[ 18.109178][ T232] ==================================================================
[ 18.109501][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 18.109734][ T232] Read of size 1 at addr ffff88800c3e468c by task packetdrill/232
[ 18.109996][ T232]
[ 18.110088][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.110093][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.110095][ T232] Call Trace:
[ 18.110098][ T232]
[ 18.110099][ T232] dump_stack_lvl+0x82/0xc0
[ 18.110106][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 18.110112][ T232] ? kobject_put+0xbb/0xd0
[ 18.110116][ T232] print_report+0xb4/0x270
[ 18.110120][ T232] ? kobject_put+0xbb/0xd0
[ 18.110123][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 18.110127][ T232] ? kobject_put+0xbb/0xd0
[ 18.110130][ T232] kasan_report+0xca/0x100
[ 18.110133][ T232] ? kobject_put+0xbb/0xd0
[ 18.110139][ T232] kobject_put+0xbb/0xd0
[ 18.110143][ T232] netdev_run_todo+0x5f0/0xc60
[ 18.110148][ T232] ? rtnl_is_locked+0x15/0x20
[ 18.110151][ T232] ? netif_state_change+0x228/0x2c0
[ 18.110154][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.110157][ T232] ? generic_xdp_install+0x410/0x410
[ 18.110161][ T232] ? tun_chr_close+0xae/0x1c0
[ 18.110168][ T232] tun_chr_close+0xc0/0x1c0
[ 18.110171][ T232] __fput+0x35c/0xa70
[ 18.110179][ T232] fput_close_sync+0xdd/0x1b0
[ 18.110182][ T232] ? alloc_file_clone+0xf0/0xf0
[ 18.110187][ T232] __x64_sys_close+0x7d/0xd0
[ 18.110190][ T232] do_syscall_64+0xc1/0xfd0
[ 18.110196][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.110200][ T232] RIP: 0033:0x4901eb
[ 18.110204][ T232] 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
[ 18.110206][ T232] RSP: 002b:00007ffc9389e680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.110210][ T232] RAX: ffffffffffffffda RBX: 00007ffc9389ebe0 RCX: 00000000004901eb
[ 18.110212][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.110214][ T232] RBP: 00007ffc9389e6c0 R08: 0000000000000000 R09: 0000000000000000
[ 18.110216][ T232] R10: 000000003af90e70 R11: 0000000000000293 R12: 00007ffc9389eb58
[ 18.110218][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.110224][ T232]
[ 18.110225][ T232]
[ 18.118085][ T232] The buggy address belongs to the physical page:
[ 18.118320][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88800c3e7400 pfn:0xc3e4
[ 18.118723][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 18.118983][ T232] raw: 0080000000000000 ffffea0000139308 ffff88803623bc40 0000000000000000
[ 18.119294][ T232] raw: ffff88800c3e7400 0000000000000000 00000000ffffffff 0000000000000000
[ 18.119576][ T232] page dumped because: kasan: bad access detected
[ 18.119815][ T232]
[ 18.119893][ T232] Memory state around the buggy address:
[ 18.120055][ T232] ffff88800c3e4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.120288][ T232] ffff88800c3e4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.120512][ T232] >ffff88800c3e4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.120771][ T232] ^
[ 18.120894][ T232] ffff88800c3e4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.121131][ T232] ffff88800c3e4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.121387][ T232] ==================================================================
[ 18.121793][ T232] Disabling lock debugging due to kernel taint
[ 18.121998][ T232] ------------[ cut here ]------------
[ 18.122150][ T232] refcount_t: underflow; use-after-free.
[ 18.122353][ T232] WARNING: CPU: 0 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 18.122626][ T232] Modules linked in:
[ 18.122769][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.123188][ T232] Tainted: [B]=BAD_PAGE
[ 18.123310][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.123513][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 18.123733][ T232] 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 a5 b7 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
[ 18.124343][ T232] RSP: 0018:ffffc90000a97ce8 EFLAGS: 00010282
[ 18.124552][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 18.124851][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 18.125123][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff707e134
[ 18.125375][ T232] R10: 0000000000000003 R11: ffffc90000a97880 R12: 0000000000000001
[ 18.125654][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 18.125912][ T232] FS: 000000003af893c0(0000) GS:ffff88807ca1a000(0000) knlGS:0000000000000000
[ 18.126223][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 18.126421][ T232] CR2: 00007ff0d3fe2000 CR3: 0000000004b7a002 CR4: 0000000000772ef0
[ 18.126670][ T232] PKRU: 55555554
[ 18.126816][ T232] Call Trace:
[ 18.126942][ T232]
[ 18.127045][ T232] netdev_run_todo+0x5f0/0xc60
[ 18.127236][ T232] ? rtnl_is_locked+0x15/0x20
[ 18.127407][ T232] ? netif_state_change+0x228/0x2c0
[ 18.127585][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.127829][ T232] ? generic_xdp_install+0x410/0x410
[ 18.128001][ T232] ? tun_chr_close+0xae/0x1c0
[ 18.128180][ T232] tun_chr_close+0xc0/0x1c0
[ 18.128346][ T232] __fput+0x35c/0xa70
[ 18.128495][ T232] fput_close_sync+0xdd/0x1b0
[ 18.128674][ T232] ? alloc_file_clone+0xf0/0xf0
[ 18.128845][ T232] __x64_sys_close+0x7d/0xd0
[ 18.129010][ T232] do_syscall_64+0xc1/0xfd0
[ 18.129186][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.129398][ T232] RIP: 0033:0x4901eb
[ 18.129543][ T232] 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
[ 18.130210][ T232] RSP: 002b:00007ffc9389e680 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.130478][ T232] RAX: ffffffffffffffda RBX: 00007ffc9389ebe0 RCX: 00000000004901eb
[ 18.130784][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.131063][ T232] RBP: 00007ffc9389e6c0 R08: 0000000000000000 R09: 0000000000000000
[ 18.131367][ T232] R10: 000000003af90e70 R11: 0000000000000293 R12: 00007ffc9389eb58
[ 18.131655][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.131963][ T232]
[ 18.132133][ T232] irq event stamp: 1926761
[ 18.132315][ T232] hardirqs last enabled at (1926761): [] irqentry_exit+0x3b/0x80
[ 18.132649][ T232] hardirqs last disabled at (1926760): [] handle_softirqs+0x47f/0x610
[ 18.132973][ T232] softirqs last enabled at (1926472): [] handle_softirqs+0x352/0x610
[ 18.133313][ T232] softirqs last disabled at (1926463): [] irq_exit_rcu+0xab/0x100
[ 18.133631][ T232] ---[ end trace 0000000000000000 ]---