[ 35.423806][ T11] ================================================================== [ 35.424120][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 35.424402][ T11] Read of size 8 at addr ffff8880097c80f8 by task kworker/u16:0/11 [ 35.424671][ T11] [ 35.424770][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 35.425052][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 35.425287][ T11] Workqueue: netns cleanup_net [ 35.425488][ T11] Call Trace: [ 35.425631][ T11] [ 35.425733][ T11] dump_stack_lvl+0x82/0xd0 [ 35.425933][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 35.426171][ T11] ? cleanup_net+0x932/0xa40 [ 35.426362][ T11] print_report+0xb4/0x270 [ 35.426553][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 35.426744][ T11] kasan_report+0xbd/0xf0 [ 35.426892][ T11] ? cleanup_net+0x932/0xa40 [ 35.427083][ T11] cleanup_net+0x932/0xa40 [ 35.427273][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 35.427460][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 35.427647][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 35.427837][ T11] ? lock_acquire+0x32/0xc0 [ 35.428023][ T11] ? process_one_work+0xe0b/0x16d0 [ 35.428217][ T11] process_one_work+0xe55/0x16d0 [ 35.428406][ T11] ? __pfx___lock_release+0x10/0x10 [ 35.428588][ T11] ? __pfx_process_one_work+0x10/0x10 [ 35.428780][ T11] ? assign_work+0x16c/0x240 [ 35.428966][ T11] worker_thread+0x58c/0xce0 [ 35.429177][ T11] ? __pfx_worker_thread+0x10/0x10 [ 35.429366][ T11] kthread+0x28a/0x350 [ 35.429512][ T11] ? __pfx_kthread+0x10/0x10 [ 35.429700][ T11] ret_from_fork+0x31/0x70 [ 35.429883][ T11] ? __pfx_kthread+0x10/0x10 [ 35.430073][ T11] ret_from_fork_asm+0x1a/0x30 [ 35.430265][ T11] [ 35.430404][ T11] [ 35.430496][ T11] Allocated by task 249: [ 35.430639][ T11] kasan_save_stack+0x24/0x50 [ 35.430820][ T11] kasan_save_track+0x14/0x30 [ 35.431005][ T11] __kasan_slab_alloc+0x59/0x70 [ 35.431186][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 35.431377][ T11] copy_net_ns+0xc6/0x340 [ 35.431521][ T11] create_new_namespaces+0x35f/0x920 [ 35.431709][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 35.431894][ T11] ksys_unshare+0x2a9/0x660 [ 35.432084][ T11] __x64_sys_unshare+0x31/0x40 [ 35.432274][ T11] do_syscall_64+0xc1/0x1d0 [ 35.432458][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 35.432691][ T11] [ 35.432796][ T11] Freed by task 11: [ 35.432939][ T11] kasan_save_stack+0x24/0x50 [ 35.433132][ T11] kasan_save_track+0x14/0x30 [ 35.433316][ T11] kasan_save_free_info+0x3b/0x60 [ 35.433500][ T11] __kasan_slab_free+0x38/0x50 [ 35.433683][ T11] kmem_cache_free+0xf8/0x330 [ 35.433868][ T11] cleanup_net+0x5a8/0xa40 [ 35.434057][ T11] process_one_work+0xe55/0x16d0 [ 35.434244][ T11] worker_thread+0x58c/0xce0 [ 35.434433][ T11] kthread+0x28a/0x350 [ 35.434575][ T11] ret_from_fork+0x31/0x70 [ 35.434762][ T11] ret_from_fork_asm+0x1a/0x30 [ 35.434952][ T11] [ 35.435047][ T11] Last potentially related work creation: [ 35.435231][ T11] kasan_save_stack+0x24/0x50 [ 35.435426][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 35.435620][ T11] insert_work+0x34/0x230 [ 35.435767][ T11] __queue_work+0x5fd/0xa40 [ 35.435953][ T11] queue_delayed_work_on+0x8c/0xa0 [ 35.436140][ T11] __inet_insert_ifa+0x751/0xb10 [ 35.436329][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 35.436520][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 35.436709][ T11] netlink_rcv_skb+0x130/0x360 [ 35.436903][ T11] netlink_unicast+0x44b/0x710 [ 35.437103][ T11] netlink_sendmsg+0x723/0xbe0 [ 35.437295][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 35.437490][ T11] ___sys_sendmsg+0xee/0x170 [ 35.437681][ T11] __sys_sendmsg+0x109/0x1a0 [ 35.437865][ T11] do_syscall_64+0xc1/0x1d0 [ 35.438057][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 35.438293][ T11] [ 35.438391][ T11] Second to last potentially related work creation: [ 35.438630][ T11] kasan_save_stack+0x24/0x50 [ 35.438820][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 35.439011][ T11] insert_work+0x34/0x230 [ 35.439165][ T11] __queue_work+0x5fd/0xa40 [ 35.439352][ T11] queue_delayed_work_on+0x8c/0xa0 [ 35.439570][ T11] __inet_insert_ifa+0x751/0xb10 [ 35.439759][ T11] inetdev_event+0xb18/0xcf0 [ 35.439947][ T11] notifier_call_chain+0xcd/0x150 [ 35.440145][ T11] __dev_notify_flags+0xe6/0x250 [ 35.440333][ T11] dev_change_flags+0xec/0x160 [ 35.440519][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 35.440708][ T11] rtnl_newlink+0x6de/0xa80 [ 35.440894][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 35.441085][ T11] netlink_rcv_skb+0x130/0x360 [ 35.441278][ T11] netlink_unicast+0x44b/0x710 [ 35.441467][ T11] netlink_sendmsg+0x723/0xbe0 [ 35.441660][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 35.441848][ T11] ___sys_sendmsg+0xee/0x170 [ 35.442036][ T11] __sys_sendmsg+0x109/0x1a0 [ 35.442219][ T11] do_syscall_64+0xc1/0x1d0 [ 35.442398][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 35.442632][ T11] [ 35.442724][ T11] The buggy address belongs to the object at ffff8880097c8040 [ 35.442724][ T11] which belongs to the cache net_namespace of size 6592 [ 35.443207][ T11] The buggy address is located 184 bytes inside of [ 35.443207][ T11] freed 6592-byte region [ffff8880097c8040, ffff8880097c9a00) [ 35.443639][ T11] [ 35.443732][ T11] The buggy address belongs to the physical page: [ 35.443956][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x97c8 [ 35.444282][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 35.444563][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 35.444797][ T11] page_type: f5(slab) [ 35.444948][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 35.445287][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 35.445617][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 35.445946][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 35.446272][ T11] head: 0080000000000003 ffffea000025f201 ffffffffffffffff 0000000000000000 [ 35.446599][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 35.446929][ T11] page dumped because: kasan: bad access detected [ 35.447155][ T11] [ 35.447252][ T11] Memory state around the buggy address: [ 35.447427][ T11] ffff8880097c7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 35.447684][ T11] ffff8880097c8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 35.447936][ T11] >ffff8880097c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.448192][ T11] ^ [ 35.448444][ T11] ffff8880097c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.448697][ T11] ffff8880097c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.448979][ T11] ================================================================== [ 35.449338][ T11] Disabling lock debugging due to kernel taint