[ 16.290122][ T231] ==================================================================
[ 16.290430][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 16.290652][ T231] Read of size 1 at addr ffff88800b1bc68c by task packetdrill/231
[ 16.290899][ T231]
[ 16.290987][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.290992][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.290996][ T231] Call Trace:
[ 16.290998][ T231]
[ 16.291000][ T231] dump_stack_lvl+0x82/0xc0
[ 16.291006][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.291014][ T231] ? kobject_put+0xbb/0xd0
[ 16.291019][ T231] print_report+0xb4/0x270
[ 16.291022][ T231] ? kobject_put+0xbb/0xd0
[ 16.291025][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.291029][ T231] ? kobject_put+0xbb/0xd0
[ 16.291032][ T231] kasan_report+0xca/0x100
[ 16.291036][ T231] ? kobject_put+0xbb/0xd0
[ 16.291041][ T231] kobject_put+0xbb/0xd0
[ 16.291045][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.291050][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.291054][ T231] ? netif_state_change+0x228/0x2c0
[ 16.291058][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.291063][ T231] ? generic_xdp_install+0x410/0x410
[ 16.291069][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.291080][ T231] tun_chr_close+0xc0/0x1c0
[ 16.291086][ T231] __fput+0x35c/0xa70
[ 16.291098][ T231] fput_close_sync+0xdd/0x1b0
[ 16.291101][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.291106][ T231] __x64_sys_close+0x7d/0xd0
[ 16.291110][ T231] do_syscall_64+0xc1/0xfd0
[ 16.291117][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.291122][ T231] RIP: 0033:0x4901eb
[ 16.291126][ 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
[ 16.291129][ T231] RSP: 002b:00007ffc91e5d3e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.291133][ T231] RAX: ffffffffffffffda RBX: 00007ffc91e5d940 RCX: 00000000004901eb
[ 16.291136][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.291137][ T231] RBP: 00007ffc91e5d420 R08: 0000000000000000 R09: 0000000000000000
[ 16.291139][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffc91e5d8b8
[ 16.291141][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.291148][ T231]
[ 16.291149][ T231]
[ 16.298149][ T231] The buggy address belongs to the physical page:
[ 16.298355][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800b1bf400 pfn:0xb1bc
[ 16.298812][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.299007][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.299427][ T231] raw: ffff88800b1bf400 0000000000000000 00000001ffffffff 0000000000000000
[ 16.299748][ T231] page dumped because: kasan: bad access detected
[ 16.299974][ T231]
[ 16.300060][ T231] Memory state around the buggy address:
[ 16.300343][ T231] ffff88800b1bc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.300614][ T231] ffff88800b1bc600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.300869][ T231] >ffff88800b1bc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.301215][ T231] ^
[ 16.301390][ T231] ffff88800b1bc700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.301649][ T231] ffff88800b1bc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.301970][ T231] ==================================================================
[ 16.302238][ T231] Disabling lock debugging due to kernel taint
[ 16.302523][ T231] ------------[ cut here ]------------
[ 16.302683][ T231] refcount_t: underflow; use-after-free.
[ 16.302891][ T231] WARNING: CPU: 1 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.303435][ T231] Modules linked in:
[ 16.303571][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.303940][ T231] Tainted: [B]=BAD_PAGE
[ 16.304066][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.304282][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.304496][ 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 e5 9e 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
[ 16.305077][ T231] RSP: 0018:ffffc90000a27ce8 EFLAGS: 00010282
[ 16.305381][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.305636][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.305895][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3efe134
[ 16.306249][ T231] R10: 0000000000000003 R11: ffffc90000a27880 R12: 0000000000000001
[ 16.306496][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.306758][ T231] FS: 0000000030f173c0(0000) GS:ffff88809569a000(0000) knlGS:0000000000000000
[ 16.307148][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.307369][ T231] CR2: 00007f0ecf801a20 CR3: 000000000bc39002 CR4: 0000000000772ef0
[ 16.307720][ T231] PKRU: 55555554
[ 16.307851][ T231] Call Trace:
[ 16.307984][ T231]
[ 16.308081][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.308267][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.308546][ T231] ? netif_state_change+0x228/0x2c0
[ 16.308728][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.308943][ T231] ? generic_xdp_install+0x410/0x410
[ 16.309122][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.309393][ T231] tun_chr_close+0xc0/0x1c0
[ 16.309576][ T231] __fput+0x35c/0xa70
[ 16.309707][ T231] fput_close_sync+0xdd/0x1b0
[ 16.309871][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.310124][ T231] __x64_sys_close+0x7d/0xd0
[ 16.310299][ T231] do_syscall_64+0xc1/0xfd0
[ 16.310477][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.310691][ T231] RIP: 0033:0x4901eb
[ 16.310926][ 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
[ 16.311654][ T231] RSP: 002b:00007ffc91e5d3e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.311903][ T231] RAX: ffffffffffffffda RBX: 00007ffc91e5d940 RCX: 00000000004901eb
[ 16.312157][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.312498][ T231] RBP: 00007ffc91e5d420 R08: 0000000000000000 R09: 0000000000000000
[ 16.312754][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffc91e5d8b8
[ 16.312998][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.313339][ T231]
[ 16.313476][ T231] irq event stamp: 2075565
[ 16.313657][ T231] hardirqs last enabled at (2075565): [] irqentry_exit+0x3b/0x80
[ 16.314044][ T231] hardirqs last disabled at (2075564): [] handle_softirqs+0x47f/0x610
[ 16.314350][ T231] softirqs last enabled at (2075374): [] __tun_set_ebpf+0xc6/0x180
[ 16.314636][ T231] softirqs last disabled at (2075372): [] __tun_set_ebpf+0x91/0x180
[ 16.315010][ T231] ---[ end trace 0000000000000000 ]---