[ 11.790760][ T252] ip (252) used greatest stack depth: 23880 bytes left [ 26.821183][ T11] ================================================================== [ 26.821687][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 26.821886][ T11] Read of size 8 at addr ffff8880094580f8 by task kworker/u16:0/11 [ 26.822079][ T11] [ 26.822159][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 26.822438][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 26.822611][ T11] Workqueue: netns cleanup_net [ 26.822773][ T11] Call Trace: [ 26.822881][ T11] [ 26.822958][ T11] dump_stack_lvl+0x82/0xd0 [ 26.823103][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 26.823271][ T11] ? cleanup_net+0x932/0xa40 [ 26.823403][ T11] print_report+0xb4/0x270 [ 26.823541][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 26.823671][ T11] kasan_report+0xbd/0xf0 [ 26.823773][ T11] ? cleanup_net+0x932/0xa40 [ 26.823921][ T11] cleanup_net+0x932/0xa40 [ 26.824056][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 26.824202][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 26.824333][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 26.824469][ T11] ? lock_acquire+0x32/0xc0 [ 26.824599][ T11] ? process_one_work+0xe0b/0x16d0 [ 26.824730][ T11] process_one_work+0xe55/0x16d0 [ 26.824871][ T11] ? __pfx___lock_release+0x10/0x10 [ 26.825013][ T11] ? __pfx_process_one_work+0x10/0x10 [ 26.825148][ T11] ? assign_work+0x16c/0x240 [ 26.825286][ T11] worker_thread+0x58c/0xce0 [ 26.825421][ T11] ? __pfx_worker_thread+0x10/0x10 [ 26.825557][ T11] kthread+0x28a/0x350 [ 26.825673][ T11] ? __pfx_kthread+0x10/0x10 [ 26.825803][ T11] ret_from_fork+0x31/0x70 [ 26.825932][ T11] ? __pfx_kthread+0x10/0x10 [ 26.826063][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.826197][ T11] [ 26.826300][ T11] [ 26.826370][ T11] Allocated by task 247: [ 26.826471][ T11] kasan_save_stack+0x24/0x50 [ 26.826610][ T11] kasan_save_track+0x14/0x30 [ 26.826741][ T11] __kasan_slab_alloc+0x59/0x70 [ 26.826871][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 26.827001][ T11] copy_net_ns+0xc6/0x340 [ 26.827101][ T11] create_new_namespaces+0x35f/0x920 [ 26.827231][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 26.827361][ T11] ksys_unshare+0x2a9/0x660 [ 26.827497][ T11] __x64_sys_unshare+0x31/0x40 [ 26.827625][ T11] do_syscall_64+0xc1/0x1d0 [ 26.827755][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.827918][ T11] [ 26.827984][ T11] Freed by task 11: [ 26.828078][ T11] kasan_save_stack+0x24/0x50 [ 26.828207][ T11] kasan_save_track+0x14/0x30 [ 26.828332][ T11] kasan_save_free_info+0x3b/0x60 [ 26.828463][ T11] __kasan_slab_free+0x38/0x50 [ 26.828597][ T11] kmem_cache_free+0xf8/0x330 [ 26.828723][ T11] cleanup_net+0x5a8/0xa40 [ 26.828847][ T11] process_one_work+0xe55/0x16d0 [ 26.828992][ T11] worker_thread+0x58c/0xce0 [ 26.829125][ T11] kthread+0x28a/0x350 [ 26.829227][ T11] ret_from_fork+0x31/0x70 [ 26.829359][ T11] ret_from_fork_asm+0x1a/0x30 [ 26.829495][ T11] [ 26.829564][ T11] Last potentially related work creation: [ 26.829702][ T11] kasan_save_stack+0x24/0x50 [ 26.829836][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 26.829974][ T11] insert_work+0x34/0x230 [ 26.830075][ T11] __queue_work+0x5fd/0xa40 [ 26.830205][ T11] queue_delayed_work_on+0x8c/0xa0 [ 26.830337][ T11] __inet_insert_ifa+0x751/0xb10 [ 26.830468][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 26.830605][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 26.830741][ T11] netlink_rcv_skb+0x130/0x360 [ 26.830878][ T11] netlink_unicast+0x44b/0x710 [ 26.831008][ T11] netlink_sendmsg+0x723/0xbe0 [ 26.831140][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 26.831273][ T11] ___sys_sendmsg+0xee/0x170 [ 26.831400][ T11] __sys_sendmsg+0x109/0x1a0 [ 26.831530][ T11] do_syscall_64+0xc1/0x1d0 [ 26.831667][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.831837][ T11] [ 26.831906][ T11] Second to last potentially related work creation: [ 26.832062][ T11] kasan_save_stack+0x24/0x50 [ 26.832193][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 26.832326][ T11] insert_work+0x34/0x230 [ 26.832422][ T11] __queue_work+0x5fd/0xa40 [ 26.832550][ T11] queue_delayed_work_on+0x8c/0xa0 [ 26.832687][ T11] __inet_insert_ifa+0x751/0xb10 [ 26.832820][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 26.832950][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 26.833080][ T11] netlink_rcv_skb+0x130/0x360 [ 26.833214][ T11] netlink_unicast+0x44b/0x710 [ 26.833345][ T11] netlink_sendmsg+0x723/0xbe0 [ 26.833471][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 26.833604][ T11] ___sys_sendmsg+0xee/0x170 [ 26.833740][ T11] __sys_sendmsg+0x109/0x1a0 [ 26.833873][ T11] do_syscall_64+0xc1/0x1d0 [ 26.834005][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 26.834163][ T11] [ 26.834229][ T11] The buggy address belongs to the object at ffff888009458040 [ 26.834229][ T11] which belongs to the cache net_namespace of size 6592 [ 26.834565][ T11] The buggy address is located 184 bytes inside of [ 26.834565][ T11] freed 6592-byte region [ffff888009458040, ffff888009459a00) [ 26.834879][ T11] [ 26.834946][ T11] The buggy address belongs to the physical page: [ 26.835099][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800945b6c0 pfn:0x9458 [ 26.835355][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 26.835553][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 26.835722][ T11] page_type: f5(slab) [ 26.835829][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 26.836054][ T11] raw: ffff88800945b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 26.836281][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 26.836512][ T11] head: ffff88800945b6c0 0000000000040002 00000001f5000000 0000000000000000 [ 26.836741][ T11] head: 0080000000000003 ffffea0000251601 ffffffffffffffff 0000000000000000 [ 26.836969][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 26.837196][ T11] page dumped because: kasan: bad access detected [ 26.837356][ T11] [ 26.837421][ T11] Memory state around the buggy address: [ 26.837544][ T11] ffff888009457f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 26.837739][ T11] ffff888009458000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 26.837934][ T11] >ffff888009458080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.838118][ T11] ^ [ 26.838298][ T11] ffff888009458100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.838486][ T11] ffff888009458180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.838666][ T11] ================================================================== [ 26.838916][ T11] Disabling lock debugging due to kernel taint