[ 39.531539][ T11] ================================================================== [ 39.531755][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 39.531939][ T11] Read of size 8 at addr ffff888004f600f8 by task kworker/u16:0/11 [ 39.532120][ T11] [ 39.532183][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 39.532372][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 39.532525][ T11] Workqueue: netns cleanup_net [ 39.532654][ T11] Call Trace: [ 39.532748][ T11] [ 39.532813][ T11] dump_stack_lvl+0x82/0xd0 [ 39.532941][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 39.533097][ T11] ? cleanup_net+0xa5d/0xb90 [ 39.533223][ T11] print_report+0xb4/0x270 [ 39.533348][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 39.533473][ T11] kasan_report+0xbd/0xf0 [ 39.533567][ T11] ? cleanup_net+0xa5d/0xb90 [ 39.533691][ T11] cleanup_net+0xa5d/0xb90 [ 39.533812][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 39.533939][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 39.534060][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 39.534185][ T11] ? lock_acquire+0x32/0xc0 [ 39.534306][ T11] ? process_one_work+0xe0b/0x16d0 [ 39.534433][ T11] process_one_work+0xe55/0x16d0 [ 39.534556][ T11] ? __pfx___lock_release+0x10/0x10 [ 39.534677][ T11] ? __pfx_process_one_work+0x10/0x10 [ 39.534803][ T11] ? assign_work+0x16c/0x240 [ 39.534926][ T11] worker_thread+0x58c/0xce0 [ 39.535050][ T11] ? __pfx_worker_thread+0x10/0x10 [ 39.535169][ T11] kthread+0x28a/0x350 [ 39.535262][ T11] ? __pfx_kthread+0x10/0x10 [ 39.535387][ T11] ret_from_fork+0x31/0x70 [ 39.535511][ T11] ? __pfx_kthread+0x10/0x10 [ 39.535631][ T11] ret_from_fork_asm+0x1a/0x30 [ 39.535759][ T11] [ 39.535857][ T11] [ 39.535920][ T11] Allocated by task 563: [ 39.536011][ T11] kasan_save_stack+0x24/0x50 [ 39.536134][ T11] kasan_save_track+0x14/0x30 [ 39.536257][ T11] __kasan_slab_alloc+0x59/0x70 [ 39.536379][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 39.536502][ T11] copy_net_ns+0xc6/0x540 [ 39.536593][ T11] create_new_namespaces+0x35f/0x920 [ 39.536718][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 39.536842][ T11] ksys_unshare+0x2c4/0x6e0 [ 39.536964][ T11] __x64_sys_unshare+0x31/0x40 [ 39.537085][ T11] do_syscall_64+0xc1/0x1d0 [ 39.537217][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.537371][ T11] [ 39.537435][ T11] Freed by task 11: [ 39.537528][ T11] kasan_save_stack+0x24/0x50 [ 39.537652][ T11] kasan_save_track+0x14/0x30 [ 39.537772][ T11] kasan_save_free_info+0x3b/0x60 [ 39.537895][ T11] __kasan_slab_free+0x38/0x50 [ 39.538015][ T11] kmem_cache_free+0xf8/0x330 [ 39.538139][ T11] cleanup_net+0x5a8/0xb90 [ 39.538260][ T11] process_one_work+0xe55/0x16d0 [ 39.538382][ T11] worker_thread+0x58c/0xce0 [ 39.538502][ T11] kthread+0x28a/0x350 [ 39.538594][ T11] ret_from_fork+0x31/0x70 [ 39.538715][ T11] ret_from_fork_asm+0x1a/0x30 [ 39.538839][ T11] [ 39.538901][ T11] Last potentially related work creation: [ 39.539021][ T11] kasan_save_stack+0x24/0x50 [ 39.539144][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 39.539270][ T11] insert_work+0x34/0x230 [ 39.539361][ T11] __queue_work+0x5fd/0xa40 [ 39.539487][ T11] queue_delayed_work_on+0x8c/0xa0 [ 39.539612][ T11] __inet_insert_ifa+0x751/0xb10 [ 39.539737][ T11] inetdev_event+0xb18/0xcf0 [ 39.539863][ T11] notifier_call_chain+0xcd/0x150 [ 39.539991][ T11] __dev_notify_flags+0xe6/0x250 [ 39.540115][ T11] dev_change_flags+0xec/0x160 [ 39.540237][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 39.540365][ T11] rtnl_newlink+0x6de/0xa80 [ 39.540486][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 39.540609][ T11] netlink_rcv_skb+0x130/0x360 [ 39.540738][ T11] netlink_unicast+0x44b/0x710 [ 39.540865][ T11] netlink_sendmsg+0x723/0xbe0 [ 39.540985][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 39.541107][ T11] ___sys_sendmsg+0xee/0x170 [ 39.541231][ T11] __sys_sendmsg+0x109/0x1a0 [ 39.541357][ T11] do_syscall_64+0xc1/0x1d0 [ 39.541480][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 39.541638][ T11] [ 39.541701][ T11] The buggy address belongs to the object at ffff888004f60040 [ 39.541701][ T11] which belongs to the cache net_namespace of size 6528 [ 39.542018][ T11] The buggy address is located 184 bytes inside of [ 39.542018][ T11] freed 6528-byte region [ffff888004f60040, ffff888004f619c0) [ 39.542319][ T11] [ 39.542384][ T11] The buggy address belongs to the physical page: [ 39.542531][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004f65140 pfn:0x4f60 [ 39.542786][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 39.542970][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 39.543134][ T11] page_type: f5(slab) [ 39.543233][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 39.543451][ T11] raw: ffff888004f65140 0000000000040003 00000001f5000000 0000000000000000 [ 39.543667][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 39.543882][ T11] head: ffff888004f65140 0000000000040003 00000001f5000000 0000000000000000 [ 39.544096][ T11] head: 0080000000000003 ffffea000013d801 ffffffffffffffff 0000000000000000 [ 39.544307][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 39.544519][ T11] page dumped because: kasan: bad access detected [ 39.544669][ T11] [ 39.544730][ T11] Memory state around the buggy address: [ 39.544847][ T11] ffff888004f5ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 39.545023][ T11] ffff888004f60000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.545195][ T11] >ffff888004f60080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.545366][ T11] ^ [ 39.545538][ T11] ffff888004f60100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.545714][ T11] ffff888004f60180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.545884][ T11] ================================================================== [ 39.546111][ T11] Disabling lock debugging due to kernel taint