[ 22.007499][ T230] ==================================================================
[ 22.007979][ T230] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 22.008295][ T230] Read of size 1 at addr ffff88800aa8868c by task packetdrill/230
[ 22.008615][ T230]
[ 22.008707][ T230] CPU: 1 UID: 0 PID: 230 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.008712][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.008715][ T230] Call Trace:
[ 22.008718][ T230]
[ 22.008720][ T230] dump_stack_lvl+0x82/0xc0
[ 22.008730][ T230] print_address_description.constprop.0+0x2c/0x3a0
[ 22.008741][ T230] ? kobject_put+0xbb/0xd0
[ 22.008745][ T230] print_report+0xb4/0x270
[ 22.008749][ T230] ? kobject_put+0xbb/0xd0
[ 22.008752][ T230] ? kasan_addr_to_slab+0x21/0x70
[ 22.008755][ T230] ? kobject_put+0xbb/0xd0
[ 22.008758][ T230] kasan_report+0xca/0x100
[ 22.008762][ T230] ? kobject_put+0xbb/0xd0
[ 22.008768][ T230] kobject_put+0xbb/0xd0
[ 22.008771][ T230] netdev_run_todo+0x5f0/0xc60
[ 22.008779][ T230] ? rtnl_is_locked+0x15/0x20
[ 22.008784][ T230] ? netif_state_change+0x228/0x2c0
[ 22.008790][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.008795][ T230] ? generic_xdp_install+0x410/0x410
[ 22.008802][ T230] ? tun_chr_close+0xae/0x1c0
[ 22.008817][ T230] tun_chr_close+0xc0/0x1c0
[ 22.008823][ T230] __fput+0x35c/0xa70
[ 22.008835][ T230] fput_close_sync+0xdd/0x1b0
[ 22.008840][ T230] ? alloc_file_clone+0xf0/0xf0
[ 22.008849][ T230] __x64_sys_close+0x7d/0xd0
[ 22.008855][ T230] do_syscall_64+0xc1/0xfd0
[ 22.008867][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.008875][ T230] RIP: 0033:0x4901eb
[ 22.008885][ 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
[ 22.008889][ T230] RSP: 002b:00007ffea75ba270 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.008895][ T230] RAX: ffffffffffffffda RBX: 00007ffea75ba7d0 RCX: 00000000004901eb
[ 22.008898][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.008899][ T230] RBP: 00007ffea75ba2b0 R08: 0000000000000000 R09: 0000000000000000
[ 22.008901][ T230] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffea75ba748
[ 22.008903][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.008909][ T230]
[ 22.008911][ T230]
[ 22.016370][ T230] The buggy address belongs to the physical page:
[ 22.016570][ T230] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800aa8e940 pfn:0xaa88
[ 22.016985][ T230] flags: 0x80000000000000(node=0|zone=1)
[ 22.017201][ T230] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 22.017546][ T230] raw: ffff88800aa8e940 0000000000000000 00000001ffffffff 0000000000000000
[ 22.017871][ T230] page dumped because: kasan: bad access detected
[ 22.018116][ T230]
[ 22.018202][ T230] Memory state around the buggy address:
[ 22.018363][ T230] ffff88800aa88580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.018603][ T230] ffff88800aa88600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.018876][ T230] >ffff88800aa88680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.019214][ T230] ^
[ 22.019376][ T230] ffff88800aa88700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.019633][ T230] ffff88800aa88780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.019891][ T230] ==================================================================
[ 22.020302][ T230] Disabling lock debugging due to kernel taint
[ 22.020530][ T230] ------------[ cut here ]------------
[ 22.020692][ T230] refcount_t: underflow; use-after-free.
[ 22.020887][ T230] WARNING: CPU: 1 PID: 230 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 22.021226][ T230] Modules linked in:
[ 22.021400][ T230] CPU: 1 UID: 0 PID: 230 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.021790][ T230] Tainted: [B]=BAD_PAGE
[ 22.021922][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.022160][ T230] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 22.022440][ 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 45 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
[ 22.023099][ T230] RSP: 0018:ffffc90000a67ce8 EFLAGS: 00010282
[ 22.023422][ T230] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 22.023687][ T230] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 22.023944][ T230] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0fbe134
[ 22.024316][ T230] R10: 0000000000000003 R11: ffffc90000a67880 R12: 0000000000000001
[ 22.024650][ T230] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 22.024932][ T230] FS: 0000000029c593c0(0000) GS:ffff8880ad09a000(0000) knlGS:0000000000000000
[ 22.025257][ T230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.025509][ T230] CR2: 00007ff12e2a6000 CR3: 0000000004e61004 CR4: 0000000000772ef0
[ 22.025777][ T230] PKRU: 55555554
[ 22.025928][ T230] Call Trace:
[ 22.026066][ T230]
[ 22.026163][ T230] netdev_run_todo+0x5f0/0xc60
[ 22.026440][ T230] ? rtnl_is_locked+0x15/0x20
[ 22.026610][ T230] ? netif_state_change+0x228/0x2c0
[ 22.026771][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.026995][ T230] ? generic_xdp_install+0x410/0x410
[ 22.027187][ T230] ? tun_chr_close+0xae/0x1c0
[ 22.027370][ T230] tun_chr_close+0xc0/0x1c0
[ 22.027585][ T230] __fput+0x35c/0xa70
[ 22.027769][ T230] fput_close_sync+0xdd/0x1b0
[ 22.027949][ T230] ? alloc_file_clone+0xf0/0xf0
[ 22.028158][ T230] __x64_sys_close+0x7d/0xd0
[ 22.028331][ T230] do_syscall_64+0xc1/0xfd0
[ 22.028522][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.028746][ T230] RIP: 0033:0x4901eb
[ 22.028914][ 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
[ 22.029513][ T230] RSP: 002b:00007ffea75ba270 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.029790][ T230] RAX: ffffffffffffffda RBX: 00007ffea75ba7d0 RCX: 00000000004901eb
[ 22.030066][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.030352][ T230] RBP: 00007ffea75ba2b0 R08: 0000000000000000 R09: 0000000000000000
[ 22.030619][ T230] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffea75ba748
[ 22.030900][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.031192][ T230]
[ 22.031337][ T230] irq event stamp: 1252415
[ 22.031525][ T230] hardirqs last enabled at (1252415): [] irqentry_exit+0x3b/0x80
[ 22.031890][ T230] hardirqs last disabled at (1252414): [] handle_softirqs+0x47f/0x610
[ 22.032290][ T230] softirqs last enabled at (1252122): [] handle_softirqs+0x352/0x610
[ 22.032587][ T230] softirqs last disabled at (1252115): [] irq_exit_rcu+0xab/0x100
[ 22.032891][ T230] ---[ end trace 0000000000000000 ]---