[ 11.226798][ T273] ip (273) used greatest stack depth: 23872 bytes left [ 14.468619][ T11] ================================================================== [ 14.468833][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.469020][ T11] Read of size 8 at addr ffff8880094180f8 by task kworker/u16:0/11 [ 14.469197][ T11] [ 14.469280][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 14.469477][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.469629][ T11] Workqueue: netns cleanup_net [ 14.469759][ T11] Call Trace: [ 14.469856][ T11] [ 14.469921][ T11] dump_stack_lvl+0x82/0xd0 [ 14.470050][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 14.470204][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.470330][ T11] print_report+0xb4/0x270 [ 14.470451][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 14.470573][ T11] kasan_report+0xbd/0xf0 [ 14.470666][ T11] ? cleanup_net+0xa5d/0xb90 [ 14.470788][ T11] cleanup_net+0xa5d/0xb90 [ 14.470909][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.471034][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 14.471155][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 14.471277][ T11] ? lock_acquire+0x32/0xc0 [ 14.471402][ T11] ? process_one_work+0xe0b/0x16d0 [ 14.471531][ T11] process_one_work+0xe55/0x16d0 [ 14.471656][ T11] ? __pfx___lock_release+0x10/0x10 [ 14.471779][ T11] ? __pfx_process_one_work+0x10/0x10 [ 14.471903][ T11] ? assign_work+0x16c/0x240 [ 14.472030][ T11] worker_thread+0x58c/0xce0 [ 14.472155][ T11] ? __pfx_worker_thread+0x10/0x10 [ 14.472279][ T11] kthread+0x28a/0x350 [ 14.472375][ T11] ? __pfx_kthread+0x10/0x10 [ 14.472499][ T11] ret_from_fork+0x31/0x70 [ 14.472621][ T11] ? __pfx_kthread+0x10/0x10 [ 14.472746][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.472872][ T11] [ 14.472967][ T11] [ 14.473030][ T11] Allocated by task 261: [ 14.473124][ T11] kasan_save_stack+0x24/0x50 [ 14.473251][ T11] kasan_save_track+0x14/0x30 [ 14.473372][ T11] __kasan_slab_alloc+0x59/0x70 [ 14.473492][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.473616][ T11] copy_net_ns+0xc6/0x540 [ 14.473708][ T11] create_new_namespaces+0x35f/0x920 [ 14.473831][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.473953][ T11] ksys_unshare+0x2c4/0x6e0 [ 14.474077][ T11] __x64_sys_unshare+0x31/0x40 [ 14.474202][ T11] do_syscall_64+0xc1/0x1d0 [ 14.474326][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.474477][ T11] [ 14.474542][ T11] Freed by task 11: [ 14.474635][ T11] kasan_save_stack+0x24/0x50 [ 14.474759][ T11] kasan_save_track+0x14/0x30 [ 14.474878][ T11] kasan_save_free_info+0x3b/0x60 [ 14.475001][ T11] __kasan_slab_free+0x38/0x50 [ 14.475122][ T11] kmem_cache_free+0xf8/0x330 [ 14.475241][ T11] cleanup_net+0x5a8/0xb90 [ 14.475362][ T11] process_one_work+0xe55/0x16d0 [ 14.475484][ T11] worker_thread+0x58c/0xce0 [ 14.475605][ T11] kthread+0x28a/0x350 [ 14.475698][ T11] ret_from_fork+0x31/0x70 [ 14.475818][ T11] ret_from_fork_asm+0x1a/0x30 [ 14.475939][ T11] [ 14.476002][ T11] Last potentially related work creation: [ 14.476124][ T11] kasan_save_stack+0x24/0x50 [ 14.476247][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.476369][ T11] insert_work+0x34/0x230 [ 14.476466][ T11] __queue_work+0x5fd/0xa40 [ 14.476584][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.476709][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.476835][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 14.476958][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.477084][ T11] netlink_rcv_skb+0x130/0x360 [ 14.477208][ T11] netlink_unicast+0x44b/0x710 [ 14.477330][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.477455][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.477581][ T11] ___sys_sendmsg+0xee/0x170 [ 14.477705][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.477828][ T11] do_syscall_64+0xc1/0x1d0 [ 14.477957][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.478114][ T11] [ 14.478179][ T11] Second to last potentially related work creation: [ 14.478334][ T11] kasan_save_stack+0x24/0x50 [ 14.478460][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 14.478584][ T11] insert_work+0x34/0x230 [ 14.478682][ T11] __queue_work+0x5fd/0xa40 [ 14.478804][ T11] queue_delayed_work_on+0x8c/0xa0 [ 14.478929][ T11] __inet_insert_ifa+0x751/0xb10 [ 14.479053][ T11] inetdev_event+0xb18/0xcf0 [ 14.479175][ T11] notifier_call_chain+0xcd/0x150 [ 14.479309][ T11] __dev_notify_flags+0xe6/0x250 [ 14.479434][ T11] dev_change_flags+0xec/0x160 [ 14.479558][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 14.479688][ T11] rtnl_newlink+0x6de/0xa80 [ 14.479812][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 14.479937][ T11] netlink_rcv_skb+0x130/0x360 [ 14.480061][ T11] netlink_unicast+0x44b/0x710 [ 14.480187][ T11] netlink_sendmsg+0x723/0xbe0 [ 14.480312][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 14.480436][ T11] ___sys_sendmsg+0xee/0x170 [ 14.480559][ T11] __sys_sendmsg+0x109/0x1a0 [ 14.480683][ T11] do_syscall_64+0xc1/0x1d0 [ 14.480803][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.480958][ T11] [ 14.481021][ T11] The buggy address belongs to the object at ffff888009418040 [ 14.481021][ T11] which belongs to the cache net_namespace of size 6528 [ 14.481344][ T11] The buggy address is located 184 bytes inside of [ 14.481344][ T11] freed 6528-byte region [ffff888009418040, ffff8880094199c0) [ 14.481642][ T11] [ 14.481704][ T11] The buggy address belongs to the physical page: [ 14.481851][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800941b640 pfn:0x9418 [ 14.482095][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.482301][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.482457][ T11] page_type: f5(slab) [ 14.482553][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.482773][ T11] raw: ffff88800941b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.482993][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.483216][ T11] head: ffff88800941b640 0000000000040002 00000001f5000000 0000000000000000 [ 14.483429][ T11] head: 0080000000000003 ffffea0000250601 ffffffffffffffff 0000000000000000 [ 14.483643][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.483854][ T11] page dumped because: kasan: bad access detected [ 14.484003][ T11] [ 14.484065][ T11] Memory state around the buggy address: [ 14.484182][ T11] ffff888009417f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 14.484360][ T11] ffff888009418000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.484535][ T11] >ffff888009418080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.484711][ T11] ^ [ 14.484887][ T11] ffff888009418100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.485061][ T11] ffff888009418180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.485237][ T11] ================================================================== [ 14.485467][ T11] Disabling lock debugging due to kernel taint [ 44.943530][ T868] IPv6: Can't replace route, no match found [ 46.984675][ T938] IPv6: Can't replace route, no match found [ 86.140506][ T1853] Mirror/redirect action on [ 171.868831][ T2480] veth2: entered promiscuous mode [ 171.900519][ T2480] veth2: left promiscuous mode