type: f5(slab) [ 13.843083][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.843310][ T11] raw: ffff88800add3640 0000000000040002 00000001f5000000 0000000000000000 [ 13.843526][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.843744][ T11] head: ffff88800add3640 0000000000040002 00000001f5000000 0000000000000000 [ 13.843971][ T11] head: 0080000000000003 ffffea00002b7401 ffffffffffffffff 0000000000000000 [ 13.844185][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.844402][ T11] page dumped because: kasan: bad access detected [ 13.844553][ T11] [ 13.844614][ T11] Memory state around the buggy address: [ 13.844739][ T11] ffff88800adcff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.844913][ T11] ffff88800add0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.845088][ T11] >ffff88800add0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.845266][ T11] ^ [ 13.845444][ T11] ffff88800add0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.845618][ T11] ffff88800add0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.845796][ T11] ================================================================== [ 13.846086][ T11] Disabling lock debugging due to kernel taint