[ 16.196182][ T231] ==================================================================
[ 16.196475][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.196694][ T231] Read of size 1 at addr ffff88800500868c by task packetdrill/231
[ 16.196937][ T231]
[ 16.197020][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.197026][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.197028][ T231] Call Trace:
[ 16.197031][ T231]
[ 16.197033][ T231] dump_stack_lvl+0x82/0xc0
[ 16.197039][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.197047][ T231] ? kobject_put+0xbb/0xd0
[ 16.197051][ T231] print_report+0xb4/0x270
[ 16.197054][ T231] ? kobject_put+0xbb/0xd0
[ 16.197057][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.197061][ T231] ? kobject_put+0xbb/0xd0
[ 16.197064][ T231] kasan_report+0xca/0x100
[ 16.197068][ T231] ? kobject_put+0xbb/0xd0
[ 16.197074][ T231] kobject_put+0xbb/0xd0
[ 16.197077][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.197083][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.197087][ T231] ? netif_state_change+0x228/0x2c0
[ 16.197090][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.197093][ T231] ? generic_xdp_install+0x410/0x410
[ 16.197097][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.197105][ T231] tun_chr_close+0xc0/0x1c0
[ 16.197109][ T231] __fput+0x35c/0xa70
[ 16.197117][ T231] fput_close_sync+0xdd/0x1b0
[ 16.197121][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.197126][ T231] __x64_sys_close+0x7d/0xd0
[ 16.197134][ T231] do_syscall_64+0xc1/0xfd0
[ 16.197140][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.197145][ T231] RIP: 0033:0x4901eb
[ 16.197150][ 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
[ 16.197152][ T231] RSP: 002b:00007fff9d112d10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.197156][ T231] RAX: ffffffffffffffda RBX: 00007fff9d113270 RCX: 00000000004901eb
[ 16.197159][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.197160][ T231] RBP: 00007fff9d112d50 R08: 0000000000000000 R09: 0000000000000000
[ 16.197162][ T231] R10: 00000000173ab160 R11: 0000000000000293 R12: 00007fff9d1131e8
[ 16.197164][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.197170][ T231]
[ 16.197172][ T231]
[ 16.203838][ T231] The buggy address belongs to the physical page:
[ 16.204048][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800500b100 pfn:0x5008
[ 16.204377][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.204545][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.204840][ T231] raw: ffff88800500b100 0000000000000000 00000001ffffffff 0000000000000000
[ 16.205134][ T231] page dumped because: kasan: bad access detected
[ 16.205335][ T231]
[ 16.205416][ T231] Memory state around the buggy address:
[ 16.205571][ T231] ffff888005008580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.205814][ T231] ffff888005008600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.206056][ T231] >ffff888005008680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.206297][ T231] ^
[ 16.206418][ T231] ffff888005008700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.206653][ T231] ffff888005008780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.206892][ T231] ==================================================================
[ 16.207147][ T231] Disabling lock debugging due to kernel taint
[ 16.207345][ T231] ------------[ cut here ]------------
[ 16.207501][ T231] refcount_t: underflow; use-after-free.
[ 16.207699][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.207993][ T231] Modules linked in:
[ 16.208127][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.208527][ T231] Tainted: [B]=BAD_PAGE
[ 16.208655][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.208857][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.209081][ 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 05 a3 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
[ 16.209660][ T231] RSP: 0018:ffffc90000b67ce8 EFLAGS: 00010282
[ 16.209870][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.210110][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.210353][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff473e134
[ 16.210591][ T231] R10: 0000000000000003 R11: ffffc90000b67880 R12: 0000000000000001
[ 16.210834][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.211085][ T231] FS: 000000001739e3c0(0000) GS:ffff88809141a000(0000) knlGS:0000000000000000
[ 16.211372][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.211574][ T231] CR2: 00007f154c1c9000 CR3: 0000000005084002 CR4: 0000000000772ef0
[ 16.211819][ T231] PKRU: 55555554
[ 16.211953][ T231] Call Trace:
[ 16.212074][ T231]
[ 16.212167][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.212330][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.212493][ T231] ? netif_state_change+0x228/0x2c0
[ 16.212654][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.212852][ T231] ? generic_xdp_install+0x410/0x410
[ 16.213019][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.213188][ T231] tun_chr_close+0xc0/0x1c0
[ 16.213347][ T231] __fput+0x35c/0xa70
[ 16.213481][ T231] fput_close_sync+0xdd/0x1b0
[ 16.213636][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.213797][ T231] __x64_sys_close+0x7d/0xd0
[ 16.213957][ T231] do_syscall_64+0xc1/0xfd0
[ 16.214120][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.214322][ T231] RIP: 0033:0x4901eb
[ 16.214451][ 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
[ 16.215021][ T231] RSP: 002b:00007fff9d112d10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.215268][ T231] RAX: ffffffffffffffda RBX: 00007fff9d113270 RCX: 00000000004901eb
[ 16.215505][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.215747][ T231] RBP: 00007fff9d112d50 R08: 0000000000000000 R09: 0000000000000000
[ 16.215989][ T231] R10: 00000000173ab160 R11: 0000000000000293 R12: 00007fff9d1131e8
[ 16.216235][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.216476][ T231]
[ 16.216595][ T231] irq event stamp: 2154817
[ 16.216760][ T231] hardirqs last enabled at (2154817): [] irqentry_exit+0x3b/0x80
[ 16.217050][ T231] hardirqs last disabled at (2154816): [] handle_softirqs+0x47f/0x610
[ 16.217331][ T231] softirqs last enabled at (2154768): [] handle_softirqs+0x352/0x610
[ 16.217599][ T231] softirqs last disabled at (2154761): [] irq_exit_rcu+0xab/0x100
[ 16.217884][ T231] ---[ end trace 0000000000000000 ]---