[ 20.824610][ T65] ================================================================== [ 20.824914][ T65] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 20.825171][ T65] Read of size 8 at addr ffff88800b7080f8 by task kworker/u16:1/65 [ 20.825386][ T65] [ 20.825462][ T65] CPU: 3 UID: 0 PID: 65 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 20.825701][ T65] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 20.825887][ T65] Workqueue: netns cleanup_net [ 20.826053][ T65] Call Trace: [ 20.826170][ T65] [ 20.826257][ T65] dump_stack_lvl+0x82/0xd0 [ 20.826415][ T65] print_address_description.constprop.0+0x2c/0x3b0 [ 20.826681][ T65] ? cleanup_net+0x932/0xa40 [ 20.826842][ T65] print_report+0xb4/0x270 [ 20.826994][ T65] ? kasan_addr_to_slab+0x25/0x80 [ 20.827149][ T65] kasan_report+0xbd/0xf0 [ 20.827266][ T65] ? cleanup_net+0x932/0xa40 [ 20.827423][ T65] cleanup_net+0x932/0xa40 [ 20.827568][ T65] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 20.827724][ T65] ? __pfx_cleanup_net+0x10/0x10 [ 20.828448][ T65] ? trace_lock_acquire+0x148/0x1f0 [ 20.828586][ T65] ? lock_acquire+0x32/0xc0 [ 20.828718][ T65] ? process_one_work+0xe0b/0x16d0 [ 20.828907][ T65] process_one_work+0xe55/0x16d0 [ 20.829052][ T65] ? __pfx___lock_release+0x10/0x10 [ 20.829188][ T65] ? __pfx_process_one_work+0x10/0x10 [ 20.829332][ T65] ? assign_work+0x16c/0x240 [ 20.829465][ T65] worker_thread+0x58c/0xce0 [ 20.829605][ T65] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 20.829771][ T65] ? __pfx_worker_thread+0x10/0x10 [ 20.829913][ T65] ? __pfx_worker_thread+0x10/0x10 [ 20.830066][ T65] kthread+0x28a/0x350 [ 20.830163][ T65] ? __pfx_kthread+0x10/0x10 [ 20.830302][ T65] ret_from_fork+0x31/0x70 [ 20.830435][ T65] ? __pfx_kthread+0x10/0x10 [ 20.830604][ T65] ret_from_fork_asm+0x1a/0x30 [ 20.830740][ T65] [ 20.830846][ T65] [ 20.830927][ T65] Allocated by task 257: [ 20.831036][ T65] kasan_save_stack+0x24/0x50 [ 20.831168][ T65] kasan_save_track+0x14/0x30 [ 20.831302][ T65] __kasan_slab_alloc+0x59/0x70 [ 20.831453][ T65] kmem_cache_alloc_noprof+0x10b/0x350 [ 20.831590][ T65] copy_net_ns+0xc6/0x340 [ 20.831686][ T65] create_new_namespaces+0x35f/0x920 [ 20.831854][ T65] unshare_nsproxy_namespaces+0x8d/0x130 [ 20.831996][ T65] ksys_unshare+0x2a9/0x660 [ 20.832134][ T65] __x64_sys_unshare+0x31/0x40 [ 20.832269][ T65] do_syscall_64+0xc1/0x1d0 [ 20.832406][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.832587][ T65] [ 20.832658][ T65] Freed by task 65: [ 20.832757][ T65] kasan_save_stack+0x24/0x50 [ 20.832894][ T65] kasan_save_track+0x14/0x30 [ 20.833036][ T65] kasan_save_free_info+0x3b/0x60 [ 20.833179][ T65] __kasan_slab_free+0x38/0x50 [ 20.833321][ T65] kmem_cache_free+0xf8/0x330 [ 20.833462][ T65] cleanup_net+0x5a8/0xa40 [ 20.833592][ T65] process_one_work+0xe55/0x16d0 [ 20.833719][ T65] worker_thread+0x58c/0xce0 [ 20.833856][ T65] kthread+0x28a/0x350 [ 20.833956][ T65] ret_from_fork+0x31/0x70 [ 20.834081][ T65] ret_from_fork_asm+0x1a/0x30 [ 20.834217][ T65] [ 20.834290][ T65] Last potentially related work creation: [ 20.834435][ T65] kasan_save_stack+0x24/0x50 [ 20.834598][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 20.834735][ T65] insert_work+0x34/0x230 [ 20.834834][ T65] __queue_work+0x5fd/0xa40 [ 20.834960][ T65] queue_delayed_work_on+0x8c/0xa0 [ 20.835098][ T65] __inet_insert_ifa+0x751/0xb10 [ 20.835265][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 20.835400][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 20.835536][ T65] netlink_rcv_skb+0x130/0x360 [ 20.835672][ T65] netlink_unicast+0x44b/0x710 [ 20.835804][ T65] netlink_sendmsg+0x723/0xbe0 [ 20.835938][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 20.836066][ T65] ___sys_sendmsg+0xee/0x170 [ 20.836201][ T65] __sys_sendmsg+0x109/0x1a0 [ 20.836330][ T65] do_syscall_64+0xc1/0x1d0 [ 20.836463][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.836696][ T65] [ 20.836772][ T65] Second to last potentially related work creation: [ 20.836957][ T65] kasan_save_stack+0x24/0x50 [ 20.837115][ T65] __kasan_record_aux_stack+0x8e/0xa0 [ 20.837258][ T65] insert_work+0x34/0x230 [ 20.837368][ T65] __queue_work+0x5fd/0xa40 [ 20.837512][ T65] queue_delayed_work_on+0x8c/0xa0 [ 20.837661][ T65] __inet_insert_ifa+0x751/0xb10 [ 20.837807][ T65] inet_rtm_newaddr+0x833/0xbd0 [ 20.837949][ T65] rtnetlink_rcv_msg+0x712/0xc10 [ 20.838092][ T65] netlink_rcv_skb+0x130/0x360 [ 20.838241][ T65] netlink_unicast+0x44b/0x710 [ 20.838387][ T65] netlink_sendmsg+0x723/0xbe0 [ 20.838557][ T65] ____sys_sendmsg+0x7ac/0xa10 [ 20.838712][ T65] ___sys_sendmsg+0xee/0x170 [ 20.838859][ T65] __sys_sendmsg+0x109/0x1a0 [ 20.839000][ T65] do_syscall_64+0xc1/0x1d0 [ 20.839145][ T65] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 20.839323][ T65] [ 20.839397][ T65] The buggy address belongs to the object at ffff88800b708040 [ 20.839397][ T65] which belongs to the cache net_namespace of size 6080 [ 20.839774][ T65] The buggy address is located 184 bytes inside of [ 20.839774][ T65] freed 6080-byte region [ffff88800b708040, ffff88800b709800) [ 20.840125][ T65] [ 20.840201][ T65] The buggy address belongs to the physical page: [ 20.840378][ T65] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b70b2c0 pfn:0xb708 [ 20.840664][ T65] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 20.840893][ T65] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 20.841078][ T65] page_type: f5(slab) [ 20.841186][ T65] raw: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 20.841470][ T65] raw: ffff88800b70b2c0 0000000000050002 00000001f5000000 0000000000000000 [ 20.841725][ T65] head: 0080000000000240 ffff888001927240 ffff88800192c088 ffff88800192c088 [ 20.841977][ T65] head: ffff88800b70b2c0 0000000000050002 00000001f5000000 0000000000000000 [ 20.842223][ T65] head: 0080000000000003 ffffea00002dc201 ffffffffffffffff 0000000000000000 [ 20.842505][ T65] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 20.842790][ T65] page dumped because: kasan: bad access detected [ 20.842980][ T65] [ 20.843057][ T65] Memory state around the buggy address: [ 20.843218][ T65] ffff88800b707f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 20.843432][ T65] ffff88800b708000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 20.843665][ T65] >ffff88800b708080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.843893][ T65] ^ [ 20.844108][ T65] ffff88800b708100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.844314][ T65] ffff88800b708180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 20.844494][ T65] ================================================================== [ 20.844799][ T65] Disabling lock debugging due to kernel taint [ 199.406269][ T2856] netem: version 1.3 [ 1473.723596][T18821] pm_nl_ctl (18821) used greatest stack depth: 22944 bytes left