[ 11.752408][ T289] veth0: renamed from ioam-veth-alpha [ 11.769676][ T289] ip (289) used greatest stack depth: 23952 bytes left [ 11.842978][ T290] veth0: renamed from ioam-veth-betaL [ 11.915380][ T291] veth1: renamed from ioam-veth-betaR [ 11.996483][ T292] veth0: renamed from ioam-veth-gamma [ 219.196559][ T11] ================================================================== [ 219.196777][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 219.196977][ T11] Read of size 8 at addr ffff88800b6200f8 by task kworker/u16:0/11 [ 219.197166][ T11] [ 219.197231][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 219.197420][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 219.197579][ T11] Workqueue: netns cleanup_net [ 219.197709][ T11] Call Trace: [ 219.197804][ T11] [ 219.197875][ T11] dump_stack_lvl+0x82/0xd0 [ 219.198006][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 219.198162][ T11] ? cleanup_net+0xa5d/0xb90 [ 219.198287][ T11] print_report+0xb4/0x270 [ 219.198415][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 219.198540][ T11] kasan_report+0xbd/0xf0 [ 219.198636][ T11] ? cleanup_net+0xa5d/0xb90 [ 219.198761][ T11] cleanup_net+0xa5d/0xb90 [ 219.198888][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 219.199018][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 219.199140][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 219.199267][ T11] ? lock_acquire+0x32/0xc0 [ 219.199392][ T11] ? process_one_work+0xe0b/0x16d0 [ 219.199519][ T11] process_one_work+0xe55/0x16d0 [ 219.199645][ T11] ? __pfx___lock_release+0x10/0x10 [ 219.199768][ T11] ? __pfx_process_one_work+0x10/0x10 [ 219.199898][ T11] ? assign_work+0x16c/0x240 [ 219.200024][ T11] worker_thread+0x58c/0xce0 [ 219.200151][ T11] ? __pfx_worker_thread+0x10/0x10 [ 219.200279][ T11] kthread+0x28a/0x350 [ 219.200378][ T11] ? __pfx_kthread+0x10/0x10 [ 219.200506][ T11] ret_from_fork+0x31/0x70 [ 219.200631][ T11] ? __pfx_kthread+0x10/0x10 [ 219.200757][ T11] ret_from_fork_asm+0x1a/0x30 [ 219.200889][ T11] [ 219.200984][ T11] [ 219.201048][ T11] Allocated by task 256: [ 219.201141][ T11] kasan_save_stack+0x24/0x50 [ 219.201269][ T11] kasan_save_track+0x14/0x30 [ 219.201392][ T11] __kasan_slab_alloc+0x59/0x70 [ 219.201517][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 219.201642][ T11] copy_net_ns+0xc6/0x540 [ 219.201738][ T11] create_new_namespaces+0x35f/0x920 [ 219.201864][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 219.201988][ T11] ksys_unshare+0x2c4/0x6e0 [ 219.202114][ T11] __x64_sys_unshare+0x31/0x40 [ 219.202257][ T11] do_syscall_64+0xc1/0x1d0 [ 219.202388][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 219.202550][ T11] [ 219.202614][ T11] Freed by task 11: [ 219.202710][ T11] kasan_save_stack+0x24/0x50 [ 219.202835][ T11] kasan_save_track+0x14/0x30 [ 219.202965][ T11] kasan_save_free_info+0x3b/0x60 [ 219.203091][ T11] __kasan_slab_free+0x38/0x50 [ 219.203216][ T11] kmem_cache_free+0xf8/0x330 [ 219.203339][ T11] cleanup_net+0x5a8/0xb90 [ 219.203463][ T11] process_one_work+0xe55/0x16d0 [ 219.203587][ T11] worker_thread+0x58c/0xce0 [ 219.203710][ T11] kthread+0x28a/0x350 [ 219.203803][ T11] ret_from_fork+0x31/0x70 [ 219.203926][ T11] ret_from_fork_asm+0x1a/0x30 [ 219.204065][ T11] [ 219.204129][ T11] Last potentially related work creation: [ 219.204254][ T11] kasan_save_stack+0x24/0x50 [ 219.204380][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 219.204507][ T11] insert_work+0x34/0x230 [ 219.204599][ T11] __queue_work+0x5fd/0xa40 [ 219.204724][ T11] queue_delayed_work_on+0x8c/0xa0 [ 219.204847][ T11] __inet_insert_ifa+0x751/0xb10 [ 219.204973][ T11] inetdev_event+0xb18/0xcf0 [ 219.205099][ T11] notifier_call_chain+0xcd/0x150 [ 219.205224][ T11] __dev_notify_flags+0xe6/0x250 [ 219.205348][ T11] dev_change_flags+0xec/0x160 [ 219.205474][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 219.205599][ T11] rtnl_newlink+0x6de/0xa80 [ 219.205722][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 219.205847][ T11] netlink_rcv_skb+0x130/0x360 [ 219.205974][ T11] netlink_unicast+0x44b/0x710 [ 219.206103][ T11] netlink_sendmsg+0x723/0xbe0 [ 219.206227][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 219.206352][ T11] ___sys_sendmsg+0xee/0x170 [ 219.206479][ T11] __sys_sendmsg+0x109/0x1a0 [ 219.206605][ T11] do_syscall_64+0xc1/0x1d0 [ 219.206732][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 219.206892][ T11] [ 219.206963][ T11] The buggy address belongs to the object at ffff88800b620040 [ 219.206963][ T11] which belongs to the cache net_namespace of size 6528 [ 219.207295][ T11] The buggy address is located 184 bytes inside of [ 219.207295][ T11] freed 6528-byte region [ffff88800b620040, ffff88800b6219c0) [ 219.207594][ T11] [ 219.207659][ T11] The buggy address belongs to the physical page: [ 219.207811][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xb620 [ 219.208034][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 219.208222][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 219.208380][ T11] page_type: f5(slab) [ 219.208481][ T11] raw: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 219.208704][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 219.208925][ T11] head: 0080000000000040 ffff888001975240 ffff88800197a0a8 ffff88800197a0a8 [ 219.209143][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 219.209358][ T11] head: 0080000000000003 ffffea00002d8801 ffffffffffffffff 0000000000000000 [ 219.209576][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 219.209799][ T11] page dumped because: kasan: bad access detected [ 219.209955][ T11] [ 219.210023][ T11] Memory state around the buggy address: [ 219.210146][ T11] ffff88800b61ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 219.210328][ T11] ffff88800b620000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 219.210507][ T11] >ffff88800b620080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 219.210700][ T11] ^ [ 219.210881][ T11] ffff88800b620100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 219.211063][ T11] ffff88800b620180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 219.211238][ T11] ================================================================== [ 219.211500][ T11] Disabling lock debugging due to kernel taint