[ 10.138654][ T256] ip (256) used greatest stack depth: 24048 bytes left [ 13.190382][ T11] ================================================================== [ 13.190606][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.190795][ T11] Read of size 8 at addr ffff88800aae00f8 by task kworker/u16:0/11 [ 13.190981][ T11] [ 13.191047][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.191239][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.191404][ T11] Workqueue: netns cleanup_net [ 13.191536][ T11] Call Trace: [ 13.191632][ T11] [ 13.191699][ T11] dump_stack_lvl+0x82/0xd0 [ 13.191830][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.191991][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.192123][ T11] print_report+0xb4/0x270 [ 13.192251][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.192380][ T11] kasan_report+0xbd/0xf0 [ 13.192479][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.192611][ T11] cleanup_net+0xa5d/0xb90 [ 13.192739][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.192869][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.192999][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.193128][ T11] ? lock_acquire+0x32/0xc0 [ 13.193261][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.193396][ T11] process_one_work+0xe55/0x16d0 [ 13.193527][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.193657][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.193786][ T11] ? assign_work+0x16c/0x240 [ 13.193914][ T11] worker_thread+0x58c/0xce0 [ 13.194046][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.194189][ T11] kthread+0x28a/0x350 [ 13.194286][ T11] ? __pfx_kthread+0x10/0x10 [ 13.194413][ T11] ret_from_fork+0x31/0x70 [ 13.194541][ T11] ? __pfx_kthread+0x10/0x10 [ 13.194668][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.194802][ T11] [ 13.194900][ T11] [ 13.194968][ T11] Allocated by task 252: [ 13.195065][ T11] kasan_save_stack+0x24/0x50 [ 13.195194][ T11] kasan_save_track+0x14/0x30 [ 13.195319][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.195446][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.195594][ T11] copy_net_ns+0xc6/0x540 [ 13.195691][ T11] create_new_namespaces+0x35f/0x920 [ 13.195818][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.195946][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.196078][ T11] __x64_sys_unshare+0x31/0x40 [ 13.196208][ T11] do_syscall_64+0xc1/0x1d0 [ 13.196336][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.196494][ T11] [ 13.196560][ T11] Freed by task 11: [ 13.196654][ T11] kasan_save_stack+0x24/0x50 [ 13.196783][ T11] kasan_save_track+0x14/0x30 [ 13.196907][ T11] kasan_save_free_info+0x3b/0x60 [ 13.197037][ T11] __kasan_slab_free+0x38/0x50 [ 13.197161][ T11] kmem_cache_free+0xf8/0x330 [ 13.197285][ T11] cleanup_net+0x5a8/0xb90 [ 13.197408][ T11] process_one_work+0xe55/0x16d0 [ 13.197534][ T11] worker_thread+0x58c/0xce0 [ 13.197665][ T11] kthread+0x28a/0x350 [ 13.197760][ T11] ret_from_fork+0x31/0x70 [ 13.197885][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.198011][ T11] [ 13.198077][ T11] Last potentially related work creation: [ 13.198204][ T11] kasan_save_stack+0x24/0x50 [ 13.198332][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.198465][ T11] insert_work+0x34/0x230 [ 13.198572][ T11] __queue_work+0x5fd/0xa40 [ 13.198699][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.198825][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.198955][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.199084][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.199215][ T11] netlink_rcv_skb+0x130/0x360 [ 13.199342][ T11] netlink_unicast+0x44b/0x710 [ 13.199468][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.199595][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.199724][ T11] ___sys_sendmsg+0xee/0x170 [ 13.199855][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.199983][ T11] do_syscall_64+0xc1/0x1d0 [ 13.200113][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.200273][ T11] [ 13.200339][ T11] Second to last potentially related work creation: [ 13.200494][ T11] kasan_save_stack+0x24/0x50 [ 13.200622][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.200750][ T11] insert_work+0x34/0x230 [ 13.200846][ T11] __queue_work+0x5fd/0xa40 [ 13.200973][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.201098][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.201229][ T11] inetdev_event+0xb18/0xcf0 [ 13.201358][ T11] notifier_call_chain+0xcd/0x150 [ 13.201487][ T11] __dev_notify_flags+0xe6/0x250 [ 13.201613][ T11] dev_change_flags+0xec/0x160 [ 13.201744][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.201872][ T11] rtnl_newlink+0x6de/0xa80 [ 13.202000][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.202124][ T11] netlink_rcv_skb+0x130/0x360 [ 13.202255][ T11] netlink_unicast+0x44b/0x710 [ 13.202381][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.202508][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.202638][ T11] ___sys_sendmsg+0xee/0x170 [ 13.202768][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.202896][ T11] do_syscall_64+0xc1/0x1d0 [ 13.203024][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.203183][ T11] [ 13.203251][ T11] The buggy address belongs to the object at ffff88800aae0040 [ 13.203251][ T11] which belongs to the cache net_namespace of size 6528 [ 13.203586][ T11] The buggy address is located 184 bytes inside of [ 13.203586][ T11] freed 6528-byte region [ffff88800aae0040, ffff88800aae19c0) [ 13.203890][ T11] [ 13.203955][ T11] The buggy address belongs to the physical page: [ 13.204115][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aae5140 pfn:0xaae0 [ 13.204374][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.204565][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.204729][ T11] page_type: f5(slab) [ 13.204830][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.205059][ T11] raw: ffff88800aae5140 0000000000040003 00000001f5000000 0000000000000000 [ 13.205281][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.205505][ T11] head: ffff88800aae5140 0000000000040003 00000001f5000000 0000000000000000 [ 13.205725][ T11] head: 0080000000000003 ffffea00002ab801 ffffffffffffffff 0000000000000000 [ 13.205948][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.206167][ T11] page dumped because: kasan: bad access detected [ 13.206323][ T11] [ 13.206387][ T11] Memory state around the buggy address: [ 13.206509][ T11] ffff88800aadff80: 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.206695][ T11] ffff88800aae0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.206874][ T11] >ffff88800aae0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.207054][ T11] ^ [ 13.207233][ T11] ffff88800aae0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.207409][ T11] ffff88800aae0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.207589][ T11] ================================================================== [ 13.207789][ T11] Disabling lock debugging due to kernel taint [ 30.765062][ T246] perl (246) used greatest stack depth: 23976 bytes left