[ 11.784798][ T272] ip (272) used greatest stack depth: 24448 bytes left [ 52.849336][ T67] ================================================================== [ 52.849571][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 52.849780][ T67] Read of size 8 at addr ffff88800a7400f8 by task kworker/u16:1/67 [ 52.849977][ T67] [ 52.850048][ T67] CPU: 0 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 52.850263][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 52.850434][ T67] Workqueue: netns cleanup_net [ 52.850580][ T67] Call Trace: [ 52.850686][ T67] [ 52.850758][ T67] dump_stack_lvl+0x82/0xd0 [ 52.850903][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 52.851076][ T67] ? cleanup_net+0x932/0xa40 [ 52.851217][ T67] print_report+0xb4/0x270 [ 52.851356][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 52.851494][ T67] kasan_report+0xbd/0xf0 [ 52.851597][ T67] ? cleanup_net+0x932/0xa40 [ 52.851734][ T67] cleanup_net+0x932/0xa40 [ 52.851877][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 52.852016][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 52.852151][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 52.852287][ T67] ? lock_acquire+0x32/0xc0 [ 52.852423][ T67] ? process_one_work+0xe0b/0x16d0 [ 52.852560][ T67] process_one_work+0xe55/0x16d0 [ 52.852698][ T67] ? __pfx___lock_release+0x10/0x10 [ 52.852837][ T67] ? __pfx_process_one_work+0x10/0x10 [ 52.852977][ T67] ? assign_work+0x16c/0x240 [ 52.853116][ T67] worker_thread+0x58c/0xce0 [ 52.853254][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 52.853425][ T67] ? __pfx_worker_thread+0x10/0x10 [ 52.853562][ T67] ? __pfx_worker_thread+0x10/0x10 [ 52.853699][ T67] kthread+0x28a/0x350 [ 52.853802][ T67] ? __pfx_kthread+0x10/0x10 [ 52.853942][ T67] ret_from_fork+0x31/0x70 [ 52.854078][ T67] ? __pfx_kthread+0x10/0x10 [ 52.854216][ T67] ret_from_fork_asm+0x1a/0x30 [ 52.854357][ T67] [ 52.854464][ T67] [ 52.854534][ T67] Allocated by task 244: [ 52.854640][ T67] kasan_save_stack+0x24/0x50 [ 52.854777][ T67] kasan_save_track+0x14/0x30 [ 52.854912][ T67] __kasan_slab_alloc+0x59/0x70 [ 52.855048][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 52.855185][ T67] copy_net_ns+0xc6/0x340 [ 52.855289][ T67] create_new_namespaces+0x35f/0x920 [ 52.855429][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 52.855563][ T67] ksys_unshare+0x2a9/0x660 [ 52.855698][ T67] __x64_sys_unshare+0x31/0x40 [ 52.855832][ T67] do_syscall_64+0xc1/0x1d0 [ 52.855967][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.856138][ T67] [ 52.856208][ T67] Freed by task 67: [ 52.856311][ T67] kasan_save_stack+0x24/0x50 [ 52.856446][ T67] kasan_save_track+0x14/0x30 [ 52.856582][ T67] kasan_save_free_info+0x3b/0x60 [ 52.856719][ T67] __kasan_slab_free+0x38/0x50 [ 52.856854][ T67] kmem_cache_free+0xf8/0x330 [ 52.856989][ T67] cleanup_net+0x5a8/0xa40 [ 52.857127][ T67] process_one_work+0xe55/0x16d0 [ 52.857262][ T67] worker_thread+0x58c/0xce0 [ 52.857396][ T67] kthread+0x28a/0x350 [ 52.857498][ T67] ret_from_fork+0x31/0x70 [ 52.857633][ T67] ret_from_fork_asm+0x1a/0x30 [ 52.857769][ T67] [ 52.857839][ T67] Last potentially related work creation: [ 52.857973][ T67] kasan_save_stack+0x24/0x50 [ 52.858110][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 52.858248][ T67] insert_work+0x34/0x230 [ 52.858351][ T67] __queue_work+0x5fd/0xa40 [ 52.858486][ T67] queue_delayed_work_on+0x8c/0xa0 [ 52.858620][ T67] __inet_insert_ifa+0x751/0xb10 [ 52.858758][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 52.858894][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 52.859029][ T67] netlink_rcv_skb+0x130/0x360 [ 52.859168][ T67] netlink_unicast+0x44b/0x710 [ 52.859317][ T67] netlink_sendmsg+0x723/0xbe0 [ 52.859453][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 52.859589][ T67] ___sys_sendmsg+0xee/0x170 [ 52.859727][ T67] __sys_sendmsg+0x109/0x1a0 [ 52.859860][ T67] do_syscall_64+0xc1/0x1d0 [ 52.859997][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.860166][ T67] [ 52.860235][ T67] Second to last potentially related work creation: [ 52.860402][ T67] kasan_save_stack+0x24/0x50 [ 52.860542][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 52.860678][ T67] insert_work+0x34/0x230 [ 52.860781][ T67] __queue_work+0x5fd/0xa40 [ 52.860919][ T67] queue_delayed_work_on+0x8c/0xa0 [ 52.861057][ T67] __inet_insert_ifa+0x751/0xb10 [ 52.861194][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 52.861331][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 52.861470][ T67] netlink_rcv_skb+0x130/0x360 [ 52.861608][ T67] netlink_unicast+0x44b/0x710 [ 52.861745][ T67] netlink_sendmsg+0x723/0xbe0 [ 52.861886][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 52.862045][ T67] ___sys_sendmsg+0xee/0x170 [ 52.862182][ T67] __sys_sendmsg+0x109/0x1a0 [ 52.862320][ T67] do_syscall_64+0xc1/0x1d0 [ 52.862458][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 52.862633][ T67] [ 52.862701][ T67] The buggy address belongs to the object at ffff88800a740040 [ 52.862701][ T67] which belongs to the cache net_namespace of size 6080 [ 52.863057][ T67] The buggy address is located 184 bytes inside of [ 52.863057][ T67] freed 6080-byte region [ffff88800a740040, ffff88800a741800) [ 52.863384][ T67] [ 52.863457][ T67] The buggy address belongs to the physical page: [ 52.863623][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a744c00 pfn:0xa740 [ 52.863904][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 52.864106][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 52.864281][ T67] page_type: f5(slab) [ 52.864454][ T67] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.864692][ T67] raw: ffff88800a744c00 0000000000050003 00000001f5000000 0000000000000000 [ 52.864934][ T67] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 52.865170][ T67] head: ffff88800a744c00 0000000000050003 00000001f5000000 0000000000000000 [ 52.865407][ T67] head: 0080000000000003 ffffea000029d001 ffffffffffffffff 0000000000000000 [ 52.865718][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 52.865955][ T67] page dumped because: kasan: bad access detected [ 52.866120][ T67] [ 52.866189][ T67] Memory state around the buggy address: [ 52.866321][ T67] ffff88800a73ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.866522][ T67] ffff88800a740000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 52.866838][ T67] >ffff88800a740080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.867035][ T67] ^ [ 52.867233][ T67] ffff88800a740100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.867430][ T67] ffff88800a740180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.867626][ T67] ================================================================== [ 52.867843][ T67] Disabling lock debugging due to kernel taint