[ 11.254895][ T11] ================================================================== [ 11.255170][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 11.255390][ T11] Read of size 8 at addr ffff888004f400f8 by task kworker/u16:0/11 [ 11.255590][ T11] [ 11.255664][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 11.255878][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 11.256047][ T11] Workqueue: netns cleanup_net [ 11.256201][ T11] Call Trace: [ 11.256333][ T11] [ 11.256408][ T11] dump_stack_lvl+0x82/0xd0 [ 11.256557][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 11.256741][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.256886][ T11] print_report+0xb4/0x270 [ 11.257027][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 11.257169][ T11] kasan_report+0xbd/0xf0 [ 11.257274][ T11] ? cleanup_net+0xa5d/0xb90 [ 11.257417][ T11] cleanup_net+0xa5d/0xb90 [ 11.257567][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 11.257708][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 11.257853][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 11.258013][ T11] ? lock_acquire+0x32/0xc0 [ 11.258157][ T11] ? process_one_work+0xe0b/0x16d0 [ 11.258305][ T11] process_one_work+0xe55/0x16d0 [ 11.258449][ T11] ? __pfx___lock_release+0x10/0x10 [ 11.258589][ T11] ? __pfx_process_one_work+0x10/0x10 [ 11.258737][ T11] ? assign_work+0x16c/0x240 [ 11.258881][ T11] worker_thread+0x58c/0xce0 [ 11.259025][ T11] ? __pfx_worker_thread+0x10/0x10 [ 11.259170][ T11] kthread+0x28a/0x350 [ 11.259275][ T11] ? __pfx_kthread+0x10/0x10 [ 11.259414][ T11] ret_from_fork+0x31/0x70 [ 11.259566][ T11] ? __pfx_kthread+0x10/0x10 [ 11.259720][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.259869][ T11] [ 11.259976][ T11] [ 11.260051][ T11] Allocated by task 253: [ 11.260166][ T11] kasan_save_stack+0x24/0x50 [ 11.260307][ T11] kasan_save_track+0x14/0x30 [ 11.260441][ T11] __kasan_slab_alloc+0x59/0x70 [ 11.260588][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 11.260736][ T11] copy_net_ns+0xc6/0x540 [ 11.260841][ T11] create_new_namespaces+0x35f/0x920 [ 11.260984][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 11.261119][ T11] ksys_unshare+0x2c4/0x6e0 [ 11.261258][ T11] __x64_sys_unshare+0x31/0x40 [ 11.261402][ T11] do_syscall_64+0xc1/0x1d0 [ 11.261543][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.261716][ T11] [ 11.261787][ T11] Freed by task 11: [ 11.261894][ T11] kasan_save_stack+0x24/0x50 [ 11.262040][ T11] kasan_save_track+0x14/0x30 [ 11.262183][ T11] kasan_save_free_info+0x3b/0x60 [ 11.262324][ T11] __kasan_slab_free+0x38/0x50 [ 11.262461][ T11] kmem_cache_free+0xf8/0x330 [ 11.262598][ T11] cleanup_net+0x5a8/0xb90 [ 11.262733][ T11] process_one_work+0xe55/0x16d0 [ 11.262893][ T11] worker_thread+0x58c/0xce0 [ 11.263033][ T11] kthread+0x28a/0x350 [ 11.263141][ T11] ret_from_fork+0x31/0x70 [ 11.263279][ T11] ret_from_fork_asm+0x1a/0x30 [ 11.263425][ T11] [ 11.263496][ T11] Last potentially related work creation: [ 11.263636][ T11] kasan_save_stack+0x24/0x50 [ 11.263778][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 11.263917][ T11] insert_work+0x34/0x230 [ 11.264025][ T11] __queue_work+0x5fd/0xa40 [ 11.264165][ T11] queue_delayed_work_on+0x8c/0xa0 [ 11.264300][ T11] __inet_insert_ifa+0x751/0xb10 [ 11.264440][ T11] inetdev_event+0xb18/0xcf0 [ 11.264586][ T11] notifier_call_chain+0xcd/0x150 [ 11.264724][ T11] __dev_notify_flags+0xe6/0x250 [ 11.264863][ T11] dev_change_flags+0xec/0x160 [ 11.265008][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 11.265176][ T11] rtnl_newlink+0x6de/0xa80 [ 11.265326][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 11.265466][ T11] netlink_rcv_skb+0x130/0x360 [ 11.265617][ T11] netlink_unicast+0x44b/0x710 [ 11.265761][ T11] netlink_sendmsg+0x723/0xbe0 [ 11.265904][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 11.266050][ T11] ___sys_sendmsg+0xee/0x170 [ 11.266194][ T11] __sys_sendmsg+0x109/0x1a0 [ 11.266352][ T11] do_syscall_64+0xc1/0x1d0 [ 11.266502][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 11.266688][ T11] [ 11.266770][ T11] The buggy address belongs to the object at ffff888004f40040 [ 11.266770][ T11] which belongs to the cache net_namespace of size 6528 [ 11.267144][ T11] The buggy address is located 184 bytes inside of [ 11.267144][ T11] freed 6528-byte region [ffff888004f40040, ffff888004f419c0) [ 11.267484][ T11] [ 11.267558][ T11] The buggy address belongs to the physical page: [ 11.267738][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004f43640 pfn:0x4f40 [ 11.268029][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 11.268247][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 11.268438][ T11] page_type: f5(slab) [ 11.268552][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.268809][ T11] raw: ffff888004f43640 0000000000040002 00000001f5000000 0000000000000000 [ 11.269044][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 11.269288][ T11] head: ffff888004f43640 0000000000040002 00000001f5000000 0000000000000000 [ 11.269526][ T11] head: 0080000000000003 ffffea000013d001 ffffffffffffffff 0000000000000000 [ 11.269765][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 11.270007][ T11] page dumped because: kasan: bad access detected [ 11.270171][ T11] [ 11.270240][ T11] Memory state around the buggy address: [ 11.270390][ T11] ffff888004f3ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [ 11.270596][ T11] ffff888004f40000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 11.270796][ T11] >ffff888004f40080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.270992][ T11] ^ [ 11.271193][ T11] ffff888004f40100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.271391][ T11] ffff888004f40180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 11.271605][ T11] ================================================================== [ 11.271841][ T11] Disabling lock debugging due to kernel taint