[ 14.761150][ T295] GACT probability NOT on [ 14.983543][ T299] drop_monitor: Initializing network drop monitor service [ 28.759255][ T11] ================================================================== [ 28.759558][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 28.759769][ T11] Read of size 8 at addr ffff8880028f80f8 by task kworker/u16:0/11 [ 28.759969][ T11] [ 28.760042][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 28.760253][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 28.760426][ T11] Workqueue: netns cleanup_net [ 28.760565][ T11] Call Trace: [ 28.760669][ T11] [ 28.760741][ T11] dump_stack_lvl+0x82/0xd0 [ 28.760882][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 28.761057][ T11] ? cleanup_net+0xa5d/0xb90 [ 28.761194][ T11] print_report+0xb4/0x270 [ 28.761330][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 28.761464][ T11] kasan_report+0xbd/0xf0 [ 28.761566][ T11] ? cleanup_net+0xa5d/0xb90 [ 28.761702][ T11] cleanup_net+0xa5d/0xb90 [ 28.761833][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 28.761975][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 28.762111][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 28.762255][ T11] ? lock_acquire+0x32/0xc0 [ 28.762388][ T11] ? process_one_work+0xe0b/0x16d0 [ 28.762527][ T11] process_one_work+0xe55/0x16d0 [ 28.762666][ T11] ? __pfx___lock_release+0x10/0x10 [ 28.762800][ T11] ? __pfx_process_one_work+0x10/0x10 [ 28.762940][ T11] ? assign_work+0x16c/0x240 [ 28.763074][ T11] worker_thread+0x58c/0xce0 [ 28.763211][ T11] ? __pfx_worker_thread+0x10/0x10 [ 28.763349][ T11] kthread+0x28a/0x350 [ 28.763452][ T11] ? __pfx_kthread+0x10/0x10 [ 28.763594][ T11] ret_from_fork+0x31/0x70 [ 28.763729][ T11] ? __pfx_kthread+0x10/0x10 [ 28.763863][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.764004][ T11] [ 28.764110][ T11] [ 28.764180][ T11] Allocated by task 267: [ 28.764281][ T11] kasan_save_stack+0x24/0x50 [ 28.764419][ T11] kasan_save_track+0x14/0x30 [ 28.764556][ T11] __kasan_slab_alloc+0x59/0x70 [ 28.764693][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 28.764831][ T11] copy_net_ns+0xc6/0x540 [ 28.764932][ T11] create_new_namespaces+0x35f/0x920 [ 28.765068][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 28.765209][ T11] ksys_unshare+0x2c4/0x6e0 [ 28.765345][ T11] __x64_sys_unshare+0x31/0x40 [ 28.765480][ T11] do_syscall_64+0xc1/0x1d0 [ 28.765616][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.765787][ T11] [ 28.765855][ T11] Freed by task 11: [ 28.765955][ T11] kasan_save_stack+0x24/0x50 [ 28.766093][ T11] kasan_save_track+0x14/0x30 [ 28.766226][ T11] kasan_save_free_info+0x3b/0x60 [ 28.766361][ T11] __kasan_slab_free+0x38/0x50 [ 28.766508][ T11] kmem_cache_free+0xf8/0x330 [ 28.766645][ T11] cleanup_net+0x5a8/0xb90 [ 28.766781][ T11] process_one_work+0xe55/0x16d0 [ 28.766917][ T11] worker_thread+0x58c/0xce0 [ 28.767052][ T11] kthread+0x28a/0x350 [ 28.767155][ T11] ret_from_fork+0x31/0x70 [ 28.767290][ T11] ret_from_fork_asm+0x1a/0x30 [ 28.767425][ T11] [ 28.767495][ T11] Last potentially related work creation: [ 28.767629][ T11] kasan_save_stack+0x24/0x50 [ 28.767765][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 28.767905][ T11] insert_work+0x34/0x230 [ 28.768009][ T11] __queue_work+0x5fd/0xa40 [ 28.768146][ T11] queue_delayed_work_on+0x8c/0xa0 [ 28.768282][ T11] __inet_insert_ifa+0x751/0xb10 [ 28.768422][ T11] inetdev_event+0xb18/0xcf0 [ 28.768561][ T11] notifier_call_chain+0xcd/0x150 [ 28.768697][ T11] __dev_notify_flags+0xe6/0x250 [ 28.768834][ T11] dev_change_flags+0xec/0x160 [ 28.768970][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 28.769108][ T11] rtnl_newlink+0x6de/0xa80 [ 28.769243][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 28.769378][ T11] netlink_rcv_skb+0x130/0x360 [ 28.769517][ T11] netlink_unicast+0x44b/0x710 [ 28.769656][ T11] netlink_sendmsg+0x723/0xbe0 [ 28.769791][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 28.769928][ T11] ___sys_sendmsg+0xee/0x170 [ 28.770070][ T11] __sys_sendmsg+0x109/0x1a0 [ 28.770209][ T11] do_syscall_64+0xc1/0x1d0 [ 28.770344][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.770515][ T11] [ 28.770584][ T11] The buggy address belongs to the object at ffff8880028f8040 [ 28.770584][ T11] which belongs to the cache net_namespace of size 6528 [ 28.770939][ T11] The buggy address is located 184 bytes inside of [ 28.770939][ T11] freed 6528-byte region [ffff8880028f8040, ffff8880028f99c0) [ 28.771261][ T11] [ 28.771329][ T11] The buggy address belongs to the physical page: [ 28.771491][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880028fb640 pfn:0x28f8 [ 28.771764][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 28.771966][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 28.772143][ T11] page_type: f5(slab) [ 28.772255][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 28.772491][ T11] raw: ffff8880028fb640 0000000000040002 00000001f5000000 0000000000000000 [ 28.772729][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 28.772964][ T11] head: ffff8880028fb640 0000000000040002 00000001f5000000 0000000000000000 [ 28.773196][ T11] head: 0080000000000003 ffffea00000a3e01 ffffffffffffffff 0000000000000000 [ 28.773435][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 28.773674][ T11] page dumped because: kasan: bad access detected [ 28.773843][ T11] [ 28.773911][ T11] Memory state around the buggy address: [ 28.774041][ T11] ffff8880028f7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.774241][ T11] ffff8880028f8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.774436][ T11] >ffff8880028f8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.774633][ T11] ^ [ 28.774824][ T11] ffff8880028f8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.775028][ T11] ffff8880028f8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.775220][ T11] ================================================================== [ 28.775474][ T11] Disabling lock debugging due to kernel taint