[ 13.772242][ T11] ================================================================== [ 13.772540][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.772731][ T11] Read of size 8 at addr ffff888005f900f8 by task kworker/u16:0/11 [ 13.772916][ T11] [ 13.772985][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.773186][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.773343][ T11] Workqueue: netns cleanup_net [ 13.773496][ T11] Call Trace: [ 13.773612][ T11] [ 13.773681][ T11] dump_stack_lvl+0x82/0xd0 [ 13.773810][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.773995][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.774141][ T11] print_report+0xb4/0x270 [ 13.774276][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.774408][ T11] kasan_report+0xbd/0xf0 [ 13.774519][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.774648][ T11] cleanup_net+0xa5d/0xb90 [ 13.774773][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.774911][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.775035][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.775171][ T11] ? lock_acquire+0x32/0xc0 [ 13.775295][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.775418][ T11] process_one_work+0xe55/0x16d0 [ 13.775537][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.775656][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.775783][ T11] ? assign_work+0x16c/0x240 [ 13.775905][ T11] worker_thread+0x58c/0xce0 [ 13.776032][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.776156][ T11] kthread+0x28a/0x350 [ 13.776249][ T11] ? __pfx_kthread+0x10/0x10 [ 13.776394][ T11] ret_from_fork+0x31/0x70 [ 13.776520][ T11] ? __pfx_kthread+0x10/0x10 [ 13.776650][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.776785][ T11] [ 13.776893][ T11] [ 13.776955][ T11] Allocated by task 252: [ 13.777049][ T11] kasan_save_stack+0x24/0x50 [ 13.777176][ T11] kasan_save_track+0x14/0x30 [ 13.777297][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.777417][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.777542][ T11] copy_net_ns+0xc6/0x540 [ 13.777639][ T11] create_new_namespaces+0x35f/0x920 [ 13.777767][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.777904][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.778026][ T11] __x64_sys_unshare+0x31/0x40 [ 13.778149][ T11] do_syscall_64+0xc1/0x1d0 [ 13.778272][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.778423][ T11] [ 13.778484][ T11] Freed by task 11: [ 13.778573][ T11] kasan_save_stack+0x24/0x50 [ 13.778695][ T11] kasan_save_track+0x14/0x30 [ 13.778819][ T11] kasan_save_free_info+0x3b/0x60 [ 13.778939][ T11] __kasan_slab_free+0x38/0x50 [ 13.779057][ T11] kmem_cache_free+0xf8/0x330 [ 13.779176][ T11] cleanup_net+0x5a8/0xb90 [ 13.779295][ T11] process_one_work+0xe55/0x16d0 [ 13.779413][ T11] worker_thread+0x58c/0xce0 [ 13.779551][ T11] kthread+0x28a/0x350 [ 13.779647][ T11] ret_from_fork+0x31/0x70 [ 13.779771][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.779900][ T11] [ 13.779962][ T11] Last potentially related work creation: [ 13.780080][ T11] kasan_save_stack+0x24/0x50 [ 13.780205][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.780328][ T11] insert_work+0x34/0x230 [ 13.780425][ T11] __queue_work+0x5fd/0xa40 [ 13.780580][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.780710][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.780845][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.780984][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.781115][ T11] netlink_rcv_skb+0x130/0x360 [ 13.781243][ T11] netlink_unicast+0x44b/0x710 [ 13.781368][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.781494][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.781622][ T11] ___sys_sendmsg+0xee/0x170 [ 13.781758][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.781887][ T11] do_syscall_64+0xc1/0x1d0 [ 13.782014][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.782178][ T11] [ 13.782242][ T11] Second to last potentially related work creation: [ 13.782391][ T11] kasan_save_stack+0x24/0x50 [ 13.782515][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.782637][ T11] insert_work+0x34/0x230 [ 13.782734][ T11] __queue_work+0x5fd/0xa40 [ 13.782857][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.782989][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.783112][ T11] inetdev_event+0xb18/0xcf0 [ 13.783235][ T11] notifier_call_chain+0xcd/0x150 [ 13.783361][ T11] __dev_notify_flags+0xe6/0x250 [ 13.783483][ T11] dev_change_flags+0xec/0x160 [ 13.783604][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.783730][ T11] rtnl_newlink+0x6de/0xa80 [ 13.783853][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.783994][ T11] netlink_rcv_skb+0x130/0x360 [ 13.784116][ T11] netlink_unicast+0x44b/0x710 [ 13.784265][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.784391][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.784528][ T11] ___sys_sendmsg+0xee/0x170 [ 13.784655][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.784785][ T11] do_syscall_64+0xc1/0x1d0 [ 13.784914][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.785073][ T11] [ 13.785138][ T11] The buggy address belongs to the object at ffff888005f90040 [ 13.785138][ T11] which belongs to the cache net_namespace of size 6528 [ 13.785473][ T11] The buggy address is located 184 bytes inside of [ 13.785473][ T11] freed 6528-byte region [ffff888005f90040, ffff888005f919c0) [ 13.785780][ T11] [ 13.785846][ T11] The buggy address belongs to the physical page: [ 13.786008][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005f95140 pfn:0x5f90 [ 13.786263][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.786449][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.786611][ T11] page_type: f5(slab) [ 13.786731][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.786954][ T11] raw: ffff888005f95140 0000000000040003 00000001f5000000 0000000000000000 [ 13.787175][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.787403][ T11] head: ffff888005f95140 0000000000040003 00000001f5000000 0000000000000000 [ 13.787635][ T11] head: 0080000000000003 ffffea000017e401 ffffffffffffffff 0000000000000000 [ 13.787857][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.788075][ T11] page dumped because: kasan: bad access detected [ 13.788229][ T11] [ 13.788292][ T11] Memory state around the buggy address: [ 13.788419][ T11] ffff888005f8ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.788603][ T11] ffff888005f90000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.788790][ T11] >ffff888005f90080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.788972][ T11] ^ [ 13.789155][ T11] ffff888005f90100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.789349][ T11] ffff888005f90180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.789529][ T11] ================================================================== [ 13.789733][ T11] Disabling lock debugging due to kernel taint [ 56.101387][ T834] udpgso_bench_tx (834) used greatest stack depth: 23736 bytes left