[ 22.082999][ T534] Mirror/redirect action on [ 26.302465][ T67] ================================================================== [ 26.302690][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 26.302874][ T67] Read of size 8 at addr ffff88800aa980f8 by task kworker/u16:1/67 [ 26.303052][ T67] [ 26.303124][ T67] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 26.303310][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.303462][ T67] Workqueue: netns cleanup_net [ 26.303592][ T67] Call Trace: [ 26.303685][ T67] [ 26.303750][ T67] dump_stack_lvl+0x82/0xd0 [ 26.303878][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 26.304036][ T67] ? cleanup_net+0xa5d/0xb90 [ 26.304159][ T67] print_report+0xb4/0x270 [ 26.304281][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 26.304403][ T67] kasan_report+0xbd/0xf0 [ 26.304500][ T67] ? cleanup_net+0xa5d/0xb90 [ 26.304626][ T67] cleanup_net+0xa5d/0xb90 [ 26.304747][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 26.304876][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 26.304998][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 26.305123][ T67] ? lock_acquire+0x32/0xc0 [ 26.305245][ T67] ? process_one_work+0xe0b/0x16d0 [ 26.305370][ T67] process_one_work+0xe55/0x16d0 [ 26.305495][ T67] ? __pfx___lock_release+0x10/0x10 [ 26.305618][ T67] ? __pfx_process_one_work+0x10/0x10 [ 26.305744][ T67] ? assign_work+0x16c/0x240 [ 26.305870][ T67] worker_thread+0x58c/0xce0 [ 26.305995][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 26.306146][ T67] ? __pfx_worker_thread+0x10/0x10 [ 26.306271][ T67] ? __pfx_worker_thread+0x10/0x10 [ 26.306393][ T67] kthread+0x28a/0x350 [ 26.306489][ T67] ? __pfx_kthread+0x10/0x10 [ 26.306611][ T67] ret_from_fork+0x31/0x70 [ 26.306733][ T67] ? __pfx_kthread+0x10/0x10 [ 26.306856][ T67] ret_from_fork_asm+0x1a/0x30 [ 26.306985][ T67] [ 26.307077][ T67] [ 26.307139][ T67] Allocated by task 269: [ 26.307233][ T67] kasan_save_stack+0x24/0x50 [ 26.307357][ T67] kasan_save_track+0x14/0x30 [ 26.307481][ T67] __kasan_slab_alloc+0x59/0x70 [ 26.307600][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 26.307722][ T67] copy_net_ns+0xc6/0x540 [ 26.307814][ T67] create_new_namespaces+0x35f/0x920 [ 26.307940][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 26.308063][ T67] ksys_unshare+0x2c4/0x6e0 [ 26.308188][ T67] __x64_sys_unshare+0x31/0x40 [ 26.308307][ T67] do_syscall_64+0xc1/0x1d0 [ 26.308430][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.308581][ T67] [ 26.308644][ T67] Freed by task 67: [ 26.308737][ T67] kasan_save_stack+0x24/0x50 [ 26.308858][ T67] kasan_save_track+0x14/0x30 [ 26.308979][ T67] kasan_save_free_info+0x3b/0x60 [ 26.309100][ T67] __kasan_slab_free+0x38/0x50 [ 26.309219][ T67] kmem_cache_free+0xf8/0x330 [ 26.309341][ T67] cleanup_net+0x5a8/0xb90 [ 26.309462][ T67] process_one_work+0xe55/0x16d0 [ 26.309582][ T67] worker_thread+0x58c/0xce0 [ 26.309701][ T67] kthread+0x28a/0x350 [ 26.309795][ T67] ret_from_fork+0x31/0x70 [ 26.309915][ T67] ret_from_fork_asm+0x1a/0x30 [ 26.310037][ T67] [ 26.310099][ T67] Last potentially related work creation: [ 26.310218][ T67] kasan_save_stack+0x24/0x50 [ 26.310364][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 26.310491][ T67] insert_work+0x34/0x230 [ 26.310586][ T67] __queue_work+0x5fd/0xa40 [ 26.310709][ T67] queue_delayed_work_on+0x8c/0xa0 [ 26.310835][ T67] __inet_insert_ifa+0x751/0xb10 [ 26.310959][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 26.311081][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 26.311206][ T67] netlink_rcv_skb+0x130/0x360 [ 26.311331][ T67] netlink_unicast+0x44b/0x710 [ 26.311454][ T67] netlink_sendmsg+0x723/0xbe0 [ 26.311577][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 26.311703][ T67] ___sys_sendmsg+0xee/0x170 [ 26.311830][ T67] __sys_sendmsg+0x109/0x1a0 [ 26.311954][ T67] do_syscall_64+0xc1/0x1d0 [ 26.312076][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.312232][ T67] [ 26.312297][ T67] Second to last potentially related work creation: [ 26.312445][ T67] kasan_save_stack+0x24/0x50 [ 26.312572][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 26.312697][ T67] insert_work+0x34/0x230 [ 26.312796][ T67] __queue_work+0x5fd/0xa40 [ 26.312917][ T67] queue_delayed_work_on+0x8c/0xa0 [ 26.313039][ T67] __inet_insert_ifa+0x751/0xb10 [ 26.313162][ T67] inetdev_event+0xb18/0xcf0 [ 26.313287][ T67] notifier_call_chain+0xcd/0x150 [ 26.313412][ T67] __dev_notify_flags+0xe6/0x250 [ 26.313536][ T67] dev_change_flags+0xec/0x160 [ 26.313658][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 26.313782][ T67] rtnl_newlink+0x6de/0xa80 [ 26.313912][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 26.314036][ T67] netlink_rcv_skb+0x130/0x360 [ 26.314161][ T67] netlink_unicast+0x44b/0x710 [ 26.314288][ T67] netlink_sendmsg+0x723/0xbe0 [ 26.314411][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 26.314533][ T67] ___sys_sendmsg+0xee/0x170 [ 26.314659][ T67] __sys_sendmsg+0x109/0x1a0 [ 26.314783][ T67] do_syscall_64+0xc1/0x1d0 [ 26.314905][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.315066][ T67] [ 26.315130][ T67] The buggy address belongs to the object at ffff88800aa98040 [ 26.315130][ T67] which belongs to the cache net_namespace of size 6528 [ 26.315452][ T67] The buggy address is located 184 bytes inside of [ 26.315452][ T67] freed 6528-byte region [ffff88800aa98040, ffff88800aa999c0) [ 26.315746][ T67] [ 26.315809][ T67] The buggy address belongs to the physical page: [ 26.315959][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aa9b640 pfn:0xaa98 [ 26.316204][ T67] head: order:3 mapcount:0 entire_mapcount:0