[ 15.919291][ T294] GACT probability NOT on [ 16.153456][ T298] drop_monitor: Initializing network drop monitor service [ 30.196047][ T11] ================================================================== [ 30.196318][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 30.196580][ T11] Read of size 8 at addr ffff8880050300f8 by task kworker/u16:0/11 [ 30.196810][ T11] [ 30.196912][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 30.197194][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 30.197431][ T11] Workqueue: netns cleanup_net [ 30.197617][ T11] Call Trace: [ 30.197772][ T11] [ 30.197878][ T11] dump_stack_lvl+0x82/0xd0 [ 30.198087][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 30.198347][ T11] ? cleanup_net+0xa5d/0xb90 [ 30.198560][ T11] print_report+0xb4/0x270 [ 30.198770][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 30.198982][ T11] kasan_report+0xbd/0xf0 [ 30.199137][ T11] ? cleanup_net+0xa5d/0xb90 [ 30.199345][ T11] cleanup_net+0xa5d/0xb90 [ 30.199530][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 30.199735][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 30.199929][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 30.200141][ T11] ? lock_acquire+0x32/0xc0 [ 30.200345][ T11] ? process_one_work+0xe0b/0x16d0 [ 30.200555][ T11] process_one_work+0xe55/0x16d0 [ 30.200703][ T11] ? __pfx___lock_release+0x10/0x10 [ 30.200872][ T11] ? __pfx_process_one_work+0x10/0x10 [ 30.201085][ T11] ? assign_work+0x16c/0x240 [ 30.201296][ T11] worker_thread+0x58c/0xce0 [ 30.201447][ T11] ? __pfx_worker_thread+0x10/0x10 [ 30.201633][ T11] kthread+0x28a/0x350 [ 30.201788][ T11] ? __pfx_kthread+0x10/0x10 [ 30.201976][ T11] ret_from_fork+0x31/0x70 [ 30.202133][ T11] ? __pfx_kthread+0x10/0x10 [ 30.202334][ T11] ret_from_fork_asm+0x1a/0x30 [ 30.202543][ T11] [ 30.202693][ T11] [ 30.202791][ T11] Allocated by task 267: [ 30.202922][ T11] kasan_save_stack+0x24/0x50 [ 30.203101][ T11] kasan_save_track+0x14/0x30 [ 30.203304][ T11] __kasan_slab_alloc+0x59/0x70 [ 30.203500][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 30.203698][ T11] copy_net_ns+0xc6/0x540 [ 30.203848][ T11] create_new_namespaces+0x35f/0x920 [ 30.204049][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 30.204215][ T11] ksys_unshare+0x2c4/0x6e0 [ 30.204354][ T11] __x64_sys_unshare+0x31/0x40 [ 30.204491][ T11] do_syscall_64+0xc1/0x1d0 [ 30.204690][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.204913][ T11] [ 30.204983][ T11] Freed by task 11: [ 30.205130][ T11] kasan_save_stack+0x24/0x50 [ 30.205343][ T11] kasan_save_track+0x14/0x30 [ 30.205537][ T11] kasan_save_free_info+0x3b/0x60 [ 30.205739][ T11] __kasan_slab_free+0x38/0x50 [ 30.205936][ T11] kmem_cache_free+0xf8/0x330 [ 30.206141][ T11] cleanup_net+0x5a8/0xb90 [ 30.206346][ T11] process_one_work+0xe55/0x16d0 [ 30.206534][ T11] worker_thread+0x58c/0xce0 [ 30.206730][ T11] kthread+0x28a/0x350 [ 30.206882][ T11] ret_from_fork+0x31/0x70 [ 30.207076][ T11] ret_from_fork_asm+0x1a/0x30 [ 30.207248][ T11] [ 30.207353][ T11] Last potentially related work creation: [ 30.207547][ T11] kasan_save_stack+0x24/0x50 [ 30.207733][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 30.207934][ T11] insert_work+0x34/0x230 [ 30.208074][ T11] __queue_work+0x5fd/0xa40 [ 30.208208][ T11] queue_delayed_work_on+0x8c/0xa0 [ 30.208344][ T11] __inet_insert_ifa+0x751/0xb10 [ 30.208477][ T11] inetdev_event+0xb18/0xcf0 [ 30.208606][ T11] notifier_call_chain+0xcd/0x150 [ 30.208747][ T11] __dev_notify_flags+0xe6/0x250 [ 30.208892][ T11] dev_change_flags+0xec/0x160 [ 30.209072][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 30.209270][ T11] rtnl_newlink+0x6de/0xa80 [ 30.209466][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 30.209651][ T11] netlink_rcv_skb+0x130/0x360 [ 30.209849][ T11] netlink_unicast+0x44b/0x710 [ 30.210059][ T11] netlink_sendmsg+0x723/0xbe0 [ 30.210266][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 30.210445][ T11] ___sys_sendmsg+0xee/0x170 [ 30.210654][ T11] __sys_sendmsg+0x109/0x1a0 [ 30.210853][ T11] do_syscall_64+0xc1/0x1d0 [ 30.211063][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 30.211335][ T11] [ 30.211442][ T11] The buggy address belongs to the object at ffff888005030040 [ 30.211442][ T11] which belongs to the cache net_namespace of size 6528 [ 30.211954][ T11] The buggy address is located 184 bytes inside of [ 30.211954][ T11] freed 6528-byte region [ffff888005030040, ffff8880050319c0) [ 30.212312][ T11] [ 30.212382][ T11] The buggy address belongs to the physical page: [ 30.212592][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005033640 pfn:0x5030 [ 30.212951][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 30.213204][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 30.213452][ T11] page_type: f5(slab) [ 30.213623][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 30.213934][ T11] raw: ffff888005033640 0000000000040002 00000001f5000000 0000000000000000 [ 30.214276][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 30.214618][ T11] head: ffff888005033640 0000000000040002 00000001f5000000 0000000000000000 [ 30.214961][ T11] head: 0080000000000003 ffffea0000140c01 ffffffffffffffff 0000000000000000 [ 30.215310][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 30.215649][ T11] page dumped because: kasan: bad access detected [ 30.215887][ T11] [ 30.215982][ T11] Memory state around the buggy address: [ 30.216168][ T11] ffff88800502ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.216453][ T11] ffff888005030000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.216730][ T11] >ffff888005030080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.217002][ T11] ^ [ 30.217278][ T11] ffff888005030100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.217565][ T11] ffff888005030180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.217837][ T11] ================================================================== [ 30.218152][ T11] Disabling lock debugging due to kernel taint