[ 126.940368][ T11] ================================================================== [ 126.940624][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 126.940846][ T11] Read of size 8 at addr ffff8880095680f8 by task kworker/u16:0/11 [ 126.941050][ T11] [ 126.941130][ T11] CPU: 0 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 126.941339][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 126.941521][ T11] Workqueue: netns cleanup_net [ 126.941668][ T11] Call Trace: [ 126.941771][ T11] [ 126.941843][ T11] dump_stack_lvl+0x82/0xd0 [ 126.941987][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 126.942173][ T11] ? cleanup_net+0x932/0xa40 [ 126.942313][ T11] print_report+0xb4/0x270 [ 126.942459][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 126.942602][ T11] kasan_report+0xbd/0xf0 [ 126.942707][ T11] ? cleanup_net+0x932/0xa40 [ 126.942846][ T11] cleanup_net+0x932/0xa40 [ 126.942982][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 126.943135][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 126.943278][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 126.943417][ T11] ? lock_acquire+0x32/0xc0 [ 126.943557][ T11] ? process_one_work+0xe0b/0x16d0 [ 126.943698][ T11] process_one_work+0xe55/0x16d0 [ 126.943835][ T11] ? __pfx___lock_release+0x10/0x10 [ 126.943972][ T11] ? __pfx_process_one_work+0x10/0x10 [ 126.944114][ T11] ? assign_work+0x16c/0x240 [ 126.944258][ T11] worker_thread+0x58c/0xce0 [ 126.944398][ T11] ? __pfx_worker_thread+0x10/0x10 [ 126.944540][ T11] kthread+0x28a/0x350 [ 126.944651][ T11] ? __pfx_kthread+0x10/0x10 [ 126.944786][ T11] ret_from_fork+0x31/0x70 [ 126.944924][ T11] ? __pfx_kthread+0x10/0x10 [ 126.945066][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.945214][ T11] [ 126.945321][ T11] [ 126.945394][ T11] Allocated by task 252: [ 126.945497][ T11] kasan_save_stack+0x24/0x50 [ 126.945637][ T11] kasan_save_track+0x14/0x30 [ 126.945775][ T11] __kasan_slab_alloc+0x59/0x70 [ 126.945913][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 126.946058][ T11] copy_net_ns+0xc6/0x340 [ 126.946174][ T11] create_new_namespaces+0x35f/0x920 [ 126.946325][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 126.946460][ T11] ksys_unshare+0x2a9/0x660 [ 126.946602][ T11] __x64_sys_unshare+0x31/0x40 [ 126.946738][ T11] do_syscall_64+0xc1/0x1d0 [ 126.946879][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.947052][ T11] [ 126.947131][ T11] Freed by task 11: [ 126.947236][ T11] kasan_save_stack+0x24/0x50 [ 126.947379][ T11] kasan_save_track+0x14/0x30 [ 126.947517][ T11] kasan_save_free_info+0x3b/0x60 [ 126.947674][ T11] __kasan_slab_free+0x38/0x50 [ 126.947814][ T11] kmem_cache_free+0xf8/0x330 [ 126.947950][ T11] cleanup_net+0x5a8/0xa40 [ 126.948086][ T11] process_one_work+0xe55/0x16d0 [ 126.948248][ T11] worker_thread+0x58c/0xce0 [ 126.948384][ T11] kthread+0x28a/0x350 [ 126.948514][ T11] ret_from_fork+0x31/0x70 [ 126.948647][ T11] ret_from_fork_asm+0x1a/0x30 [ 126.948787][ T11] [ 126.948858][ T11] Last potentially related work creation: [ 126.948995][ T11] kasan_save_stack+0x24/0x50 [ 126.949146][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.949285][ T11] insert_work+0x34/0x230 [ 126.949392][ T11] __queue_work+0x5fd/0xa40 [ 126.949534][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.949676][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.949822][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.949966][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.950117][ T11] netlink_rcv_skb+0x130/0x360 [ 126.950266][ T11] netlink_unicast+0x44b/0x710 [ 126.950407][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.950551][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.950705][ T11] ___sys_sendmsg+0xee/0x170 [ 126.950846][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.950984][ T11] do_syscall_64+0xc1/0x1d0 [ 126.951134][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.951302][ T11] [ 126.951372][ T11] Second to last potentially related work creation: [ 126.951537][ T11] kasan_save_stack+0x24/0x50 [ 126.951677][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 126.951816][ T11] insert_work+0x34/0x230 [ 126.951918][ T11] __queue_work+0x5fd/0xa40 [ 126.952052][ T11] queue_delayed_work_on+0x8c/0xa0 [ 126.952195][ T11] __inet_insert_ifa+0x751/0xb10 [ 126.952330][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 126.952465][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 126.952600][ T11] netlink_rcv_skb+0x130/0x360 [ 126.952743][ T11] netlink_unicast+0x44b/0x710 [ 126.952887][ T11] netlink_sendmsg+0x723/0xbe0 [ 126.953023][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 126.953167][ T11] ___sys_sendmsg+0xee/0x170 [ 126.953303][ T11] __sys_sendmsg+0x109/0x1a0 [ 126.953441][ T11] do_syscall_64+0xc1/0x1d0 [ 126.953576][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 126.953744][ T11] [ 126.953814][ T11] The buggy address belongs to the object at ffff888009568040 [ 126.953814][ T11] which belongs to the cache net_namespace of size 6592 [ 126.954179][ T11] The buggy address is located 184 bytes inside of [ 126.954179][ T11] freed 6592-byte region [ffff888009568040, ffff888009569a00) [ 126.954504][ T11] [ 126.954571][ T11] The buggy address belongs to the physical page: [ 126.954730][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800956d200 pfn:0x9568 [ 126.954998][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 126.955208][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 126.955377][ T11] page_type: f5(slab) [ 126.955483][ T11] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 126.955724][ T11] raw: ffff88800956d200 0000000000040003 00000001f5000000 0000000000000000 [ 126.955958][ T11] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 126.956208][ T11] head: ffff88800956d200 0000000000040003 00000001f5000000 0000000000000000 [ 126.956442][ T11] head: 0080000000000003 ffffea0000255a01 ffffffffffffffff 0000000000000000 [ 126.956690][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 126.956927][ T11] page dumped because: kasan: bad access detected [ 126.957096][ T11] [ 126.957172][ T11] Memory state around the buggy address: [ 126.957303][ T11] ffff888009567f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 126.957495][ T11] ffff888009568000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 126.957690][ T11] >ffff888009568080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.957881][ T11] ^ [ 126.958070][ T11] ffff888009568100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.958273][ T11] ffff888009568180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 126.958479][ T11] ================================================================== [ 126.958708][ T11] Disabling lock debugging due to kernel taint