[ 15.320653][ T11] ================================================================== [ 15.320894][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.321108][ T11] Read of size 8 at addr ffff888009ab00f8 by task kworker/u16:0/11 [ 15.321293][ T11] [ 15.321362][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 15.321567][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.321758][ T11] Workqueue: netns cleanup_net [ 15.321907][ T11] Call Trace: [ 15.322005][ T11] [ 15.322075][ T11] dump_stack_lvl+0x82/0xd0 [ 15.322210][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 15.322378][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.322519][ T11] print_report+0xb4/0x270 [ 15.322669][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 15.322823][ T11] kasan_report+0xbd/0xf0 [ 15.322923][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.323054][ T11] cleanup_net+0xa5d/0xb90 [ 15.323186][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.323325][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 15.323466][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 15.323616][ T11] ? lock_acquire+0x32/0xc0 [ 15.323755][ T11] ? process_one_work+0xe0b/0x16d0 [ 15.323893][ T11] process_one_work+0xe55/0x16d0 [ 15.324025][ T11] ? __pfx___lock_release+0x10/0x10 [ 15.324160][ T11] ? __pfx_process_one_work+0x10/0x10 [ 15.324298][ T11] ? assign_work+0x16c/0x240 [ 15.324430][ T11] worker_thread+0x58c/0xce0 [ 15.324568][ T11] ? __pfx_worker_thread+0x10/0x10 [ 15.324704][ T11] kthread+0x28a/0x350 [ 15.324815][ T11] ? __pfx_kthread+0x10/0x10 [ 15.324949][ T11] ret_from_fork+0x31/0x70 [ 15.325087][ T11] ? __pfx_kthread+0x10/0x10 [ 15.325224][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.325364][ T11] [ 15.325469][ T11] [ 15.325538][ T11] Allocated by task 252: [ 15.325646][ T11] kasan_save_stack+0x24/0x50 [ 15.325813][ T11] kasan_save_track+0x14/0x30 [ 15.325947][ T11] __kasan_slab_alloc+0x59/0x70 [ 15.326092][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.326230][ T11] copy_net_ns+0xc6/0x540 [ 15.326330][ T11] create_new_namespaces+0x35f/0x920 [ 15.326463][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.326597][ T11] ksys_unshare+0x2c4/0x6e0 [ 15.326732][ T11] __x64_sys_unshare+0x31/0x40 [ 15.326859][ T11] do_syscall_64+0xc1/0x1d0 [ 15.326995][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.327157][ T11] [ 15.327224][ T11] Freed by task 11: [ 15.327327][ T11] kasan_save_stack+0x24/0x50 [ 15.327464][ T11] kasan_save_track+0x14/0x30 [ 15.327596][ T11] kasan_save_free_info+0x3b/0x60 [ 15.327731][ T11] __kasan_slab_free+0x38/0x50 [ 15.327860][ T11] kmem_cache_free+0xf8/0x330 [ 15.327988][ T11] cleanup_net+0x5a8/0xb90 [ 15.328120][ T11] process_one_work+0xe55/0x16d0 [ 15.328247][ T11] worker_thread+0x58c/0xce0 [ 15.328375][ T11] kthread+0x28a/0x350 [ 15.328472][ T11] ret_from_fork+0x31/0x70 [ 15.328622][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.328759][ T11] [ 15.328828][ T11] Last potentially related work creation: [ 15.328959][ T11] kasan_save_stack+0x24/0x50 [ 15.329096][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.329227][ T11] insert_work+0x34/0x230 [ 15.329323][ T11] __queue_work+0x5fd/0xa40 [ 15.329448][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.329593][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.329754][ T11] inetdev_event+0xb18/0xcf0 [ 15.329882][ T11] notifier_call_chain+0xcd/0x150 [ 15.330015][ T11] __dev_notify_flags+0xe6/0x250 [ 15.330163][ T11] dev_change_flags+0xec/0x160 [ 15.330298][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 15.330435][ T11] rtnl_newlink+0x6de/0xa80 [ 15.330566][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.330700][ T11] netlink_rcv_skb+0x130/0x360 [ 15.330839][ T11] netlink_unicast+0x44b/0x710 [ 15.330976][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.331110][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.331247][ T11] ___sys_sendmsg+0xee/0x170 [ 15.331393][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.331523][ T11] do_syscall_64+0xc1/0x1d0 [ 15.331655][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.331817][ T11] [ 15.331885][ T11] The buggy address belongs to the object at ffff888009ab0040 [ 15.331885][ T11] which belongs to the cache net_namespace of size 6528 [ 15.332223][ T11] The buggy address is located 184 bytes inside of [ 15.332223][ T11] freed 6528-byte region [ffff888009ab0040, ffff888009ab19c0) [ 15.332534][ T11] [ 15.332602][ T11] The buggy address belongs to the physical page: [ 15.332762][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009ab5140 pfn:0x9ab0 [ 15.333025][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.333262][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.333439][ T11] page_type: f5(slab) [ 15.333558][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.333821][ T11] raw: ffff888009ab5140 0000000000040003 00000001f5000000 0000000000000000 [ 15.334057][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.334296][ T11] head: ffff888009ab5140 0000000000040003 00000001f5000000 0000000000000000 [ 15.334527][ T11] head: 0080000000000003 ffffea000026ac01 ffffffffffffffff 0000000000000000 [ 15.334757][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.334986][ T11] page dumped because: kasan: bad access detected [ 15.335153][ T11] [ 15.335221][ T11] Memory state around the buggy address: [ 15.335348][ T11] ffff888009aaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.335537][ T11] ffff888009ab0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.335726][ T11] >ffff888009ab0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.335921][ T11] ^ [ 15.336109][ T11] ffff888009ab0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.336295][ T11] ffff888009ab0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.336486][ T11] ================================================================== [ 15.336698][ T11] Disabling lock debugging due to kernel taint