[ 17.237809][ T64] ================================================================== [ 17.238121][ T64] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 17.238398][ T64] Read of size 8 at addr ffff8880087780f8 by task kworker/u16:1/64 [ 17.238621][ T64] [ 17.238700][ T64] CPU: 2 UID: 0 PID: 64 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 17.238934][ T64] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 17.239134][ T64] Workqueue: netns cleanup_net [ 17.239304][ T64] Call Trace: [ 17.239427][ T64] [ 17.239513][ T64] dump_stack_lvl+0x82/0xd0 [ 17.239680][ T64] print_address_description.constprop.0+0x2c/0x3b0 [ 17.239880][ T64] ? cleanup_net+0x932/0xa40 [ 17.240036][ T64] print_report+0xb4/0x270 [ 17.240225][ T64] ? kasan_addr_to_slab+0x25/0x80 [ 17.240386][ T64] kasan_report+0xbd/0xf0 [ 17.240516][ T64] ? cleanup_net+0x932/0xa40 [ 17.240697][ T64] cleanup_net+0x932/0xa40 [ 17.240869][ T64] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 17.241046][ T64] ? __pfx_cleanup_net+0x10/0x10 [ 17.241212][ T64] ? trace_lock_acquire+0x148/0x1f0 [ 17.241432][ T64] ? lock_acquire+0x32/0xc0 [ 17.241602][ T64] ? process_one_work+0xe0b/0x16d0 [ 17.241775][ T64] process_one_work+0xe55/0x16d0 [ 17.241947][ T64] ? __pfx___lock_release+0x10/0x10 [ 17.242122][ T64] ? __pfx_process_one_work+0x10/0x10 [ 17.242291][ T64] ? assign_work+0x16c/0x240 [ 17.242460][ T64] worker_thread+0x58c/0xce0 [ 17.242625][ T64] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 17.242835][ T64] ? __pfx_worker_thread+0x10/0x10 [ 17.243004][ T64] ? __pfx_worker_thread+0x10/0x10 [ 17.243172][ T64] kthread+0x28a/0x350 [ 17.243304][ T64] ? __pfx_kthread+0x10/0x10 [ 17.243489][ T64] ret_from_fork+0x31/0x70 [ 17.243662][ T64] ? __pfx_kthread+0x10/0x10 [ 17.243830][ T64] ret_from_fork_asm+0x1a/0x30 [ 17.244007][ T64] [ 17.244139][ T64] [ 17.244230][ T64] Allocated by task 224: [ 17.244358][ T64] kasan_save_stack+0x24/0x50 [ 17.244534][ T64] kasan_save_track+0x14/0x30 [ 17.244708][ T64] __kasan_slab_alloc+0x59/0x70 [ 17.244879][ T64] kmem_cache_alloc_noprof+0x10b/0x350 [ 17.245052][ T64] copy_net_ns+0xc6/0x340 [ 17.245180][ T64] create_new_namespaces+0x35f/0x920 [ 17.245362][ T64] unshare_nsproxy_namespaces+0x8d/0x130 [ 17.245556][ T64] ksys_unshare+0x2a9/0x660 [ 17.245739][ T64] __x64_sys_unshare+0x31/0x40 [ 17.245918][ T64] do_syscall_64+0xc1/0x1d0 [ 17.246096][ T64] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.246318][ T64] [ 17.246419][ T64] Freed by task 64: [ 17.246560][ T64] kasan_save_stack+0x24/0x50 [ 17.246759][ T64] kasan_save_track+0x14/0x30 [ 17.246935][ T64] kasan_save_free_info+0x3b/0x60 [ 17.247123][ T64] __kasan_slab_free+0x38/0x50 [ 17.247302][ T64] kmem_cache_free+0xf8/0x330 [ 17.247480][ T64] cleanup_net+0x5a8/0xa40 [ 17.247656][ T64] process_one_work+0xe55/0x16d0 [ 17.247835][ T64] worker_thread+0x58c/0xce0 [ 17.248015][ T64] kthread+0x28a/0x350 [ 17.248154][ T64] ret_from_fork+0x31/0x70 [ 17.248327][ T64] ret_from_fork_asm+0x1a/0x30 [ 17.248507][ T64] [ 17.248602][ T64] Last potentially related work creation: [ 17.248779][ T64] kasan_save_stack+0x24/0x50 [ 17.248967][ T64] __kasan_record_aux_stack+0x8e/0xa0 [ 17.249158][ T64] insert_work+0x34/0x230 [ 17.249302][ T64] __queue_work+0x5fd/0xa40 [ 17.249492][ T64] queue_delayed_work_on+0x8c/0xa0 [ 17.249677][ T64] __inet_insert_ifa+0x751/0xb10 [ 17.249871][ T64] inet_rtm_newaddr+0x833/0xbd0 [ 17.250053][ T64] rtnetlink_rcv_msg+0x712/0xc10 [ 17.250245][ T64] netlink_rcv_skb+0x130/0x360 [ 17.250435][ T64] netlink_unicast+0x44b/0x710 [ 17.250620][ T64] netlink_sendmsg+0x723/0xbe0 [ 17.250812][ T64] ____sys_sendmsg+0x7ac/0xa10 [ 17.251046][ T64] ___sys_sendmsg+0xee/0x170 [ 17.251252][ T64] __sys_sendmsg+0x109/0x1a0 [ 17.251441][ T64] do_syscall_64+0xc1/0x1d0 [ 17.251627][ T64] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 17.251865][ T64] [ 17.251961][ T64] The buggy address belongs to the object at ffff888008778040 [ 17.251961][ T64] which belongs to the cache net_namespace of size 5696 [ 17.252439][ T64] The buggy address is located 184 bytes inside of [ 17.252439][ T64] freed 5696-byte region [ffff888008778040, ffff888008779680) [ 17.252860][ T64] [ 17.252950][ T64] The buggy address belongs to the physical page: [ 17.253173][ T64] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800877afc0 pfn:0x8778 [ 17.253561][ T64] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 17.253849][ T64] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 17.254089][ T64] page_type: f5(slab) [ 17.254237][ T64] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.254603][ T64] raw: ffff88800877afc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.254910][ T64] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 17.255215][ T64] head: ffff88800877afc0 0000000000050002 00000001f5000000 0000000000000000 [ 17.255516][ T64] head: 0080000000000003 ffffea000021de01 ffffffffffffffff 0000000000000000 [ 17.255870][ T64] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 17.256194][ T64] page dumped because: kasan: bad access detected [ 17.256527][ T64] [ 17.256623][ T64] Memory state around the buggy address: [ 17.256802][ T64] ffff888008777f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 17.257061][ T64] ffff888008778000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 17.257329][ T64] >ffff888008778080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.257593][ T64] ^ [ 17.257931][ T64] ffff888008778100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.258187][ T64] ffff888008778180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 17.258441][ T64] ================================================================== [ 17.258788][ T64] Disabling lock debugging due to kernel taint