[ 26.603962][ T567] ip (567) used greatest stack depth: 23168 bytes left [ 85.722905][ T66] ================================================================== [ 85.723199][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 85.723396][ T66] Read of size 8 at addr ffff88800a3e00f8 by task kworker/u16:1/66 [ 85.723580][ T66] [ 85.723651][ T66] CPU: 3 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 85.723842][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 85.724001][ T66] Workqueue: netns cleanup_net [ 85.724145][ T66] Call Trace: [ 85.724243][ T66] [ 85.724311][ T66] dump_stack_lvl+0x82/0xd0 [ 85.724443][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 85.724604][ T66] ? cleanup_net+0xa5d/0xb90 [ 85.724734][ T66] print_report+0xb4/0x270 [ 85.724869][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 85.725000][ T66] kasan_report+0xbd/0xf0 [ 85.725098][ T66] ? cleanup_net+0xa5d/0xb90 [ 85.725233][ T66] cleanup_net+0xa5d/0xb90 [ 85.725362][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 85.725495][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 85.725627][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 85.725758][ T66] ? lock_acquire+0x32/0xc0 [ 85.725886][ T66] ? process_one_work+0xe0b/0x16d0 [ 85.726022][ T66] process_one_work+0xe55/0x16d0 [ 85.726154][ T66] ? __pfx___lock_release+0x10/0x10 [ 85.726284][ T66] ? __pfx_process_one_work+0x10/0x10 [ 85.726412][ T66] ? assign_work+0x16c/0x240 [ 85.726539][ T66] worker_thread+0x58c/0xce0 [ 85.726669][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 85.726829][ T66] ? __pfx_worker_thread+0x10/0x10 [ 85.726958][ T66] ? __pfx_worker_thread+0x10/0x10 [ 85.727087][ T66] kthread+0x28a/0x350 [ 85.727188][ T66] ? __pfx_kthread+0x10/0x10 [ 85.727319][ T66] ret_from_fork+0x31/0x70 [ 85.727451][ T66] ? __pfx_kthread+0x10/0x10 [ 85.727583][ T66] ret_from_fork_asm+0x1a/0x30 [ 85.727717][ T66] [ 85.727818][ T66] [ 85.727885][ T66] Allocated by task 517: [ 85.727982][ T66] kasan_save_stack+0x24/0x50 [ 85.728116][ T66] kasan_save_track+0x14/0x30 [ 85.728242][ T66] __kasan_slab_alloc+0x59/0x70 [ 85.728367][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 85.728498][ T66] copy_net_ns+0xc6/0x540 [ 85.728599][ T66] create_new_namespaces+0x35f/0x920 [ 85.728729][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 85.728851][ T66] ksys_unshare+0x2c4/0x6e0 [ 85.728981][ T66] __x64_sys_unshare+0x31/0x40 [ 85.729109][ T66] do_syscall_64+0xc1/0x1d0 [ 85.729240][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.729406][ T66] [ 85.729478][ T66] Freed by task 66: [ 85.729575][ T66] kasan_save_stack+0x24/0x50 [ 85.729705][ T66] kasan_save_track+0x14/0x30 [ 85.729828][ T66] kasan_save_free_info+0x3b/0x60 [ 85.729957][ T66] __kasan_slab_free+0x38/0x50 [ 85.730084][ T66] kmem_cache_free+0xf8/0x330 [ 85.730215][ T66] cleanup_net+0x5a8/0xb90 [ 85.730342][ T66] process_one_work+0xe55/0x16d0 [ 85.730469][ T66] worker_thread+0x58c/0xce0 [ 85.730596][ T66] kthread+0x28a/0x350 [ 85.730697][ T66] ret_from_fork+0x31/0x70 [ 85.730827][ T66] ret_from_fork_asm+0x1a/0x30 [ 85.730951][ T66] [ 85.731017][ T66] Last potentially related work creation: [ 85.731145][ T66] kasan_save_stack+0x24/0x50 [ 85.731274][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 85.731403][ T66] insert_work+0x34/0x230 [ 85.731499][ T66] __queue_work+0x5fd/0xa40 [ 85.731630][ T66] queue_delayed_work_on+0x8c/0xa0 [ 85.731758][ T66] __inet_insert_ifa+0x751/0xb10 [ 85.731895][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 85.732022][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 85.732152][ T66] netlink_rcv_skb+0x130/0x360 [ 85.732278][ T66] netlink_unicast+0x44b/0x710 [ 85.732410][ T66] netlink_sendmsg+0x723/0xbe0 [ 85.732541][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 85.732669][ T66] ___sys_sendmsg+0xee/0x170 [ 85.732800][ T66] __sys_sendmsg+0x109/0x1a0 [ 85.732927][ T66] do_syscall_64+0xc1/0x1d0 [ 85.733058][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.733219][ T66] [ 85.733284][ T66] Second to last potentially related work creation: [ 85.733443][ T66] kasan_save_stack+0x24/0x50 [ 85.733577][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 85.733706][ T66] insert_work+0x34/0x230 [ 85.733803][ T66] __queue_work+0x5fd/0xa40 [ 85.733933][ T66] queue_delayed_work_on+0x8c/0xa0 [ 85.734063][ T66] __inet_insert_ifa+0x751/0xb10 [ 85.734196][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 85.734325][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 85.734455][ T66] netlink_rcv_skb+0x130/0x360 [ 85.734583][ T66] netlink_unicast+0x44b/0x710 [ 85.734712][ T66] netlink_sendmsg+0x723/0xbe0 [ 85.734850][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 85.734975][ T66] ___sys_sendmsg+0xee/0x170 [ 85.735106][ T66] __sys_sendmsg+0x109/0x1a0 [ 85.735237][ T66] do_syscall_64+0xc1/0x1d0 [ 85.735363][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 85.735522][ T66] [ 85.735588][ T66] The buggy address belongs to the object at ffff88800a3e0040 [ 85.735588][ T66] which belongs to the cache net_namespace of size 6528 [ 85.735924][ T66] The buggy address is located 184 bytes inside of [ 85.735924][ T66] freed 6528-byte region [ffff88800a3e0040, ffff88800a3e19c0) [ 85.736242][ T66] [ 85.736307][ T66] The buggy address belongs to the physical page: [ 85.736461][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a3e5140 pfn:0xa3e0 [ 85.736722][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 85.736909][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 85.737076][ T66] page_type: f5(slab) [ 85.737177][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 85.737413][ T66] raw: ffff88800a3e5140 0000000000040003 00000001f5000000 0000000000000000 [ 85.737647][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 85.737879][ T66] head: ffff88800a3e5140 0000000000040003 00000001f5000000 0000000000000000 [ 85.738108][ T66] head: 0080000000000003 ffffea000028f801 ffffffffffffffff 0000000000000000 [ 85.738338][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 85.738558][ T66] page dumped because: kasan: bad access detected [ 85.738718][ T66] [ 85.738782][ T66] Memory state around the buggy address: [ 85.738906][ T66] ffff88800a3dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 85.739092][ T66] ffff88800a3e0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 85.739284][ T66] >ffff88800a3e0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.739478][ T66] ^ [ 85.739668][ T66] ffff88800a3e0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.739851][ T66] ffff88800a3e0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.740041][ T66] ================================================================== [ 85.740252][ T66] Disabling lock debugging due to kernel taint [ 132.159486][ T1653] mpls_gso: MPLS GSO support