[ 17.483169][ T233] ==================================================================
[ 17.483610][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.483925][ T233] Read of size 1 at addr ffff88800503068c by task packetdrill/233
[ 17.484303][ T233]
[ 17.484437][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.484445][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.484449][ T233] Call Trace:
[ 17.484452][ T233]
[ 17.484455][ T233] dump_stack_lvl+0x82/0xc0
[ 17.484463][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 17.484473][ T233] ? kobject_put+0xbb/0xd0
[ 17.484479][ T233] print_report+0xb4/0x270
[ 17.484485][ T233] ? kobject_put+0xbb/0xd0
[ 17.484490][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 17.484496][ T233] ? kobject_put+0xbb/0xd0
[ 17.484502][ T233] kasan_report+0xca/0x100
[ 17.484509][ T233] ? kobject_put+0xbb/0xd0
[ 17.484518][ T233] kobject_put+0xbb/0xd0
[ 17.484524][ T233] netdev_run_todo+0x5f0/0xc60
[ 17.484530][ T233] ? rtnl_is_locked+0x15/0x20
[ 17.484535][ T233] ? netif_state_change+0x228/0x2c0
[ 17.484540][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.484546][ T233] ? generic_xdp_install+0x410/0x410
[ 17.484553][ T233] ? tun_chr_close+0xae/0x1c0
[ 17.484564][ T233] tun_chr_close+0xc0/0x1c0
[ 17.484570][ T233] __fput+0x35c/0xa70
[ 17.484582][ T233] fput_close_sync+0xdd/0x1b0
[ 17.484588][ T233] ? alloc_file_clone+0xf0/0xf0
[ 17.484597][ T233] __x64_sys_close+0x7d/0xd0
[ 17.484603][ T233] do_syscall_64+0xc1/0xfd0
[ 17.484610][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.484616][ T233] RIP: 0033:0x4901eb
[ 17.484622][ T233] 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
[ 17.484627][ T233] RSP: 002b:00007ffecf112160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.484633][ T233] RAX: ffffffffffffffda RBX: 00007ffecf1126c0 RCX: 00000000004901eb
[ 17.484637][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.484640][ T233] RBP: 00007ffecf1121a0 R08: 0000000000000000 R09: 0000000000000000
[ 17.484643][ T233] R10: 0000000011c1a560 R11: 0000000000000293 R12: 00007ffecf112638
[ 17.484646][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.484658][ T233]
[ 17.484661][ T233]
[ 17.495266][ T233] The buggy address belongs to the physical page:
[ 17.495591][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888005031900 pfn:0x5030
[ 17.496118][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 17.496385][ T233] raw: 0080000000000000 ffffea00002ff908 ffff88803633bc40 0000000000000000
[ 17.496836][ T233] raw: ffff888005031900 0000000000000000 00000000ffffffff 0000000000000000
[ 17.497286][ T233] page dumped because: kasan: bad access detected
[ 17.497614][ T233]
[ 17.497745][ T233] Memory state around the buggy address:
[ 17.498005][ T233] ffff888005030580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.498381][ T233] ffff888005030600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.498759][ T233] >ffff888005030680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.499129][ T233] ^
[ 17.499317][ T233] ffff888005030700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.499686][ T233] ffff888005030780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.500056][ T233] ==================================================================
[ 17.500521][ T233] Disabling lock debugging due to kernel taint
[ 17.500884][ T233] ------------[ cut here ]------------
[ 17.501153][ T233] refcount_t: underflow; use-after-free.
[ 17.501631][ T233] WARNING: CPU: 2 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.502123][ T233] Modules linked in:
[ 17.502383][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.503060][ T233] Tainted: [B]=BAD_PAGE
[ 17.503347][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.503727][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.504106][ T233] 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 e5 a0 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
[ 17.505127][ T233] RSP: 0018:ffffc90000af7ce8 EFLAGS: 00010282
[ 17.505521][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.505949][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.506397][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff42fe134
[ 17.506817][ T233] R10: 0000000000000003 R11: ffffc90000af7880 R12: 0000000000000001
[ 17.507270][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.507706][ T233] FS: 0000000011c123c0(0000) GS:ffff88809371a000(0000) knlGS:0000000000000000
[ 17.508215][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.508596][ T233] CR2: 00007fc9e871b000 CR3: 000000000266e001 CR4: 0000000000772ef0
[ 17.509026][ T233] PKRU: 55555554
[ 17.509269][ T233] Call Trace:
[ 17.509498][ T233]
[ 17.509659][ T233] netdev_run_todo+0x5f0/0xc60
[ 17.509973][ T233] ? rtnl_is_locked+0x15/0x20
[ 17.510287][ T233] ? netif_state_change+0x228/0x2c0
[ 17.510585][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.510970][ T233] ? generic_xdp_install+0x410/0x410
[ 17.511277][ T233] ? tun_chr_close+0xae/0x1c0
[ 17.511587][ T233] tun_chr_close+0xc0/0x1c0
[ 17.511880][ T233] __fput+0x35c/0xa70
[ 17.512124][ T233] fput_close_sync+0xdd/0x1b0
[ 17.512430][ T233] ? alloc_file_clone+0xf0/0xf0
[ 17.512728][ T233] __x64_sys_close+0x7d/0xd0
[ 17.513025][ T233] do_syscall_64+0xc1/0xfd0
[ 17.513338][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.513702][ T233] RIP: 0033:0x4901eb
[ 17.513958][ T233] 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
[ 17.514940][ T233] RSP: 002b:00007ffecf112160 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.515362][ T233] RAX: ffffffffffffffda RBX: 00007ffecf1126c0 RCX: 00000000004901eb
[ 17.515765][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.516167][ T233] RBP: 00007ffecf1121a0 R08: 0000000000000000 R09: 0000000000000000
[ 17.516589][ T233] R10: 0000000011c1a560 R11: 0000000000000293 R12: 00007ffecf112638
[ 17.516998][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.517439][ T233]
[ 17.517667][ T233] irq event stamp: 1936791
[ 17.517945][ T233] hardirqs last enabled at (1936791): [] irqentry_exit+0x3b/0x80
[ 17.518424][ T233] hardirqs last disabled at (1936790): [] handle_softirqs+0x47f/0x610
[ 17.518888][ T233] softirqs last enabled at (1936600): [] __tun_set_ebpf+0xc6/0x180
[ 17.519377][ T233] softirqs last disabled at (1936598): [] __tun_set_ebpf+0x91/0x180
[ 17.519840][ T233] ---[ end trace 0000000000000000 ]---