[ 27.580301][ T628] ip (628) used greatest stack depth: 23344 bytes left [ 32.777541][ T66] ================================================================== [ 32.777766][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 32.777972][ T66] Read of size 8 at addr ffff88800ba79bf8 by task kworker/u16:1/66 [ 32.778167][ T66] [ 32.778242][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 32.778448][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 32.778614][ T66] Workqueue: netns cleanup_net [ 32.778759][ T66] Call Trace: [ 32.778872][ T66] [ 32.778945][ T66] dump_stack_lvl+0x82/0xd0 [ 32.779083][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 32.779255][ T66] ? cleanup_net+0xa5d/0xb90 [ 32.779393][ T66] print_report+0xb4/0x270 [ 32.779529][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 32.779661][ T66] kasan_report+0xbd/0xf0 [ 32.779763][ T66] ? cleanup_net+0xa5d/0xb90 [ 32.779899][ T66] cleanup_net+0xa5d/0xb90 [ 32.780032][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 32.780163][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 32.780288][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 32.780419][ T66] ? lock_acquire+0x32/0xc0 [ 32.780545][ T66] ? process_one_work+0xe0b/0x16d0 [ 32.780673][ T66] process_one_work+0xe55/0x16d0 [ 32.780799][ T66] ? __pfx___lock_release+0x10/0x10 [ 32.780930][ T66] ? __pfx_process_one_work+0x10/0x10 [ 32.781061][ T66] ? assign_work+0x16c/0x240 [ 32.781187][ T66] worker_thread+0x58c/0xce0 [ 32.781314][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 32.781476][ T66] ? __pfx_worker_thread+0x10/0x10 [ 32.781603][ T66] ? __pfx_worker_thread+0x10/0x10 [ 32.781730][ T66] kthread+0x28a/0x350 [ 32.781826][ T66] ? __pfx_kthread+0x10/0x10 [ 32.781953][ T66] ret_from_fork+0x31/0x70 [ 32.782078][ T66] ? __pfx_kthread+0x10/0x10 [ 32.782202][ T66] ret_from_fork_asm+0x1a/0x30 [ 32.782335][ T66] [ 32.782433][ T66] [ 32.782497][ T66] Allocated by task 625: [ 32.782592][ T66] kasan_save_stack+0x24/0x50 [ 32.782719][ T66] kasan_save_track+0x14/0x30 [ 32.782842][ T66] __kasan_slab_alloc+0x59/0x70 [ 32.782969][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 32.783097][ T66] copy_net_ns+0xc6/0x540 [ 32.783191][ T66] create_new_namespaces+0x35f/0x920 [ 32.783318][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 32.783447][ T66] ksys_unshare+0x2c4/0x6e0 [ 32.783572][ T66] __x64_sys_unshare+0x31/0x40 [ 32.783696][ T66] do_syscall_64+0xc1/0x1d0 [ 32.783820][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.783977][ T66] [ 32.784041][ T66] Freed by task 66: [ 32.784137][ T66] kasan_save_stack+0x24/0x50 [ 32.784264][ T66] kasan_save_track+0x14/0x30 [ 32.784389][ T66] kasan_save_free_info+0x3b/0x60 [ 32.784515][ T66] __kasan_slab_free+0x38/0x50 [ 32.784637][ T66] kmem_cache_free+0xf8/0x330 [ 32.784759][ T66] cleanup_net+0x5a8/0xb90 [ 32.784892][ T66] process_one_work+0xe55/0x16d0 [ 32.785021][ T66] worker_thread+0x58c/0xce0 [ 32.785144][ T66] kthread+0x28a/0x350 [ 32.785348][ T66] ret_from_fork+0x31/0x70 [ 32.785478][ T66] ret_from_fork_asm+0x1a/0x30 [ 32.785605][ T66] [ 32.785671][ T66] Last potentially related work creation: [ 32.785794][ T66] kasan_save_stack+0x24/0x50 [ 32.785922][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 32.786048][ T66] insert_work+0x34/0x230 [ 32.786146][ T66] __queue_work+0x5fd/0xa40 [ 32.786272][ T66] queue_delayed_work_on+0x8c/0xa0 [ 32.786396][ T66] __inet_insert_ifa+0x751/0xb10 [ 32.786526][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 32.786652][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 32.786778][ T66] netlink_rcv_skb+0x130/0x360 [ 32.786906][ T66] netlink_unicast+0x44b/0x710 [ 32.787036][ T66] netlink_sendmsg+0x723/0xbe0 [ 32.787161][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 32.787290][ T66] ___sys_sendmsg+0xee/0x170 [ 32.787418][ T66] __sys_sendmsg+0x109/0x1a0 [ 32.787546][ T66] do_syscall_64+0xc1/0x1d0 [ 32.787674][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.787830][ T66] [ 32.787896][ T66] Second to last potentially related work creation: [ 32.788051][ T66] kasan_save_stack+0x24/0x50 [ 32.788189][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 32.788314][ T66] insert_work+0x34/0x230 [ 32.788409][ T66] __queue_work+0x5fd/0xa40 [ 32.788536][ T66] queue_delayed_work_on+0x8c/0xa0 [ 32.788664][ T66] __inet_insert_ifa+0x751/0xb10 [ 32.788788][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 32.788917][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 32.789045][ T66] netlink_rcv_skb+0x130/0x360 [ 32.789170][ T66] netlink_unicast+0x44b/0x710 [ 32.789298][ T66] netlink_sendmsg+0x723/0xbe0 [ 32.789424][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 32.789550][ T66] ___sys_sendmsg+0xee/0x170 [ 32.789675][ T66] __sys_sendmsg+0x109/0x1a0 [ 32.789799][ T66] do_syscall_64+0xc1/0x1d0 [ 32.789926][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.790086][ T66] [ 32.790150][ T66] The buggy address belongs to the object at ffff88800ba79b40 [ 32.790150][ T66] which belongs to the cache net_namespace of size 6528 [ 32.790480][ T66] The buggy address is located 184 bytes inside of [ 32.790480][ T66] freed 6528-byte region [ffff88800ba79b40, ffff88800ba7b4c0) [ 32.790781][ T66] [ 32.790845][ T66] The buggy address belongs to the physical page: [ 32.790997][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ba7d140 pfn:0xba78 [ 32.791249][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 32.791445][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 32.791612][ T66] page_type: f5(slab) [ 32.791713][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 32.791941][ T66] raw: ffff88800ba7d140 0000000000040003 00000001f5000000 0000000000000000 [ 32.792162][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 32.792382][ T66] head: ffff88800ba7d140 0000000000040003 00000001f5000000 0000000000000000 [ 32.792616][ T66] head: 0080000000000003 ffffea00002e9e01 ffffffffffffffff 0000000000000000 [ 32.792834][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 32.793052][ T66] page dumped because: kasan: bad access detected [ 32.793206][ T66] [ 32.793270][ T66] Memory state around the buggy address: [ 32.793391][ T66] ffff88800ba79a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.793577][ T66] ffff88800ba79b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.793755][ T66] >ffff88800ba79b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.793935][ T66] ^ [ 32.794115][ T66] ffff88800ba79c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.794297][ T66] ffff88800ba79c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.794476][ T66] ================================================================== [ 32.794679][ T66] Disabling lock debugging due to kernel taint