[ 10.163906][ T256] gre: GRE over IPv4 demultiplexor driver [ 10.746964][ T271] ip (271) used greatest stack depth: 23912 bytes left [ 11.387476][ T280] ip_gre: GRE over IPv4 tunneling driver [ 12.937917][ T67] ================================================================== [ 12.938247][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.938466][ T67] Read of size 8 at addr ffff88800cfa80f8 by task kworker/u16:1/67 [ 12.938667][ T67] [ 12.938740][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 12.938955][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.939132][ T67] Workqueue: netns cleanup_net [ 12.939280][ T67] Call Trace: [ 12.939393][ T67] [ 12.939468][ T67] dump_stack_lvl+0x82/0xd0 [ 12.939616][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 12.939797][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.939944][ T67] print_report+0xb4/0x270 [ 12.940088][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 12.940228][ T67] kasan_report+0xbd/0xf0 [ 12.940338][ T67] ? cleanup_net+0xa5d/0xb90 [ 12.940482][ T67] cleanup_net+0xa5d/0xb90 [ 12.940618][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.940765][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 12.940905][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 12.941051][ T67] ? lock_acquire+0x32/0xc0 [ 12.941194][ T67] ? process_one_work+0xe0b/0x16d0 [ 12.941345][ T67] process_one_work+0xe55/0x16d0 [ 12.941493][ T67] ? __pfx___lock_release+0x10/0x10 [ 12.941636][ T67] ? __pfx_process_one_work+0x10/0x10 [ 12.941784][ T67] ? assign_work+0x16c/0x240 [ 12.941927][ T67] worker_thread+0x58c/0xce0 [ 12.942069][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 12.942247][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.942393][ T67] ? __pfx_worker_thread+0x10/0x10 [ 12.942535][ T67] kthread+0x28a/0x350 [ 12.942643][ T67] ? __pfx_kthread+0x10/0x10 [ 12.942785][ T67] ret_from_fork+0x31/0x70 [ 12.942927][ T67] ? __pfx_kthread+0x10/0x10 [ 12.943068][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.943217][ T67] [ 12.943324][ T67] [ 12.943396][ T67] Allocated by task 269: [ 12.943500][ T67] kasan_save_stack+0x24/0x50 [ 12.943648][ T67] kasan_save_track+0x14/0x30 [ 12.943787][ T67] __kasan_slab_alloc+0x59/0x70 [ 12.943929][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.944074][ T67] copy_net_ns+0xc6/0x540 [ 12.944180][ T67] create_new_namespaces+0x35f/0x920 [ 12.944329][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.944475][ T67] ksys_unshare+0x2c4/0x6e0 [ 12.944623][ T67] __x64_sys_unshare+0x31/0x40 [ 12.944769][ T67] do_syscall_64+0xc1/0x1d0 [ 12.944914][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.945089][ T67] [ 12.945161][ T67] Freed by task 67: [ 12.945264][ T67] kasan_save_stack+0x24/0x50 [ 12.945409][ T67] kasan_save_track+0x14/0x30 [ 12.945548][ T67] kasan_save_free_info+0x3b/0x60 [ 12.945690][ T67] __kasan_slab_free+0x38/0x50 [ 12.945828][ T67] kmem_cache_free+0xf8/0x330 [ 12.945968][ T67] cleanup_net+0x5a8/0xb90 [ 12.946107][ T67] process_one_work+0xe55/0x16d0 [ 12.946246][ T67] worker_thread+0x58c/0xce0 [ 12.946384][ T67] kthread+0x28a/0x350 [ 12.946491][ T67] ret_from_fork+0x31/0x70 [ 12.946631][ T67] ret_from_fork_asm+0x1a/0x30 [ 12.946774][ T67] [ 12.946845][ T67] Last potentially related work creation: [ 12.946986][ T67] kasan_save_stack+0x24/0x50 [ 12.947127][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.947279][ T67] insert_work+0x34/0x230 [ 12.947386][ T67] __queue_work+0x5fd/0xa40 [ 12.947524][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.947668][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.947812][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 12.947967][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.948110][ T67] netlink_rcv_skb+0x130/0x360 [ 12.948251][ T67] netlink_unicast+0x44b/0x710 [ 12.948391][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.948531][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.948670][ T67] ___sys_sendmsg+0xee/0x170 [ 12.948811][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.948956][ T67] do_syscall_64+0xc1/0x1d0 [ 12.949095][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.949270][ T67] [ 12.949343][ T67] Second to last potentially related work creation: [ 12.949513][ T67] kasan_save_stack+0x24/0x50 [ 12.949655][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 12.949795][ T67] insert_work+0x34/0x230 [ 12.949905][ T67] __queue_work+0x5fd/0xa40 [ 12.950046][ T67] queue_delayed_work_on+0x8c/0xa0 [ 12.950186][ T67] __inet_insert_ifa+0x751/0xb10 [ 12.950326][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 12.950468][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 12.950607][ T67] netlink_rcv_skb+0x130/0x360 [ 12.950746][ T67] netlink_unicast+0x44b/0x710 [ 12.950886][ T67] netlink_sendmsg+0x723/0xbe0 [ 12.951038][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 12.951189][ T67] ___sys_sendmsg+0xee/0x170 [ 12.951329][ T67] __sys_sendmsg+0x109/0x1a0 [ 12.951469][ T67] do_syscall_64+0xc1/0x1d0 [ 12.951610][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.951783][ T67] [ 12.951855][ T67] The buggy address belongs to the object at ffff88800cfa8040 [ 12.951855][ T67] which belongs to the cache net_namespace of size 6528 [ 12.952232][ T67] The buggy address is located 184 bytes inside of [ 12.952232][ T67] freed 6528-byte region [ffff88800cfa8040, ffff88800cfa99c0) [ 12.952577][ T67] [ 12.952647][ T67] The buggy address belongs to the physical page: [ 12.952821][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800cfab640 pfn:0xcfa8 [ 12.953102][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.953319][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.953498][ T67] page_type: f5(slab) [ 12.953612][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.953871][ T67] raw: ffff88800cfab640 0000000000040002 00000001f5000000 0000000000000000 [ 12.954121][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.954381][ T67] head: ffff88800cfab640 0000000000040002 00000001f5000000 0000000000000000 [ 12.954628][ T67] head: 0080000000000003 ffffea000033ea01 ffffffffffffffff 0000000000000000 [ 12.954867][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.955124][ T67] page dumped because: kasan: bad access detected [ 12.955296][ T67] [ 12.955364][ T67] Memory state around the buggy address: [ 12.955504][ T67] ffff88800cfa7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.955707][ T67] ffff88800cfa8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.955905][ T67] >ffff88800cfa8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.956111][ T67] ^ [ 12.956313][ T67] ffff88800cfa8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.956512][ T67] ffff88800cfa8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.956708][ T67] ================================================================== [ 12.956971][ T67] Disabling lock debugging due to kernel taint [ 38.889397][ T854] ip6_gre: GRE over IPv6 tunneling driver [ 51.562533][ T35] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 57.002204][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 60.075253][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 62.763214][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 66.026233][ C0] ip6_tunnel: tep0 xmit: Local address not yet configured!