[ 12.612452][ T289] veth0: renamed from ioam-veth-alpha [ 12.710122][ T290] veth0: renamed from ioam-veth-betaL [ 12.780767][ T291] veth1: renamed from ioam-veth-betaR [ 12.864212][ T292] veth0: renamed from ioam-veth-gamma [ 99.853227][ T1257] ip (1257) used greatest stack depth: 23288 bytes left [ 225.317305][ T66] ================================================================== [ 225.317533][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 225.317733][ T66] Read of size 8 at addr ffff88800b3980f8 by task kworker/u16:1/66 [ 225.317919][ T66] [ 225.317989][ T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 225.318185][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 225.318348][ T66] Workqueue: netns cleanup_net [ 225.318482][ T66] Call Trace: [ 225.318585][ T66] [ 225.318656][ T66] dump_stack_lvl+0x82/0xd0 [ 225.318793][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 225.318959][ T66] ? cleanup_net+0xa5d/0xb90 [ 225.319089][ T66] print_report+0xb4/0x270 [ 225.319228][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 225.319362][ T66] kasan_report+0xbd/0xf0 [ 225.319460][ T66] ? cleanup_net+0xa5d/0xb90 [ 225.319591][ T66] cleanup_net+0xa5d/0xb90 [ 225.319715][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 225.319851][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 225.319983][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 225.320115][ T66] ? lock_acquire+0x32/0xc0 [ 225.320245][ T66] ? process_one_work+0xe0b/0x16d0 [ 225.320382][ T66] process_one_work+0xe55/0x16d0 [ 225.320515][ T66] ? __pfx___lock_release+0x10/0x10 [ 225.320653][ T66] ? __pfx_process_one_work+0x10/0x10 [ 225.320789][ T66] ? assign_work+0x16c/0x240 [ 225.320924][ T66] worker_thread+0x58c/0xce0 [ 225.321053][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 225.321231][ T66] ? __pfx_worker_thread+0x10/0x10 [ 225.321363][ T66] ? __pfx_worker_thread+0x10/0x10 [ 225.321502][ T66] kthread+0x28a/0x350 [ 225.321606][ T66] ? __pfx_kthread+0x10/0x10 [ 225.321737][ T66] ret_from_fork+0x31/0x70 [ 225.321869][ T66] ? __pfx_kthread+0x10/0x10 [ 225.321998][ T66] ret_from_fork_asm+0x1a/0x30 [ 225.322135][ T66] [ 225.322236][ T66] [ 225.322312][ T66] Allocated by task 257: [ 225.322410][ T66] kasan_save_stack+0x24/0x50 [ 225.322542][ T66] kasan_save_track+0x14/0x30 [ 225.322669][ T66] __kasan_slab_alloc+0x59/0x70 [ 225.322794][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 225.322931][ T66] copy_net_ns+0xc6/0x540 [ 225.323028][ T66] create_new_namespaces+0x35f/0x920 [ 225.323172][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 225.323299][ T66] ksys_unshare+0x2c4/0x6e0 [ 225.323437][ T66] __x64_sys_unshare+0x31/0x40 [ 225.323568][ T66] do_syscall_64+0xc1/0x1d0 [ 225.323704][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 225.323868][ T66] [ 225.323939][ T66] Freed by task 66: [ 225.324035][ T66] kasan_save_stack+0x24/0x50 [ 225.324167][ T66] kasan_save_track+0x14/0x30 [ 225.324295][ T66] kasan_save_free_info+0x3b/0x60 [ 225.324425][ T66] __kasan_slab_free+0x38/0x50 [ 225.324555][ T66] kmem_cache_free+0xf8/0x330 [ 225.324685][ T66] cleanup_net+0x5a8/0xb90 [ 225.324816][ T66] process_one_work+0xe55/0x16d0 [ 225.324942][ T66] worker_thread+0x58c/0xce0 [ 225.325068][ T66] kthread+0x28a/0x350 [ 225.325166][ T66] ret_from_fork+0x31/0x70 [ 225.325294][ T66] ret_from_fork_asm+0x1a/0x30 [ 225.325425][ T66] [ 225.325493][ T66] Last potentially related work creation: [ 225.325624][ T66] kasan_save_stack+0x24/0x50 [ 225.325766][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 225.325897][ T66] insert_work+0x34/0x230 [ 225.325993][ T66] __queue_work+0x5fd/0xa40 [ 225.326125][ T66] queue_delayed_work_on+0x8c/0xa0 [ 225.326256][ T66] __inet_insert_ifa+0x751/0xb10 [ 225.326392][ T66] inetdev_event+0xb18/0xcf0 [ 225.326521][ T66] notifier_call_chain+0xcd/0x150 [ 225.326648][ T66] __dev_notify_flags+0xe6/0x250 [ 225.326782][ T66] dev_change_flags+0xec/0x160 [ 225.326915][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 225.327047][ T66] rtnl_newlink+0x6de/0xa80 [ 225.327180][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 225.327311][ T66] netlink_rcv_skb+0x130/0x360 [ 225.327446][ T66] netlink_unicast+0x44b/0x710 [ 225.327574][ T66] netlink_sendmsg+0x723/0xbe0 [ 225.327701][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 225.327830][ T66] ___sys_sendmsg+0xee/0x170 [ 225.327963][ T66] __sys_sendmsg+0x109/0x1a0 [ 225.328095][ T66] do_syscall_64+0xc1/0x1d0 [ 225.328222][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 225.328385][ T66] [ 225.328453][ T66] The buggy address belongs to the object at ffff88800b398040 [ 225.328453][ T66] which belongs to the cache net_namespace of size 6528 [ 225.328803][ T66] The buggy address is located 184 bytes inside of [ 225.328803][ T66] freed 6528-byte region [ffff88800b398040, ffff88800b3999c0) [ 225.329117][ T66] [ 225.329182][ T66] The buggy address belongs to the physical page: [ 225.329345][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb398 [ 225.329574][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 225.329776][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 225.329952][ T66] page_type: f5(slab) [ 225.330056][ T66] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 225.330293][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 225.330532][ T66] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 225.330772][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 225.331000][ T66] head: 0080000000000003 ffffea00002ce601 ffffffffffffffff 0000000000000000 [ 225.331229][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 225.331454][ T66] page dumped because: kasan: bad access detected [ 225.331611][ T66] [ 225.331678][ T66] Memory state around the buggy address: [ 225.331805][ T66] ffff88800b397f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 225.331997][ T66] ffff88800b398000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 225.332179][ T66] >ffff88800b398080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 225.332366][ T66] ^ [ 225.332564][ T66] ffff88800b398100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 225.332744][ T66] ffff88800b398180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 225.332929][ T66] ================================================================== [ 225.333182][ T66] Disabling lock debugging due to kernel taint