[ 23.215759][ T231] ==================================================================
[ 23.216068][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 23.216274][ T231] Read of size 1 at addr ffff888008fa468c by task packetdrill/231
[ 23.216506][ T231]
[ 23.216603][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.216608][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.216610][ T231] Call Trace:
[ 23.216612][ T231]
[ 23.216614][ T231] dump_stack_lvl+0x82/0xc0
[ 23.216620][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 23.216629][ T231] ? kobject_put+0xbb/0xd0
[ 23.216633][ T231] print_report+0xb4/0x270
[ 23.216636][ T231] ? kobject_put+0xbb/0xd0
[ 23.216639][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 23.216643][ T231] ? kobject_put+0xbb/0xd0
[ 23.216646][ T231] kasan_report+0xca/0x100
[ 23.216650][ T231] ? kobject_put+0xbb/0xd0
[ 23.216655][ T231] kobject_put+0xbb/0xd0
[ 23.216658][ T231] netdev_run_todo+0x5f0/0xc60
[ 23.216665][ T231] ? rtnl_is_locked+0x15/0x20
[ 23.216669][ T231] ? netif_state_change+0x228/0x2c0
[ 23.216672][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 23.216675][ T231] ? generic_xdp_install+0x410/0x410
[ 23.216679][ T231] ? tun_chr_close+0xae/0x1c0
[ 23.216687][ T231] tun_chr_close+0xc0/0x1c0
[ 23.216691][ T231] __fput+0x35c/0xa70
[ 23.216700][ T231] fput_close_sync+0xdd/0x1b0
[ 23.216703][ T231] ? alloc_file_clone+0xf0/0xf0
[ 23.216708][ T231] __x64_sys_close+0x7d/0xd0
[ 23.216712][ T231] do_syscall_64+0xc1/0xfd0
[ 23.216718][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 23.216723][ T231] RIP: 0033:0x4901eb
[ 23.216727][ 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
[ 23.216730][ T231] RSP: 002b:00007fff6f53e9b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 23.216734][ T231] RAX: ffffffffffffffda RBX: 00007fff6f53ef10 RCX: 00000000004901eb
[ 23.216736][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 23.216738][ T231] RBP: 00007fff6f53e9f0 R08: 0000000000000000 R09: 0000000000000000
[ 23.216740][ T231] R10: 0000000001000000 R11: 0000000000000293 R12: 00007fff6f53ee88
[ 23.216742][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 23.216748][ T231]
[ 23.216749][ T231]
[ 23.223275][ T231] The buggy address belongs to the physical page:
[ 23.223469][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8fa4
[ 23.223754][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 23.223931][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 23.224212][ T231] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
[ 23.224488][ T231] page dumped because: kasan: bad access detected
[ 23.224684][ T231]
[ 23.224762][ T231] Memory state around the buggy address:
[ 23.224916][ T231] ffff888008fa4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 23.225148][ T231] ffff888008fa4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 23.225376][ T231] >ffff888008fa4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 23.225608][ T231] ^
[ 23.225761][ T231] ffff888008fa4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 23.226012][ T231] ffff888008fa4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 23.226236][ T231] ==================================================================
[ 23.226492][ T231] Disabling lock debugging due to kernel taint
[ 23.226686][ T231] ------------[ cut here ]------------
[ 23.226839][ T231] refcount_t: underflow; use-after-free.
[ 23.227026][ T231] WARNING: CPU: 3 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 23.227545][ T231] Modules linked in:
[ 23.227669][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 23.228016][ T231] Tainted: [B]=BAD_PAGE
[ 23.228148][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 23.228343][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 23.228541][ 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 25 84 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
[ 23.229097][ T231] RSP: 0018:ffffc90000b07ce8 EFLAGS: 00010282
[ 23.229297][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 23.229531][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 23.229760][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff097e134
[ 23.229991][ T231] R10: 0000000000000003 R11: ffffc90000b07880 R12: 0000000000000001
[ 23.230245][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 23.230477][ T231] FS: 000000002176c3c0(0000) GS:ffff8880b039a000(0000) knlGS:0000000000000000
[ 23.230742][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 23.230936][ T231] CR2: 00007f0494c7c000 CR3: 0000000004ae1003 CR4: 0000000000772ef0
[ 23.231194][ T231] PKRU: 55555554
[ 23.231317][ T231] Call Trace:
[ 23.231433][ T231]
[ 23.231513][ T231] netdev_run_todo+0x5f0/0xc60
[ 23.231687][ T231] ? rtnl_is_locked+0x15/0x20
[ 23.231844][ T231] ? netif_state_change+0x228/0x2c0
[ 23.232018][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 23.232215][ T231] ? generic_xdp_install+0x410/0x410
[ 23.232368][ T231] ? tun_chr_close+0xae/0x1c0
[ 23.232535][ T231] tun_chr_close+0xc0/0x1c0
[ 23.232688][ T231] __fput+0x35c/0xa70
[ 23.232817][ T231] fput_close_sync+0xdd/0x1b0
[ 23.232967][ T231] ? alloc_file_clone+0xf0/0xf0
[ 23.233128][ T231] __x64_sys_close+0x7d/0xd0
[ 23.233288][ T231] do_syscall_64+0xc1/0xfd0
[ 23.233444][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 23.233640][ T231] RIP: 0033:0x4901eb
[ 23.233778][ 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
[ 23.234354][ T231] RSP: 002b:00007fff6f53e9b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 23.234592][ T231] RAX: ffffffffffffffda RBX: 00007fff6f53ef10 RCX: 00000000004901eb
[ 23.234831][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 23.235078][ T231] RBP: 00007fff6f53e9f0 R08: 0000000000000000 R09: 0000000000000000
[ 23.235313][ T231] R10: 0000000001000000 R11: 0000000000000293 R12: 00007fff6f53ee88
[ 23.235550][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 23.235796][ T231]
[ 23.235920][ T231] irq event stamp: 2071221
[ 23.236095][ T231] hardirqs last enabled at (2071221): [] irqentry_exit+0x3b/0x80
[ 23.236378][ T231] hardirqs last disabled at (2071220): [] handle_softirqs+0x47f/0x610
[ 23.236655][ T231] softirqs last enabled at (2071032): [] __tun_set_ebpf+0xc6/0x180
[ 23.236930][ T231] softirqs last disabled at (2071030): [] __tun_set_ebpf+0x91/0x180
[ 23.237209][ T231] ---[ end trace 0000000000000000 ]---