[ 19.492321][ T230] ==================================================================
[ 19.492639][ T230] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 19.492859][ T230] Read of size 1 at addr ffff8880099a468c by task packetdrill/230
[ 19.493099][ T230]
[ 19.493198][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.493203][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.493207][ T230] Call Trace:
[ 19.493209][ T230]
[ 19.493211][ T230] dump_stack_lvl+0x82/0xc0
[ 19.493217][ T230] print_address_description.constprop.0+0x2c/0x3a0
[ 19.493225][ T230] ? kobject_put+0xbb/0xd0
[ 19.493228][ T230] print_report+0xb4/0x270
[ 19.493232][ T230] ? kobject_put+0xbb/0xd0
[ 19.493235][ T230] ? kasan_addr_to_slab+0x21/0x70
[ 19.493238][ T230] ? kobject_put+0xbb/0xd0
[ 19.493241][ T230] kasan_report+0xca/0x100
[ 19.493245][ T230] ? kobject_put+0xbb/0xd0
[ 19.493251][ T230] kobject_put+0xbb/0xd0
[ 19.493254][ T230] netdev_run_todo+0x5f0/0xc60
[ 19.493259][ T230] ? rtnl_is_locked+0x15/0x20
[ 19.493262][ T230] ? netif_state_change+0x228/0x2c0
[ 19.493265][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.493268][ T230] ? generic_xdp_install+0x410/0x410
[ 19.493272][ T230] ? tun_chr_close+0xae/0x1c0
[ 19.493278][ T230] tun_chr_close+0xc0/0x1c0
[ 19.493282][ T230] __fput+0x35c/0xa70
[ 19.493289][ T230] fput_close_sync+0xdd/0x1b0
[ 19.493292][ T230] ? alloc_file_clone+0xf0/0xf0
[ 19.493297][ T230] __x64_sys_close+0x7d/0xd0
[ 19.493301][ T230] do_syscall_64+0xc1/0xfd0
[ 19.493306][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.493310][ T230] RIP: 0033:0x4901eb
[ 19.493314][ T230] 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
[ 19.493317][ T230] RSP: 002b:00007fffa0e47450 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.493321][ T230] RAX: ffffffffffffffda RBX: 00007fffa0e479b0 RCX: 00000000004901eb
[ 19.493324][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.493325][ T230] RBP: 00007fffa0e47490 R08: 0000000000000000 R09: 0000000000000000
[ 19.493327][ T230] R10: 00000000167e72e0 R11: 0000000000000293 R12: 00007fffa0e47928
[ 19.493329][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.493335][ T230]
[ 19.493336][ T230]
[ 19.500120][ T230] The buggy address belongs to the physical page:
[ 19.500325][ T230] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880099a71c0 pfn:0x99a4
[ 19.500671][ T230] flags: 0x80000000000000(node=0|zone=1)
[ 19.500854][ T230] raw: 0080000000000000 ffffea00002af008 ffff8880363bbc40 0000000000000000
[ 19.501160][ T230] raw: ffff8880099a71c0 0000000000000000 00000000ffffffff 0000000000000000
[ 19.501453][ T230] page dumped because: kasan: bad access detected
[ 19.501662][ T230]
[ 19.501754][ T230] Memory state around the buggy address:
[ 19.501913][ T230] ffff8880099a4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.502156][ T230] ffff8880099a4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.502390][ T230] >ffff8880099a4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.502639][ T230] ^
[ 19.502771][ T230] ffff8880099a4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.503005][ T230] ffff8880099a4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.503238][ T230] ==================================================================
[ 19.503486][ T230] Disabling lock debugging due to kernel taint
[ 19.503700][ T230] ------------[ cut here ]------------
[ 19.503846][ T230] refcount_t: underflow; use-after-free.
[ 19.504023][ T230] WARNING: CPU: 3 PID: 230 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.504357][ T230] Modules linked in:
[ 19.504485][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.504863][ T230] Tainted: [B]=BAD_PAGE
[ 19.504982][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.505192][ T230] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.505407][ T230] 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 a5 87 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
[ 19.505976][ T230] RSP: 0018:ffffc90000b87ce8 EFLAGS: 00010282
[ 19.506212][ T230] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.506460][ T230] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.506721][ T230] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff107e134
[ 19.506956][ T230] R10: 0000000000000003 R11: ffffc90000b87880 R12: 0000000000000001
[ 19.507204][ T230] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.507468][ T230] FS: 00000000167e03c0(0000) GS:ffff8880acb9a000(0000) knlGS:0000000000000000
[ 19.507774][ T230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.507976][ T230] CR2: 0000000000000000 CR3: 00000000053eb005 CR4: 0000000000772ef0
[ 19.508241][ T230] PKRU: 55555554
[ 19.508364][ T230] Call Trace:
[ 19.508486][ T230]
[ 19.508578][ T230] netdev_run_todo+0x5f0/0xc60
[ 19.508773][ T230] ? rtnl_is_locked+0x15/0x20
[ 19.508934][ T230] ? netif_state_change+0x228/0x2c0
[ 19.509088][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.509317][ T230] ? generic_xdp_install+0x410/0x410
[ 19.509473][ T230] ? tun_chr_close+0xae/0x1c0
[ 19.509651][ T230] tun_chr_close+0xc0/0x1c0
[ 19.509819][ T230] __fput+0x35c/0xa70
[ 19.509941][ T230] fput_close_sync+0xdd/0x1b0
[ 19.510109][ T230] ? alloc_file_clone+0xf0/0xf0
[ 19.510279][ T230] __x64_sys_close+0x7d/0xd0
[ 19.510433][ T230] do_syscall_64+0xc1/0xfd0
[ 19.510609][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.510815][ T230] RIP: 0033:0x4901eb
[ 19.510944][ T230] 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
[ 19.511522][ T230] RSP: 002b:00007fffa0e47450 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.511782][ T230] RAX: ffffffffffffffda RBX: 00007fffa0e479b0 RCX: 00000000004901eb
[ 19.512033][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.512296][ T230] RBP: 00007fffa0e47490 R08: 0000000000000000 R09: 0000000000000000
[ 19.512536][ T230] R10: 00000000167e72e0 R11: 0000000000000293 R12: 00007fffa0e47928
[ 19.512779][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.513022][ T230]
[ 19.513154][ T230] irq event stamp: 1898605
[ 19.513315][ T230] hardirqs last enabled at (1898605): [] irqentry_exit+0x3b/0x80
[ 19.513593][ T230] hardirqs last disabled at (1898604): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 19.513916][ T230] softirqs last enabled at (1898530): [] handle_softirqs+0x352/0x610
[ 19.514223][ T230] softirqs last disabled at (1898525): [] irq_exit_rcu+0xab/0x100
[ 19.514492][ T230] ---[ end trace 0000000000000000 ]---