[ 19.125947][ T231] ==================================================================
[ 19.126317][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 19.126565][ T231] Read of size 1 at addr ffff888008b2468c by task packetdrill/231
[ 19.126858][ T231]
[ 19.126960][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.126966][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.126969][ T231] Call Trace:
[ 19.126971][ T231]
[ 19.126973][ T231] dump_stack_lvl+0x82/0xc0
[ 19.126982][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 19.126990][ T231] ? kobject_put+0xbb/0xd0
[ 19.126995][ T231] print_report+0xb4/0x270
[ 19.126999][ T231] ? kobject_put+0xbb/0xd0
[ 19.127002][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 19.127005][ T231] ? kobject_put+0xbb/0xd0
[ 19.127009][ T231] kasan_report+0xca/0x100
[ 19.127013][ T231] ? kobject_put+0xbb/0xd0
[ 19.127018][ T231] kobject_put+0xbb/0xd0
[ 19.127021][ T231] netdev_run_todo+0x5f0/0xc60
[ 19.127027][ T231] ? rtnl_is_locked+0x15/0x20
[ 19.127032][ T231] ? netif_state_change+0x228/0x2c0
[ 19.127035][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.127038][ T231] ? generic_xdp_install+0x410/0x410
[ 19.127042][ T231] ? tun_chr_close+0xae/0x1c0
[ 19.127050][ T231] tun_chr_close+0xc0/0x1c0
[ 19.127054][ T231] __fput+0x35c/0xa70
[ 19.127062][ T231] fput_close_sync+0xdd/0x1b0
[ 19.127066][ T231] ? alloc_file_clone+0xf0/0xf0
[ 19.127070][ T231] __x64_sys_close+0x7d/0xd0
[ 19.127074][ T231] do_syscall_64+0xc1/0xfd0
[ 19.127080][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.127085][ T231] RIP: 0033:0x4901eb
[ 19.127090][ 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
[ 19.127093][ T231] RSP: 002b:00007ffca17cf5f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.127098][ T231] RAX: ffffffffffffffda RBX: 00007ffca17cfb50 RCX: 00000000004901eb
[ 19.127102][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.127104][ T231] RBP: 00007ffca17cf630 R08: 0000000000000000 R09: 0000000000000000
[ 19.127106][ T231] R10: 0000000000000007 R11: 0000000000000293 R12: 00007ffca17cfac8
[ 19.127109][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.127119][ T231]
[ 19.127121][ T231]
[ 19.134745][ T231] The buggy address belongs to the physical page:
[ 19.134981][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008b24700 pfn:0x8b24
[ 19.135357][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 19.135570][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 19.135890][ T231] raw: ffff888008b24700 0000000000000000 00000001ffffffff 0000000000000000
[ 19.136224][ T231] page dumped because: kasan: bad access detected
[ 19.136468][ T231]
[ 19.136573][ T231] Memory state around the buggy address:
[ 19.136751][ T231] ffff888008b24580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.137009][ T231] ffff888008b24600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.137277][ T231] >ffff888008b24680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.137550][ T231] ^
[ 19.137730][ T231] ffff888008b24700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.137999][ T231] ffff888008b24780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.138263][ T231] ==================================================================
[ 19.138622][ T231] Disabling lock debugging due to kernel taint
[ 19.138874][ T231] ------------[ cut here ]------------
[ 19.139071][ T231] refcount_t: underflow; use-after-free.
[ 19.139512][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.139862][ T231] Modules linked in:
[ 19.140033][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.140502][ T231] Tainted: [B]=BAD_PAGE
[ 19.140666][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.140904][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.141177][ 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 96 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
[ 19.141850][ T231] RSP: 0018:ffffc90000a87ce8 EFLAGS: 00010282
[ 19.142131][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.142434][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.142834][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff2e3e134
[ 19.143147][ T231] R10: 0000000000000003 R11: ffffc90000a87880 R12: 0000000000000001
[ 19.143453][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.143834][ T231] FS: 0000000032b1d3c0(0000) GS:ffff88809dd1a000(0000) knlGS:0000000000000000
[ 19.144206][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.144576][ T231] CR2: 00007f6add222000 CR3: 00000000090fb003 CR4: 0000000000772ef0
[ 19.144870][ T231] PKRU: 55555554
[ 19.145053][ T231] Call Trace:
[ 19.145257][ T231]
[ 19.145368][ T231] netdev_run_todo+0x5f0/0xc60
[ 19.145690][ T231] ? rtnl_is_locked+0x15/0x20
[ 19.145889][ T231] ? netif_state_change+0x228/0x2c0
[ 19.146094][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.146359][ T231] ? generic_xdp_install+0x410/0x410
[ 19.146677][ T231] ? tun_chr_close+0xae/0x1c0
[ 19.146880][ T231] tun_chr_close+0xc0/0x1c0
[ 19.147076][ T231] __fput+0x35c/0xa70
[ 19.147272][ T231] fput_close_sync+0xdd/0x1b0
[ 19.147572][ T231] ? alloc_file_clone+0xf0/0xf0
[ 19.147772][ T231] __x64_sys_close+0x7d/0xd0
[ 19.147990][ T231] do_syscall_64+0xc1/0xfd0
[ 19.148201][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.148559][ T231] RIP: 0033:0x4901eb
[ 19.148740][ 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
[ 19.149511][ T231] RSP: 002b:00007ffca17cf5f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.149807][ T231] RAX: ffffffffffffffda RBX: 00007ffca17cfb50 RCX: 00000000004901eb
[ 19.150214][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.150504][ T231] RBP: 00007ffca17cf630 R08: 0000000000000000 R09: 0000000000000000
[ 19.150784][ T231] R10: 0000000000000007 R11: 0000000000000293 R12: 00007ffca17cfac8
[ 19.151191][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.151503][ T231]
[ 19.151660][ T231] irq event stamp: 1988517
[ 19.151870][ T231] hardirqs last enabled at (1988517): [] irqentry_exit+0x3b/0x80
[ 19.152333][ T231] hardirqs last disabled at (1988516): [] handle_softirqs+0x47f/0x610
[ 19.152689][ T231] softirqs last enabled at (1988326): [] __tun_set_ebpf+0xc6/0x180
[ 19.153193][ T231] softirqs last disabled at (1988324): [] __tun_set_ebpf+0x91/0x180
[ 19.153558][ T231] ---[ end trace 0000000000000000 ]---