[ 18.379791][ T231] ==================================================================
[ 18.380140][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 18.380367][ T231] Read of size 1 at addr ffff88800bb6068c by task packetdrill/231
[ 18.380622][ T231]
[ 18.380711][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.380717][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.380719][ T231] Call Trace:
[ 18.380721][ T231]
[ 18.380723][ T231] dump_stack_lvl+0x82/0xc0
[ 18.380729][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 18.380738][ T231] ? kobject_put+0xbb/0xd0
[ 18.380742][ T231] print_report+0xb4/0x270
[ 18.380745][ T231] ? kobject_put+0xbb/0xd0
[ 18.380748][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 18.380752][ T231] ? kobject_put+0xbb/0xd0
[ 18.380755][ T231] kasan_report+0xca/0x100
[ 18.380759][ T231] ? kobject_put+0xbb/0xd0
[ 18.380764][ T231] kobject_put+0xbb/0xd0
[ 18.380768][ T231] netdev_run_todo+0x5f0/0xc60
[ 18.380774][ T231] ? rtnl_is_locked+0x15/0x20
[ 18.380778][ T231] ? netif_state_change+0x228/0x2c0
[ 18.380781][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.380784][ T231] ? generic_xdp_install+0x410/0x410
[ 18.380788][ T231] ? tun_chr_close+0xae/0x1c0
[ 18.380796][ T231] tun_chr_close+0xc0/0x1c0
[ 18.380800][ T231] __fput+0x35c/0xa70
[ 18.380808][ T231] fput_close_sync+0xdd/0x1b0
[ 18.380811][ T231] ? alloc_file_clone+0xf0/0xf0
[ 18.380816][ T231] __x64_sys_close+0x7d/0xd0
[ 18.380820][ T231] do_syscall_64+0xc1/0xfd0
[ 18.380826][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.380831][ T231] RIP: 0033:0x4901eb
[ 18.380835][ 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
[ 18.380838][ T231] RSP: 002b:00007ffe7816a4a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.380843][ T231] RAX: ffffffffffffffda RBX: 00007ffe7816aa00 RCX: 00000000004901eb
[ 18.380845][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.380847][ T231] RBP: 00007ffe7816a4e0 R08: 0000000000000000 R09: 0000000000000000
[ 18.380849][ T231] R10: 0000000001000000 R11: 0000000000000293 R12: 00007ffe7816a978
[ 18.380851][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.380857][ T231]
[ 18.380858][ T231]
[ 18.387843][ T231] The buggy address belongs to the physical page:
[ 18.388055][ T231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888000000000 pfn:0xbb60
[ 18.388408][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 18.388587][ T231] raw: 0080000000000000 ffffea00002e5908 ffff88803623bc40 0000000000000000
[ 18.388901][ T231] raw: ffff888000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 18.389208][ T231] page dumped because: kasan: bad access detected
[ 18.389441][ T231]
[ 18.389530][ T231] Memory state around the buggy address:
[ 18.389699][ T231] ffff88800bb60580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.389956][ T231] ffff88800bb60600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.390205][ T231] >ffff88800bb60680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.390457][ T231] ^
[ 18.390585][ T231] ffff88800bb60700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.390839][ T231] ffff88800bb60780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.391090][ T231] ==================================================================
[ 18.391355][ T231] Disabling lock debugging due to kernel taint
[ 18.391575][ T231] ------------[ cut here ]------------
[ 18.391734][ T231] refcount_t: underflow; use-after-free.
[ 18.391935][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 18.392236][ T231] Modules linked in:
[ 18.392379][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.392767][ T231] Tainted: [B]=BAD_PAGE
[ 18.392901][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.393118][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 18.393338][ 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 9f 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
[ 18.393950][ T231] RSP: 0018:ffffc90000aa7ce8 EFLAGS: 00010282
[ 18.394167][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 18.394418][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 18.394680][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3f3e134
[ 18.394931][ T231] R10: 0000000000000003 R11: ffffc90000aa7880 R12: 0000000000000001
[ 18.395185][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 18.395440][ T231] FS: 000000000e12c3c0(0000) GS:ffff88809541a000(0000) knlGS:0000000000000000
[ 18.395744][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 18.395961][ T231] CR2: 00007f278fcd3000 CR3: 00000000096d3002 CR4: 0000000000772ef0
[ 18.396217][ T231] PKRU: 55555554
[ 18.396344][ T231] Call Trace:
[ 18.396478][ T231]
[ 18.396571][ T231] netdev_run_todo+0x5f0/0xc60
[ 18.396743][ T231] ? rtnl_is_locked+0x15/0x20
[ 18.396912][ T231] ? netif_state_change+0x228/0x2c0
[ 18.397085][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.397298][ T231] ? generic_xdp_install+0x410/0x410
[ 18.397475][ T231] ? tun_chr_close+0xae/0x1c0
[ 18.397648][ T231] tun_chr_close+0xc0/0x1c0
[ 18.397820][ T231] __fput+0x35c/0xa70
[ 18.397954][ T231] fput_close_sync+0xdd/0x1b0
[ 18.398123][ T231] ? alloc_file_clone+0xf0/0xf0
[ 18.398294][ T231] __x64_sys_close+0x7d/0xd0
[ 18.398469][ T231] do_syscall_64+0xc1/0xfd0
[ 18.398638][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.398848][ T231] RIP: 0033:0x4901eb
[ 18.398985][ 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
[ 18.399610][ T231] RSP: 002b:00007ffe7816a4a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.399875][ T231] RAX: ffffffffffffffda RBX: 00007ffe7816aa00 RCX: 00000000004901eb
[ 18.400132][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.400390][ T231] RBP: 00007ffe7816a4e0 R08: 0000000000000000 R09: 0000000000000000
[ 18.400650][ T231] R10: 0000000001000000 R11: 0000000000000293 R12: 00007ffe7816a978
[ 18.400919][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.401188][ T231]
[ 18.401317][ T231] irq event stamp: 2069089
[ 18.401497][ T231] hardirqs last enabled at (2069089): [] irqentry_exit+0x3b/0x80
[ 18.401789][ T231] hardirqs last disabled at (2069088): [] handle_softirqs+0x47f/0x610
[ 18.402088][ T231] softirqs last enabled at (2069008): [] handle_softirqs+0x352/0x610
[ 18.402378][ T231] softirqs last disabled at (2069001): [] irq_exit_rcu+0xab/0x100
[ 18.402677][ T231] ---[ end trace 0000000000000000 ]---