[ 10.670516][ T259] ip (259) used greatest stack depth: 23280 bytes left [ 13.343242][ T11] ================================================================== [ 13.343464][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.343662][ T11] Read of size 8 at addr ffff88800c1f00f8 by task kworker/u16:0/11 [ 13.343852][ T11] [ 13.343915][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.344107][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.344263][ T11] Workqueue: netns cleanup_net [ 13.344399][ T11] Call Trace: [ 13.344492][ T11] [ 13.344558][ T11] dump_stack_lvl+0x82/0xd0 [ 13.344685][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.344841][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.344975][ T11] print_report+0xb4/0x270 [ 13.345117][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.345243][ T11] kasan_report+0xbd/0xf0 [ 13.345347][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.345479][ T11] cleanup_net+0xa5d/0xb90 [ 13.345609][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.345740][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.345872][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.345998][ T11] ? lock_acquire+0x32/0xc0 [ 13.346121][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.346253][ T11] process_one_work+0xe55/0x16d0 [ 13.346379][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.346510][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.346640][ T11] ? assign_work+0x16c/0x240 [ 13.346769][ T11] worker_thread+0x58c/0xce0 [ 13.346899][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.347026][ T11] kthread+0x28a/0x350 [ 13.347131][ T11] ? __pfx_kthread+0x10/0x10 [ 13.347265][ T11] ret_from_fork+0x31/0x70 [ 13.347394][ T11] ? __pfx_kthread+0x10/0x10 [ 13.347527][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.347655][ T11] [ 13.347752][ T11] [ 13.347821][ T11] Allocated by task 251: [ 13.347920][ T11] kasan_save_stack+0x24/0x50 [ 13.348050][ T11] kasan_save_track+0x14/0x30 [ 13.348181][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.348312][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.348443][ T11] copy_net_ns+0xc6/0x540 [ 13.348535][ T11] create_new_namespaces+0x35f/0x920 [ 13.348663][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.348789][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.348918][ T11] __x64_sys_unshare+0x31/0x40 [ 13.349046][ T11] do_syscall_64+0xc1/0x1d0 [ 13.349178][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.349334][ T11] [ 13.349397][ T11] Freed by task 11: [ 13.349494][ T11] kasan_save_stack+0x24/0x50 [ 13.349617][ T11] kasan_save_track+0x14/0x30 [ 13.349740][ T11] kasan_save_free_info+0x3b/0x60 [ 13.349869][ T11] __kasan_slab_free+0x38/0x50 [ 13.349993][ T11] kmem_cache_free+0xf8/0x330 [ 13.350124][ T11] cleanup_net+0x5a8/0xb90 [ 13.350251][ T11] process_one_work+0xe55/0x16d0 [ 13.350379][ T11] worker_thread+0x58c/0xce0 [ 13.350510][ T11] kthread+0x28a/0x350 [ 13.350609][ T11] ret_from_fork+0x31/0x70 [ 13.350730][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.350858][ T11] [ 13.350921][ T11] Last potentially related work creation: [ 13.351045][ T11] kasan_save_stack+0x24/0x50 [ 13.351173][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.351300][ T11] insert_work+0x34/0x230 [ 13.351393][ T11] __queue_work+0x5fd/0xa40 [ 13.351522][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.351646][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.351777][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.351909][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.352035][ T11] netlink_rcv_skb+0x130/0x360 [ 13.352169][ T11] netlink_unicast+0x44b/0x710 [ 13.352301][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.352433][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.352561][ T11] ___sys_sendmsg+0xee/0x170 [ 13.352691][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.352815][ T11] do_syscall_64+0xc1/0x1d0 [ 13.352940][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.353093][ T11] [ 13.353155][ T11] Second to last potentially related work creation: [ 13.353303][ T11] kasan_save_stack+0x24/0x50 [ 13.353425][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.353546][ T11] insert_work+0x34/0x230 [ 13.353637][ T11] __queue_work+0x5fd/0xa40 [ 13.353762][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.353888][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.354010][ T11] inetdev_event+0xb18/0xcf0 [ 13.354130][ T11] notifier_call_chain+0xcd/0x150 [ 13.354251][ T11] __dev_notify_flags+0xe6/0x250 [ 13.354376][ T11] dev_change_flags+0xec/0x160 [ 13.354497][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.354617][ T11] rtnl_newlink+0x6de/0xa80 [ 13.354741][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.354867][ T11] netlink_rcv_skb+0x130/0x360 [ 13.354989][ T11] netlink_unicast+0x44b/0x710 [ 13.355118][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.355241][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.355362][ T11] ___sys_sendmsg+0xee/0x170 [ 13.355483][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.355605][ T11] do_syscall_64+0xc1/0x1d0 [ 13.355729][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.355883][ T11] [ 13.355944][ T11] The buggy address belongs to the object at ffff88800c1f0040 [ 13.355944][ T11] which belongs to the cache net_namespace of size 6528 [ 13.356264][ T11] The buggy address is located 184 bytes inside of [ 13.356264][ T11] freed 6528-byte region [ffff88800c1f0040, ffff88800c1f19c0) [ 13.356552][ T11] [ 13.356617][ T11] The buggy address belongs to the physical page: [ 13.356785][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c1f5140 pfn:0xc1f0 [ 13.357028][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.357209][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.357364][ T11] page_type: f5(slab) [ 13.357468][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.357681][ T11] raw: ffff88800c1f5140 0000000000040003 00000001f5000000 0000000000000000 [ 13.357899][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.358113][ T11] head: ffff88800c1f5140 0000000000040003 00000001f5000000 0000000000000000 [ 13.358331][ T11] head: 0080000000000003 ffffea0000307c01 ffffffffffffffff 0000000000000000 [ 13.358546][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.358758][ T11] page dumped because: kasan: bad access detected [ 13.358910][ T11] [ 13.358974][ T11] Memory state around the buggy address: [ 13.359091][ T11] ffff88800c1eff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.359273][ T11] ffff88800c1f0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.359450][ T11] >ffff88800c1f0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.359628][ T11] ^ [ 13.359802][ T11] ffff88800c1f0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.359984][ T11] ffff88800c1f0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.360164][ T11] ================================================================== [ 13.360377][ T11] Disabling lock debugging due to kernel taint