[ 19.200047][ T317] ip (317) used greatest stack depth: 23112 bytes left [ 149.162541][ T66] ================================================================== [ 149.162799][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 149.163005][ T66] Read of size 8 at addr ffff88800a0400f8 by task kworker/u16:1/66 [ 149.163210][ T66] [ 149.163290][ T66] CPU: 1 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 149.163498][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 149.163670][ T66] Workqueue: netns cleanup_net [ 149.163830][ T66] Call Trace: [ 149.163934][ T66] [ 149.164013][ T66] dump_stack_lvl+0x82/0xd0 [ 149.164159][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 149.164337][ T66] ? cleanup_net+0x932/0xa40 [ 149.164481][ T66] print_report+0xb4/0x270 [ 149.164621][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 149.164756][ T66] kasan_report+0xbd/0xf0 [ 149.164865][ T66] ? cleanup_net+0x932/0xa40 [ 149.165008][ T66] cleanup_net+0x932/0xa40 [ 149.165144][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 149.165285][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 149.165421][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 149.165562][ T66] ? lock_acquire+0x32/0xc0 [ 149.165696][ T66] ? process_one_work+0xe0b/0x16d0 [ 149.165834][ T66] process_one_work+0xe55/0x16d0 [ 149.165975][ T66] ? __pfx___lock_release+0x10/0x10 [ 149.166115][ T66] ? __pfx_process_one_work+0x10/0x10 [ 149.166266][ T66] ? assign_work+0x16c/0x240 [ 149.166404][ T66] worker_thread+0x58c/0xce0 [ 149.166543][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 149.166717][ T66] ? __pfx_worker_thread+0x10/0x10 [ 149.166855][ T66] ? __pfx_worker_thread+0x10/0x10 [ 149.166990][ T66] kthread+0x28a/0x350 [ 149.167099][ T66] ? __pfx_kthread+0x10/0x10 [ 149.167239][ T66] ret_from_fork+0x31/0x70 [ 149.167377][ T66] ? __pfx_kthread+0x10/0x10 [ 149.167514][ T66] ret_from_fork_asm+0x1a/0x30 [ 149.167658][ T66] [ 149.167765][ T66] [ 149.167835][ T66] Allocated by task 263: [ 149.167942][ T66] kasan_save_stack+0x24/0x50 [ 149.168088][ T66] kasan_save_track+0x14/0x30 [ 149.168229][ T66] __kasan_slab_alloc+0x59/0x70 [ 149.168372][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 149.168512][ T66] copy_net_ns+0xc6/0x340 [ 149.168620][ T66] create_new_namespaces+0x35f/0x920 [ 149.168764][ T66] unshare_nsproxy_namespaces+0x8d/0x130 [ 149.168907][ T66] ksys_unshare+0x2a9/0x660 [ 149.169048][ T66] __x64_sys_unshare+0x31/0x40 [ 149.169190][ T66] do_syscall_64+0xc1/0x1d0 [ 149.169342][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 149.169520][ T66] [ 149.169590][ T66] Freed by task 66: [ 149.169691][ T66] kasan_save_stack+0x24/0x50 [ 149.169831][ T66] kasan_save_track+0x14/0x30 [ 149.169971][ T66] kasan_save_free_info+0x3b/0x60 [ 149.170113][ T66] __kasan_slab_free+0x38/0x50 [ 149.170247][ T66] kmem_cache_free+0xf8/0x330 [ 149.170386][ T66] cleanup_net+0x5a8/0xa40 [ 149.170525][ T66] process_one_work+0xe55/0x16d0 [ 149.170663][ T66] worker_thread+0x58c/0xce0 [ 149.170798][ T66] kthread+0x28a/0x350 [ 149.170900][ T66] ret_from_fork+0x31/0x70 [ 149.171035][ T66] ret_from_fork_asm+0x1a/0x30 [ 149.171175][ T66] [ 149.171244][ T66] Last potentially related work creation: [ 149.171383][ T66] kasan_save_stack+0x24/0x50 [ 149.171522][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 149.171663][ T66] insert_work+0x34/0x230 [ 149.171766][ T66] __queue_work+0x5fd/0xa40 [ 149.171902][ T66] queue_delayed_work_on+0x8c/0xa0 [ 149.172040][ T66] __inet_insert_ifa+0x751/0xb10 [ 149.172179][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 149.172338][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 149.172477][ T66] netlink_rcv_skb+0x130/0x360 [ 149.172611][ T66] netlink_unicast+0x44b/0x710 [ 149.172744][ T66] netlink_sendmsg+0x723/0xbe0 [ 149.172876][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 149.173007][ T66] ___sys_sendmsg+0xee/0x170 [ 149.173141][ T66] __sys_sendmsg+0x109/0x1a0 [ 149.173274][ T66] do_syscall_64+0xc1/0x1d0 [ 149.173401][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 149.173568][ T66] [ 149.173636][ T66] Second to last potentially related work creation: [ 149.173805][ T66] kasan_save_stack+0x24/0x50 [ 149.173939][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 149.174107][ T66] insert_work+0x34/0x230 [ 149.174211][ T66] __queue_work+0x5fd/0xa40 [ 149.174349][ T66] queue_delayed_work_on+0x8c/0xa0 [ 149.174493][ T66] __inet_insert_ifa+0x751/0xb10 [ 149.174629][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 149.174766][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 149.174903][ T66] netlink_rcv_skb+0x130/0x360 [ 149.175040][ T66] netlink_unicast+0x44b/0x710 [ 149.175181][ T66] netlink_sendmsg+0x723/0xbe0 [ 149.175317][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 149.175456][ T66] ___sys_sendmsg+0xee/0x170 [ 149.175592][ T66] __sys_sendmsg+0x109/0x1a0 [ 149.175738][ T66] do_syscall_64+0xc1/0x1d0 [ 149.175876][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 149.176050][ T66] [ 149.176121][ T66] The buggy address belongs to the object at ffff88800a040040 [ 149.176121][ T66] which belongs to the cache net_namespace of size 6592 [ 149.176485][ T66] The buggy address is located 184 bytes inside of [ 149.176485][ T66] freed 6592-byte region [ffff88800a040040, ffff88800a041a00) [ 149.176821][ T66] [ 149.176890][ T66] The buggy address belongs to the physical page: [ 149.177060][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xa040 [ 149.177311][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 149.177519][ T66] flags: 0x80000000000040(head|node=0|zone=1) [ 149.177702][ T66] page_type: f5(slab) [ 149.177811][ T66] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002f7810 [ 149.178059][ T66] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 149.178304][ T66] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffffea00002f7810 [ 149.178549][ T66] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 149.178799][ T66] head: 0080000000000003 ffffea0000281001 ffffffffffffffff 0000000000000000 [ 149.179042][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 149.179284][ T66] page dumped because: kasan: bad access detected [ 149.179455][ T66] [ 149.179524][ T66] Memory state around the buggy address: [ 149.179664][ T66] ffff88800a03ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 149.179866][ T66] ffff88800a040000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 149.180064][ T66] >ffff88800a040080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 149.180267][ T66] ^ [ 149.180467][ T66] ffff88800a040100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 149.180662][ T66] ffff88800a040180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 149.180860][ T66] ================================================================== [ 149.181095][ T66] Disabling lock debugging due to kernel taint