[ 16.931990][ T231] ==================================================================
[ 16.932335][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.932599][ T231] Read of size 1 at addr ffff88800a51868c by task packetdrill/231
[ 16.932864][ T231]
[ 16.932956][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.932961][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.932964][ T231] Call Trace:
[ 16.932968][ T231]
[ 16.932970][ T231] dump_stack_lvl+0x82/0xc0
[ 16.932979][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.932991][ T231] ? kobject_put+0xbb/0xd0
[ 16.932995][ T231] print_report+0xb4/0x270
[ 16.932998][ T231] ? kobject_put+0xbb/0xd0
[ 16.933002][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.933005][ T231] ? kobject_put+0xbb/0xd0
[ 16.933008][ T231] kasan_report+0xca/0x100
[ 16.933012][ T231] ? kobject_put+0xbb/0xd0
[ 16.933018][ T231] kobject_put+0xbb/0xd0
[ 16.933021][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.933029][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.933033][ T231] ? netif_state_change+0x228/0x2c0
[ 16.933036][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.933039][ T231] ? generic_xdp_install+0x410/0x410
[ 16.933043][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.933052][ T231] tun_chr_close+0xc0/0x1c0
[ 16.933056][ T231] __fput+0x35c/0xa70
[ 16.933064][ T231] fput_close_sync+0xdd/0x1b0
[ 16.933067][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.933072][ T231] __x64_sys_close+0x7d/0xd0
[ 16.933075][ T231] do_syscall_64+0xc1/0xfd0
[ 16.933082][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.933088][ T231] RIP: 0033:0x4901eb
[ 16.933093][ 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
[ 16.933096][ T231] RSP: 002b:00007fff7a369590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.933102][ T231] RAX: ffffffffffffffda RBX: 00007fff7a369af0 RCX: 00000000004901eb
[ 16.933105][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.933107][ T231] RBP: 00007fff7a3695d0 R08: 0000000000000000 R09: 0000000000000000
[ 16.933108][ T231] R10: 0000000000000004 R11: 0000000000000293 R12: 00007fff7a369a68
[ 16.933110][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.933117][ T231]
[ 16.933118][ T231]
[ 16.940509][ T231] The buggy address belongs to the physical page:
[ 16.940744][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a51c000 pfn:0xa518
[ 16.941105][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.941292][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.941621][ T231] raw: ffff88800a51c000 0000000000000000 00000001ffffffff 0000000000000000
[ 16.941947][ T231] page dumped because: kasan: bad access detected
[ 16.942170][ T231]
[ 16.942258][ T231] Memory state around the buggy address:
[ 16.942442][ T231] ffff88800a518580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.942705][ T231] ffff88800a518600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.942966][ T231] >ffff88800a518680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.943232][ T231] ^
[ 16.943372][ T231] ffff88800a518700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.943627][ T231] ffff88800a518780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.943902][ T231] ==================================================================
[ 16.944207][ T231] Disabling lock debugging due to kernel taint
[ 16.944501][ T231] ------------[ cut here ]------------
[ 16.944668][ T231] refcount_t: underflow; use-after-free.
[ 16.944888][ T231] WARNING: CPU: 3 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.945210][ T231] Modules linked in:
[ 16.945366][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.945775][ T231] Tainted: [B]=BAD_PAGE
[ 16.945924][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.946150][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.946397][ 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 25 8d 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
[ 16.947035][ T231] RSP: 0018:ffffc90000b17ce8 EFLAGS: 00010282
[ 16.947250][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.947524][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.947787][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1b7e134
[ 16.948067][ T231] R10: 0000000000000003 R11: ffffc90000b17880 R12: 0000000000000001
[ 16.948353][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.948616][ T231] FS: 0000000001a7f3c0(0000) GS:ffff8880a739a000(0000) knlGS:0000000000000000
[ 16.948923][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.949150][ T231] CR2: 00007ff5751fb000 CR3: 000000000274a006 CR4: 0000000000772ef0
[ 16.949428][ T231] PKRU: 55555554
[ 16.949568][ T231] Call Trace:
[ 16.949711][ T231]
[ 16.949804][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.950001][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.950193][ T231] ? netif_state_change+0x228/0x2c0
[ 16.950385][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.950601][ T231] ? generic_xdp_install+0x410/0x410
[ 16.950770][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.950949][ T231] tun_chr_close+0xc0/0x1c0
[ 16.951156][ T231] __fput+0x35c/0xa70
[ 16.951309][ T231] fput_close_sync+0xdd/0x1b0
[ 16.951727][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.951900][ T231] __x64_sys_close+0x7d/0xd0
[ 16.952082][ T231] do_syscall_64+0xc1/0xfd0
[ 16.952256][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.952486][ T231] RIP: 0033:0x4901eb
[ 16.952627][ 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
[ 16.953248][ T231] RSP: 002b:00007fff7a369590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.953525][ T231] RAX: ffffffffffffffda RBX: 00007fff7a369af0 RCX: 00000000004901eb
[ 16.953784][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.954063][ T231] RBP: 00007fff7a3695d0 R08: 0000000000000000 R09: 0000000000000000
[ 16.954349][ T231] R10: 0000000000000004 R11: 0000000000000293 R12: 00007fff7a369a68
[ 16.954608][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.954863][ T231]
[ 16.954992][ T231] irq event stamp: 1984869
[ 16.955173][ T231] hardirqs last enabled at (1984869): [] irqentry_exit+0x3b/0x80
[ 16.955491][ T231] hardirqs last disabled at (1984868): [] handle_softirqs+0x47f/0x610
[ 16.955791][ T231] softirqs last enabled at (1984680): [] __tun_set_ebpf+0xc6/0x180
[ 16.956085][ T231] softirqs last disabled at (1984678): [] __tun_set_ebpf+0x91/0x180
[ 16.956399][ T231] ---[ end trace 0000000000000000 ]---