[ 18.016421][ T11] ================================================================== [ 18.016671][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 18.016865][ T11] Read of size 8 at addr ffff888004ff80f8 by task kworker/u16:0/11 [ 18.017065][ T11] [ 18.017140][ T11] CPU: 2 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 18.017359][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 18.017544][ T11] Workqueue: netns cleanup_net [ 18.017680][ T11] Call Trace: [ 18.017780][ T11] [ 18.017856][ T11] dump_stack_lvl+0x82/0xd0 [ 18.017997][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 18.018169][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.018299][ T11] print_report+0xb4/0x270 [ 18.018425][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 18.018552][ T11] kasan_report+0xbd/0xf0 [ 18.018658][ T11] ? cleanup_net+0xa5d/0xb90 [ 18.018791][ T11] cleanup_net+0xa5d/0xb90 [ 18.018943][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 18.019093][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 18.019234][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 18.019366][ T11] ? lock_acquire+0x32/0xc0 [ 18.019504][ T11] ? process_one_work+0xe0b/0x16d0 [ 18.019645][ T11] process_one_work+0xe55/0x16d0 [ 18.019806][ T11] ? __pfx___lock_release+0x10/0x10 [ 18.019941][ T11] ? __pfx_process_one_work+0x10/0x10 [ 18.020084][ T11] ? assign_work+0x16c/0x240 [ 18.020213][ T11] worker_thread+0x58c/0xce0 [ 18.020345][ T11] ? __pfx_worker_thread+0x10/0x10 [ 18.020494][ T11] kthread+0x28a/0x350 [ 18.020593][ T11] ? __pfx_kthread+0x10/0x10 [ 18.020722][ T11] ret_from_fork+0x31/0x70 [ 18.020851][ T11] ? __pfx_kthread+0x10/0x10 [ 18.020980][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.021127][ T11] [ 18.021236][ T11] [ 18.021310][ T11] Allocated by task 252: [ 18.021420][ T11] kasan_save_stack+0x24/0x50 [ 18.021563][ T11] kasan_save_track+0x14/0x30 [ 18.021696][ T11] __kasan_slab_alloc+0x59/0x70 [ 18.021831][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 18.021970][ T11] copy_net_ns+0xc6/0x540 [ 18.022076][ T11] create_new_namespaces+0x35f/0x920 [ 18.022219][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 18.022353][ T11] ksys_unshare+0x2c4/0x6e0 [ 18.022484][ T11] __x64_sys_unshare+0x31/0x40 [ 18.022612][ T11] do_syscall_64+0xc1/0x1d0 [ 18.022745][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.022913][ T11] [ 18.022981][ T11] Freed by task 11: [ 18.023082][ T11] kasan_save_stack+0x24/0x50 [ 18.023227][ T11] kasan_save_track+0x14/0x30 [ 18.023356][ T11] kasan_save_free_info+0x3b/0x60 [ 18.023494][ T11] __kasan_slab_free+0x38/0x50 [ 18.023623][ T11] kmem_cache_free+0xf8/0x330 [ 18.023748][ T11] cleanup_net+0x5a8/0xb90 [ 18.023873][ T11] process_one_work+0xe55/0x16d0 [ 18.024001][ T11] worker_thread+0x58c/0xce0 [ 18.024131][ T11] kthread+0x28a/0x350 [ 18.024229][ T11] ret_from_fork+0x31/0x70 [ 18.024356][ T11] ret_from_fork_asm+0x1a/0x30 [ 18.024488][ T11] [ 18.024564][ T11] Last potentially related work creation: [ 18.024694][ T11] kasan_save_stack+0x24/0x50 [ 18.024823][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 18.024948][ T11] insert_work+0x34/0x230 [ 18.025047][ T11] __queue_work+0x5fd/0xa40 [ 18.025175][ T11] queue_delayed_work_on+0x8c/0xa0 [ 18.025301][ T11] __inet_insert_ifa+0x751/0xb10 [ 18.025431][ T11] inetdev_event+0xb18/0xcf0 [ 18.025561][ T11] notifier_call_chain+0xcd/0x150 [ 18.025700][ T11] __dev_notify_flags+0xe6/0x250 [ 18.025835][ T11] dev_change_flags+0xec/0x160 [ 18.025973][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 18.026118][ T11] rtnl_newlink+0x6de/0xa80 [ 18.026249][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 18.026380][ T11] netlink_rcv_skb+0x130/0x360 [ 18.026532][ T11] netlink_unicast+0x44b/0x710 [ 18.026669][ T11] netlink_sendmsg+0x723/0xbe0 [ 18.026805][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 18.026948][ T11] ___sys_sendmsg+0xee/0x170 [ 18.027090][ T11] __sys_sendmsg+0x109/0x1a0 [ 18.027232][ T11] do_syscall_64+0xc1/0x1d0 [ 18.027376][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 18.027536][ T11] [ 18.027604][ T11] The buggy address belongs to the object at ffff888004ff8040 [ 18.027604][ T11] which belongs to the cache net_namespace of size 6528 [ 18.027947][ T11] The buggy address is located 184 bytes inside of [ 18.027947][ T11] freed 6528-byte region [ffff888004ff8040, ffff888004ff99c0) [ 18.028268][ T11] [ 18.028333][ T11] The buggy address belongs to the physical page: [ 18.028500][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004ffb640 pfn:0x4ff8 [ 18.028764][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 18.028976][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 18.029152][ T11] page_type: f5(slab) [ 18.029254][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.029485][ T11] raw: ffff888004ffb640 0000000000040002 00000001f5000000 0000000000000000 [ 18.029727][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 18.030013][ T11] head: ffff888004ffb640 0000000000040002 00000001f5000000 0000000000000000 [ 18.030244][ T11] head: 0080000000000003 ffffea000013fe01 ffffffffffffffff 0000000000000000 [ 18.030488][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 18.030709][ T11] page dumped because: kasan: bad access detected [ 18.030868][ T11] [ 18.030936][ T11] Memory state around the buggy address: [ 18.031066][ T11] ffff888004ff7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 18.031258][ T11] ffff888004ff8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 18.031457][ T11] >ffff888004ff8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.031648][ T11] ^ [ 18.031835][ T11] ffff888004ff8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.032039][ T11] ffff888004ff8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 18.032224][ T11] ================================================================== [ 18.032472][ T11] Disabling lock debugging due to kernel taint