[ 10.834960][ T265] ip (265) used greatest stack depth: 24448 bytes left [ 13.479915][ T66] ================================================================== [ 13.480169][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 13.480378][ T66] Read of size 8 at addr ffff88800b3d80f8 by task kworker/u16:1/66 [ 13.480576][ T66] [ 13.480647][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 13.480855][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 13.481026][ T66] Workqueue: netns cleanup_net [ 13.481170][ T66] Call Trace: [ 13.481275][ T66] [ 13.481349][ T66] dump_stack_lvl+0x82/0xd0 [ 13.481494][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 13.481675][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.481824][ T66] print_report+0xb4/0x270 [ 13.481960][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 13.482104][ T66] kasan_report+0xbd/0xf0 [ 13.482213][ T66] ? cleanup_net+0xa5d/0xb90 [ 13.482362][ T66] cleanup_net+0xa5d/0xb90 [ 13.482509][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 13.482657][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 13.482800][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 13.482944][ T66] ? lock_acquire+0x32/0xc0 [ 13.483080][ T66] ? process_one_work+0xe0b/0x16d0 [ 13.483229][ T66] process_one_work+0xe55/0x16d0 [ 13.483382][ T66] ? __pfx___lock_release+0x10/0x10 [ 13.483522][ T66] ? __pfx_process_one_work+0x10/0x10 [ 13.483665][ T66] ? assign_work+0x16c/0x240 [ 13.483805][ T66] worker_thread+0x58c/0xce0 [ 13.483944][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 13.484116][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.484256][ T66] ? __pfx_worker_thread+0x10/0x10 [ 13.484398][ T66] kthread+0x28a/0x350 [ 13.484505][ T66] ? __pfx_kthread+0x10/0x10 [ 13.484641][ T66] ret_from_fork+0x31/0x70 [ 13.484778][ T66] ? __pfx_kthread+0x10/0x10 [ 13.484925][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.485066][ T66] [ 13.485178][ T66] [ 13.485255][ T66] Allocated by task 260: [ 13.485365][ T66] kasan_save_stack+0x24/0x50 [ 13.485513][ T66] kasan_save_track+0x14/0x30 [ 13.485655][ T66] __kasan_slab_alloc+0x59/0x70 [ 13.485798][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 13.485941][ T66] copy_net_ns+0xc6/0x540 [ 13.486052][ T66] create_new_namespaces+0x35f/0x920 [ 13.486192][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 13.486334][ T66] ksys_unshare+0x2c4/0x6e0 [ 13.486482][ T66] __x64_sys_unshare+0x31/0x40 [ 13.486622][ T66] do_syscall_64+0xc1/0x1d0 [ 13.486766][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.486941][ T66] [ 13.487017][ T66] Freed by task 66: [ 13.487121][ T66] kasan_save_stack+0x24/0x50 [ 13.487266][ T66] kasan_save_track+0x14/0x30 [ 13.487406][ T66] kasan_save_free_info+0x3b/0x60 [ 13.487547][ T66] __kasan_slab_free+0x38/0x50 [ 13.487691][ T66] kmem_cache_free+0xf8/0x330 [ 13.487835][ T66] cleanup_net+0x5a8/0xb90 [ 13.487978][ T66] process_one_work+0xe55/0x16d0 [ 13.488117][ T66] worker_thread+0x58c/0xce0 [ 13.488260][ T66] kthread+0x28a/0x350 [ 13.488365][ T66] ret_from_fork+0x31/0x70 [ 13.488504][ T66] ret_from_fork_asm+0x1a/0x30 [ 13.488647][ T66] [ 13.488723][ T66] Last potentially related work creation: [ 13.488867][ T66] kasan_save_stack+0x24/0x50 [ 13.489012][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 13.489153][ T66] insert_work+0x34/0x230 [ 13.489257][ T66] __queue_work+0x5fd/0xa40 [ 13.489402][ T66] queue_delayed_work_on+0x8c/0xa0 [ 13.489544][ T66] __inet_insert_ifa+0x751/0xb10 [ 13.489695][ T66] inetdev_event+0xb18/0xcf0 [ 13.489836][ T66] notifier_call_chain+0xcd/0x150 [ 13.489973][ T66] __dev_notify_flags+0xe6/0x250 [ 13.490117][ T66] dev_change_flags+0xec/0x160 [ 13.490256][ T66] do_setlink.constprop.0+0x79d/0x2300 [ 13.490401][ T66] rtnl_newlink+0x6de/0xa80 [ 13.490543][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 13.490689][ T66] netlink_rcv_skb+0x130/0x360 [ 13.490831][ T66] netlink_unicast+0x44b/0x710 [ 13.490975][ T66] netlink_sendmsg+0x723/0xbe0 [ 13.491115][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 13.491254][ T66] ___sys_sendmsg+0xee/0x170 [ 13.491393][ T66] __sys_sendmsg+0x109/0x1a0 [ 13.491531][ T66] do_syscall_64+0xc1/0x1d0 [ 13.491675][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 13.491853][ T66] [ 13.491923][ T66] The buggy address belongs to the object at ffff88800b3d8040 [ 13.491923][ T66] which belongs to the cache net_namespace of size 6528 [ 13.492296][ T66] The buggy address is located 184 bytes inside of [ 13.492296][ T66] freed 6528-byte region [ffff88800b3d8040, ffff88800b3d99c0) [ 13.492639][ T66] [ 13.492716][ T66] The buggy address belongs to the physical page: [ 13.492889][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b3db640 pfn:0xb3d8 [ 13.493175][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 13.493393][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 13.493579][ T66] page_type: f5(slab) [ 13.493691][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.493951][ T66] raw: ffff88800b3db640 0000000000040002 00000001f5000000 0000000000000000 [ 13.494190][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 13.494441][ T66] head: ffff88800b3db640 0000000000040002 00000001f5000000 0000000000000000 [ 13.494679][ T66] head: 0080000000000003 ffffea00002cf601 ffffffffffffffff 0000000000000000 [ 13.494925][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 13.495166][ T66] page dumped because: kasan: bad access detected [ 13.495343][ T66] [ 13.495411][ T66] Memory state around the buggy address: [ 13.495543][ T66] ffff88800b3d7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 13.495747][ T66] ffff88800b3d8000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 13.495956][ T66] >ffff88800b3d8080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.496155][ T66] ^ [ 13.496363][ T66] ffff88800b3d8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.496561][ T66] ffff88800b3d8180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 13.496771][ T66] ================================================================== [ 13.496991][ T66] Disabling lock debugging due to kernel taint