[ 13.862844][ T68] ================================================================== [ 13.863053][ T68] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.863238][ T68] Read of size 8 at addr ffff8880050780f8 by task kworker/u16:1/68 [ 13.863412][ T68] [ 13.863474][ T68] CPU: 0 UID: 0 PID: 68 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.863660][ T68] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.863811][ T68] Workqueue: netns cleanup_net [ 13.863941][ T68] Call Trace: [ 13.864033][ T68] [ 13.864100][ T68] dump_stack_lvl+0x82/0xd0 [ 13.864231][ T68] print_address_description.constprop.0+0x2c/0x3b0 [ 13.864386][ T68] ? cleanup_net+0xa5d/0xb90 [ 13.864507][ T68] print_report+0xb4/0x270 [ 13.864627][ T68] ? kasan_addr_to_slab+0x25/0x80 [ 13.864748][ T68] kasan_report+0xbd/0xf0 [ 13.864845][ T68] ? cleanup_net+0xa5d/0xb90 [ 13.864968][ T68] cleanup_net+0xa5d/0xb90 [ 13.865089][ T68] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.865214][ T68] ? __pfx_cleanup_net+0x10/0x10 [ 13.865333][ T68] ? trace_lock_acquire+0x148/0x1f0 [ 13.865455][ T68] ? lock_acquire+0x32/0xc0 [ 13.865576][ T68] ? process_one_work+0xe0b/0x16d0 [ 13.865702][ T68] process_one_work+0xe55/0x16d0 [ 13.865823][ T68] ? __pfx___lock_release+0x10/0x10 [ 13.865946][ T68] ? __pfx_process_one_work+0x10/0x10 [ 13.866069][ T68] ? assign_work+0x16c/0x240 [ 13.866193][ T68] worker_thread+0x58c/0xce0 [ 13.866313][ T68] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.866462][ T68] ? __pfx_worker_thread+0x10/0x10 [ 13.866583][ T68] ? __pfx_worker_thread+0x10/0x10 [ 13.866702][ T68] kthread+0x28a/0x350 [ 13.866795][ T68] ? __pfx_kthread+0x10/0x10 [ 13.866917][ T68] ret_from_fork+0x31/0x70 [ 13.867037][ T68] ? __pfx_kthread+0x10/0x10 [ 13.867156][ T68] ret_from_fork_asm+0x1a/0x30 [ 13.867279][ T68] [ 13.867369][ T68] [ 13.867432][ T68] Allocated by task 256: [ 13.867525][ T68] kasan_save_stack+0x24/0x50 [ 13.867647][ T68] kasan_save_track+0x14/0x30 [ 13.867764][ T68] __kasan_slab_alloc+0x59/0x70 [ 13.867884][ T68] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.868007][ T68] copy_net_ns+0xc6/0x540 [ 13.868099][ T68] create_new_namespaces+0x35f/0x920 [ 13.868221][ T68] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.868340][ T68] ksys_unshare+0x2c4/0x6e0 [ 13.868462][ T68] __x64_sys_unshare+0x31/0x40 [ 13.868583][ T68] do_syscall_64+0xc1/0x1d0 [ 13.868704][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.868856][ T68] [ 13.868917][ T68] Freed by task 68: [ 13.869008][ T68] kasan_save_stack+0x24/0x50 [ 13.869128][ T68] kasan_save_track+0x14/0x30 [ 13.869246][ T68] kasan_save_free_info+0x3b/0x60 [ 13.869367][ T68] __kasan_slab_free+0x38/0x50 [ 13.869486][ T68] kmem_cache_free+0xf8/0x330 [ 13.869604][ T68] cleanup_net+0x5a8/0xb90 [ 13.869722][ T68] process_one_work+0xe55/0x16d0 [ 13.869842][ T68] worker_thread+0x58c/0xce0 [ 13.869961][ T68] kthread+0x28a/0x350 [ 13.870052][ T68] ret_from_fork+0x31/0x70 [ 13.870174][ T68] ret_from_fork_asm+0x1a/0x30 [ 13.870292][ T68] [ 13.870356][ T68] Last potentially related work creation: [ 13.870481][ T68] kasan_save_stack+0x24/0x50 [ 13.870606][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 13.870729][ T68] insert_work+0x34/0x230 [ 13.870823][ T68] __queue_work+0x5fd/0xa40 [ 13.870949][ T68] queue_delayed_work_on+0x8c/0xa0 [ 13.871070][ T68] __inet_insert_ifa+0x751/0xb10 [ 13.871191][ T68] inet_rtm_newaddr+0x833/0xbd0 [ 13.871316][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 13.871445][ T68] netlink_rcv_skb+0x130/0x360 [ 13.871568][ T68] netlink_unicast+0x44b/0x710 [ 13.871690][ T68] netlink_sendmsg+0x723/0xbe0 [ 13.871811][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 13.871935][ T68] ___sys_sendmsg+0xee/0x170 [ 13.872057][ T68] __sys_sendmsg+0x109/0x1a0 [ 13.872177][ T68] do_syscall_64+0xc1/0x1d0 [ 13.872297][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.872448][ T68] [ 13.872513][ T68] Second to last potentially related work creation: [ 13.872659][ T68] kasan_save_stack+0x24/0x50 [ 13.872780][ T68] __kasan_record_aux_stack+0x8e/0xa0 [ 13.872904][ T68] insert_work+0x34/0x230 [ 13.872998][ T68] __queue_work+0x5fd/0xa40 [ 13.873120][ T68] queue_delayed_work_on+0x8c/0xa0 [ 13.873243][ T68] __inet_insert_ifa+0x751/0xb10 [ 13.873365][ T68] inetdev_event+0xb18/0xcf0 [ 13.873485][ T68] notifier_call_chain+0xcd/0x150 [ 13.873605][ T68] __dev_notify_flags+0xe6/0x250 [ 13.873730][ T68] dev_change_flags+0xec/0x160 [ 13.873852][ T68] do_setlink.constprop.0+0x79d/0x2300 [ 13.873973][ T68] rtnl_newlink+0x6de/0xa80 [ 13.874092][ T68] rtnetlink_rcv_msg+0x712/0xc10 [ 13.874212][ T68] netlink_rcv_skb+0x130/0x360 [ 13.874333][ T68] netlink_unicast+0x44b/0x710 [ 13.874453][ T68] netlink_sendmsg+0x723/0xbe0 [ 13.874573][ T68] ____sys_sendmsg+0x7ac/0xa10 [ 13.874696][ T68] ___sys_sendmsg+0xee/0x170 [ 13.874817][ T68] __sys_sendmsg+0x109/0x1a0 [ 13.874940][ T68] do_syscall_64+0xc1/0x1d0 [ 13.875060][ T68] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.875209][ T68] [ 13.875271][ T68] The buggy address belongs to the object at ffff888005078040 [ 13.875271][ T68] which belongs to the cache net_namespace of size 6528 [ 13.875586][ T68] The buggy address is located 184 bytes inside of [ 13.875586][ T68] freed 6528-byte region [ffff888005078040, ffff8880050799c0) [ 13.875873][ T68] [ 13.875935][ T68] The buggy address belongs to the physical page: [ 13.876081][ T68] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800507b640 pfn:0x5078 [ 13.876328][ T68] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.876510][ T68] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.876663][ T68] page_type: f5(slab) [ 13.876759][ T68] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.876975][ T68] raw: ffff88800507b640 0000000000040002 00000001f5000000 0000000000000000 [ 13.877191][ T68] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.877405][ T68] head: ffff88800507b640 0000000000040002 00000001f5000000 0000000000000000 [ 13.877618][ T68] head: 0080000000000003 ffffea0000141e01 ffffffffffffffff 0000000000000000 [ 13.877828][ T68] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.878040][ T68] page dumped because: kasan: bad access detected [ 13.878191][ T68] [ 13.878253][ T68] Memory state around the buggy address: [ 13.878371][ T68] ffff888005077f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.878546][ T68] ffff888005078000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.878718][ T68] >ffff888005078080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.878894][ T68] ^ [ 13.879067][ T68] ffff888005078100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.879240][ T68] ffff888005078180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.879409][ T68] ================================================================== [ 13.879608][ T68] Disabling lock debugging due to kernel taint