[ 12.745434][ T11] ================================================================== [ 12.745668][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 12.745879][ T11] Read of size 8 at addr ffff888004fc00f8 by task kworker/u16:0/11 [ 12.746079][ T11] [ 12.746158][ T11] CPU: 1 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 12.746369][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 12.746539][ T11] Workqueue: netns cleanup_net [ 12.746686][ T11] Call Trace: [ 12.746793][ T11] [ 12.746865][ T11] dump_stack_lvl+0x82/0xd0 [ 12.747008][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 12.747187][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.747328][ T11] print_report+0xb4/0x270 [ 12.747466][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 12.747602][ T11] kasan_report+0xbd/0xf0 [ 12.747707][ T11] ? cleanup_net+0xa5d/0xb90 [ 12.747847][ T11] cleanup_net+0xa5d/0xb90 [ 12.747986][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 12.748128][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 12.748265][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 12.748409][ T11] ? lock_acquire+0x32/0xc0 [ 12.748549][ T11] ? process_one_work+0xe0b/0x16d0 [ 12.748690][ T11] process_one_work+0xe55/0x16d0 [ 12.748832][ T11] ? __pfx___lock_release+0x10/0x10 [ 12.748976][ T11] ? __pfx_process_one_work+0x10/0x10 [ 12.749117][ T11] ? assign_work+0x16c/0x240 [ 12.749256][ T11] worker_thread+0x58c/0xce0 [ 12.749404][ T11] ? __pfx_worker_thread+0x10/0x10 [ 12.749544][ T11] kthread+0x28a/0x350 [ 12.749649][ T11] ? __pfx_kthread+0x10/0x10 [ 12.749787][ T11] ret_from_fork+0x31/0x70 [ 12.749924][ T11] ? __pfx_kthread+0x10/0x10 [ 12.750082][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.750229][ T11] [ 12.750333][ T11] [ 12.750404][ T11] Allocated by task 253: [ 12.750510][ T11] kasan_save_stack+0x24/0x50 [ 12.750651][ T11] kasan_save_track+0x14/0x30 [ 12.750786][ T11] __kasan_slab_alloc+0x59/0x70 [ 12.750923][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 12.751062][ T11] copy_net_ns+0xc6/0x540 [ 12.751167][ T11] create_new_namespaces+0x35f/0x920 [ 12.751306][ T11] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 12.751444][ T11] ksys_unshare+0x2c4/0x6e0 [ 12.751585][ T11] __x64_sys_unshare+0x31/0x40 [ 12.751723][ T11] do_syscall_64+0xc1/0x1d0 [ 12.751862][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.752037][ T11] [ 12.752109][ T11] Freed by task 11: [ 12.752215][ T11] kasan_save_stack+0x24/0x50 [ 12.752356][ T11] kasan_save_track+0x14/0x30 [ 12.752493][ T11] kasan_save_free_info+0x3b/0x60 [ 12.752632][ T11] __kasan_slab_free+0x38/0x50 [ 12.752769][ T11] kmem_cache_free+0xf8/0x330 [ 12.752908][ T11] cleanup_net+0x5a8/0xb90 [ 12.753044][ T11] process_one_work+0xe55/0x16d0 [ 12.753180][ T11] worker_thread+0x58c/0xce0 [ 12.753319][ T11] kthread+0x28a/0x350 [ 12.753426][ T11] ret_from_fork+0x31/0x70 [ 12.753564][ T11] ret_from_fork_asm+0x1a/0x30 [ 12.753699][ T11] [ 12.753771][ T11] Last potentially related work creation: [ 12.753908][ T11] kasan_save_stack+0x24/0x50 [ 12.754052][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 12.754191][ T11] insert_work+0x34/0x230 [ 12.754299][ T11] __queue_work+0x5fd/0xa40 [ 12.754439][ T11] queue_delayed_work_on+0x8c/0xa0 [ 12.754578][ T11] __inet_insert_ifa+0x751/0xb10 [ 12.754718][ T11] inetdev_event+0xb18/0xcf0 [ 12.754856][ T11] notifier_call_chain+0xcd/0x150 [ 12.754996][ T11] __dev_notify_flags+0xe6/0x250 [ 12.755137][ T11] dev_change_flags+0xec/0x160 [ 12.755279][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 12.755419][ T11] rtnl_newlink+0x6de/0xa80 [ 12.755559][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 12.755698][ T11] netlink_rcv_skb+0x130/0x360 [ 12.755840][ T11] netlink_unicast+0x44b/0x710 [ 12.755981][ T11] netlink_sendmsg+0x723/0xbe0 [ 12.756119][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 12.756260][ T11] ___sys_sendmsg+0xee/0x170 [ 12.756400][ T11] __sys_sendmsg+0x109/0x1a0 [ 12.756538][ T11] do_syscall_64+0xc1/0x1d0 [ 12.756675][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 12.756849][ T11] [ 12.756920][ T11] The buggy address belongs to the object at ffff888004fc0040 [ 12.756920][ T11] which belongs to the cache net_namespace of size 6528 [ 12.757292][ T11] The buggy address is located 184 bytes inside of [ 12.757292][ T11] freed 6528-byte region [ffff888004fc0040, ffff888004fc19c0) [ 12.757634][ T11] [ 12.757703][ T11] The buggy address belongs to the physical page: [ 12.757871][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004fc3640 pfn:0x4fc0 [ 12.758149][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 12.758356][ T11] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 12.758537][ T11] page_type: f5(slab) [ 12.758647][ T11] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.758894][ T11] raw: ffff888004fc3640 0000000000040002 00000001f5000000 0000000000000000 [ 12.759138][ T11] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 12.759381][ T11] head: ffff888004fc3640 0000000000040002 00000001f5000000 0000000000000000 [ 12.759630][ T11] head: 0080000000000003 ffffea000013f001 ffffffffffffffff 0000000000000000 [ 12.759873][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 12.760115][ T11] page dumped because: kasan: bad access detected [ 12.760286][ T11] [ 12.760354][ T11] Memory state around the buggy address: [ 12.760487][ T11] ffff888004fbff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 12.760692][ T11] ffff888004fc0000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 12.760892][ T11] >ffff888004fc0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.761090][ T11] ^ [ 12.761292][ T11] ffff888004fc0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.761494][ T11] ffff888004fc0180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 12.761695][ T11] ================================================================== [ 12.761939][ T11] Disabling lock debugging due to kernel taint