[ 14.133819][ T278] ip (278) used greatest stack depth: 23696 bytes left [ 23.371594][ T11] ================================================================== [ 23.371836][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 23.372046][ T11] Read of size 8 at addr ffff88800b1d80f8 by task kworker/u16:0/11 [ 23.372248][ T11] [ 23.372322][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 23.372536][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 23.372709][ T11] Workqueue: netns cleanup_net [ 23.372852][ T11] Call Trace: [ 23.372958][ T11] [ 23.373029][ T11] dump_stack_lvl+0x82/0xd0 [ 23.373172][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 23.373344][ T11] ? cleanup_net+0x932/0xa40 [ 23.373481][ T11] print_report+0xb4/0x270 [ 23.373620][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 23.373756][ T11] kasan_report+0xbd/0xf0 [ 23.373860][ T11] ? cleanup_net+0x932/0xa40 [ 23.373998][ T11] cleanup_net+0x932/0xa40 [ 23.374131][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 23.374275][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 23.374415][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 23.374558][ T11] ? lock_acquire+0x32/0xc0 [ 23.374694][ T11] ? process_one_work+0xe0b/0x16d0 [ 23.374836][ T11] process_one_work+0xe55/0x16d0 [ 23.374973][ T11] ? __pfx___lock_release+0x10/0x10 [ 23.375109][ T11] ? __pfx_process_one_work+0x10/0x10 [ 23.375246][ T11] ? assign_work+0x16c/0x240 [ 23.375385][ T11] worker_thread+0x58c/0xce0 [ 23.375525][ T11] ? __pfx_worker_thread+0x10/0x10 [ 23.375660][ T11] kthread+0x28a/0x350 [ 23.375765][ T11] ? __pfx_kthread+0x10/0x10 [ 23.375905][ T11] ret_from_fork+0x31/0x70 [ 23.376047][ T11] ? __pfx_kthread+0x10/0x10 [ 23.376185][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.376329][ T11] [ 23.376432][ T11] [ 23.376506][ T11] Allocated by task 250: [ 23.376610][ T11] kasan_save_stack+0x24/0x50 [ 23.376748][ T11] kasan_save_track+0x14/0x30 [ 23.376881][ T11] __kasan_slab_alloc+0x59/0x70 [ 23.377017][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 23.377155][ T11] copy_net_ns+0xc6/0x340 [ 23.377261][ T11] create_new_namespaces+0x35f/0x920 [ 23.377400][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 23.377538][ T11] ksys_unshare+0x2a9/0x660 [ 23.377679][ T11] __x64_sys_unshare+0x31/0x40 [ 23.377816][ T11] do_syscall_64+0xc1/0x1d0 [ 23.377956][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.378131][ T11] [ 23.378202][ T11] Freed by task 11: [ 23.378304][ T11] kasan_save_stack+0x24/0x50 [ 23.378441][ T11] kasan_save_track+0x14/0x30 [ 23.378574][ T11] kasan_save_free_info+0x3b/0x60 [ 23.378714][ T11] __kasan_slab_free+0x38/0x50 [ 23.378846][ T11] kmem_cache_free+0xf8/0x330 [ 23.378982][ T11] cleanup_net+0x5a8/0xa40 [ 23.379123][ T11] process_one_work+0xe55/0x16d0 [ 23.379261][ T11] worker_thread+0x58c/0xce0 [ 23.379404][ T11] kthread+0x28a/0x350 [ 23.379506][ T11] ret_from_fork+0x31/0x70 [ 23.379642][ T11] ret_from_fork_asm+0x1a/0x30 [ 23.379778][ T11] [ 23.379847][ T11] Last potentially related work creation: [ 23.379983][ T11] kasan_save_stack+0x24/0x50 [ 23.380121][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 23.380265][ T11] insert_work+0x34/0x230 [ 23.380369][ T11] __queue_work+0x5fd/0xa40 [ 23.380505][ T11] queue_delayed_work_on+0x8c/0xa0 [ 23.380642][ T11] __inet_insert_ifa+0x751/0xb10 [ 23.380784][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 23.380916][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 23.381054][ T11] netlink_rcv_skb+0x130/0x360 [ 23.381195][ T11] netlink_unicast+0x44b/0x710 [ 23.381333][ T11] netlink_sendmsg+0x723/0xbe0 [ 23.381472][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 23.381613][ T11] ___sys_sendmsg+0xee/0x170 [ 23.381749][ T11] __sys_sendmsg+0x109/0x1a0 [ 23.381884][ T11] do_syscall_64+0xc1/0x1d0 [ 23.382024][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.382196][ T11] [ 23.382265][ T11] Second to last potentially related work creation: [ 23.382432][ T11] kasan_save_stack+0x24/0x50 [ 23.382571][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 23.382710][ T11] insert_work+0x34/0x230 [ 23.382815][ T11] __queue_work+0x5fd/0xa40 [ 23.382943][ T11] queue_delayed_work_on+0x8c/0xa0 [ 23.383082][ T11] __inet_insert_ifa+0x751/0xb10 [ 23.383219][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 23.383361][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 23.383496][ T11] netlink_rcv_skb+0x130/0x360 [ 23.383633][ T11] netlink_unicast+0x44b/0x710 [ 23.383769][ T11] netlink_sendmsg+0x723/0xbe0 [ 23.383904][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 23.384040][ T11] ___sys_sendmsg+0xee/0x170 [ 23.384175][ T11] __sys_sendmsg+0x109/0x1a0 [ 23.384310][ T11] do_syscall_64+0xc1/0x1d0 [ 23.384450][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 23.384618][ T11] [ 23.384687][ T11] The buggy address belongs to the object at ffff88800b1d8040 [ 23.384687][ T11] which belongs to the cache net_namespace of size 6592 [ 23.385044][ T11] The buggy address is located 184 bytes inside of [ 23.385044][ T11] freed 6592-byte region [ffff88800b1d8040, ffff88800b1d9a00) [ 23.385376][ T11] [ 23.385443][ T11] The buggy address belongs to the physical page: [ 23.385611][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b1dd200 pfn:0xb1d8 [ 23.385884][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 23.386089][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 23.386270][ T11] page_type: f5(slab) [ 23.386377][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 23.386619][ T11] raw: ffff88800b1dd200 0000000000040003 00000001f5000000 0000000000000000 [ 23.386859][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 23.387099][ T11] head: ffff88800b1dd200 0000000000040003 00000001f5000000 0000000000000000 [ 23.387339][ T11] head: 0080000000000003 ffffea00002c7601 ffffffffffffffff 0000000000000000 [ 23.387575][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 23.387812][ T11] page dumped because: kasan: bad access detected [ 23.387980][ T11] [ 23.388049][ T11] Memory state around the buggy address: [ 23.388186][ T11] ffff88800b1d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.388383][ T11] ffff88800b1d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.388582][ T11] >ffff88800b1d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.388773][ T11] ^ [ 23.388970][ T11] ffff88800b1d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.389169][ T11] ffff88800b1d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.389368][ T11] ================================================================== [ 23.389582][ T11] Disabling lock debugging due to kernel taint