[ 13.255447][ T11] ================================================================== [ 13.255684][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.255908][ T11] Read of size 8 at addr ffff88800a4600f8 by task kworker/u16:0/11 [ 13.256113][ T11] [ 13.256188][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 13.256404][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.256582][ T11] Workqueue: netns cleanup_net [ 13.256728][ T11] Call Trace: [ 13.256833][ T11] [ 13.256907][ T11] dump_stack_lvl+0x82/0xd0 [ 13.257052][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 13.257226][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.257368][ T11] print_report+0xb4/0x270 [ 13.257508][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 13.257647][ T11] kasan_report+0xbd/0xf0 [ 13.257758][ T11] ? cleanup_net+0xa5d/0xb90 [ 13.257896][ T11] cleanup_net+0xa5d/0xb90 [ 13.258036][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.258182][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 13.258323][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 13.258465][ T11] ? lock_acquire+0x32/0xc0 [ 13.258605][ T11] ? process_one_work+0xe0b/0x16d0 [ 13.258749][ T11] process_one_work+0xe55/0x16d0 [ 13.258890][ T11] ? __pfx___lock_release+0x10/0x10 [ 13.259031][ T11] ? __pfx_process_one_work+0x10/0x10 [ 13.259174][ T11] ? assign_work+0x16c/0x240 [ 13.259314][ T11] worker_thread+0x58c/0xce0 [ 13.259455][ T11] ? __pfx_worker_thread+0x10/0x10 [ 13.259598][ T11] kthread+0x28a/0x350 [ 13.259706][ T11] ? __pfx_kthread+0x10/0x10 [ 13.259848][ T11] ret_from_fork+0x31/0x70 [ 13.259994][ T11] ? __pfx_kthread+0x10/0x10 [ 13.260134][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.260278][ T11] [ 13.260383][ T11] [ 13.260457][ T11] Allocated by task 256: [ 13.260565][ T11] kasan_save_stack+0x24/0x50 [ 13.260707][ T11] kasan_save_track+0x14/0x30 [ 13.260844][ T11] __kasan_slab_alloc+0x59/0x70 [ 13.260993][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.261140][ T11] copy_net_ns+0xc6/0x540 [ 13.261244][ T11] create_new_namespaces+0x35f/0x920 [ 13.261385][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.261531][ T11] ksys_unshare+0x2c4/0x6e0 [ 13.261673][ T11] __x64_sys_unshare+0x31/0x40 [ 13.261810][ T11] do_syscall_64+0xc1/0x1d0 [ 13.261948][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.262122][ T11] [ 13.262195][ T11] Freed by task 11: [ 13.262299][ T11] kasan_save_stack+0x24/0x50 [ 13.262439][ T11] kasan_save_track+0x14/0x30 [ 13.262576][ T11] kasan_save_free_info+0x3b/0x60 [ 13.262720][ T11] __kasan_slab_free+0x38/0x50 [ 13.262862][ T11] kmem_cache_free+0xf8/0x330 [ 13.263003][ T11] cleanup_net+0x5a8/0xb90 [ 13.263144][ T11] process_one_work+0xe55/0x16d0 [ 13.263288][ T11] worker_thread+0x58c/0xce0 [ 13.263429][ T11] kthread+0x28a/0x350 [ 13.263537][ T11] ret_from_fork+0x31/0x70 [ 13.263677][ T11] ret_from_fork_asm+0x1a/0x30 [ 13.263819][ T11] [ 13.263892][ T11] Last potentially related work creation: [ 13.264032][ T11] kasan_save_stack+0x24/0x50 [ 13.264172][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.264312][ T11] insert_work+0x34/0x230 [ 13.264427][ T11] __queue_work+0x5fd/0xa40 [ 13.264566][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.264707][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.264850][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 13.264994][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.265136][ T11] netlink_rcv_skb+0x130/0x360 [ 13.265278][ T11] netlink_unicast+0x44b/0x710 [ 13.265418][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.265560][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.265698][ T11] ___sys_sendmsg+0xee/0x170 [ 13.265838][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.265976][ T11] do_syscall_64+0xc1/0x1d0 [ 13.266118][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.266291][ T11] [ 13.266363][ T11] Second to last potentially related work creation: [ 13.266540][ T11] kasan_save_stack+0x24/0x50 [ 13.266683][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 13.266823][ T11] insert_work+0x34/0x230 [ 13.266934][ T11] __queue_work+0x5fd/0xa40 [ 13.267072][ T11] queue_delayed_work_on+0x8c/0xa0 [ 13.267212][ T11] __inet_insert_ifa+0x751/0xb10 [ 13.267354][ T11] inetdev_event+0xb18/0xcf0 [ 13.267491][ T11] notifier_call_chain+0xcd/0x150 [ 13.267631][ T11] __dev_notify_flags+0xe6/0x250 [ 13.267771][ T11] dev_change_flags+0xec/0x160 [ 13.267909][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 13.268051][ T11] rtnl_newlink+0x6de/0xa80 [ 13.268189][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 13.268327][ T11] netlink_rcv_skb+0x130/0x360 [ 13.268466][ T11] netlink_unicast+0x44b/0x710 [ 13.268606][ T11] netlink_sendmsg+0x723/0xbe0 [ 13.268745][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 13.268885][ T11] ___sys_sendmsg+0xee/0x170 [ 13.269030][ T11] __sys_sendmsg+0x109/0x1a0 [ 13.269173][ T11] do_syscall_64+0xc1/0x1d0 [ 13.269312][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.269486][ T11] [ 13.269557][ T11] The buggy address belongs to the object at ffff88800a460040 [ 13.269557][ T11] which belongs to the cache net_namespace of size 6528 [ 13.269920][ T11] The buggy address is located 184 bytes inside of [ 13.269920][ T11] freed 6528-byte region [ffff88800a460040, ffff88800a4619c0) [ 13.270258][ T11] [ 13.270331][ T11] The buggy address belongs to the physical page: [ 13.270500][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a463640 pfn:0xa460 [ 13.270777][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.271001][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.271180][ T11] page_type: f5(slab) [ 13.271291][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.271538][ T11] raw: ffff88800a463640 0000000000040002 00000001f5000000 0000000000000000 [ 13.271785][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.272033][ T11] head: ffff88800a463640 0000000000040002 00000001f5000000 0000000000000000 [ 13.272279][ T11] head: 0080000000000003 ffffea0000291801 ffffffffffffffff 0000000000000000 [ 13.272524][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.272771][ T11] page dumped because: kasan: bad access detected [ 13.272943][ T11] [ 13.273017][ T11] Memory state around the buggy address: [ 13.273153][ T11] ffff88800a45ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.273355][ T11] ffff88800a460000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.273556][ T11] >ffff88800a460080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.273756][ T11] ^ [ 13.273961][ T11] ffff88800a460100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.274163][ T11] ffff88800a460180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.274365][ T11] ================================================================== [ 13.274627][ T11] Disabling lock debugging due to kernel taint