[ 11.666782][ T11] ================================================================== [ 11.667043][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.667257][ T11] Read of size 8 at addr ffff888004fa80f8 by task kworker/u16:0/11 [ 11.667462][ T11] [ 11.667537][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.667751][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.667927][ T11] Workqueue: netns cleanup_net [ 11.668077][ T11] Call Trace: [ 11.668182][ T11] [ 11.668254][ T11] dump_stack_lvl+0x82/0xd0 [ 11.668400][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.668578][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.668716][ T11] print_report+0xb4/0x270 [ 11.668856][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.668995][ T11] kasan_report+0xbd/0xf0 [ 11.669101][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.669246][ T11] cleanup_net+0xa5d/0xb90 [ 11.669388][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.669530][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.669663][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.669803][ T11] ? lock_acquire+0x32/0xc0 [ 11.669945][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.670091][ T11] process_one_work+0xe55/0x16d0 [ 11.670233][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.670375][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.670517][ T11] ? assign_work+0x16c/0x240 [ 11.670656][ T11] worker_thread+0x58c/0xce0 [ 11.670794][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.670933][ T11] kthread+0x28a/0x350 [ 11.671043][ T11] ? __pfx_kthread+0x10/0x10 [ 11.671186][ T11] ret_from_fork+0x31/0x70 [ 11.671325][ T11] ? __pfx_kthread+0x10/0x10 [ 11.671462][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.671605][ T11] [ 11.671709][ T11] [ 11.671780][ T11] Allocated by task 252: [ 11.671886][ T11] kasan_save_stack+0x24/0x50 [ 11.672027][ T11] kasan_save_track+0x14/0x30 [ 11.672163][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.672301][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.672443][ T11] copy_net_ns+0xc6/0x540 [ 11.672545][ T11] create_new_namespaces+0x35f/0x920 [ 11.672687][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.672828][ T11] ksys_unshare+0x2c4/0x6e0 [ 11.672971][ T11] __x64_sys_unshare+0x31/0x40 [ 11.673106][ T11] do_syscall_64+0xc1/0x1d0 [ 11.673249][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.673429][ T11] [ 11.673504][ T11] Freed by task 11: [ 11.673607][ T11] kasan_save_stack+0x24/0x50 [ 11.673747][ T11] kasan_save_track+0x14/0x30 [ 11.673884][ T11] kasan_save_free_info+0x3b/0x60 [ 11.674025][ T11] __kasan_slab_free+0x38/0x50 [ 11.674159][ T11] kmem_cache_free+0xf8/0x330 [ 11.674296][ T11] cleanup_net+0x5a8/0xb90 [ 11.674431][ T11] process_one_work+0xe55/0x16d0 [ 11.674571][ T11] worker_thread+0x58c/0xce0 [ 11.674704][ T11] kthread+0x28a/0x350 [ 11.674810][ T11] ret_from_fork+0x31/0x70 [ 11.674943][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.675080][ T11] [ 11.675156][ T11] Last potentially related work creation: [ 11.675293][ T11] kasan_save_stack+0x24/0x50 [ 11.675432][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.675569][ T11] insert_work+0x34/0x230 [ 11.675674][ T11] __queue_work+0x5fd/0xa40 [ 11.675816][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.675953][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.676091][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 11.676235][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.676375][ T11] netlink_rcv_skb+0x130/0x360 [ 11.676524][ T11] netlink_unicast+0x44b/0x710 [ 11.676661][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.676797][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.676946][ T11] ___sys_sendmsg+0xee/0x170 [ 11.677087][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.677225][ T11] do_syscall_64+0xc1/0x1d0 [ 11.677363][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.677532][ T11] [ 11.677603][ T11] Second to last potentially related work creation: [ 11.677773][ T11] kasan_save_stack+0x24/0x50 [ 11.677916][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.678055][ T11] insert_work+0x34/0x230 [ 11.678163][ T11] __queue_work+0x5fd/0xa40 [ 11.678299][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.678444][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.678582][ T11] inetdev_event+0xb18/0xcf0 [ 11.678719][ T11] notifier_call_chain+0xcd/0x150 [ 11.678860][ T11] __dev_notify_flags+0xe6/0x250 [ 11.678999][ T11] dev_change_flags+0xec/0x160 [ 11.679137][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 11.679278][ T11] rtnl_newlink+0x6de/0xa80 [ 11.679417][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.679556][ T11] netlink_rcv_skb+0x130/0x360 [ 11.679700][ T11] netlink_unicast+0x44b/0x710 [ 11.679834][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.679972][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.680113][ T11] ___sys_sendmsg+0xee/0x170 [ 11.680257][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.680396][ T11] do_syscall_64+0xc1/0x1d0 [ 11.680535][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.680714][ T11] [ 11.680783][ T11] The buggy address belongs to the object at ffff888004fa8040 [ 11.680783][ T11] which belongs to the cache net_namespace of size 6528 [ 11.681160][ T11] The buggy address is located 184 bytes inside of [ 11.681160][ T11] freed 6528-byte region [ffff888004fa8040, ffff888004fa99c0) [ 11.681492][ T11] [ 11.681563][ T11] The buggy address belongs to the physical page: [ 11.681737][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004fab640 pfn:0x4fa8 [ 11.682013][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.682229][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.682402][ T11] page_type: f5(slab) [ 11.682517][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.682766][ T11] raw: ffff888004fab640 0000000000040002 00000001f5000000 0000000000000000 [ 11.683010][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.683254][ T11] head: ffff888004fab640 0000000000040002 00000001f5000000 0000000000000000 [ 11.683493][ T11] head: 0080000000000003 ffffea000013ea01 ffffffffffffffff 0000000000000000 [ 11.683734][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.683979][ T11] page dumped because: kasan: bad access detected [ 11.684172][ T11] [ 11.684243][ T11] Memory state around the buggy address: [ 11.684379][ T11] ffff888004fa7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.684583][ T11] ffff888004fa8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.684787][ T11] >ffff888004fa8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.684992][ T11] ^ [ 11.685191][ T11] ffff888004fa8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.685387][ T11] ffff888004fa8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.685587][ T11] ================================================================== [ 11.685809][ T11] Disabling lock debugging due to kernel taint [ 23.592467][ C3] IPv4: Oversized IP packet from 172.17.0.2