[ 11.607709][ T66] ================================================================== [ 11.607921][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.608105][ T66] Read of size 8 at addr ffff88800cd59bf8 by task kworker/u16:1/66 [ 11.608288][ T66] [ 11.608352][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 11.608538][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.608690][ T66] Workqueue: netns cleanup_net [ 11.608818][ T66] Call Trace: [ 11.608911][ T66] [ 11.608976][ T66] dump_stack_lvl+0x82/0xd0 [ 11.609103][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 11.609259][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.609384][ T66] print_report+0xb4/0x270 [ 11.609505][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 11.609628][ T66] kasan_report+0xbd/0xf0 [ 11.609722][ T66] ? cleanup_net+0xa5d/0xb90 [ 11.609846][ T66] cleanup_net+0xa5d/0xb90 [ 11.609969][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.610095][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 11.610215][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 11.610346][ T66] ? lock_acquire+0x32/0xc0 [ 11.610470][ T66] ? process_one_work+0xe0b/0x16d0 [ 11.610592][ T66] process_one_work+0xe55/0x16d0 [ 11.610717][ T66] ? __pfx___lock_release+0x10/0x10 [ 11.610842][ T66] ? __pfx_process_one_work+0x10/0x10 [ 11.610968][ T66] ? assign_work+0x16c/0x240 [ 11.611094][ T66] worker_thread+0x58c/0xce0 [ 11.611219][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 11.611374][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.611496][ T66] ? __pfx_worker_thread+0x10/0x10 [ 11.611618][ T66] kthread+0x28a/0x350 [ 11.611715][ T66] ? __pfx_kthread+0x10/0x10 [ 11.611838][ T66] ret_from_fork+0x31/0x70 [ 11.611961][ T66] ? __pfx_kthread+0x10/0x10 [ 11.612084][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.612212][ T66] [ 11.612314][ T66] [ 11.612378][ T66] Allocated by task 257: [ 11.612479][ T66] kasan_save_stack+0x24/0x50 [ 11.612603][ T66] kasan_save_track+0x14/0x30 [ 11.612727][ T66] __kasan_slab_alloc+0x59/0x70 [ 11.612858][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.612983][ T66] copy_net_ns+0xc6/0x540 [ 11.613077][ T66] create_new_namespaces+0x35f/0x920 [ 11.613207][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.613333][ T66] ksys_unshare+0x2c4/0x6e0 [ 11.613458][ T66] __x64_sys_unshare+0x31/0x40 [ 11.613583][ T66] do_syscall_64+0xc1/0x1d0 [ 11.613710][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.613866][ T66] [ 11.613929][ T66] Freed by task 66: [ 11.614020][ T66] kasan_save_stack+0x24/0x50 [ 11.614143][ T66] kasan_save_track+0x14/0x30 [ 11.614267][ T66] kasan_save_free_info+0x3b/0x60 [ 11.614393][ T66] __kasan_slab_free+0x38/0x50 [ 11.614517][ T66] kmem_cache_free+0xf8/0x330 [ 11.614649][ T66] cleanup_net+0x5a8/0xb90 [ 11.614772][ T66] process_one_work+0xe55/0x16d0 [ 11.614898][ T66] worker_thread+0x58c/0xce0 [ 11.615019][ T66] kthread+0x28a/0x350 [ 11.615116][ T66] ret_from_fork+0x31/0x70 [ 11.615237][ T66] ret_from_fork_asm+0x1a/0x30 [ 11.615358][ T66] [ 11.615422][ T66] Last potentially related work creation: [ 11.615543][ T66] kasan_save_stack+0x24/0x50 [ 11.615671][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.615799][ T66] insert_work+0x34/0x230 [ 11.615894][ T66] __queue_work+0x5fd/0xa40 [ 11.616018][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.616142][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.616270][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 11.616395][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.616519][ T66] netlink_rcv_skb+0x130/0x360 [ 11.616643][ T66] netlink_unicast+0x44b/0x710 [ 11.616769][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.616892][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.617016][ T66] ___sys_sendmsg+0xee/0x170 [ 11.617142][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.617269][ T66] do_syscall_64+0xc1/0x1d0 [ 11.617396][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.617551][ T66] [ 11.617614][ T66] Second to last potentially related work creation: [ 11.617768][ T66] kasan_save_stack+0x24/0x50 [ 11.617892][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 11.618020][ T66] insert_work+0x34/0x230 [ 11.618112][ T66] __queue_work+0x5fd/0xa40 [ 11.618238][ T66] queue_delayed_work_on+0x8c/0xa0 [ 11.618362][ T66] __inet_insert_ifa+0x751/0xb10 [ 11.618487][ T66] inetdev_event+0xb18/0xcf0 [ 11.618613][ T66] notifier_call_chain+0xcd/0x150 [ 11.618739][ T66] __dev_notify_flags+0xe6/0x250 [ 11.618863][ T66] dev_change_flags+0xec/0x160 [ 11.618985][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 11.619109][ T66] rtnl_newlink+0x6de/0xa80 [ 11.619234][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 11.619357][ T66] netlink_rcv_skb+0x130/0x360 [ 11.619482][ T66] netlink_unicast+0x44b/0x710 [ 11.619605][ T66] netlink_sendmsg+0x723/0xbe0 [ 11.619733][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 11.619857][ T66] ___sys_sendmsg+0xee/0x170 [ 11.619980][ T66] __sys_sendmsg+0x109/0x1a0 [ 11.620102][ T66] do_syscall_64+0xc1/0x1d0 [ 11.620226][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.620379][ T66] [ 11.620443][ T66] The buggy address belongs to the object at ffff88800cd59b40 [ 11.620443][ T66] which belongs to the cache net_namespace of size 6528 [ 11.620768][ T66] The buggy address is located 184 bytes inside of [ 11.620768][ T66] freed 6528-byte region [ffff88800cd59b40, ffff88800cd5b4c0) [ 11.621061][ T66] [ 11.621124][ T66] The buggy address belongs to the physical page: [ 11.621272][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cd5b640 pfn:0xcd58 [ 11.621520][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.621707][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.621863][ T66] page_type: f5(slab) [ 11.621959][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.622182][ T66] raw: ffff88800cd5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.622399][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.622619][ T66] head: ffff88800cd5b640 0000000000040002 00000001f5000000 0000000000000000 [ 11.622838][ T66] head: 0080000000000003 ffffea0000335601 ffffffffffffffff 0000000000000000 [ 11.623062][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.623350][ T66] page dumped because: kasan: bad access detected [ 11.623503][ T66] [ 11.623565][ T66] Memory state around the buggy address: [ 11.623799][ T66] ffff88800cd59a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 11.623975][ T66] ffff88800cd59b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.624157][ T66] >ffff88800cd59b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.624333][ T66] ^ [ 11.624510][ T66] ffff88800cd59c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.624742][ T66] ffff88800cd59c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.624918][ T66] ================================================================== [ 11.625111][ T66] Disabling lock debugging due to kernel taint