[ 17.193489][ T231] ==================================================================
[ 17.193861][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 17.194085][ T231] Read of size 1 at addr ffff8880085e868c by task packetdrill/231
[ 17.194354][ T231]
[ 17.194445][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.194450][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.194452][ T231] Call Trace:
[ 17.194454][ T231]
[ 17.194456][ T231] dump_stack_lvl+0x82/0xc0
[ 17.194462][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 17.194472][ T231] ? kobject_put+0xbb/0xd0
[ 17.194476][ T231] print_report+0xb4/0x270
[ 17.194479][ T231] ? kobject_put+0xbb/0xd0
[ 17.194482][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 17.194486][ T231] ? kobject_put+0xbb/0xd0
[ 17.194489][ T231] kasan_report+0xca/0x100
[ 17.194493][ T231] ? kobject_put+0xbb/0xd0
[ 17.194498][ T231] kobject_put+0xbb/0xd0
[ 17.194501][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.194508][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.194512][ T231] ? netif_state_change+0x228/0x2c0
[ 17.194516][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.194518][ T231] ? generic_xdp_install+0x410/0x410
[ 17.194523][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.194531][ T231] tun_chr_close+0xc0/0x1c0
[ 17.194535][ T231] __fput+0x35c/0xa70
[ 17.194543][ T231] fput_close_sync+0xdd/0x1b0
[ 17.194546][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.194551][ T231] __x64_sys_close+0x7d/0xd0
[ 17.194555][ T231] do_syscall_64+0xc1/0xfd0
[ 17.194562][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.194567][ T231] RIP: 0033:0x4901eb
[ 17.194571][ 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
[ 17.194574][ T231] RSP: 002b:00007ffee2943900 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.194578][ T231] RAX: ffffffffffffffda RBX: 00007ffee2943e60 RCX: 00000000004901eb
[ 17.194580][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.194582][ T231] RBP: 00007ffee2943940 R08: 0000000000000000 R09: 0000000000000000
[ 17.194584][ T231] R10: 0000000000000004 R11: 0000000000000293 R12: 00007ffee2943dd8
[ 17.194585][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.194592][ T231]
[ 17.194593][ T231]
[ 17.201729][ T231] The buggy address belongs to the physical page:
[ 17.201939][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880085e9300 pfn:0x85e8
[ 17.202284][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 17.202470][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.202775][ T231] raw: ffff8880085e9300 0000000000000000 00000001ffffffff 0000000000000000
[ 17.203077][ T231] page dumped because: kasan: bad access detected
[ 17.203287][ T231]
[ 17.203381][ T231] Memory state around the buggy address:
[ 17.203546][ T231] ffff8880085e8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.203797][ T231] ffff8880085e8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.204046][ T231] >ffff8880085e8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.204298][ T231] ^
[ 17.204481][ T231] ffff8880085e8700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.204728][ T231] ffff8880085e8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.204974][ T231] ==================================================================
[ 17.205378][ T231] Disabling lock debugging due to kernel taint
[ 17.205590][ T231] ------------[ cut here ]------------
[ 17.205746][ T231] refcount_t: underflow; use-after-free.
[ 17.205935][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.206231][ T231] Modules linked in:
[ 17.206379][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.206760][ T231] Tainted: [B]=BAD_PAGE
[ 17.206891][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.207112][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.207344][ 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 8a 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
[ 17.207938][ T231] RSP: 0018:ffffc90000aa7ce8 EFLAGS: 00010282
[ 17.208152][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.208413][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.208672][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff163e134
[ 17.208921][ T231] R10: 0000000000000003 R11: ffffc90000aa7880 R12: 0000000000000001
[ 17.209174][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.209447][ T231] FS: 000000000541b3c0(0000) GS:ffff8880a9c1a000(0000) knlGS:0000000000000000
[ 17.209746][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.209967][ T231] CR2: 00007f4e8bbc6000 CR3: 000000000ab49003 CR4: 0000000000772ef0
[ 17.210220][ T231] PKRU: 55555554
[ 17.210365][ T231] Call Trace:
[ 17.210494][ T231]
[ 17.210580][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.210752][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.210922][ T231] ? netif_state_change+0x228/0x2c0
[ 17.211105][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.211345][ T231] ? generic_xdp_install+0x410/0x410
[ 17.211527][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.211714][ T231] tun_chr_close+0xc0/0x1c0
[ 17.211894][ T231] __fput+0x35c/0xa70
[ 17.212059][ T231] fput_close_sync+0xdd/0x1b0
[ 17.212244][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.212437][ T231] __x64_sys_close+0x7d/0xd0
[ 17.212605][ T231] do_syscall_64+0xc1/0xfd0
[ 17.212776][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.212985][ T231] RIP: 0033:0x4901eb
[ 17.213213][ 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
[ 17.213823][ T231] RSP: 002b:00007ffee2943900 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.214168][ T231] RAX: ffffffffffffffda RBX: 00007ffee2943e60 RCX: 00000000004901eb
[ 17.214439][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.214776][ T231] RBP: 00007ffee2943940 R08: 0000000000000000 R09: 0000000000000000
[ 17.215032][ T231] R10: 0000000000000004 R11: 0000000000000293 R12: 00007ffee2943dd8
[ 17.215279][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.215628][ T231]
[ 17.215754][ T231] irq event stamp: 1896111
[ 17.215923][ T231] hardirqs last enabled at (1896111): [] irqentry_exit+0x3b/0x80
[ 17.216313][ T231] hardirqs last disabled at (1896110): [] handle_softirqs+0x47f/0x610
[ 17.216606][ T231] softirqs last enabled at (1895808): [] handle_softirqs+0x352/0x610
[ 17.216892][ T231] softirqs last disabled at (1895801): [] irq_exit_rcu+0xab/0x100
[ 17.217282][ T231] ---[ end trace 0000000000000000 ]---