[ 29.376261][ T11] ================================================================== [ 29.376509][ T11] BUG: KASAN: slab-use-after-free in cleanup_net+0x932/0xa40 [ 29.376710][ T11] Read of size 8 at addr ffff8880059500f8 by task kworker/u16:0/11 [ 29.376905][ T11] [ 29.376973][ T11] CPU: 3 UID: 0 PID: 11 Comm: kworker/u16:0 Not tainted 6.12.0-virtme #1 [ 29.377163][ T11] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 29.377319][ T11] Workqueue: netns cleanup_net [ 29.377462][ T11] Call Trace: [ 29.377568][ T11] [ 29.377641][ T11] dump_stack_lvl+0x82/0xd0 [ 29.377780][ T11] print_address_description.constprop.0+0x2c/0x3b0 [ 29.377944][ T11] ? cleanup_net+0x932/0xa40 [ 29.378074][ T11] print_report+0xb4/0x270 [ 29.378210][ T11] ? kasan_addr_to_slab+0x25/0x80 [ 29.378341][ T11] kasan_report+0xbd/0xf0 [ 29.378440][ T11] ? cleanup_net+0x932/0xa40 [ 29.378577][ T11] cleanup_net+0x932/0xa40 [ 29.378713][ T11] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 29.378856][ T11] ? __pfx_cleanup_net+0x10/0x10 [ 29.378989][ T11] ? trace_lock_acquire+0x148/0x1f0 [ 29.379125][ T11] ? lock_acquire+0x32/0xc0 [ 29.379263][ T11] ? process_one_work+0xe0b/0x16d0 [ 29.379404][ T11] process_one_work+0xe55/0x16d0 [ 29.379539][ T11] ? __pfx___lock_release+0x10/0x10 [ 29.379679][ T11] ? __pfx_process_one_work+0x10/0x10 [ 29.379817][ T11] ? assign_work+0x16c/0x240 [ 29.379951][ T11] worker_thread+0x58c/0xce0 [ 29.380085][ T11] ? __pfx_worker_thread+0x10/0x10 [ 29.380218][ T11] kthread+0x28a/0x350 [ 29.380330][ T11] ? __pfx_kthread+0x10/0x10 [ 29.380455][ T11] ret_from_fork+0x31/0x70 [ 29.380579][ T11] ? __pfx_kthread+0x10/0x10 [ 29.380701][ T11] ret_from_fork_asm+0x1a/0x30 [ 29.380831][ T11] [ 29.380926][ T11] [ 29.380991][ T11] Allocated by task 251: [ 29.381084][ T11] kasan_save_stack+0x24/0x50 [ 29.381209][ T11] kasan_save_track+0x14/0x30 [ 29.381336][ T11] __kasan_slab_alloc+0x59/0x70 [ 29.381462][ T11] kmem_cache_alloc_noprof+0x10b/0x350 [ 29.381593][ T11] copy_net_ns+0xc6/0x340 [ 29.381688][ T11] create_new_namespaces+0x35f/0x920 [ 29.381814][ T11] unshare_nsproxy_namespaces+0x8d/0x130 [ 29.381938][ T11] ksys_unshare+0x2a9/0x660 [ 29.382063][ T11] __x64_sys_unshare+0x31/0x40 [ 29.382185][ T11] do_syscall_64+0xc1/0x1d0 [ 29.382308][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.382463][ T11] [ 29.382526][ T11] Freed by task 11: [ 29.382619][ T11] kasan_save_stack+0x24/0x50 [ 29.382746][ T11] kasan_save_track+0x14/0x30 [ 29.382867][ T11] kasan_save_free_info+0x3b/0x60 [ 29.382991][ T11] __kasan_slab_free+0x38/0x50 [ 29.383111][ T11] kmem_cache_free+0xf8/0x330 [ 29.383234][ T11] cleanup_net+0x5a8/0xa40 [ 29.383358][ T11] process_one_work+0xe55/0x16d0 [ 29.383481][ T11] worker_thread+0x58c/0xce0 [ 29.383604][ T11] kthread+0x28a/0x350 [ 29.383697][ T11] ret_from_fork+0x31/0x70 [ 29.383821][ T11] ret_from_fork_asm+0x1a/0x30 [ 29.383943][ T11] [ 29.384007][ T11] Last potentially related work creation: [ 29.384133][ T11] kasan_save_stack+0x24/0x50 [ 29.384262][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 29.384394][ T11] insert_work+0x34/0x230 [ 29.384492][ T11] __queue_work+0x5fd/0xa40 [ 29.384619][ T11] queue_delayed_work_on+0x8c/0xa0 [ 29.384749][ T11] __inet_insert_ifa+0x751/0xb10 [ 29.384875][ T11] inet_rtm_newaddr+0x833/0xbd0 [ 29.385006][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 29.385143][ T11] netlink_rcv_skb+0x130/0x360 [ 29.385273][ T11] netlink_unicast+0x44b/0x710 [ 29.385399][ T11] netlink_sendmsg+0x723/0xbe0 [ 29.385523][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 29.385656][ T11] ___sys_sendmsg+0xee/0x170 [ 29.385848][ T11] __sys_sendmsg+0x109/0x1a0 [ 29.385985][ T11] do_syscall_64+0xc1/0x1d0 [ 29.386119][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.386278][ T11] [ 29.386347][ T11] Second to last potentially related work creation: [ 29.386504][ T11] kasan_save_stack+0x24/0x50 [ 29.386697][ T11] __kasan_record_aux_stack+0x8e/0xa0 [ 29.386825][ T11] insert_work+0x34/0x230 [ 29.386923][ T11] __queue_work+0x5fd/0xa40 [ 29.387048][ T11] queue_delayed_work_on+0x8c/0xa0 [ 29.387173][ T11] __inet_insert_ifa+0x751/0xb10 [ 29.387301][ T11] inetdev_event+0xb18/0xcf0 [ 29.387427][ T11] notifier_call_chain+0xcd/0x150 [ 29.387553][ T11] __dev_notify_flags+0xe6/0x250 [ 29.387682][ T11] dev_change_flags+0xec/0x160 [ 29.387807][ T11] do_setlink.constprop.0+0x79d/0x2300 [ 29.387936][ T11] rtnl_newlink+0x6de/0xa80 [ 29.388063][ T11] rtnetlink_rcv_msg+0x712/0xc10 [ 29.388192][ T11] netlink_rcv_skb+0x130/0x360 [ 29.388389][ T11] netlink_unicast+0x44b/0x710 [ 29.388523][ T11] netlink_sendmsg+0x723/0xbe0 [ 29.388649][ T11] ____sys_sendmsg+0x7ac/0xa10 [ 29.388842][ T11] ___sys_sendmsg+0xee/0x170 [ 29.388970][ T11] __sys_sendmsg+0x109/0x1a0 [ 29.389099][ T11] do_syscall_64+0xc1/0x1d0 [ 29.389298][ T11] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 29.389462][ T11] [ 29.389526][ T11] The buggy address belongs to the object at ffff888005950040 [ 29.389526][ T11] which belongs to the cache net_namespace of size 6592 [ 29.389858][ T11] The buggy address is located 184 bytes inside of [ 29.389858][ T11] freed 6592-byte region [ffff888005950040, ffff888005951a00) [ 29.390167][ T11] [ 29.390232][ T11] The buggy address belongs to the physical page: [ 29.390389][ T11] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5950 [ 29.390608][ T11] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 29.390801][ T11] flags: 0x80000000000040(head|node=0|zone=1) [ 29.391031][ T11] page_type: f5(slab) [ 29.391132][ T11] raw: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 29.391352][ T11] raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 29.391640][ T11] head: 0080000000000040 ffff888001963240 ffff8880019680a8 ffff8880019680a8 [ 29.391925][ T11] head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 [ 29.392153][ T11] head: 0080000000000003 ffffea0000165401 ffffffffffffffff 0000000000000000 [ 29.392368][ T11] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 29.392602][ T11] page dumped because: kasan: bad access detected [ 29.392751][ T11] [ 29.392814][ T11] Memory state around the buggy address: [ 29.392942][ T11] ffff88800594ff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.393195][ T11] ffff888005950000: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.393439][ T11] >ffff888005950080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.393625][ T11] ^ [ 29.393864][ T11] ffff888005950100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.394049][ T11] ffff888005950180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.394305][ T11] ================================================================== [ 29.394509][ T11] Disabling lock debugging due to kernel taint