[ 10.623179][ T258] ip (258) used greatest stack depth: 24168 bytes left [ 14.660849][ T66] ================================================================== [ 14.661142][ T66] BUG: KASAN: slab-use-after-free in cleanup_net+0xa5d/0xb90 [ 14.661382][ T66] Read of size 8 at addr ffff88800c921bf8 by task kworker/u16:1/66 [ 14.661606][ T66] [ 14.661689][ T66] CPU: 0 UID: 0 PID: 66 Comm: kworker/u16:1 Not tainted 6.12.0-virtme #1 [ 14.661933][ T66] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 [ 14.662135][ T66] Workqueue: netns cleanup_net [ 14.662301][ T66] Call Trace: [ 14.662429][ T66] [ 14.662513][ T66] dump_stack_lvl+0x82/0xd0 [ 14.662676][ T66] print_address_description.constprop.0+0x2c/0x3b0 [ 14.662876][ T66] ? cleanup_net+0xa5d/0xb90 [ 14.663041][ T66] print_report+0xb4/0x270 [ 14.663193][ T66] ? kasan_addr_to_slab+0x25/0x80 [ 14.663349][ T66] kasan_report+0xbd/0xf0 [ 14.663466][ T66] ? cleanup_net+0xa5d/0xb90 [ 14.663633][ T66] cleanup_net+0xa5d/0xb90 [ 14.663790][ T66] ? __pfx_lock_acquire.part.0+0x10/0x10 [ 14.663951][ T66] ? __pfx_cleanup_net+0x10/0x10 [ 14.664117][ T66] ? trace_lock_acquire+0x148/0x1f0 [ 14.664275][ T66] ? lock_acquire+0x32/0xc0 [ 14.664430][ T66] ? process_one_work+0xe0b/0x16d0 [ 14.664595][ T66] process_one_work+0xe55/0x16d0 [ 14.664751][ T66] ? __pfx___lock_release+0x10/0x10 [ 14.664916][ T66] ? __pfx_process_one_work+0x10/0x10 [ 14.665079][ T66] ? assign_work+0x16c/0x240 [ 14.665241][ T66] worker_thread+0x58c/0xce0 [ 14.665399][ T66] ? lockdep_hardirqs_on_prepare+0x275/0x410 [ 14.665595][ T66] ? __pfx_worker_thread+0x10/0x10 [ 14.665748][ T66] ? __pfx_worker_thread+0x10/0x10 [ 14.665905][ T66] kthread+0x28a/0x350 [ 14.666025][ T66] ? __pfx_kthread+0x10/0x10 [ 14.666188][ T66] ret_from_fork+0x31/0x70 [ 14.666355][ T66] ? __pfx_kthread+0x10/0x10 [ 14.666512][ T66] ret_from_fork_asm+0x1a/0x30 [ 14.666673][ T66] [ 14.666793][ T66] [ 14.666873][ T66] Allocated by task 255: [ 14.666995][ T66] kasan_save_stack+0x24/0x50 [ 14.667152][ T66] kasan_save_track+0x14/0x30 [ 14.667313][ T66] __kasan_slab_alloc+0x59/0x70 [ 14.667469][ T66] kmem_cache_alloc_noprof+0x10b/0x350 [ 14.667636][ T66] copy_net_ns+0xc6/0x540 [ 14.667759][ T66] create_new_namespaces+0x35f/0x920 [ 14.667923][ T66] unshare_nsproxy_namespaces+0x8a/0x1b0 [ 14.668085][ T66] ksys_unshare+0x2c4/0x6e0 [ 14.668249][ T66] __x64_sys_unshare+0x31/0x40 [ 14.668407][ T66] do_syscall_64+0xc1/0x1d0 [ 14.668580][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.668776][ T66] [ 14.668862][ T66] Freed by task 66: [ 14.668985][ T66] kasan_save_stack+0x24/0x50 [ 14.669147][ T66] kasan_save_track+0x14/0x30 [ 14.669304][ T66] kasan_save_free_info+0x3b/0x60 [ 14.669464][ T66] __kasan_slab_free+0x38/0x50 [ 14.669622][ T66] kmem_cache_free+0xf8/0x330 [ 14.669779][ T66] cleanup_net+0x5a8/0xb90 [ 14.669932][ T66] process_one_work+0xe55/0x16d0 [ 14.670093][ T66] worker_thread+0x58c/0xce0 [ 14.670247][ T66] kthread+0x28a/0x350 [ 14.670370][ T66] ret_from_fork+0x31/0x70 [ 14.670534][ T66] ret_from_fork_asm+0x1a/0x30 [ 14.670706][ T66] [ 14.670791][ T66] Last potentially related work creation: [ 14.670950][ T66] kasan_save_stack+0x24/0x50 [ 14.671110][ T66] __kasan_record_aux_stack+0x8e/0xa0 [ 14.671271][ T66] insert_work+0x34/0x230 [ 14.671398][ T66] __queue_work+0x5fd/0xa40 [ 14.671557][ T66] queue_delayed_work_on+0x8c/0xa0 [ 14.671711][ T66] __inet_insert_ifa+0x751/0xb10 [ 14.671874][ T66] inet_rtm_newaddr+0x833/0xbd0 [ 14.672032][ T66] rtnetlink_rcv_msg+0x712/0xc10 [ 14.672192][ T66] netlink_rcv_skb+0x130/0x360 [ 14.672355][ T66] netlink_unicast+0x44b/0x710 [ 14.672513][ T66] netlink_sendmsg+0x723/0xbe0 [ 14.672672][ T66] ____sys_sendmsg+0x7ac/0xa10 [ 14.672833][ T66] ___sys_sendmsg+0xee/0x170 [ 14.672996][ T66] __sys_sendmsg+0x109/0x1a0 [ 14.673157][ T66] do_syscall_64+0xc1/0x1d0 [ 14.673312][ T66] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 14.673514][ T66] [ 14.673593][ T66] The buggy address belongs to the object at ffff88800c921b40 [ 14.673593][ T66] which belongs to the cache net_namespace of size 6528 [ 14.674016][ T66] The buggy address is located 184 bytes inside of [ 14.674016][ T66] freed 6528-byte region [ffff88800c921b40, ffff88800c9234c0) [ 14.674391][ T66] [ 14.674471][ T66] The buggy address belongs to the physical page: [ 14.674666][ T66] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c923640 pfn:0xc920 [ 14.674977][ T66] head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 [ 14.675214][ T66] flags: 0x80000000000240(workingset|head|node=0|zone=1) [ 14.675415][ T66] page_type: f5(slab) [ 14.675541][ T66] raw: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.675820][ T66] raw: ffff88800c923640 0000000000040002 00000001f5000000 0000000000000000 [ 14.676095][ T66] head: 0080000000000240 ffff888001975240 ffff88800197a088 ffff88800197a088 [ 14.676387][ T66] head: ffff88800c923640 0000000000040002 00000001f5000000 0000000000000000 [ 14.676665][ T66] head: 0080000000000003 ffffea0000324801 ffffffffffffffff 0000000000000000 [ 14.676944][ T66] head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 [ 14.677226][ T66] page dumped because: kasan: bad access detected [ 14.677420][ T66] [ 14.677504][ T66] Memory state around the buggy address: [ 14.677657][ T66] ffff88800c921a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 14.677882][ T66] ffff88800c921b00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 14.678117][ T66] >ffff88800c921b80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.678352][ T66] ^ [ 14.678578][ T66] ffff88800c921c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.678808][ T66] ffff88800c921c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 14.679034][ T66] ================================================================== [ 14.679302][ T66] Disabling lock debugging due to kernel taint