[ 10.600354][ T256] ip (256) used greatest stack depth: 24024 bytes left [ 15.532673][ T65] ================================================================== [ 15.533146][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 15.533450][ T65] Read of size 8 at addr ffff888004eb1bf8 by task kworker/u16:1/65 [ 15.533746][ T65] [ 15.533851][ T65] CPU: 1 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 15.534147][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.534402][ T65] Workqueue: netns cleanup_net [ 15.534619][ T65] Call Trace: [ 15.534775][ T65] [ 15.534883][ T65] dump_stack_lvl+0x82/0xd0 [ 15.535094][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 15.535350][ T65] ? cleanup_net+0xa5d/0xb90 [ 15.535564][ T65] print_report+0xb4/0x270 [ 15.535771][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 15.535985][ T65] kasan_report+0xbd/0xf0 [ 15.536143][ T65] ? cleanup_net+0xa5d/0xb90 [ 15.536353][ T65] cleanup_net+0xa5d/0xb90 [ 15.536561][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.536769][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 15.536981][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 15.537193][ T65] ? lock_acquire+0x32/0xc0 [ 15.537401][ T65] ? process_one_work+0xe0b/0x16d0 [ 15.537616][ T65] process_one_work+0xe55/0x16d0 [ 15.537830][ T65] ? __pfx___lock_release+0x10/0x10 [ 15.538041][ T65] ? __pfx_process_one_work+0x10/0x10 [ 15.538253][ T65] ? assign_work+0x16c/0x240 [ 15.538461][ T65] worker_thread+0x58c/0xce0 [ 15.538667][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 15.538919][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.539140][ T65] ? __pfx_worker_thread+0x10/0x10 [ 15.539341][ T65] kthread+0x28a/0x350 [ 15.539492][ T65] ? __pfx_kthread+0x10/0x10 [ 15.539698][ T65] ret_from_fork+0x31/0x70 [ 15.539897][ T65] ? __pfx_kthread+0x10/0x10 [ 15.540103][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.540317][ T65] [ 15.540471][ T65] [ 15.540578][ T65] Allocated by task 253: [ 15.540730][ T65] kasan_save_stack+0x24/0x50 [ 15.540936][ T65] kasan_save_track+0x14/0x30 [ 15.541137][ T65] __kasan_slab_alloc+0x59/0x70 [ 15.541338][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.541546][ T65] copy_net_ns+0xc6/0x540 [ 15.541702][ T65] create_new_namespaces+0x35f/0x920 [ 15.541909][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 15.542119][ T65] ksys_unshare+0x2c4/0x6e0 [ 15.542331][ T65] __x64_sys_unshare+0x31/0x40 [ 15.542536][ T65] do_syscall_64+0xc1/0x1d0 [ 15.542740][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.542996][ T65] [ 15.543098][ T65] Freed by task 65: [ 15.543254][ T65] kasan_save_stack+0x24/0x50 [ 15.543465][ T65] kasan_save_track+0x14/0x30 [ 15.543667][ T65] kasan_save_free_info+0x3b/0x60 [ 15.543874][ T65] __kasan_slab_free+0x38/0x50 [ 15.544078][ T65] kmem_cache_free+0xf8/0x330 [ 15.544281][ T65] cleanup_net+0x5a8/0xb90 [ 15.544483][ T65] process_one_work+0xe55/0x16d0 [ 15.544688][ T65] worker_thread+0x58c/0xce0 [ 15.544898][ T65] kthread+0x28a/0x350 [ 15.545056][ T65] ret_from_fork+0x31/0x70 [ 15.545262][ T65] ret_from_fork_asm+0x1a/0x30 [ 15.545469][ T65] [ 15.545574][ T65] Last potentially related work creation: [ 15.545781][ T65] kasan_save_stack+0x24/0x50 [ 15.545996][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 15.546204][ T65] insert_work+0x34/0x230 [ 15.546359][ T65] __queue_work+0x5fd/0xa40 [ 15.546565][ T65] queue_delayed_work_on+0x8c/0xa0 [ 15.546773][ T65] __inet_insert_ifa+0x751/0xb10 [ 15.546980][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 15.547184][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 15.547387][ T65] netlink_rcv_skb+0x130/0x360 [ 15.547594][ T65] netlink_unicast+0x44b/0x710 [ 15.547798][ T65] netlink_sendmsg+0x723/0xbe0 [ 15.548005][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 15.548213][ T65] ___sys_sendmsg+0xee/0x170 [ 15.548424][ T65] __sys_sendmsg+0x109/0x1a0 [ 15.548630][ T65] do_syscall_64+0xc1/0x1d0 [ 15.548838][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.549098][ T65] [ 15.549202][ T65] The buggy address belongs to the object at ffff888004eb1b40 [ 15.549202][ T65] which belongs to the cache net_namespace of size 6528 [ 15.549727][ T65] The buggy address is located 184 bytes inside of [ 15.549727][ T65] freed 6528-byte region [ffff888004eb1b40, ffff888004eb34c0) [ 15.550205][ T65] [ 15.550308][ T65] The buggy address belongs to the physical page: [ 15.550561][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004eb3640 pfn:0x4eb0 [ 15.550970][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.551281][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.551536][ T65] page_type: f5(slab) [ 15.551702][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.552069][ T65] raw: ffff888004eb3640 0000000000040002 00000001f5000000 0000000000000000 [ 15.552434][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 15.552793][ T65] head: ffff888004eb3640 0000000000040002 00000001f5000000 0000000000000000 [ 15.553157][ T65] head: 0080000000000003 ffffea000013ac01 ffffffffffffffff 0000000000000000 [ 15.553527][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.553895][ T65] page dumped because: kasan: bad access detected [ 15.554150][ T65] [ 15.554256][ T65] Memory state around the buggy address: [ 15.554454][ T65] ffff888004eb1a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.554675][ T65] ffff888004eb1b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.554910][ T65] >ffff888004eb1b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.555149][ T65] ^ [ 15.555377][ T65] ffff888004eb1c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.555630][ T65] ffff888004eb1c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.555831][ T65] ================================================================== [ 15.556228][ T65] Disabling lock debugging due to kernel taint