[ 18.356702][ T372] ip_local_port_range: prefer different parity for start/end values. [ 18.759303][ T65] ================================================================== [ 18.759546][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.759761][ T65] Read of size 8 at addr ffff88800e5780f8 by task kworker/u16:1/65 [ 18.759965][ T65] [ 18.760038][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 18.760257][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.760432][ T65] Workqueue: netns cleanup_net [ 18.760579][ T65] Call Trace: [ 18.760684][ T65] [ 18.760759][ T65] dump_stack_lvl+0x82/0xd0 [ 18.760903][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 18.761079][ T65] ? cleanup_net+0xa5d/0xb90 [ 18.761216][ T65] print_report+0xb4/0x270 [ 18.761352][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 18.761498][ T65] kasan_report+0xbd/0xf0 [ 18.761607][ T65] ? cleanup_net+0xa5d/0xb90 [ 18.761744][ T65] cleanup_net+0xa5d/0xb90 [ 18.761877][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.762016][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 18.762152][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 18.762292][ T65] ? lock_acquire+0x32/0xc0 [ 18.762425][ T65] ? process_one_work+0xe0b/0x16d0 [ 18.762562][ T65] process_one_work+0xe55/0x16d0 [ 18.762700][ T65] ? __pfx___lock_release+0x10/0x10 [ 18.762834][ T65] ? __pfx_process_one_work+0x10/0x10 [ 18.762972][ T65] ? assign_work+0x16c/0x240 [ 18.763110][ T65] worker_thread+0x58c/0xce0 [ 18.763250][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 18.763422][ T65] ? __pfx_worker_thread+0x10/0x10 [ 18.763559][ T65] ? __pfx_worker_thread+0x10/0x10 [ 18.763694][ T65] kthread+0x28a/0x350 [ 18.763799][ T65] ? __pfx_kthread+0x10/0x10 [ 18.763936][ T65] ret_from_fork+0x31/0x70 [ 18.764072][ T65] ? __pfx_kthread+0x10/0x10 [ 18.764209][ T65] ret_from_fork_asm+0x1a/0x30 [ 18.764352][ T65] [ 18.764466][ T65] [ 18.764538][ T65] Allocated by task 255: [ 18.764639][ T65] kasan_save_stack+0x24/0x50 [ 18.764776][ T65] kasan_save_track+0x14/0x30 [ 18.764910][ T65] __kasan_slab_alloc+0x59/0x70 [ 18.765040][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.765177][ T65] copy_net_ns+0xc6/0x540 [ 18.765279][ T65] create_new_namespaces+0x35f/0x920 [ 18.765415][ T65] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.765550][ T65] ksys_unshare+0x2c4/0x6e0 [ 18.765684][ T65] __x64_sys_unshare+0x31/0x40 [ 18.765818][ T65] do_syscall_64+0xc1/0x1d0 [ 18.765954][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.766120][ T65] [ 18.766201][ T65] Freed by task 65: [ 18.766304][ T65] kasan_save_stack+0x24/0x50 [ 18.766443][ T65] kasan_save_track+0x14/0x30 [ 18.766580][ T65] kasan_save_free_info+0x3b/0x60 [ 18.766720][ T65] __kasan_slab_free+0x38/0x50 [ 18.766855][ T65] kmem_cache_free+0xf8/0x330 [ 18.766989][ T65] cleanup_net+0x5a8/0xb90 [ 18.767123][ T65] process_one_work+0xe55/0x16d0 [ 18.767258][ T65] worker_thread+0x58c/0xce0 [ 18.767395][ T65] kthread+0x28a/0x350 [ 18.767498][ T65] ret_from_fork+0x31/0x70 [ 18.767630][ T65] ret_from_fork_asm+0x1a/0x30 [ 18.767768][ T65] [ 18.767841][ T65] Last potentially related work creation: [ 18.767974][ T65] kasan_save_stack+0x24/0x50 [ 18.768111][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 18.768253][ T65] insert_work+0x34/0x230 [ 18.768355][ T65] __queue_work+0x5fd/0xa40 [ 18.768499][ T65] queue_delayed_work_on+0x8c/0xa0 [ 18.768634][ T65] __inet_insert_ifa+0x751/0xb10 [ 18.768790][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 18.768928][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 18.769066][ T65] netlink_rcv_skb+0x130/0x360 [ 18.769206][ T65] netlink_unicast+0x44b/0x710 [ 18.769342][ T65] netlink_sendmsg+0x723/0xbe0 [ 18.769482][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 18.769620][ T65] ___sys_sendmsg+0xee/0x170 [ 18.769760][ T65] __sys_sendmsg+0x109/0x1a0 [ 18.769902][ T65] do_syscall_64+0xc1/0x1d0 [ 18.770057][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.770253][ T65] [ 18.770326][ T65] Second to last potentially related work creation: [ 18.770504][ T65] kasan_save_stack+0x24/0x50 [ 18.770651][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 18.770788][ T65] insert_work+0x34/0x230 [ 18.770895][ T65] __queue_work+0x5fd/0xa40 [ 18.771039][ T65] queue_delayed_work_on+0x8c/0xa0 [ 18.771182][ T65] __inet_insert_ifa+0x751/0xb10 [ 18.771339][ T65] inetdev_event+0xb18/0xcf0 [ 18.771477][ T65] notifier_call_chain+0xcd/0x150 [ 18.771615][ T65] __dev_notify_flags+0xe6/0x250 [ 18.771754][ T65] dev_change_flags+0xec/0x160 [ 18.771895][ T65] do_setlink.constprop.0+0x79d/0x2300 [ 18.772039][ T65] rtnl_newlink+0x6de/0xa80 [ 18.772189][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 18.772340][ T65] netlink_rcv_skb+0x130/0x360 [ 18.772488][ T65] netlink_unicast+0x44b/0x710 [ 18.772626][ T65] netlink_sendmsg+0x723/0xbe0 [ 18.772763][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 18.772899][ T65] ___sys_sendmsg+0xee/0x170 [ 18.773052][ T65] __sys_sendmsg+0x109/0x1a0 [ 18.773189][ T65] do_syscall_64+0xc1/0x1d0 [ 18.773329][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.773501][ T65] [ 18.773573][ T65] The buggy address belongs to the object at ffff88800e578040 [ 18.773573][ T65] which belongs to the cache net_namespace of size 6528 [ 18.773941][ T65] The buggy address is located 184 bytes inside of [ 18.773941][ T65] freed 6528-byte region [ffff88800e578040, ffff88800e5799c0) [ 18.774280][ T65] [ 18.774353][ T65] The buggy address belongs to the physical page: [ 18.774531][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800e57b640 pfn:0xe578 [ 18.774807][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.775018][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.775191][ T65] page_type: f5(slab) [ 18.775301][ T65] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.775555][ T65] raw: ffff88800e57b640 0000000000040002 00000001f5000000 0000000000000000 [ 18.775798][ T65] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.776043][ T65] head: ffff88800e57b640 0000000000040002 00000001f5000000 0000000000000000 [ 18.776279][ T65] head: 0080000000000003 ffffea0000395e01 ffffffffffffffff 0000000000000000 [ 18.776525][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.776778][ T65] page dumped because: kasan: bad access detected [ 18.776947][ T65] [ 18.777015][ T65] Memory state around the buggy address: [ 18.777147][ T65] ffff88800e577f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.777344][ T65] ffff88800e578000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.777540][ T65] >ffff88800e578080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.777736][ T65] ^ [ 18.777947][ T65] ffff88800e578100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.778146][ T65] ffff88800e578180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.778350][ T65] ================================================================== [ 18.778569][ T65] Disabling lock debugging due to kernel taint