[ 13.778199][ T251] tun: Universal TUN/TAP device driver, 1.6 [ 19.225720][ T68] ================================================================== [ 19.225982][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 19.226220][ T68] Read of size 8 at addr ffff8880024c80f8 by task kworker/u16:1/68 [ 19.226440][ T68] [ 19.226533][ T68] CPU: 2 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 19.226780][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 19.226959][ T68] Workqueue: netns cleanup_net [ 19.227116][ T68] Call Trace: [ 19.227223][ T68] [ 19.227299][ T68] dump_stack_lvl+0x82/0xd0 [ 19.227449][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 19.227636][ T68] ? cleanup_net+0x932/0xa40 [ 19.227786][ T68] print_report+0xb4/0x270 [ 19.227932][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 19.228080][ T68] kasan_report+0xbd/0xf0 [ 19.228196][ T68] ? cleanup_net+0x932/0xa40 [ 19.228335][ T68] cleanup_net+0x932/0xa40 [ 19.228483][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 19.228627][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 19.228766][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 19.228927][ T68] ? lock_acquire+0x32/0xc0 [ 19.229076][ T68] ? process_one_work+0xe0b/0x16d0 [ 19.229228][ T68] process_one_work+0xe55/0x16d0 [ 19.229380][ T68] ? __pfx___lock_release+0x10/0x10 [ 19.229527][ T68] ? __pfx_process_one_work+0x10/0x10 [ 19.229676][ T68] ? assign_work+0x16c/0x240 [ 19.229828][ T68] worker_thread+0x58c/0xce0 [ 19.229984][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 19.230184][ T68] ? __pfx_worker_thread+0x10/0x10 [ 19.230334][ T68] ? __pfx_worker_thread+0x10/0x10 [ 19.230485][ T68] kthread+0x28a/0x350 [ 19.230598][ T68] ? __pfx_kthread+0x10/0x10 [ 19.230746][ T68] ret_from_fork+0x31/0x70 [ 19.230899][ T68] ? __pfx_kthread+0x10/0x10 [ 19.231041][ T68] ret_from_fork_asm+0x1a/0x30 [ 19.231191][ T68] [ 19.231297][ T68] [ 19.231376][ T68] Allocated by task 258: [ 19.231486][ T68] kasan_save_stack+0x24/0x50 [ 19.231630][ T68] kasan_save_track+0x14/0x30 [ 19.231776][ T68] __kasan_slab_alloc+0x59/0x70 [ 19.231921][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 19.232065][ T68] copy_net_ns+0xc6/0x340 [ 19.232180][ T68] create_new_namespaces+0x35f/0x920 [ 19.232322][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 19.232467][ T68] ksys_unshare+0x2a9/0x660 [ 19.232611][ T68] __x64_sys_unshare+0x31/0x40 [ 19.232748][ T68] do_syscall_64+0xc1/0x1d0 [ 19.232895][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.233074][ T68] [ 19.233145][ T68] Freed by task 68: [ 19.233261][ T68] kasan_save_stack+0x24/0x50 [ 19.233404][ T68] kasan_save_track+0x14/0x30 [ 19.233544][ T68] kasan_save_free_info+0x3b/0x60 [ 19.233692][ T68] __kasan_slab_free+0x38/0x50 [ 19.233839][ T68] kmem_cache_free+0xf8/0x330 [ 19.233981][ T68] cleanup_net+0x5a8/0xa40 [ 19.234137][ T68] process_one_work+0xe55/0x16d0 [ 19.234284][ T68] worker_thread+0x58c/0xce0 [ 19.234432][ T68] kthread+0x28a/0x350 [ 19.234537][ T68] ret_from_fork+0x31/0x70 [ 19.234700][ T68] ret_from_fork_asm+0x1a/0x30 [ 19.234858][ T68] [ 19.234964][ T68] Last potentially related work creation: [ 19.235153][ T68] kasan_save_stack+0x24/0x50 [ 19.235348][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 19.235501][ T68] insert_work+0x34/0x230 [ 19.235669][ T68] __queue_work+0x5fd/0xa40 [ 19.235823][ T68] queue_delayed_work_on+0x8c/0xa0 [ 19.236018][ T68] __inet_insert_ifa+0x751/0xb10 [ 19.236180][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 19.236339][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 19.236483][ T68] netlink_rcv_skb+0x130/0x360 [ 19.236634][ T68] netlink_unicast+0x44b/0x710 [ 19.236802][ T68] netlink_sendmsg+0x723/0xbe0 [ 19.236977][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 19.237178][ T68] ___sys_sendmsg+0xee/0x170 [ 19.237365][ T68] __sys_sendmsg+0x109/0x1a0 [ 19.237549][ T68] do_syscall_64+0xc1/0x1d0 [ 19.237730][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 19.237989][ T68] [ 19.238062][ T68] The buggy address belongs to the object at ffff8880024c8040 [ 19.238062][ T68] which belongs to the cache net_namespace of size 6592 [ 19.238546][ T68] The buggy address is located 184 bytes inside of [ 19.238546][ T68] freed 6592-byte region [ffff8880024c8040, ffff8880024c9a00) [ 19.238898][ T68] [ 19.238968][ T68] The buggy address belongs to the physical page: [ 19.239150][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880024cb6c0 pfn:0x24c8 [ 19.239452][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 19.239668][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 19.239855][ T68] page_type: f5(slab) [ 19.239964][ T68] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.240235][ T68] raw: ffff8880024cb6c0 0000000000040002 00000001f5000000 0000000000000000 [ 19.240540][ T68] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 19.240798][ T68] head: ffff8880024cb6c0 0000000000040002 00000001f5000000 0000000000000000 [ 19.241079][ T68] head: 0080000000000003 ffffea0000093201 ffffffffffffffff 0000000000000000 [ 19.241349][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 19.241631][ T68] page dumped because: kasan: bad access detected [ 19.241839][ T68] [ 19.241912][ T68] Memory state around the buggy address: [ 19.242094][ T68] ffff8880024c7f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 19.242321][ T68] ffff8880024c8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 19.242568][ T68] >ffff8880024c8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.242827][ T68] ^ [ 19.243083][ T68] ffff8880024c8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.243358][ T68] ffff8880024c8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 19.243626][ T68] ================================================================== [ 19.243996][ T68] Disabling lock debugging due to kernel taint