[ 16.085940][ T279] ip (279) used greatest stack depth: 23600 bytes left [ 22.832425][ T67] ================================================================== [ 22.832720][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 22.832918][ T67] Read of size 8 at addr ffff88800b5500f8 by task kworker/u16:1/67 [ 22.833102][ T67] [ 22.833170][ T67] CPU: 1 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 22.833363][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 22.833529][ T67] Workqueue: netns cleanup_net [ 22.833661][ T67] Call Trace: [ 22.833762][ T67] [ 22.833830][ T67] dump_stack_lvl+0x82/0xd0 [ 22.833964][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 22.834121][ T67] ? cleanup_net+0xa5d/0xb90 [ 22.834248][ T67] print_report+0xb4/0x270 [ 22.834378][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 22.834505][ T67] kasan_report+0xbd/0xf0 [ 22.834600][ T67] ? cleanup_net+0xa5d/0xb90 [ 22.834726][ T67] cleanup_net+0xa5d/0xb90 [ 22.834852][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 22.834986][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 22.835110][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 22.835236][ T67] ? lock_acquire+0x32/0xc0 [ 22.835361][ T67] ? process_one_work+0xe0b/0x16d0 [ 22.835493][ T67] process_one_work+0xe55/0x16d0 [ 22.835621][ T67] ? __pfx___lock_release+0x10/0x10 [ 22.835746][ T67] ? __pfx_process_one_work+0x10/0x10 [ 22.835872][ T67] ? assign_work+0x16c/0x240 [ 22.835999][ T67] worker_thread+0x58c/0xce0 [ 22.836124][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 22.836283][ T67] ? __pfx_worker_thread+0x10/0x10 [ 22.836418][ T67] ? __pfx_worker_thread+0x10/0x10 [ 22.836552][ T67] kthread+0x28a/0x350 [ 22.836651][ T67] ? __pfx_kthread+0x10/0x10 [ 22.836776][ T67] ret_from_fork+0x31/0x70 [ 22.836902][ T67] ? __pfx_kthread+0x10/0x10 [ 22.837027][ T67] ret_from_fork_asm+0x1a/0x30 [ 22.837157][ T67] [ 22.837254][ T67] [ 22.837322][ T67] Allocated by task 251: [ 22.837419][ T67] kasan_save_stack+0x24/0x50 [ 22.837547][ T67] kasan_save_track+0x14/0x30 [ 22.837671][ T67] __kasan_slab_alloc+0x59/0x70 [ 22.837796][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 22.837923][ T67] copy_net_ns+0xc6/0x540 [ 22.838022][ T67] create_new_namespaces+0x35f/0x920 [ 22.838151][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 22.838278][ T67] ksys_unshare+0x2c4/0x6e0 [ 22.838404][ T67] __x64_sys_unshare+0x31/0x40 [ 22.838531][ T67] do_syscall_64+0xc1/0x1d0 [ 22.838659][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.838816][ T67] [ 22.838880][ T67] Freed by task 67: [ 22.838978][ T67] kasan_save_stack+0x24/0x50 [ 22.839105][ T67] kasan_save_track+0x14/0x30 [ 22.839230][ T67] kasan_save_free_info+0x3b/0x60 [ 22.839356][ T67] __kasan_slab_free+0x38/0x50 [ 22.839481][ T67] kmem_cache_free+0xf8/0x330 [ 22.839608][ T67] cleanup_net+0x5a8/0xb90 [ 22.839733][ T67] process_one_work+0xe55/0x16d0 [ 22.839857][ T67] worker_thread+0x58c/0xce0 [ 22.839983][ T67] kthread+0x28a/0x350 [ 22.840081][ T67] ret_from_fork+0x31/0x70 [ 22.840207][ T67] ret_from_fork_asm+0x1a/0x30 [ 22.840331][ T67] [ 22.840394][ T67] Last potentially related work creation: [ 22.840523][ T67] kasan_save_stack+0x24/0x50 [ 22.840652][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 22.840780][ T67] insert_work+0x34/0x230 [ 22.840874][ T67] __queue_work+0x5fd/0xa40 [ 22.840999][ T67] queue_delayed_work_on+0x8c/0xa0 [ 22.841125][ T67] __inet_insert_ifa+0x751/0xb10 [ 22.841253][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 22.841379][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 22.841504][ T67] netlink_rcv_skb+0x130/0x360 [ 22.841634][ T67] netlink_unicast+0x44b/0x710 [ 22.841758][ T67] netlink_sendmsg+0x723/0xbe0 [ 22.841883][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 22.842011][ T67] ___sys_sendmsg+0xee/0x170 [ 22.842136][ T67] __sys_sendmsg+0x109/0x1a0 [ 22.842263][ T67] do_syscall_64+0xc1/0x1d0 [ 22.842391][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.842546][ T67] [ 22.842611][ T67] Second to last potentially related work creation: [ 22.842764][ T67] kasan_save_stack+0x24/0x50 [ 22.842893][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 22.843020][ T67] insert_work+0x34/0x230 [ 22.843115][ T67] __queue_work+0x5fd/0xa40 [ 22.843241][ T67] queue_delayed_work_on+0x8c/0xa0 [ 22.843368][ T67] __inet_insert_ifa+0x751/0xb10 [ 22.843495][ T67] inetdev_event+0xb18/0xcf0 [ 22.843624][ T67] notifier_call_chain+0xcd/0x150 [ 22.843749][ T67] __dev_notify_flags+0xe6/0x250 [ 22.843874][ T67] dev_change_flags+0xec/0x160 [ 22.844000][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 22.844125][ T67] rtnl_newlink+0x6de/0xa80 [ 22.844250][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 22.844376][ T67] netlink_rcv_skb+0x130/0x360 [ 22.844501][ T67] netlink_unicast+0x44b/0x710 [ 22.844626][ T67] netlink_sendmsg+0x723/0xbe0 [ 22.844751][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 22.844874][ T67] ___sys_sendmsg+0xee/0x170 [ 22.845003][ T67] __sys_sendmsg+0x109/0x1a0 [ 22.845129][ T67] do_syscall_64+0xc1/0x1d0 [ 22.845254][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 22.845409][ T67] [ 22.845473][ T67] The buggy address belongs to the object at ffff88800b550040 [ 22.845473][ T67] which belongs to the cache net_namespace of size 6528 [ 22.845796][ T67] The buggy address is located 184 bytes inside of [ 22.845796][ T67] freed 6528-byte region [ffff88800b550040, ffff88800b5519c0) [ 22.846095][ T67] [ 22.846157][ T67] The buggy address belongs to the physical page: [ 22.846309][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b553640 pfn:0xb550 [ 22.846565][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 22.846755][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 22.846912][ T67] page_type: f5(slab) [ 22.847011][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 22.847235][ T67] raw: ffff88800b553640 0000000000040002 00000001f5000000 0000000000000000 [ 22.847457][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 22.847679][ T67] head: ffff88800b553640 0000000000040002 00000001f5000000 0000000000000000 [ 22.847896][ T67] head: 0080000000000003 ffffea00002d5401 ffffffffffffffff 0000000000000000 [ 22.848120][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 22.848340][ T67] page dumped because: kasan: bad access detected [ 22.848493][ T67] [ 22.848557][ T67] Memory state around the buggy address: [ 22.848679][ T67] ffff88800b54ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 22.848874][ T67] ffff88800b550000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 22.849052][ T67] >ffff88800b550080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.849233][ T67] ^ [ 22.849408][ T67] ffff88800b550100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.849590][ T67] ffff88800b550180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 22.849765][ T67] ================================================================== [ 22.850027][ T67] Disabling lock debugging due to kernel taint