[ 21.590346][ T233] ==================================================================
[ 21.590823][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 21.591158][ T233] Read of size 1 at addr ffff88800505c68c by task packetdrill/233
[ 21.591555][ T233]
[ 21.591733][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.591741][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.591746][ T233] Call Trace:
[ 21.591749][ T233]
[ 21.591752][ T233] dump_stack_lvl+0x82/0xc0
[ 21.591764][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 21.591775][ T233] ? kobject_put+0xbb/0xd0
[ 21.591782][ T233] print_report+0xb4/0x270
[ 21.591788][ T233] ? kobject_put+0xbb/0xd0
[ 21.591793][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 21.591800][ T233] ? kobject_put+0xbb/0xd0
[ 21.591805][ T233] kasan_report+0xca/0x100
[ 21.591812][ T233] ? kobject_put+0xbb/0xd0
[ 21.591822][ T233] kobject_put+0xbb/0xd0
[ 21.591827][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.591835][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.591839][ T233] ? netif_state_change+0x228/0x2c0
[ 21.591845][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.591850][ T233] ? generic_xdp_install+0x410/0x410
[ 21.591857][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.591869][ T233] tun_chr_close+0xc0/0x1c0
[ 21.591876][ T233] __fput+0x35c/0xa70
[ 21.591889][ T233] fput_close_sync+0xdd/0x1b0
[ 21.591895][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.591905][ T233] __x64_sys_close+0x7d/0xd0
[ 21.591911][ T233] do_syscall_64+0xc1/0xfd0
[ 21.591918][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.591925][ T233] RIP: 0033:0x4901eb
[ 21.591932][ 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
[ 21.591936][ T233] RSP: 002b:00007ffc81a9c930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.591943][ T233] RAX: ffffffffffffffda RBX: 00007ffc81a9ce90 RCX: 00000000004901eb
[ 21.591947][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.591950][ T233] RBP: 00007ffc81a9c970 R08: 0000000000000000 R09: 0000000000000000
[ 21.591953][ T233] R10: 00000000219cc690 R11: 0000000000000293 R12: 00007ffc81a9ce08
[ 21.591956][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.591969][ T233]
[ 21.591971][ T233]
[ 21.603026][ T233] The buggy address belongs to the physical page:
[ 21.603355][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x505c
[ 21.603846][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 21.604117][ T233] raw: 0080000000000000 ffffea00002ea208 ffff88803633bc40 0000000000000000
[ 21.604583][ T233] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 21.605025][ T233] page dumped because: kasan: bad access detected
[ 21.605357][ T233]
[ 21.605517][ T233] Memory state around the buggy address:
[ 21.605786][ T233] ffff88800505c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.606188][ T233] ffff88800505c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.606584][ T233] >ffff88800505c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.606985][ T233] ^
[ 21.607195][ T233] ffff88800505c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.607594][ T233] ffff88800505c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.607982][ T233] ==================================================================
[ 21.608794][ T233] Disabling lock debugging due to kernel taint
[ 21.609168][ T233] ------------[ cut here ]------------
[ 21.609469][ T233] refcount_t: underflow; use-after-free.
[ 21.609794][ T233] WARNING: CPU: 2 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.610281][ T233] Modules linked in:
[ 21.610516][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.611122][ T233] Tainted: [B]=BAD_PAGE
[ 21.611376][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.611740][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.612110][ 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 65 8c 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
[ 21.613102][ T233] RSP: 0018:ffffc90000a97ce8 EFLAGS: 00010282
[ 21.613475][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.613869][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.614290][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff19fe134
[ 21.614730][ T233] R10: 0000000000000003 R11: ffffc90000a97880 R12: 0000000000000001
[ 21.615168][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.615619][ T233] FS: 00000000219c63c0(0000) GS:ffff8880a7f1a000(0000) knlGS:0000000000000000
[ 21.616117][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.616495][ T233] CR2: 00007fe303f5a000 CR3: 000000000c0a3003 CR4: 0000000000772ef0
[ 21.616933][ T233] PKRU: 55555554
[ 21.617170][ T233] Call Trace:
[ 21.617415][ T233]
[ 21.617579][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.617871][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.618177][ T233] ? netif_state_change+0x228/0x2c0
[ 21.618487][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.618834][ T233] ? generic_xdp_install+0x410/0x410
[ 21.619120][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.619424][ T233] tun_chr_close+0xc0/0x1c0
[ 21.619721][ T233] __fput+0x35c/0xa70
[ 21.619950][ T233] fput_close_sync+0xdd/0x1b0
[ 21.620240][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.620519][ T233] __x64_sys_close+0x7d/0xd0
[ 21.620805][ T233] do_syscall_64+0xc1/0xfd0
[ 21.621087][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.621440][ T233] RIP: 0033:0x4901eb
[ 21.621677][ 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
[ 21.622648][ T233] RSP: 002b:00007ffc81a9c930 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.623065][ T233] RAX: ffffffffffffffda RBX: 00007ffc81a9ce90 RCX: 00000000004901eb
[ 21.623494][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.623918][ T233] RBP: 00007ffc81a9c970 R08: 0000000000000000 R09: 0000000000000000
[ 21.624359][ T233] R10: 00000000219cc690 R11: 0000000000000293 R12: 00007ffc81a9ce08
[ 21.624785][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.625221][ T233]
[ 21.625448][ T233] irq event stamp: 1135147
[ 21.625736][ T233] hardirqs last enabled at (1135147): [] irqentry_exit+0x3b/0x80
[ 21.626220][ T233] hardirqs last disabled at (1135146): [] handle_softirqs+0x47f/0x610
[ 21.626699][ T233] softirqs last enabled at (1134754): [] handle_softirqs+0x352/0x610
[ 21.627239][ T233] softirqs last disabled at (1134747): [] irq_exit_rcu+0xab/0x100
[ 21.627705][ T233] ---[ end trace 0000000000000000 ]---