[ 10.244386][ T254] gre: GRE over IPv4 demultiplexor driver [ 11.478665][ T278] ip_gre: GRE over IPv4 tunneling driver [ 13.063656][ T11] ================================================================== [ 13.063910][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.064138][ T11] Read of size 8 at addr ffff8880097300f8 by task kworker/u16:0/11 [ 13.064349][ T11] [ 13.064425][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.064640][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.064819][ T11] Workqueue: netns cleanup_net [ 13.064976][ T11] Call Trace: [ 13.065092][ T11] [ 13.065172][ T11] dump_stack_lvl+0x82/0xd0 [ 13.065321][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.065508][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.065654][ T11] print_report+0xb4/0x270 [ 13.065803][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.065952][ T11] kasan_report+0xbd/0xf0 [ 13.066064][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.066216][ T11] cleanup_net+0xa5d/0xb90 [ 13.066361][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.066511][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.066659][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.066809][ T11] ? lock_acquire+0x32/0xc0 [ 13.066954][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.067108][ T11] process_one_work+0xe55/0x16d0 [ 13.067267][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.067417][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.067569][ T11] ? assign_work+0x16c/0x240 [ 13.067714][ T11] worker_thread+0x58c/0xce0 [ 13.067860][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.068002][ T11] kthread+0x28a/0x350 [ 13.068112][ T11] ? __pfx_kthread+0x10/0x10 [ 13.068253][ T11] ret_from_fork+0x31/0x70 [ 13.068406][ T11] ? __pfx_kthread+0x10/0x10 [ 13.068549][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.068701][ T11] [ 13.068815][ T11] [ 13.068899][ T11] Allocated by task 267: [ 13.069007][ T11] kasan_save_stack+0x24/0x50 [ 13.069155][ T11] kasan_save_track+0x14/0x30 [ 13.069301][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.069441][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.069585][ T11] copy_net_ns+0xc6/0x540 [ 13.069693][ T11] create_new_namespaces+0x35f/0x920 [ 13.069838][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.069990][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.070140][ T11] __x64_sys_unshare+0x31/0x40 [ 13.070289][ T11] do_syscall_64+0xc1/0x1d0 [ 13.070432][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.070617][ T11] [ 13.070691][ T11] Freed by task 11: [ 13.070801][ T11] kasan_save_stack+0x24/0x50 [ 13.070950][ T11] kasan_save_track+0x14/0x30 [ 13.071101][ T11] kasan_save_free_info+0x3b/0x60 [ 13.071248][ T11] __kasan_slab_free+0x38/0x50 [ 13.071388][ T11] kmem_cache_free+0xf8/0x330 [ 13.071531][ T11] cleanup_net+0x5a8/0xb90 [ 13.071673][ T11] process_one_work+0xe55/0x16d0 [ 13.071814][ T11] worker_thread+0x58c/0xce0 [ 13.071955][ T11] kthread+0x28a/0x350 [ 13.072065][ T11] ret_from_fork+0x31/0x70 [ 13.072207][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.072353][ T11] [ 13.072427][ T11] Last potentially related work creation: [ 13.072567][ T11] kasan_save_stack+0x24/0x50 [ 13.072710][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.072853][ T11] insert_work+0x34/0x230 [ 13.072955][ T11] __queue_work+0x5fd/0xa40 [ 13.073101][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.073248][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.073394][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.073541][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.073685][ T11] netlink_rcv_skb+0x130/0x360 [ 13.073831][ T11] netlink_unicast+0x44b/0x710 [ 13.073974][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.074120][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.074268][ T11] ___sys_sendmsg+0xee/0x170 [ 13.074415][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.074562][ T11] do_syscall_64+0xc1/0x1d0 [ 13.074704][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.074883][ T11] [ 13.074957][ T11] Second to last potentially related work creation: [ 13.075131][ T11] kasan_save_stack+0x24/0x50 [ 13.075278][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.075422][ T11] insert_work+0x34/0x230 [ 13.075534][ T11] __queue_work+0x5fd/0xa40 [ 13.075676][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.075823][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.075967][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.076109][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.076254][ T11] netlink_rcv_skb+0x130/0x360 [ 13.076394][ T11] netlink_unicast+0x44b/0x710 [ 13.076541][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.076689][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.076830][ T11] ___sys_sendmsg+0xee/0x170 [ 13.076974][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.077115][ T11] do_syscall_64+0xc1/0x1d0 [ 13.077263][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.077439][ T11] [ 13.077513][ T11] The buggy address belongs to the object at ffff888009730040 [ 13.077513][ T11] which belongs to the cache net_namespace of size 6528 [ 13.077897][ T11] The buggy address is located 184 bytes inside of [ 13.077897][ T11] freed 6528-byte region [ffff888009730040, ffff8880097319c0) [ 13.078241][ T11] [ 13.078315][ T11] The buggy address belongs to the physical page: [ 13.078491][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009733640 pfn:0x9730 [ 13.078781][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.078991][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.079168][ T11] page_type: f5(slab) [ 13.079279][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.079531][ T11] raw: ffff888009733640 0000000000040002 00000001f5000000 0000000000000000 [ 13.079780][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.080031][ T11] head: ffff888009733640 0000000000040002 00000001f5000000 0000000000000000 [ 13.080283][ T11] head: 0080000000000003 ffffea000025cc01 ffffffffffffffff 0000000000000000 [ 13.080538][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.080795][ T11] page dumped because: kasan: bad access detected [ 13.080975][ T11] [ 13.081049][ T11] Memory state around the buggy address: [ 13.081191][ T11] ffff88800972ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.081401][ T11] ffff888009730000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.081603][ T11] >ffff888009730080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.081816][ T11] ^ [ 13.082020][ T11] ffff888009730100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.082224][ T11] ffff888009730180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.082430][ T11] ================================================================== [ 13.082661][ T11] Disabling lock debugging due to kernel taint [ 39.439134][ T852] ip6_gre: GRE over IPv6 tunneling driver [ 46.512729][ T9] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 48.233688][ T55] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 50.345693][ T55] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 54.506969][ T50] ip6_tunnel: tep1 xmit: Local address not yet configured! [ 58.090690][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 61.225725][ C1] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 64.169695][ C2] ip6_tunnel: tep0 xmit: Local address not yet configured! [ 67.945739][ C3] ip6_tunnel: tep0 xmit: Local address not yet configured!