[ 11.104710][ T66] ================================================================== [ 11.104992][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.105178][ T66] Read of size 8 at addr ffff888004f580f8 by task kworker/u16:1/66 [ 11.105358][ T66] [ 11.105425][ T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.105612][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.105769][ T66] Workqueue: netns cleanup_net [ 11.105897][ T66] Call Trace: [ 11.105990][ T66] [ 11.106058][ T66] dump_stack_lvl+0x82/0xd0 [ 11.106186][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 11.106342][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.106472][ T66] print_report+0xb4/0x270 [ 11.106595][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 11.106718][ T66] kasan_report+0xbd/0xf0 [ 11.106813][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.106936][ T66] cleanup_net+0xa5d/0xb90 [ 11.107060][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.107188][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 11.107310][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 11.107435][ T66] ? lock_acquire+0x32/0xc0 [ 11.107583][ T66] ? process_one_work+0xe0b/0x16d0 [ 11.107711][ T66] process_one_work+0xe55/0x16d0 [ 11.107837][ T66] ? __pfx___lock_release+0x10/0x10 [ 11.107960][ T66] ? __pfx_process_one_work+0x10/0x10 [ 11.108085][ T66] ? assign_work+0x16c/0x240 [ 11.108209][ T66] worker_thread+0x58c/0xce0 [ 11.108334][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.108487][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.108608][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.108731][ T66] kthread+0x28a/0x350 [ 11.108828][ T66] ? __pfx_kthread+0x10/0x10 [ 11.108952][ T66] ret_from_fork+0x31/0x70 [ 11.109084][ T66] ? __pfx_kthread+0x10/0x10 [ 11.109210][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.109338][ T66] [ 11.109430][ T66] [ 11.109494][ T66] Allocated by task 251: [ 11.109590][ T66] kasan_save_stack+0x24/0x50 [ 11.109717][ T66] kasan_save_track+0x14/0x30 [ 11.109840][ T66] __kasan_slab_alloc+0x59/0x70 [ 11.109967][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.110092][ T66] copy_net_ns+0xc6/0x540 [ 11.110187][ T66] create_new_namespaces+0x35f/0x920 [ 11.110315][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.110446][ T66] ksys_unshare+0x2c4/0x6e0 [ 11.110571][ T66] __x64_sys_unshare+0x31/0x40 [ 11.110695][ T66] do_syscall_64+0xc1/0x1d0 [ 11.110822][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.110977][ T66] [ 11.111040][ T66] Freed by task 66: [ 11.111133][ T66] kasan_save_stack+0x24/0x50 [ 11.111259][ T66] kasan_save_track+0x14/0x30 [ 11.111384][ T66] kasan_save_free_info+0x3b/0x60 [ 11.111537][ T66] __kasan_slab_free+0x38/0x50 [ 11.111662][ T66] kmem_cache_free+0xf8/0x330 [ 11.111791][ T66] cleanup_net+0x5a8/0xb90 [ 11.111919][ T66] process_one_work+0xe55/0x16d0 [ 11.112045][ T66] worker_thread+0x58c/0xce0 [ 11.112168][ T66] kthread+0x28a/0x350 [ 11.112265][ T66] ret_from_fork+0x31/0x70 [ 11.112392][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.112516][ T66] [ 11.112579][ T66] Last potentially related work creation: [ 11.112700][ T66] kasan_save_stack+0x24/0x50 [ 11.112825][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.112951][ T66] insert_work+0x34/0x230 [ 11.113045][ T66] __queue_work+0x5fd/0xa40 [ 11.113208][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.113399][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.113585][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 11.113747][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.113875][ T66] netlink_rcv_skb+0x130/0x360 [ 11.114004][ T66] netlink_unicast+0x44b/0x710 [ 11.114131][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.114255][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.114382][ T66] ___sys_sendmsg+0xee/0x170 [ 11.114515][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.114642][ T66] do_syscall_64+0xc1/0x1d0 [ 11.114767][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.114923][ T66] [ 11.114988][ T66] Second to last potentially related work creation: [ 11.115140][ T66] kasan_save_stack+0x24/0x50 [ 11.115267][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.115392][ T66] insert_work+0x34/0x230 [ 11.115487][ T66] __queue_work+0x5fd/0xa40 [ 11.115613][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.115744][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.115871][ T66] inetdev_event+0xb18/0xcf0 [ 11.116004][ T66] notifier_call_chain+0xcd/0x150 [ 11.116128][ T66] __dev_notify_flags+0xe6/0x250 [ 11.116252][ T66] dev_change_flags+0xec/0x160 [ 11.116380][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 11.116535][ T66] rtnl_newlink+0x6de/0xa80 [ 11.116662][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.116785][ T66] netlink_rcv_skb+0x130/0x360 [ 11.116909][ T66] netlink_unicast+0x44b/0x710 [ 11.117034][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.117159][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.117283][ T66] ___sys_sendmsg+0xee/0x170 [ 11.117408][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.117534][ T66] do_syscall_64+0xc1/0x1d0 [ 11.117657][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.117809][ T66] [ 11.117873][ T66] The buggy address belongs to the object at ffff888004f58040 [ 11.117873][ T66] which belongs to the cache net_namespace of size 6528 [ 11.118202][ T66] The buggy address is located 184 bytes inside of [ 11.118202][ T66] freed 6528-byte region [ffff888004f58040, ffff888004f599c0) [ 11.118499][ T66] [ 11.118566][ T66] The buggy address belongs to the physical page: [ 11.118723][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004f5b640 pfn:0x4f58 [ 11.118973][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.119184][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.119342][ T66] page_type: f5(slab) [ 11.119440][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.119663][ T66] raw: ffff888004f5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.119880][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.120109][ T66] head: ffff888004f5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.120324][ T66] head: 0080000000000003 ffffea000013d601 ffffffffffffffff 0000000000000000 [ 11.120540][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.120755][ T66] page dumped because: kasan: bad access detected [ 11.120904][ T66] [ 11.120966][ T66] Memory state around the buggy address: [ 11.121092][ T66] ffff888004f57f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.121271][ T66] ffff888004f58000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.121452][ T66] >ffff888004f58080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.121651][ T66] ^ [ 11.121832][ T66] ffff888004f58100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.122007][ T66] ffff888004f58180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.122183][ T66] ================================================================== [ 11.122453][ T66] Disabling lock debugging due to kernel taint