[ 9.912854][ T254] sctp: Hash tables configured (bind 32/56) [ 12.800038][ T291] ip (291) used greatest stack depth: 24256 bytes left [ 29.998739][ T411] sctp_hello (411) used greatest stack depth: 23640 bytes left [ 45.790675][ T67] ================================================================== [ 45.790984][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 45.791308][ T67] Read of size 8 at addr ffff88800d0980f8 by task kworker/u16:1/67 [ 45.791575][ T67] [ 45.791669][ T67] CPU: 3 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 45.791951][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 45.792187][ T67] Workqueue: netns cleanup_net [ 45.792383][ T67] Call Trace: [ 45.792524][ T67] [ 45.792640][ T67] dump_stack_lvl+0x82/0xd0 [ 45.792830][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 45.793069][ T67] ? cleanup_net+0xa5d/0xb90 [ 45.793250][ T67] print_report+0xb4/0x270 [ 45.793432][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 45.793623][ T67] kasan_report+0xbd/0xf0 [ 45.793770][ T67] ? cleanup_net+0xa5d/0xb90 [ 45.793965][ T67] cleanup_net+0xa5d/0xb90 [ 45.794156][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 45.794349][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 45.794521][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 45.794701][ T67] ? lock_acquire+0x32/0xc0 [ 45.794885][ T67] ? process_one_work+0xe0b/0x16d0 [ 45.795076][ T67] process_one_work+0xe55/0x16d0 [ 45.795268][ T67] ? __pfx___lock_release+0x10/0x10 [ 45.795453][ T67] ? __pfx_process_one_work+0x10/0x10 [ 45.795643][ T67] ? assign_work+0x16c/0x240 [ 45.795826][ T67] worker_thread+0x58c/0xce0 [ 45.796001][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 45.796221][ T67] ? __pfx_worker_thread+0x10/0x10 [ 45.796405][ T67] ? __pfx_worker_thread+0x10/0x10 [ 45.796588][ T67] kthread+0x28a/0x350 [ 45.796728][ T67] ? __pfx_kthread+0x10/0x10 [ 45.796918][ T67] ret_from_fork+0x31/0x70 [ 45.797103][ T67] ? __pfx_kthread+0x10/0x10 [ 45.797278][ T67] ret_from_fork_asm+0x1a/0x30 [ 45.797465][ T67] [ 45.797599][ T67] [ 45.797688][ T67] Allocated by task 258: [ 45.797822][ T67] kasan_save_stack+0x24/0x50 [ 45.798007][ T67] kasan_save_track+0x14/0x30 [ 45.798181][ T67] __kasan_slab_alloc+0x59/0x70 [ 45.798361][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 45.798544][ T67] copy_net_ns+0xc6/0x540 [ 45.798679][ T67] create_new_namespaces+0x35f/0x920 [ 45.798862][ T67] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 45.799046][ T67] ksys_unshare+0x2c4/0x6e0 [ 45.799235][ T67] __x64_sys_unshare+0x31/0x40 [ 45.799430][ T67] do_syscall_64+0xc1/0x1d0 [ 45.799618][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.799853][ T67] [ 45.799952][ T67] Freed by task 67: [ 45.800089][ T67] kasan_save_stack+0x24/0x50 [ 45.800284][ T67] kasan_save_track+0x14/0x30 [ 45.800471][ T67] kasan_save_free_info+0x3b/0x60 [ 45.800662][ T67] __kasan_slab_free+0x38/0x50 [ 45.800857][ T67] kmem_cache_free+0xf8/0x330 [ 45.801020][ T67] cleanup_net+0x5a8/0xb90 [ 45.801200][ T67] process_one_work+0xe55/0x16d0 [ 45.801390][ T67] worker_thread+0x58c/0xce0 [ 45.801587][ T67] kthread+0x28a/0x350 [ 45.801735][ T67] ret_from_fork+0x31/0x70 [ 45.801931][ T67] ret_from_fork_asm+0x1a/0x30 [ 45.802129][ T67] [ 45.802228][ T67] Last potentially related work creation: [ 45.802401][ T67] kasan_save_stack+0x24/0x50 [ 45.802589][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 45.802789][ T67] insert_work+0x34/0x230 [ 45.802941][ T67] __queue_work+0x5fd/0xa40 [ 45.803136][ T67] queue_delayed_work_on+0x8c/0xa0 [ 45.803322][ T67] __inet_insert_ifa+0x751/0xb10 [ 45.803514][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 45.803706][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 45.803901][ T67] netlink_rcv_skb+0x130/0x360 [ 45.804096][ T67] netlink_unicast+0x44b/0x710 [ 45.804288][ T67] netlink_sendmsg+0x723/0xbe0 [ 45.804484][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 45.804676][ T67] ___sys_sendmsg+0xee/0x170 [ 45.804869][ T67] __sys_sendmsg+0x109/0x1a0 [ 45.805065][ T67] do_syscall_64+0xc1/0x1d0 [ 45.805253][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.805427][ T67] [ 45.805492][ T67] Second to last potentially related work creation: [ 45.805646][ T67] kasan_save_stack+0x24/0x50 [ 45.805776][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 45.805900][ T67] insert_work+0x34/0x230 [ 45.805995][ T67] __queue_work+0x5fd/0xa40 [ 45.806115][ T67] queue_delayed_work_on+0x8c/0xa0 [ 45.806252][ T67] __inet_insert_ifa+0x751/0xb10 [ 45.806378][ T67] inetdev_event+0xb18/0xcf0 [ 45.806501][ T67] notifier_call_chain+0xcd/0x150 [ 45.806634][ T67] __dev_notify_flags+0xe6/0x250 [ 45.806762][ T67] dev_change_flags+0xec/0x160 [ 45.806888][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 45.807012][ T67] rtnl_newlink+0x6de/0xa80 [ 45.807134][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 45.807267][ T67] netlink_rcv_skb+0x130/0x360 [ 45.807392][ T67] netlink_unicast+0x44b/0x710 [ 45.807514][ T67] netlink_sendmsg+0x723/0xbe0 [ 45.807656][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 45.807850][ T67] ___sys_sendmsg+0xee/0x170 [ 45.807975][ T67] __sys_sendmsg+0x109/0x1a0 [ 45.808096][ T67] do_syscall_64+0xc1/0x1d0 [ 45.808227][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 45.808446][ T67] [ 45.808510][ T67] The buggy address belongs to the object at ffff88800d098040 [ 45.808510][ T67] which belongs to the cache net_namespace of size 6528 [ 45.808895][ T67] The buggy address is located 184 bytes inside of [ 45.808895][ T67] freed 6528-byte region [ffff88800d098040, ffff88800d0999c0) [ 45.809205][ T67] [ 45.809285][ T67] The buggy address belongs to the physical page: [ 45.809495][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800d09d140 pfn:0xd098 [ 45.809737][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 45.809927][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 45.810154][ T67] page_type: f5(slab) [ 45.810262][ T67] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 45.810480][ T67] raw: ffff88800d09d140 0000000000040003 00000001f5000000 0000000000000000 [ 45.810771][ T67] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 45.810987][ T67] head: ffff88800d09d140 0000000000040003 00000001f5000000 0000000000000000 [ 45.811306][ T67] head: 0080000000000003 ffffea0000342601 ffffffffffffffff 0000000000000000 [ 45.811517][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 45.811800][ T67] page dumped because: kasan: bad access detected [ 45.811953][ T67] [ 45.812013][ T67] Memory state around the buggy address: [ 45.812132][ T67] ffff88800d097f80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 45.812405][ T67] ffff88800d098000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 45.812659][ T67] >ffff88800d098080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.813038][ T67] ^ [ 45.813297][ T67] ffff88800d098100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.813670][ T67] ffff88800d098180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.813910][ T67] ================================================================== [ 45.814159][ T67] Disabling lock debugging due to kernel taint