[ 13.038632][ T224] TCP: tun0: Driver has suspect GRO implementation, TCP performance may be compromised. [ 15.493642][ T11] ================================================================== [ 15.493958][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 15.494179][ T11] Read of size 8 at addr ffff88800aed80f8 by task kworker/u16:0/11 [ 15.494388][ T11] [ 15.494460][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 15.494673][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 15.494859][ T11] Workqueue: netns cleanup_net [ 15.495004][ T11] Call Trace: [ 15.495110][ T11] [ 15.495187][ T11] dump_stack_lvl+0x82/0xd0 [ 15.495339][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 15.495525][ T11] ? cleanup_net+0x932/0xa40 [ 15.495665][ T11] print_report+0xb4/0x270 [ 15.495859][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 15.496014][ T11] kasan_report+0xbd/0xf0 [ 15.496137][ T11] ? cleanup_net+0x932/0xa40 [ 15.496278][ T11] cleanup_net+0x932/0xa40 [ 15.496419][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 15.496560][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 15.496695][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 15.496844][ T11] ? lock_acquire+0x32/0xc0 [ 15.496988][ T11] ? process_one_work+0xe0b/0x16d0 [ 15.497129][ T11] process_one_work+0xe55/0x16d0 [ 15.497269][ T11] ? __pfx___lock_release+0x10/0x10 [ 15.497413][ T11] ? __pfx_process_one_work+0x10/0x10 [ 15.497553][ T11] ? assign_work+0x16c/0x240 [ 15.497693][ T11] worker_thread+0x58c/0xce0 [ 15.497849][ T11] ? __pfx_worker_thread+0x10/0x10 [ 15.498023][ T11] kthread+0x28a/0x350 [ 15.498134][ T11] ? __pfx_kthread+0x10/0x10 [ 15.498273][ T11] ret_from_fork+0x31/0x70 [ 15.498421][ T11] ? __pfx_kthread+0x10/0x10 [ 15.498558][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.498713][ T11] [ 15.498819][ T11] [ 15.498895][ T11] Allocated by task 224: [ 15.499007][ T11] kasan_save_stack+0x24/0x50 [ 15.499152][ T11] kasan_save_track+0x14/0x30 [ 15.499301][ T11] __kasan_slab_alloc+0x59/0x70 [ 15.499435][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 15.499570][ T11] copy_net_ns+0xc6/0x340 [ 15.499684][ T11] create_new_namespaces+0x35f/0x920 [ 15.499828][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 15.499974][ T11] ksys_unshare+0x2a9/0x660 [ 15.500113][ T11] __x64_sys_unshare+0x31/0x40 [ 15.500252][ T11] do_syscall_64+0xc1/0x1d0 [ 15.500394][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.500569][ T11] [ 15.500638][ T11] Freed by task 11: [ 15.500745][ T11] kasan_save_stack+0x24/0x50 [ 15.500882][ T11] kasan_save_track+0x14/0x30 [ 15.501019][ T11] kasan_save_free_info+0x3b/0x60 [ 15.501176][ T11] __kasan_slab_free+0x38/0x50 [ 15.501324][ T11] kmem_cache_free+0xf8/0x330 [ 15.501466][ T11] cleanup_net+0x5a8/0xa40 [ 15.501622][ T11] process_one_work+0xe55/0x16d0 [ 15.501773][ T11] worker_thread+0x58c/0xce0 [ 15.501913][ T11] kthread+0x28a/0x350 [ 15.502016][ T11] ret_from_fork+0x31/0x70 [ 15.502153][ T11] ret_from_fork_asm+0x1a/0x30 [ 15.502316][ T11] [ 15.502409][ T11] Last potentially related work creation: [ 15.502560][ T11] kasan_save_stack+0x24/0x50 [ 15.502703][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 15.502853][ T11] insert_work+0x34/0x230 [ 15.502962][ T11] __queue_work+0x5fd/0xa40 [ 15.503106][ T11] queue_delayed_work_on+0x8c/0xa0 [ 15.503249][ T11] __inet_insert_ifa+0x751/0xb10 [ 15.503392][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 15.503537][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 15.503686][ T11] netlink_rcv_skb+0x130/0x360 [ 15.503831][ T11] netlink_unicast+0x44b/0x710 [ 15.503973][ T11] netlink_sendmsg+0x723/0xbe0 [ 15.504110][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 15.504250][ T11] ___sys_sendmsg+0xee/0x170 [ 15.504413][ T11] __sys_sendmsg+0x109/0x1a0 [ 15.504555][ T11] do_syscall_64+0xc1/0x1d0 [ 15.504695][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 15.504879][ T11] [ 15.504961][ T11] The buggy address belongs to the object at ffff88800aed8040 [ 15.504961][ T11] which belongs to the cache net_namespace of size 5696 [ 15.505341][ T11] The buggy address is located 184 bytes inside of [ 15.505341][ T11] freed 5696-byte region [ffff88800aed8040, ffff88800aed9680) [ 15.505724][ T11] [ 15.505811][ T11] The buggy address belongs to the physical page: [ 15.505976][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aedafc0 pfn:0xaed8 [ 15.506260][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 15.506482][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 15.506666][ T11] page_type: f5(slab) [ 15.506778][ T11] raw: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.507032][ T11] raw: ffff88800aedafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.507269][ T11] head: 0080000000000240 ffff88800195f240 ffff888001962088 ffff888001962088 [ 15.507529][ T11] head: ffff88800aedafc0 0000000000050002 00000001f5000000 0000000000000000 [ 15.507779][ T11] head: 0080000000000003 ffffea00002bb601 ffffffffffffffff 0000000000000000 [ 15.508022][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 15.508261][ T11] page dumped because: kasan: bad access detected [ 15.508436][ T11] [ 15.508505][ T11] Memory state around the buggy address: [ 15.508645][ T11] ffff88800aed7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 15.508851][ T11] ffff88800aed8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 15.509051][ T11] >ffff88800aed8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.509248][ T11] ^ [ 15.509441][ T11] ffff88800aed8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.509641][ T11] ffff88800aed8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 15.509839][ T11] ================================================================== [ 15.510129][ T11] Disabling lock debugging due to kernel taint