[ 15.907968][ T231] ==================================================================
[ 15.908251][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 15.908448][ T231] Read of size 1 at addr ffff888009d9c68c by task packetdrill/231
[ 15.908690][ T231]
[ 15.908774][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.908779][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.908782][ T231] Call Trace:
[ 15.908784][ T231]
[ 15.908786][ T231] dump_stack_lvl+0x82/0xc0
[ 15.908792][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 15.908800][ T231] ? kobject_put+0xbb/0xd0
[ 15.908804][ T231] print_report+0xb4/0x270
[ 15.908808][ T231] ? kobject_put+0xbb/0xd0
[ 15.908811][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 15.908814][ T231] ? kobject_put+0xbb/0xd0
[ 15.908818][ T231] kasan_report+0xca/0x100
[ 15.908821][ T231] ? kobject_put+0xbb/0xd0
[ 15.908827][ T231] kobject_put+0xbb/0xd0
[ 15.908830][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.908836][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.908840][ T231] ? netif_state_change+0x228/0x2c0
[ 15.908843][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.908846][ T231] ? generic_xdp_install+0x410/0x410
[ 15.908850][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.908859][ T231] tun_chr_close+0xc0/0x1c0
[ 15.908863][ T231] __fput+0x35c/0xa70
[ 15.908871][ T231] fput_close_sync+0xdd/0x1b0
[ 15.908875][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.908879][ T231] __x64_sys_close+0x7d/0xd0
[ 15.908883][ T231] do_syscall_64+0xc1/0xfd0
[ 15.908890][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.908895][ T231] RIP: 0033:0x4901eb
[ 15.908898][ 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
[ 15.908901][ T231] RSP: 002b:00007ffc991e97f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.908905][ T231] RAX: ffffffffffffffda RBX: 00007ffc991e9d50 RCX: 00000000004901eb
[ 15.908907][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.908909][ T231] RBP: 00007ffc991e9830 R08: 0000000000000000 R09: 0000000000000000
[ 15.908911][ T231] R10: 0000000000000040 R11: 0000000000000293 R12: 00007ffc991e9cc8
[ 15.908913][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.908919][ T231]
[ 15.908920][ T231]
[ 15.915354][ T231] The buggy address belongs to the physical page:
[ 15.915546][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888009d9c040 pfn:0x9d9c
[ 15.915885][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 15.916050][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 15.916333][ T231] raw: ffff888009d9c040 0000000000000000 00000001ffffffff 0000000000000000
[ 15.916621][ T231] page dumped because: kasan: bad access detected
[ 15.916824][ T231]
[ 15.916902][ T231] Memory state around the buggy address:
[ 15.917050][ T231] ffff888009d9c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.917279][ T231] ffff888009d9c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.917507][ T231] >ffff888009d9c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.917754][ T231] ^
[ 15.917917][ T231] ffff888009d9c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.918150][ T231] ffff888009d9c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.918374][ T231] ==================================================================
[ 15.918628][ T231] Disabling lock debugging due to kernel taint
[ 15.918825][ T231] ------------[ cut here ]------------
[ 15.918969][ T231] refcount_t: underflow; use-after-free.
[ 15.919138][ T231] WARNING: CPU: 1 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.919584][ T231] Modules linked in:
[ 15.919720][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.920077][ T231] Tainted: [B]=BAD_PAGE
[ 15.920204][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.920394][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.920604][ 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 86 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
[ 15.921186][ T231] RSP: 0018:ffffc90000b17ce8 EFLAGS: 00010282
[ 15.921380][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.921618][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.921857][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0e3e134
[ 15.922087][ T231] R10: 0000000000000003 R11: ffffc90000b17880 R12: 0000000000000001
[ 15.922320][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.922547][ T231] FS: 000000002b4563c0(0000) GS:ffff8880adc9a000(0000) knlGS:0000000000000000
[ 15.922839][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.923031][ T231] CR2: 00007fe903430000 CR3: 00000000094f2002 CR4: 0000000000772ef0
[ 15.923268][ T231] PKRU: 55555554
[ 15.923383][ T231] Call Trace:
[ 15.923497][ T231]
[ 15.923586][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.923761][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.923916][ T231] ? netif_state_change+0x228/0x2c0
[ 15.924071][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.924270][ T231] ? generic_xdp_install+0x410/0x410
[ 15.924421][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.924577][ T231] tun_chr_close+0xc0/0x1c0
[ 15.924740][ T231] __fput+0x35c/0xa70
[ 15.924859][ T231] fput_close_sync+0xdd/0x1b0
[ 15.925009][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.925169][ T231] __x64_sys_close+0x7d/0xd0
[ 15.925324][ T231] do_syscall_64+0xc1/0xfd0
[ 15.925486][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.925689][ T231] RIP: 0033:0x4901eb
[ 15.925810][ 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
[ 15.926440][ T231] RSP: 002b:00007ffc991e97f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.926688][ T231] RAX: ffffffffffffffda RBX: 00007ffc991e9d50 RCX: 00000000004901eb
[ 15.926914][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.927232][ T231] RBP: 00007ffc991e9830 R08: 0000000000000000 R09: 0000000000000000
[ 15.927457][ T231] R10: 0000000000000040 R11: 0000000000000293 R12: 00007ffc991e9cc8
[ 15.927783][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.928012][ T231]
[ 15.928125][ T231] irq event stamp: 1769561
[ 15.928278][ T231] hardirqs last enabled at (1769561): [] irqentry_exit+0x3b/0x80
[ 15.928638][ T231] hardirqs last disabled at (1769560): [] handle_softirqs+0x47f/0x610
[ 15.928905][ T231] softirqs last enabled at (1769362): [] __tun_set_ebpf+0xc6/0x180
[ 15.929254][ T231] softirqs last disabled at (1769360): [] __tun_set_ebpf+0x91/0x180
[ 15.929512][ T231] ---[ end trace 0000000000000000 ]---