[ 28.462571][ T67] ================================================================== [ 28.462789][ T67] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 28.462981][ T67] Read of size 8 at addr ffff88800b6f80f8 by task kworker/u16:1/67 [ 28.463167][ T67] [ 28.463235][ T67] CPU: 2 UID: 0 PID: 67 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 28.463425][ T67] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 28.463583][ T67] Workqueue: netns cleanup_net [ 28.463716][ T67] Call Trace: [ 28.463814][ T67] [ 28.463881][ T67] dump_stack_lvl+0x82/0xd0 [ 28.464012][ T67] print_address_description.constprop.0+0x2c/0x3b0 [ 28.464170][ T67] ? cleanup_net+0x932/0xa40 [ 28.464298][ T67] print_report+0xb4/0x270 [ 28.464421][ T67] ? kasan_addr_to_slab+0x25/0x80 [ 28.464546][ T67] kasan_report+0xbd/0xf0 [ 28.464641][ T67] ? cleanup_net+0x932/0xa40 [ 28.464766][ T67] cleanup_net+0x932/0xa40 [ 28.464891][ T67] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 28.465024][ T67] ? __pfx_cleanup_net+0x10/0x10 [ 28.465150][ T67] ? trace_lock_acquire+0x148/0x1f0 [ 28.465276][ T67] ? lock_acquire+0x32/0xc0 [ 28.465404][ T67] ? process_one_work+0xe0b/0x16d0 [ 28.465531][ T67] process_one_work+0xe55/0x16d0 [ 28.465656][ T67] ? __pfx___lock_release+0x10/0x10 [ 28.465779][ T67] ? __pfx_process_one_work+0x10/0x10 [ 28.465909][ T67] ? assign_work+0x16c/0x240 [ 28.466032][ T67] worker_thread+0x58c/0xce0 [ 28.466151][ T67] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 28.466305][ T67] ? __pfx_worker_thread+0x10/0x10 [ 28.466431][ T67] ? __pfx_worker_thread+0x10/0x10 [ 28.466552][ T67] kthread+0x28a/0x350 [ 28.466646][ T67] ? __pfx_kthread+0x10/0x10 [ 28.466774][ T67] ret_from_fork+0x31/0x70 [ 28.466902][ T67] ? __pfx_kthread+0x10/0x10 [ 28.467028][ T67] ret_from_fork_asm+0x1a/0x30 [ 28.467156][ T67] [ 28.467249][ T67] [ 28.467313][ T67] Allocated by task 249: [ 28.467407][ T67] kasan_save_stack+0x24/0x50 [ 28.467532][ T67] kasan_save_track+0x14/0x30 [ 28.467657][ T67] __kasan_slab_alloc+0x59/0x70 [ 28.467780][ T67] kmem_cache_alloc_noprof+0x10b/0x350 [ 28.467923][ T67] copy_net_ns+0xc6/0x340 [ 28.468018][ T67] create_new_namespaces+0x35f/0x920 [ 28.468144][ T67] unshare_nsproxy_namespaces+0x8d/0x130 [ 28.468269][ T67] ksys_unshare+0x2a9/0x660 [ 28.468394][ T67] __x64_sys_unshare+0x31/0x40 [ 28.468516][ T67] do_syscall_64+0xc1/0x1d0 [ 28.468640][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.468796][ T67] [ 28.468860][ T67] Freed by task 67: [ 28.468955][ T67] kasan_save_stack+0x24/0x50 [ 28.469078][ T67] kasan_save_track+0x14/0x30 [ 28.469201][ T67] kasan_save_free_info+0x3b/0x60 [ 28.469326][ T67] __kasan_slab_free+0x38/0x50 [ 28.469449][ T67] kmem_cache_free+0xf8/0x330 [ 28.469572][ T67] cleanup_net+0x5a8/0xa40 [ 28.469693][ T67] process_one_work+0xe55/0x16d0 [ 28.469816][ T67] worker_thread+0x58c/0xce0 [ 28.469936][ T67] kthread+0x28a/0x350 [ 28.470029][ T67] ret_from_fork+0x31/0x70 [ 28.470149][ T67] ret_from_fork_asm+0x1a/0x30 [ 28.470271][ T67] [ 28.470334][ T67] Last potentially related work creation: [ 28.470454][ T67] kasan_save_stack+0x24/0x50 [ 28.470577][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 28.470703][ T67] insert_work+0x34/0x230 [ 28.470800][ T67] __queue_work+0x5fd/0xa40 [ 28.470924][ T67] queue_delayed_work_on+0x8c/0xa0 [ 28.471047][ T67] __inet_insert_ifa+0x751/0xb10 [ 28.471173][ T67] inet_rtm_newaddr+0x833/0xbd0 [ 28.471295][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 28.471420][ T67] netlink_rcv_skb+0x130/0x360 [ 28.471545][ T67] netlink_unicast+0x44b/0x710 [ 28.471669][ T67] netlink_sendmsg+0x723/0xbe0 [ 28.471796][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 28.471919][ T67] ___sys_sendmsg+0xee/0x170 [ 28.472042][ T67] __sys_sendmsg+0x109/0x1a0 [ 28.472164][ T67] do_syscall_64+0xc1/0x1d0 [ 28.472290][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.472444][ T67] [ 28.472507][ T67] Second to last potentially related work creation: [ 28.472660][ T67] kasan_save_stack+0x24/0x50 [ 28.472783][ T67] __kasan_record_aux_stack+0x8e/0xa0 [ 28.472907][ T67] insert_work+0x34/0x230 [ 28.473000][ T67] __queue_work+0x5fd/0xa40 [ 28.473120][ T67] queue_delayed_work_on+0x8c/0xa0 [ 28.473243][ T67] __inet_insert_ifa+0x751/0xb10 [ 28.473366][ T67] inetdev_event+0xb18/0xcf0 [ 28.473492][ T67] notifier_call_chain+0xcd/0x150 [ 28.473617][ T67] __dev_notify_flags+0xe6/0x250 [ 28.473745][ T67] dev_change_flags+0xec/0x160 [ 28.473880][ T67] do_setlink.constprop.0+0x79d/0x2300 [ 28.474002][ T67] rtnl_newlink+0x6de/0xa80 [ 28.474123][ T67] rtnetlink_rcv_msg+0x712/0xc10 [ 28.474247][ T67] netlink_rcv_skb+0x130/0x360 [ 28.474370][ T67] netlink_unicast+0x44b/0x710 [ 28.474497][ T67] netlink_sendmsg+0x723/0xbe0 [ 28.474622][ T67] ____sys_sendmsg+0x7ac/0xa10 [ 28.474746][ T67] ___sys_sendmsg+0xee/0x170 [ 28.474866][ T67] __sys_sendmsg+0x109/0x1a0 [ 28.474988][ T67] do_syscall_64+0xc1/0x1d0 [ 28.475113][ T67] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.475267][ T67] [ 28.475332][ T67] The buggy address belongs to the object at ffff88800b6f8040 [ 28.475332][ T67] which belongs to the cache net_namespace of size 6592 [ 28.475655][ T67] The buggy address is located 184 bytes inside of [ 28.475655][ T67] freed 6592-byte region [ffff88800b6f8040, ffff88800b6f9a00) [ 28.475949][ T67] [ 28.476010][ T67] The buggy address belongs to the physical page: [ 28.476160][ T67] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b6fb6c0 pfn:0xb6f8 [ 28.476409][ T67] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 28.476594][ T67] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 28.476751][ T67] page_type: f5(slab) [ 28.476847][ T67] raw: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 28.477071][ T67] raw: ffff88800b6fb6c0 0000000000040002 00000001f5000000 0000000000000000 [ 28.477287][ T67] head: 0080000000000240 ffff888001963240 ffff888001968088 ffff888001968088 [ 28.477504][ T67] head: ffff88800b6fb6c0 0000000000040002 00000001f5000000 0000000000000000 [ 28.477720][ T67] head: 0080000000000003 ffffea00002dbe01 ffffffffffffffff 0000000000000000 [ 28.477943][ T67] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 28.478158][ T67] page dumped because: kasan: bad access detected [ 28.478310][ T67] [ 28.478372][ T67] Memory state around the buggy address: [ 28.478491][ T67] ffff88800b6f7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.478673][ T67] ffff88800b6f8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.478855][ T67] >ffff88800b6f8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.479032][ T67] ^ [ 28.479210][ T67] ffff88800b6f8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.479384][ T67] ffff88800b6f8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.479559][ T67] ================================================================== [ 28.479792][ T67] Disabling lock debugging due to kernel taint