[ 9.526561][ T240] ip (240) used greatest stack depth: 23952 bytes left [ 35.537173][ T729] pm_nl_ctl (729) used greatest stack depth: 22752 bytes left [ 65.690446][ T68] ================================================================== [ 65.690762][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 65.690971][ T68] Read of size 8 at addr ffff88800b5500f8 by task kworker/u16:1/68 [ 65.691162][ T68] [ 65.691229][ T68] CPU: 1 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 65.691428][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 65.691597][ T68] Workqueue: netns cleanup_net [ 65.691734][ T68] Call Trace: [ 65.691858][ T68] [ 65.691929][ T68] dump_stack_lvl+0x82/0xd0 [ 65.692071][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 65.692240][ T68] ? cleanup_net+0x932/0xa40 [ 65.692380][ T68] print_report+0xb4/0x270 [ 65.692515][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 65.692647][ T68] kasan_report+0xbd/0xf0 [ 65.692747][ T68] ? cleanup_net+0x932/0xa40 [ 65.692880][ T68] cleanup_net+0x932/0xa40 [ 65.693012][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 65.693150][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 65.693280][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 65.693411][ T68] ? lock_acquire+0x32/0xc0 [ 65.693542][ T68] ? process_one_work+0xe0b/0x16d0 [ 65.693677][ T68] process_one_work+0xe55/0x16d0 [ 65.693809][ T68] ? __pfx___lock_release+0x10/0x10 [ 65.693942][ T68] ? __pfx_process_one_work+0x10/0x10 [ 65.694077][ T68] ? assign_work+0x16c/0x240 [ 65.694210][ T68] worker_thread+0x58c/0xce0 [ 65.694341][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 65.694505][ T68] ? __pfx_worker_thread+0x10/0x10 [ 65.694637][ T68] ? __pfx_worker_thread+0x10/0x10 [ 65.694767][ T68] kthread+0x28a/0x350 [ 65.694871][ T68] ? __pfx_kthread+0x10/0x10 [ 65.695000][ T68] ret_from_fork+0x31/0x70 [ 65.695129][ T68] ? __pfx_kthread+0x10/0x10 [ 65.695261][ T68] ret_from_fork_asm+0x1a/0x30 [ 65.695397][ T68] [ 65.695497][ T68] [ 65.695563][ T68] Allocated by task 239: [ 65.695668][ T68] kasan_save_stack+0x24/0x50 [ 65.695802][ T68] kasan_save_track+0x14/0x30 [ 65.695944][ T68] __kasan_slab_alloc+0x59/0x70 [ 65.696082][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 65.696216][ T68] copy_net_ns+0xc6/0x340 [ 65.696316][ T68] create_new_namespaces+0x35f/0x920 [ 65.696447][ T68] unshare_nsproxy_namespaces+0x8d/0x130 [ 65.696576][ T68] ksys_unshare+0x2a9/0x660 [ 65.696715][ T68] __x64_sys_unshare+0x31/0x40 [ 65.696861][ T68] do_syscall_64+0xc1/0x1d0 [ 65.696995][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 65.697157][ T68] [ 65.697226][ T68] Freed by task 68: [ 65.697338][ T68] kasan_save_stack+0x24/0x50 [ 65.697480][ T68] kasan_save_track+0x14/0x30 [ 65.697622][ T68] kasan_save_free_info+0x3b/0x60 [ 65.697758][ T68] __kasan_slab_free+0x38/0x50 [ 65.697891][ T68] kmem_cache_free+0xf8/0x330 [ 65.698025][ T68] cleanup_net+0x5a8/0xa40 [ 65.698157][ T68] process_one_work+0xe55/0x16d0 [ 65.698293][ T68] worker_thread+0x58c/0xce0 [ 65.698425][ T68] kthread+0x28a/0x350 [ 65.698522][ T68] ret_from_fork+0x31/0x70 [ 65.698658][ T68] ret_from_fork_asm+0x1a/0x30 [ 65.698786][ T68] [ 65.698855][ T68] Last potentially related work creation: [ 65.699003][ T68] kasan_save_stack+0x24/0x50 [ 65.699141][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 65.699288][ T68] insert_work+0x34/0x230 [ 65.699388][ T68] __queue_work+0x5fd/0xa40 [ 65.699526][ T68] queue_delayed_work_on+0x8c/0xa0 [ 65.699663][ T68] __inet_insert_ifa+0x751/0xb10 [ 65.699803][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 65.699940][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 65.700080][ T68] netlink_rcv_skb+0x130/0x360 [ 65.700215][ T68] netlink_unicast+0x44b/0x710 [ 65.700350][ T68] netlink_sendmsg+0x723/0xbe0 [ 65.700487][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 65.700626][ T68] ___sys_sendmsg+0xee/0x170 [ 65.700763][ T68] __sys_sendmsg+0x109/0x1a0 [ 65.700899][ T68] do_syscall_64+0xc1/0x1d0 [ 65.701036][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 65.701210][ T68] [ 65.701280][ T68] Second to last potentially related work creation: [ 65.701445][ T68] kasan_save_stack+0x24/0x50 [ 65.701585][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 65.701726][ T68] insert_work+0x34/0x230 [ 65.701831][ T68] __queue_work+0x5fd/0xa40 [ 65.701966][ T68] queue_delayed_work_on+0x8c/0xa0 [ 65.702102][ T68] __inet_insert_ifa+0x751/0xb10 [ 65.702236][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 65.702371][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 65.702508][ T68] netlink_rcv_skb+0x130/0x360 [ 65.702645][ T68] netlink_unicast+0x44b/0x710 [ 65.702777][ T68] netlink_sendmsg+0x723/0xbe0 [ 65.702913][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 65.703049][ T68] ___sys_sendmsg+0xee/0x170 [ 65.703183][ T68] __sys_sendmsg+0x109/0x1a0 [ 65.703322][ T68] do_syscall_64+0xc1/0x1d0 [ 65.703459][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 65.703627][ T68] [ 65.703694][ T68] The buggy address belongs to the object at ffff88800b550040 [ 65.703694][ T68] which belongs to the cache net_namespace of size 6080 [ 65.704056][ T68] The buggy address is located 184 bytes inside of [ 65.704056][ T68] freed 6080-byte region [ffff88800b550040, ffff88800b551800) [ 65.704390][ T68] [ 65.704459][ T68] The buggy address belongs to the physical page: [ 65.704619][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b5532c0 pfn:0xb550 [ 65.704893][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 65.705089][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 65.705271][ T68] page_type: f5(slab) [ 65.705375][ T68] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 65.705620][ T68] raw: ffff88800b5532c0 0000000000050002 00000001f5000000 0000000000000000 [ 65.705854][ T68] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 65.706094][ T68] head: ffff88800b5532c0 0000000000050002 00000001f5000000 0000000000000000 [ 65.706321][ T68] head: 0080000000000003 ffffea00002d5401 ffffffffffffffff 0000000000000000 [ 65.706549][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 65.706776][ T68] page dumped because: kasan: bad access detected [ 65.706939][ T68] [ 65.707011][ T68] Memory state around the buggy address: [ 65.707141][ T68] ffff88800b54ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.707330][ T68] ffff88800b550000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 65.707518][ T68] >ffff88800b550080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.707792][ T68] ^ [ 65.707979][ T68] ffff88800b550100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.708175][ T68] ffff88800b550180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.708429][ T68] ================================================================== [ 65.708681][ T68] Disabling lock debugging due to kernel taint