[ 30.939149][ T11] ================================================================== [ 30.939447][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 30.939637][ T11] Read of size 8 at addr ffff88800cba80f8 by task kworker/u16:0/11 [ 30.939825][ T11] [ 30.939893][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 30.940097][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.940257][ T11] Workqueue: netns cleanup_net [ 30.940392][ T11] Call Trace: [ 30.940492][ T11] [ 30.940560][ T11] dump_stack_lvl+0x82/0xd0 [ 30.940695][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 30.940867][ T11] ? cleanup_net+0xa5d/0xb90 [ 30.940998][ T11] print_report+0xb4/0x270 [ 30.941125][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 30.941259][ T11] kasan_report+0xbd/0xf0 [ 30.941359][ T11] ? cleanup_net+0xa5d/0xb90 [ 30.941489][ T11] cleanup_net+0xa5d/0xb90 [ 30.941619][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.941752][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 30.941882][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 30.942010][ T11] ? lock_acquire+0x32/0xc0 [ 30.942136][ T11] ? process_one_work+0xe0b/0x16d0 [ 30.942266][ T11] process_one_work+0xe55/0x16d0 [ 30.942395][ T11] ? __pfx___lock_release+0x10/0x10 [ 30.942526][ T11] ? __pfx_process_one_work+0x10/0x10 [ 30.942656][ T11] ? assign_work+0x16c/0x240 [ 30.942783][ T11] worker_thread+0x58c/0xce0 [ 30.942913][ T11] ? __pfx_worker_thread+0x10/0x10 [ 30.943040][ T11] kthread+0x28a/0x350 [ 30.943138][ T11] ? __pfx_kthread+0x10/0x10 [ 30.943266][ T11] ret_from_fork+0x31/0x70 [ 30.943398][ T11] ? __pfx_kthread+0x10/0x10 [ 30.943525][ T11] ret_from_fork_asm+0x1a/0x30 [ 30.943654][ T11] [ 30.943748][ T11] [ 30.943815][ T11] Allocated by task 333: [ 30.943914][ T11] kasan_save_stack+0x24/0x50 [ 30.944041][ T11] kasan_save_track+0x14/0x30 [ 30.944162][ T11] __kasan_slab_alloc+0x59/0x70 [ 30.944286][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 30.944416][ T11] copy_net_ns+0xc6/0x540 [ 30.944509][ T11] create_new_namespaces+0x35f/0x920 [ 30.944636][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 30.944761][ T11] ksys_unshare+0x2c4/0x6e0 [ 30.944893][ T11] __x64_sys_unshare+0x31/0x40 [ 30.945017][ T11] do_syscall_64+0xc1/0x1d0 [ 30.945142][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.945299][ T11] [ 30.945364][ T11] Freed by task 11: [ 30.945459][ T11] kasan_save_stack+0x24/0x50 [ 30.945585][ T11] kasan_save_track+0x14/0x30 [ 30.945706][ T11] kasan_save_free_info+0x3b/0x60 [ 30.945832][ T11] __kasan_slab_free+0x38/0x50 [ 30.945954][ T11] kmem_cache_free+0xf8/0x330 [ 30.946080][ T11] cleanup_net+0x5a8/0xb90 [ 30.946203][ T11] process_one_work+0xe55/0x16d0 [ 30.946326][ T11] worker_thread+0x58c/0xce0 [ 30.946455][ T11] kthread+0x28a/0x350 [ 30.946551][ T11] ret_from_fork+0x31/0x70 [ 30.946671][ T11] ret_from_fork_asm+0x1a/0x30 [ 30.946793][ T11] [ 30.946861][ T11] Last potentially related work creation: [ 30.946984][ T11] kasan_save_stack+0x24/0x50 [ 30.947109][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 30.947233][ T11] insert_work+0x34/0x230 [ 30.947327][ T11] __queue_work+0x5fd/0xa40 [ 30.947452][ T11] queue_delayed_work_on+0x8c/0xa0 [ 30.947576][ T11] __inet_insert_ifa+0x751/0xb10 [ 30.947704][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 30.947830][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 30.947955][ T11] netlink_rcv_skb+0x130/0x360 [ 30.948083][ T11] netlink_unicast+0x44b/0x710 [ 30.948208][ T11] netlink_sendmsg+0x723/0xbe0 [ 30.948334][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 30.948461][ T11] ___sys_sendmsg+0xee/0x170 [ 30.948586][ T11] __sys_sendmsg+0x109/0x1a0 [ 30.948715][ T11] do_syscall_64+0xc1/0x1d0 [ 30.948841][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.948994][ T11] [ 30.949060][ T11] Second to last potentially related work creation: [ 30.949216][ T11] kasan_save_stack+0x24/0x50 [ 30.949345][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 30.949470][ T11] insert_work+0x34/0x230 [ 30.949563][ T11] __queue_work+0x5fd/0xa40 [ 30.949687][ T11] queue_delayed_work_on+0x8c/0xa0 [ 30.949818][ T11] __inet_insert_ifa+0x751/0xb10 [ 30.949949][ T11] inetdev_event+0xb18/0xcf0 [ 30.950088][ T11] notifier_call_chain+0xcd/0x150 [ 30.950214][ T11] __dev_notify_flags+0xe6/0x250 [ 30.950339][ T11] dev_change_flags+0xec/0x160 [ 30.950460][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 30.950583][ T11] rtnl_newlink+0x6de/0xa80 [ 30.950704][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 30.950828][ T11] netlink_rcv_skb+0x130/0x360 [ 30.950951][ T11] netlink_unicast+0x44b/0x710 [ 30.951076][ T11] netlink_sendmsg+0x723/0xbe0 [ 30.951197][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 30.951319][ T11] ___sys_sendmsg+0xee/0x170 [ 30.951441][ T11] __sys_sendmsg+0x109/0x1a0 [ 30.951564][ T11] do_syscall_64+0xc1/0x1d0 [ 30.951687][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.951839][ T11] [ 30.951903][ T11] The buggy address belongs to the object at ffff88800cba8040 [ 30.951903][ T11] which belongs to the cache net_namespace of size 6528 [ 30.952224][ T11] The buggy address is located 184 bytes inside of [ 30.952224][ T11] freed 6528-byte region [ffff88800cba8040, ffff88800cba99c0) [ 30.952519][ T11] [ 30.952582][ T11] The buggy address belongs to the physical page: [ 30.952730][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cbad140 pfn:0xcba8 [ 30.952981][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 30.953167][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 30.953331][ T11] page_type: f5(slab) [ 30.953429][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 30.953650][ T11] raw: ffff88800cbad140 0000000000040003 00000001f5000000 0000000000000000 [ 30.953871][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 30.954085][ T11] head: ffff88800cbad140 0000000000040003 00000001f5000000 0000000000000000 [ 30.954299][ T11] head: 0080000000000003 ffffea000032ea01 ffffffffffffffff 0000000000000000 [ 30.954512][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 30.954726][ T11] page dumped because: kasan: bad access detected [ 30.954878][ T11] [ 30.954947][ T11] Memory state around the buggy address: [ 30.955063][ T11] ffff88800cba7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.955241][ T11] ffff88800cba8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.955417][ T11] >ffff88800cba8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.955598][ T11] ^ [ 30.955776][ T11] ffff88800cba8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.955950][ T11] ffff88800cba8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.956123][ T11] ================================================================== [ 30.956338][ T11] Disabling lock debugging due to kernel taint