[ 15.001119][ T11] ================================================================== [ 15.001346][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.001564][ T11] Read of size 8 at addr ffff8880024700f8 by task kworker/u16:0/11 [ 15.001753][ T11] [ 15.001825][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 15.002018][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.002182][ T11] Workqueue: netns cleanup_net [ 15.002316][ T11] Call Trace: [ 15.002415][ T11] [ 15.002485][ T11] dump_stack_lvl+0x82/0xd0 [ 15.002619][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 15.002791][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.002923][ T11] print_report+0xb4/0x270 [ 15.003048][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 15.003177][ T11] kasan_report+0xbd/0xf0 [ 15.003281][ T11] ? cleanup_net+0xa5d/0xb90 [ 15.003428][ T11] cleanup_net+0xa5d/0xb90 [ 15.003557][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.003694][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 15.003823][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 15.003954][ T11] ? lock_acquire+0x32/0xc0 [ 15.004084][ T11] ? process_one_work+0xe0b/0x16d0 [ 15.004219][ T11] process_one_work+0xe55/0x16d0 [ 15.004351][ T11] ? __pfx___lock_release+0x10/0x10 [ 15.004481][ T11] ? __pfx_process_one_work+0x10/0x10 [ 15.004617][ T11] ? assign_work+0x16c/0x240 [ 15.004748][ T11] worker_thread+0x58c/0xce0 [ 15.004879][ T11] ? __pfx_worker_thread+0x10/0x10 [ 15.005007][ T11] kthread+0x28a/0x350 [ 15.005113][ T11] ? __pfx_kthread+0x10/0x10 [ 15.005245][ T11] ret_from_fork+0x31/0x70 [ 15.005371][ T11] ? __pfx_kthread+0x10/0x10 [ 15.005507][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.005646][ T11] [ 15.005750][ T11] [ 15.005817][ T11] Allocated by task 256: [ 15.005913][ T11] kasan_save_stack+0x24/0x50 [ 15.006041][ T11] kasan_save_track+0x14/0x30 [ 15.006169][ T11] __kasan_slab_alloc+0x59/0x70 [ 15.006299][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.006432][ T11] copy_net_ns+0xc6/0x540 [ 15.006528][ T11] create_new_namespaces+0x35f/0x920 [ 15.006661][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.006791][ T11] ksys_unshare+0x2c4/0x6e0 [ 15.006922][ T11] __x64_sys_unshare+0x31/0x40 [ 15.007050][ T11] do_syscall_64+0xc1/0x1d0 [ 15.007181][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.007341][ T11] [ 15.007407][ T11] Freed by task 11: [ 15.007508][ T11] kasan_save_stack+0x24/0x50 [ 15.007638][ T11] kasan_save_track+0x14/0x30 [ 15.007766][ T11] kasan_save_free_info+0x3b/0x60 [ 15.007895][ T11] __kasan_slab_free+0x38/0x50 [ 15.008027][ T11] kmem_cache_free+0xf8/0x330 [ 15.008176][ T11] cleanup_net+0x5a8/0xb90 [ 15.008305][ T11] process_one_work+0xe55/0x16d0 [ 15.008434][ T11] worker_thread+0x58c/0xce0 [ 15.008560][ T11] kthread+0x28a/0x350 [ 15.008660][ T11] ret_from_fork+0x31/0x70 [ 15.008789][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.008915][ T11] [ 15.008980][ T11] Last potentially related work creation: [ 15.009104][ T11] kasan_save_stack+0x24/0x50 [ 15.009234][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.009364][ T11] insert_work+0x34/0x230 [ 15.009463][ T11] __queue_work+0x5fd/0xa40 [ 15.009593][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.009725][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.009865][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 15.009995][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.010127][ T11] netlink_rcv_skb+0x130/0x360 [ 15.010258][ T11] netlink_unicast+0x44b/0x710 [ 15.010387][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.010519][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.010652][ T11] ___sys_sendmsg+0xee/0x170 [ 15.010781][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.010910][ T11] do_syscall_64+0xc1/0x1d0 [ 15.011037][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.011199][ T11] [ 15.011266][ T11] Second to last potentially related work creation: [ 15.011433][ T11] kasan_save_stack+0x24/0x50 [ 15.011572][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.011702][ T11] insert_work+0x34/0x230 [ 15.011801][ T11] __queue_work+0x5fd/0xa40 [ 15.011930][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.012063][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.012193][ T11] inetdev_event+0xb18/0xcf0 [ 15.012321][ T11] notifier_call_chain+0xcd/0x150 [ 15.012452][ T11] __dev_notify_flags+0xe6/0x250 [ 15.012585][ T11] dev_change_flags+0xec/0x160 [ 15.012714][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 15.012843][ T11] rtnl_newlink+0x6de/0xa80 [ 15.012973][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.013102][ T11] netlink_rcv_skb+0x130/0x360 [ 15.013230][ T11] netlink_unicast+0x44b/0x710 [ 15.013364][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.013494][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.013627][ T11] ___sys_sendmsg+0xee/0x170 [ 15.013758][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.013887][ T11] do_syscall_64+0xc1/0x1d0 [ 15.014016][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.014184][ T11] [ 15.014254][ T11] The buggy address belongs to the object at ffff888002470040 [ 15.014254][ T11] which belongs to the cache net_namespace of size 6528 [ 15.014598][ T11] The buggy address is located 184 bytes inside of [ 15.014598][ T11] freed 6528-byte region [ffff888002470040, ffff8880024719c0) [ 15.014913][ T11] [ 15.014981][ T11] The buggy address belongs to the physical page: [ 15.015141][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888002473640 pfn:0x2470 [ 15.015404][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.015604][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.015771][ T11] page_type: f5(slab) [ 15.015873][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.016102][ T11] raw: ffff888002473640 0000000000040002 00000001f5000000 0000000000000000 [ 15.016326][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.016562][ T11] head: ffff888002473640 0000000000040002 00000001f5000000 0000000000000000 [ 15.016784][ T11] head: 0080000000000003 ffffea0000091c01 ffffffffffffffff 0000000000000000 [ 15.017007][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.017232][ T11] page dumped because: kasan: bad access detected [ 15.017395][ T11] [ 15.017461][ T11] Memory state around the buggy address: [ 15.017588][ T11] ffff88800246ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.017777][ T11] ffff888002470000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.017961][ T11] >ffff888002470080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.018164][ T11] ^ [ 15.018347][ T11] ffff888002470100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.018532][ T11] ffff888002470180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.018718][ T11] ================================================================== [ 15.018934][ T11] Disabling lock debugging due to kernel taint