[ 15.889292][ T231] ==================================================================
[ 15.889608][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 15.889832][ T231] Read of size 1 at addr ffff8880082ec68c by task packetdrill/231
[ 15.890080][ T231]
[ 15.890173][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.890178][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.890181][ T231] Call Trace:
[ 15.890183][ T231]
[ 15.890185][ T231] dump_stack_lvl+0x82/0xc0
[ 15.890191][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 15.890199][ T231] ? kobject_put+0xbb/0xd0
[ 15.890203][ T231] print_report+0xb4/0x270
[ 15.890207][ T231] ? kobject_put+0xbb/0xd0
[ 15.890210][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 15.890214][ T231] ? kobject_put+0xbb/0xd0
[ 15.890217][ T231] kasan_report+0xca/0x100
[ 15.890221][ T231] ? kobject_put+0xbb/0xd0
[ 15.890227][ T231] kobject_put+0xbb/0xd0
[ 15.890230][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.890236][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.890240][ T231] ? netif_state_change+0x228/0x2c0
[ 15.890243][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.890246][ T231] ? generic_xdp_install+0x410/0x410
[ 15.890250][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.890258][ T231] tun_chr_close+0xc0/0x1c0
[ 15.890262][ T231] __fput+0x35c/0xa70
[ 15.890270][ T231] fput_close_sync+0xdd/0x1b0
[ 15.890273][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.890278][ T231] __x64_sys_close+0x7d/0xd0
[ 15.890282][ T231] do_syscall_64+0xc1/0xfd0
[ 15.890288][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.890294][ T231] RIP: 0033:0x4901eb
[ 15.890298][ 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
[ 15.890301][ T231] RSP: 002b:00007ffc95790370 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.890305][ T231] RAX: ffffffffffffffda RBX: 00007ffc957908d0 RCX: 00000000004901eb
[ 15.890308][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.890310][ T231] RBP: 00007ffc957903b0 R08: 0000000000000000 R09: 0000000000000000
[ 15.890311][ T231] R10: 0000000000000002 R11: 0000000000000293 R12: 00007ffc95790848
[ 15.890313][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.890319][ T231]
[ 15.890320][ T231]
[ 15.897231][ T231] The buggy address belongs to the physical page:
[ 15.897439][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x82ec
[ 15.897741][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 15.897915][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 15.898227][ T231] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
[ 15.898535][ T231] page dumped because: kasan: bad access detected
[ 15.898746][ T231]
[ 15.898834][ T231] Memory state around the buggy address:
[ 15.899004][ T231] ffff8880082ec580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.899263][ T231] ffff8880082ec600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.899512][ T231] >ffff8880082ec680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.899761][ T231] ^
[ 15.899925][ T231] ffff8880082ec700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.900178][ T231] ffff8880082ec780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.900428][ T231] ==================================================================
[ 15.900753][ T231] Disabling lock debugging due to kernel taint
[ 15.900961][ T231] ------------[ cut here ]------------
[ 15.901134][ T231] refcount_t: underflow; use-after-free.
[ 15.901337][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.901626][ T231] Modules linked in:
[ 15.901760][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.902151][ T231] Tainted: [B]=BAD_PAGE
[ 15.902282][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.902491][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.902711][ 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 85 9b 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
[ 15.903315][ T231] RSP: 0018:ffffc90000ad7ce8 EFLAGS: 00010282
[ 15.903529][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.903789][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.904045][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff383e134
[ 15.904313][ T231] R10: 0000000000000003 R11: ffffc90000ad7880 R12: 0000000000000001
[ 15.904563][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.904814][ T231] FS: 000000003e1e83c0(0000) GS:ffff888098c1a000(0000) knlGS:0000000000000000
[ 15.905120][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.905334][ T231] CR2: 00007f738a4a4000 CR3: 00000000086d6002 CR4: 0000000000772ef0
[ 15.905597][ T231] PKRU: 55555554
[ 15.905811][ T231] Call Trace:
[ 15.905939][ T231]
[ 15.906026][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.906205][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.906375][ T231] ? netif_state_change+0x228/0x2c0
[ 15.906631][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.906839][ T231] ? generic_xdp_install+0x410/0x410
[ 15.907007][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.907188][ T231] tun_chr_close+0xc0/0x1c0
[ 15.907447][ T231] __fput+0x35c/0xa70
[ 15.907577][ T231] fput_close_sync+0xdd/0x1b0
[ 15.907740][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.907912][ T231] __x64_sys_close+0x7d/0xd0
[ 15.908171][ T231] do_syscall_64+0xc1/0xfd0
[ 15.908341][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.908546][ T231] RIP: 0033:0x4901eb
[ 15.908678][ 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
[ 15.909378][ T231] RSP: 002b:00007ffc95790370 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.909724][ T231] RAX: ffffffffffffffda RBX: 00007ffc957908d0 RCX: 00000000004901eb
[ 15.909984][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.910239][ T231] RBP: 00007ffc957903b0 R08: 0000000000000000 R09: 0000000000000000
[ 15.910573][ T231] R10: 0000000000000002 R11: 0000000000000293 R12: 00007ffc95790848
[ 15.910821][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.911078][ T231]
[ 15.911215][ T231] irq event stamp: 2035761
[ 15.911381][ T231] hardirqs last enabled at (2035761): [] irqentry_exit+0x3b/0x80
[ 15.911667][ T231] hardirqs last disabled at (2035760): [] handle_softirqs+0x47f/0x610
[ 15.912036][ T231] softirqs last enabled at (2035560): [] handle_softirqs+0x352/0x610
[ 15.912334][ T231] softirqs last disabled at (2035553): [] irq_exit_rcu+0xab/0x100
[ 15.912705][ T231] ---[ end trace 0000000000000000 ]---