[ 17.032746][ T231] ==================================================================
[ 17.033018][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 17.033232][ T231] Read of size 1 at addr ffff88800bb1068c by task packetdrill/231
[ 17.033464][ T231]
[ 17.033545][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.033550][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.033553][ T231] Call Trace:
[ 17.033554][ T231]
[ 17.033556][ T231] dump_stack_lvl+0x82/0xc0
[ 17.033562][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 17.033568][ T231] ? kobject_put+0xbb/0xd0
[ 17.033573][ T231] print_report+0xb4/0x270
[ 17.033576][ T231] ? kobject_put+0xbb/0xd0
[ 17.033579][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 17.033583][ T231] ? kobject_put+0xbb/0xd0
[ 17.033586][ T231] kasan_report+0xca/0x100
[ 17.033590][ T231] ? kobject_put+0xbb/0xd0
[ 17.033595][ T231] kobject_put+0xbb/0xd0
[ 17.033599][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.033604][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.033607][ T231] ? netif_state_change+0x228/0x2c0
[ 17.033610][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.033613][ T231] ? generic_xdp_install+0x410/0x410
[ 17.033617][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.033623][ T231] tun_chr_close+0xc0/0x1c0
[ 17.033627][ T231] __fput+0x35c/0xa70
[ 17.033634][ T231] fput_close_sync+0xdd/0x1b0
[ 17.033637][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.033642][ T231] __x64_sys_close+0x7d/0xd0
[ 17.033645][ T231] do_syscall_64+0xc1/0xfd0
[ 17.033651][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.033654][ T231] RIP: 0033:0x4901eb
[ 17.033658][ 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
[ 17.033661][ T231] RSP: 002b:00007fffa9e40a10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.033667][ T231] RAX: ffffffffffffffda RBX: 00007fffa9e40f70 RCX: 00000000004901eb
[ 17.033669][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.033671][ T231] RBP: 00007fffa9e40a50 R08: 0000000000000000 R09: 0000000000000000
[ 17.033673][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fffa9e40ee8
[ 17.033675][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.033681][ T231]
[ 17.033682][ T231]
[ 17.040019][ T231] The buggy address belongs to the physical page:
[ 17.040216][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bb111c0 pfn:0xbb10
[ 17.040534][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 17.040696][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.040977][ T231] raw: ffff88800bb111c0 0000000000000000 00000001ffffffff 0000000000000000
[ 17.041255][ T231] page dumped because: kasan: bad access detected
[ 17.041457][ T231]
[ 17.041536][ T231] Memory state around the buggy address:
[ 17.041686][ T231] ffff88800bb10580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.041910][ T231] ffff88800bb10600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.042141][ T231] >ffff88800bb10680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.042370][ T231] ^
[ 17.042523][ T231] ffff88800bb10700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.042748][ T231] ffff88800bb10780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.042973][ T231] ==================================================================
[ 17.043325][ T231] Disabling lock debugging due to kernel taint
[ 17.043521][ T231] ------------[ cut here ]------------
[ 17.043662][ T231] refcount_t: underflow; use-after-free.
[ 17.043843][ T231] WARNING: CPU: 3 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.044125][ T231] Modules linked in:
[ 17.044245][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.044592][ T231] Tainted: [B]=BAD_PAGE
[ 17.044709][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.044908][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.045119][ 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 45 a8 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
[ 17.045668][ T231] RSP: 0018:ffffc90000ab7ce8 EFLAGS: 00010282
[ 17.045872][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.046190][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.046441][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff51be134
[ 17.046667][ T231] R10: 0000000000000003 R11: ffffc90000ab7880 R12: 0000000000000001
[ 17.046979][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.047207][ T231] FS: 000000003b47a3c0(0000) GS:ffff88808659a000(0000) knlGS:0000000000000000
[ 17.047478][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.047761][ T231] CR2: 00007fd922513000 CR3: 0000000009376002 CR4: 0000000000772ef0
[ 17.047984][ T231] PKRU: 55555554
[ 17.048102][ T231] Call Trace:
[ 17.048301][ T231]
[ 17.048380][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.048536][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.048693][ T231] ? netif_state_change+0x228/0x2c0
[ 17.048850][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.049132][ T231] ? generic_xdp_install+0x410/0x410
[ 17.049282][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.049441][ T231] tun_chr_close+0xc0/0x1c0
[ 17.049594][ T231] __fput+0x35c/0xa70
[ 17.049804][ T231] fput_close_sync+0xdd/0x1b0
[ 17.049959][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.050122][ T231] __x64_sys_close+0x7d/0xd0
[ 17.050273][ T231] do_syscall_64+0xc1/0xfd0
[ 17.050513][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.050696][ T231] RIP: 0033:0x4901eb
[ 17.050823][ 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
[ 17.051464][ T231] RSP: 002b:00007fffa9e40a10 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.051689][ T231] RAX: ffffffffffffffda RBX: 00007fffa9e40f70 RCX: 00000000004901eb
[ 17.051921][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.052157][ T231] RBP: 00007fffa9e40a50 R08: 0000000000000000 R09: 0000000000000000
[ 17.052472][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fffa9e40ee8
[ 17.052697][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.052929][ T231]
[ 17.053047][ T231] irq event stamp: 2065447
[ 17.053290][ T231] hardirqs last enabled at (2065447): [] irqentry_exit+0x3b/0x80
[ 17.053561][ T231] hardirqs last disabled at (2065446): [] handle_softirqs+0x47f/0x610
[ 17.053913][ T231] softirqs last enabled at (2065224): [] handle_softirqs+0x352/0x610
[ 17.054184][ T231] softirqs last disabled at (2065217): [] irq_exit_rcu+0xab/0x100
[ 17.054444][ T231] ---[ end trace 0000000000000000 ]---