[ 22.109529][ T231] ==================================================================
[ 22.110082][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 22.110486][ T231] Read of size 1 at addr ffff888009ab068c by task packetdrill/231
[ 22.110968][ T231]
[ 22.111150][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.111158][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.111165][ T231] Call Trace:
[ 22.111168][ T231]
[ 22.111172][ T231] dump_stack_lvl+0x82/0xc0
[ 22.111187][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 22.111198][ T231] ? kobject_put+0xbb/0xd0
[ 22.111206][ T231] print_report+0xb4/0x270
[ 22.111212][ T231] ? kobject_put+0xbb/0xd0
[ 22.111217][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 22.111223][ T231] ? kobject_put+0xbb/0xd0
[ 22.111228][ T231] kasan_report+0xca/0x100
[ 22.111235][ T231] ? kobject_put+0xbb/0xd0
[ 22.111245][ T231] kobject_put+0xbb/0xd0
[ 22.111251][ T231] netdev_run_todo+0x5f0/0xc60
[ 22.111259][ T231] ? rtnl_is_locked+0x15/0x20
[ 22.111263][ T231] ? netif_state_change+0x228/0x2c0
[ 22.111268][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.111274][ T231] ? generic_xdp_install+0x410/0x410
[ 22.111281][ T231] ? tun_chr_close+0xae/0x1c0
[ 22.111293][ T231] tun_chr_close+0xc0/0x1c0
[ 22.111300][ T231] __fput+0x35c/0xa70
[ 22.111311][ T231] fput_close_sync+0xdd/0x1b0
[ 22.111317][ T231] ? alloc_file_clone+0xf0/0xf0
[ 22.111326][ T231] __x64_sys_close+0x7d/0xd0
[ 22.111331][ T231] do_syscall_64+0xc1/0xfd0
[ 22.111339][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.111350][ T231] RIP: 0033:0x4901eb
[ 22.111357][ T231] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44
[ 22.111365][ T231] RSP: 002b:00007fff3f865410 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.111372][ T231] RAX: ffffffffffffffda RBX: 00007fff3f865970 RCX: 00000000004901eb
[ 22.111376][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.111378][ T231] RBP: 00007fff3f865450 R08: 0000000000000000 R09: 0000000000000000
[ 22.111381][ T231] R10: 0000000000100000 R11: 0000000000000293 R12: 00007fff3f8658e8
[ 22.111384][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.111397][ T231]
[ 22.111399][ T231]
[ 22.123389][ T231] The buggy address belongs to the physical page:
[ 22.123766][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009ab1000 pfn:0x9ab0
[ 22.124340][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 22.124635][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 22.125163][ T231] raw: ffff888009ab1000 0000000000000000 00000001ffffffff 0000000000000000
[ 22.125652][ T231] page dumped because: kasan: bad access detected
[ 22.126033][ T231]
[ 22.126179][ T231] Memory state around the buggy address:
[ 22.126487][ T231] ffff888009ab0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.126905][ T231] ffff888009ab0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.127305][ T231] >ffff888009ab0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.127720][ T231] ^
[ 22.127949][ T231] ffff888009ab0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.128367][ T231] ffff888009ab0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.128758][ T231] ==================================================================
[ 22.129416][ T231] Disabling lock debugging due to kernel taint
[ 22.129763][ T231] ------------[ cut here ]------------
[ 22.130025][ T231] refcount_t: underflow; use-after-free.
[ 22.130358][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 22.130865][ T231] Modules linked in:
[ 22.131107][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.131756][ T231] Tainted: [B]=BAD_PAGE
[ 22.131977][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.132335][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 22.132688][ T231] Code: 3f 92 02 80 fb 01 0f 87 bb b9 d9 fe 83 e3 01 0f 85 51 ff ff ff c6 05 5e 3f 92 02 01 90 48 c7 c7 20 8d c5 a4 e8 32 bf 18 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 b0 63 a1 ff e9 ba fe ff ff
[ 22.133644][ T231] RSP: 0018:ffffc90000b37ce8 EFLAGS: 00010282
[ 22.134009][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 22.134432][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 22.134834][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4abe134
[ 22.135220][ T231] R10: 0000000000000003 R11: ffffc90000b37880 R12: 0000000000000001
[ 22.135643][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 22.136038][ T231] FS: 000000003433c3c0(0000) GS:ffff88808f81a000(0000) knlGS:0000000000000000
[ 22.136532][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.136876][ T231] CR2: 00007fab413f9000 CR3: 000000000c2c9001 CR4: 0000000000772ef0
[ 22.137288][ T231] PKRU: 55555554
[ 22.137499][ T231] Call Trace:
[ 22.137691][ T231]
[ 22.137839][ T231] netdev_run_todo+0x5f0/0xc60
[ 22.138178][ T231] ? rtnl_is_locked+0x15/0x20
[ 22.138475][ T231] ? netif_state_change+0x228/0x2c0
[ 22.138783][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.139130][ T231] ? generic_xdp_install+0x410/0x410
[ 22.139398][ T231] ? tun_chr_close+0xae/0x1c0
[ 22.139688][ T231] tun_chr_close+0xc0/0x1c0
[ 22.139962][ T231] __fput+0x35c/0xa70
[ 22.140195][ T231] fput_close_sync+0xdd/0x1b0
[ 22.140466][ T231] ? alloc_file_clone+0xf0/0xf0
[ 22.140795][ T231] __x64_sys_close+0x7d/0xd0
[ 22.141092][ T231] do_syscall_64+0xc1/0xfd0
[ 22.141362][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.141731][ T231] RIP: 0033:0x4901eb
[ 22.141984][ T231] Code: 03 00 00 00 0f 05 48 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 78 04 00 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 21 79 04 00 8b 44
[ 22.143160][ T231] RSP: 002b:00007fff3f865410 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.143558][ T231] RAX: ffffffffffffffda RBX: 00007fff3f865970 RCX: 00000000004901eb
[ 22.144166][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.144613][ T231] RBP: 00007fff3f865450 R08: 0000000000000000 R09: 0000000000000000
[ 22.145033][ T231] R10: 0000000000100000 R11: 0000000000000293 R12: 00007fff3f8658e8
[ 22.145468][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.145930][ T231]
[ 22.146172][ T231] irq event stamp: 1224719
[ 22.146616][ T231] hardirqs last enabled at (1224719): [] irqentry_exit+0x3b/0x80
[ 22.147148][ T231] hardirqs last disabled at (1224718): [] handle_softirqs+0x47f/0x610
[ 22.147795][ T231] softirqs last enabled at (1224436): [] handle_softirqs+0x352/0x610
[ 22.148300][ T231] softirqs last disabled at (1224429): [] irq_exit_rcu+0xab/0x100
[ 22.148759][ T231] ---[ end trace 0000000000000000 ]---