[ 20.426454][ T11] ================================================================== [ 20.426690][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 20.426907][ T11] Read of size 8 at addr ffff8880056a00f8 by task kworker/u16:0/11 [ 20.427108][ T11] [ 20.427175][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 20.427381][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.427556][ T11] Workqueue: netns cleanup_net [ 20.427706][ T11] Call Trace: [ 20.427809][ T11] [ 20.427883][ T11] dump_stack_lvl+0x82/0xd0 [ 20.428026][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 20.428200][ T11] ? cleanup_net+0xa5d/0xb90 [ 20.428341][ T11] print_report+0xb4/0x270 [ 20.428478][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 20.428615][ T11] kasan_report+0xbd/0xf0 [ 20.428720][ T11] ? cleanup_net+0xa5d/0xb90 [ 20.428858][ T11] cleanup_net+0xa5d/0xb90 [ 20.428993][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.429134][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 20.429279][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 20.429417][ T11] ? lock_acquire+0x32/0xc0 [ 20.429555][ T11] ? process_one_work+0xe0b/0x16d0 [ 20.429696][ T11] process_one_work+0xe55/0x16d0 [ 20.429837][ T11] ? __pfx___lock_release+0x10/0x10 [ 20.429975][ T11] ? __pfx_process_one_work+0x10/0x10 [ 20.430113][ T11] ? assign_work+0x16c/0x240 [ 20.430250][ T11] worker_thread+0x58c/0xce0 [ 20.430392][ T11] ? __pfx_worker_thread+0x10/0x10 [ 20.430527][ T11] kthread+0x28a/0x350 [ 20.430631][ T11] ? __pfx_kthread+0x10/0x10 [ 20.430769][ T11] ret_from_fork+0x31/0x70 [ 20.430906][ T11] ? __pfx_kthread+0x10/0x10 [ 20.431042][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.431182][ T11] [ 20.431287][ T11] [ 20.431356][ T11] Allocated by task 255: [ 20.431457][ T11] kasan_save_stack+0x24/0x50 [ 20.431592][ T11] kasan_save_track+0x14/0x30 [ 20.431727][ T11] __kasan_slab_alloc+0x59/0x70 [ 20.431865][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.432005][ T11] copy_net_ns+0xc6/0x540 [ 20.432109][ T11] create_new_namespaces+0x35f/0x920 [ 20.432245][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 20.432380][ T11] ksys_unshare+0x2c4/0x6e0 [ 20.432516][ T11] __x64_sys_unshare+0x31/0x40 [ 20.432651][ T11] do_syscall_64+0xc1/0x1d0 [ 20.432785][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.432957][ T11] [ 20.433029][ T11] Freed by task 11: [ 20.433131][ T11] kasan_save_stack+0x24/0x50 [ 20.433267][ T11] kasan_save_track+0x14/0x30 [ 20.433403][ T11] kasan_save_free_info+0x3b/0x60 [ 20.433542][ T11] __kasan_slab_free+0x38/0x50 [ 20.433679][ T11] kmem_cache_free+0xf8/0x330 [ 20.433812][ T11] cleanup_net+0x5a8/0xb90 [ 20.433945][ T11] process_one_work+0xe55/0x16d0 [ 20.434081][ T11] worker_thread+0x58c/0xce0 [ 20.434218][ T11] kthread+0x28a/0x350 [ 20.434322][ T11] ret_from_fork+0x31/0x70 [ 20.434455][ T11] ret_from_fork_asm+0x1a/0x30 [ 20.434593][ T11] [ 20.434666][ T11] Last potentially related work creation: [ 20.434800][ T11] kasan_save_stack+0x24/0x50 [ 20.434938][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 20.435077][ T11] insert_work+0x34/0x230 [ 20.435182][ T11] __queue_work+0x5fd/0xa40 [ 20.435318][ T11] queue_delayed_work_on+0x8c/0xa0 [ 20.435456][ T11] __inet_insert_ifa+0x751/0xb10 [ 20.435597][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 20.435738][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 20.435879][ T11] netlink_rcv_skb+0x130/0x360 [ 20.436017][ T11] netlink_unicast+0x44b/0x710 [ 20.436155][ T11] netlink_sendmsg+0x723/0xbe0 [ 20.436292][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 20.436430][ T11] ___sys_sendmsg+0xee/0x170 [ 20.436565][ T11] __sys_sendmsg+0x109/0x1a0 [ 20.436701][ T11] do_syscall_64+0xc1/0x1d0 [ 20.436842][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.437015][ T11] [ 20.437085][ T11] Second to last potentially related work creation: [ 20.437249][ T11] kasan_save_stack+0x24/0x50 [ 20.437388][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 20.437527][ T11] insert_work+0x34/0x230 [ 20.437631][ T11] __queue_work+0x5fd/0xa40 [ 20.437769][ T11] queue_delayed_work_on+0x8c/0xa0 [ 20.437910][ T11] __inet_insert_ifa+0x751/0xb10 [ 20.438049][ T11] inetdev_event+0xb18/0xcf0 [ 20.438186][ T11] notifier_call_chain+0xcd/0x150 [ 20.438323][ T11] __dev_notify_flags+0xe6/0x250 [ 20.438463][ T11] dev_change_flags+0xec/0x160 [ 20.438599][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 20.438735][ T11] rtnl_newlink+0x6de/0xa80 [ 20.438872][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 20.439025][ T11] netlink_rcv_skb+0x130/0x360 [ 20.439170][ T11] netlink_unicast+0x44b/0x710 [ 20.439308][ T11] netlink_sendmsg+0x723/0xbe0 [ 20.439443][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 20.439579][ T11] ___sys_sendmsg+0xee/0x170 [ 20.439713][ T11] __sys_sendmsg+0x109/0x1a0 [ 20.439850][ T11] do_syscall_64+0xc1/0x1d0 [ 20.439986][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.440161][ T11] [ 20.440230][ T11] The buggy address belongs to the object at ffff8880056a0040 [ 20.440230][ T11] which belongs to the cache net_namespace of size 6528 [ 20.440588][ T11] The buggy address is located 184 bytes inside of [ 20.440588][ T11] freed 6528-byte region [ffff8880056a0040, ffff8880056a19c0) [ 20.440913][ T11] [ 20.440982][ T11] The buggy address belongs to the physical page: [ 20.441151][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880056a5140 pfn:0x56a0 [ 20.441424][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.441628][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.441805][ T11] page_type: f5(slab) [ 20.441914][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.442161][ T11] raw: ffff8880056a5140 0000000000040003 00000001f5000000 0000000000000000 [ 20.442403][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 20.442642][ T11] head: ffff8880056a5140 0000000000040003 00000001f5000000 0000000000000000 [ 20.442872][ T11] head: 0080000000000003 ffffea000015a801 ffffffffffffffff 0000000000000000 [ 20.443111][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.443348][ T11] page dumped because: kasan: bad access detected [ 20.443513][ T11] [ 20.443580][ T11] Memory state around the buggy address: [ 20.443711][ T11] ffff88800569ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.443915][ T11] ffff8880056a0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.444112][ T11] >ffff8880056a0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.444310][ T11] ^ [ 20.444507][ T11] ffff8880056a0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.444706][ T11] ffff8880056a0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.444903][ T11] ================================================================== [ 20.445190][ T11] Disabling lock debugging due to kernel taint