[ 16.818669][ T231] ==================================================================
[ 16.819025][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 16.819248][ T231] Read of size 1 at addr ffff888004c5c68c by task packetdrill/231
[ 16.819518][ T231]
[ 16.819608][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.819613][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.819615][ T231] Call Trace:
[ 16.819618][ T231]
[ 16.819619][ T231] dump_stack_lvl+0x82/0xc0
[ 16.819625][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.819632][ T231] ? kobject_put+0xbb/0xd0
[ 16.819636][ T231] print_report+0xb4/0x270
[ 16.819639][ T231] ? kobject_put+0xbb/0xd0
[ 16.819642][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.819646][ T231] ? kobject_put+0xbb/0xd0
[ 16.819649][ T231] kasan_report+0xca/0x100
[ 16.819653][ T231] ? kobject_put+0xbb/0xd0
[ 16.819658][ T231] kobject_put+0xbb/0xd0
[ 16.819661][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.819666][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.819669][ T231] ? netif_state_change+0x228/0x2c0
[ 16.819673][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.819675][ T231] ? generic_xdp_install+0x410/0x410
[ 16.819680][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.819687][ T231] tun_chr_close+0xc0/0x1c0
[ 16.819691][ T231] __fput+0x35c/0xa70
[ 16.819698][ T231] fput_close_sync+0xdd/0x1b0
[ 16.819701][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.819706][ T231] __x64_sys_close+0x7d/0xd0
[ 16.819709][ T231] do_syscall_64+0xc1/0xfd0
[ 16.819714][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.819719][ T231] RIP: 0033:0x4901eb
[ 16.819723][ 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
[ 16.819726][ T231] RSP: 002b:00007ffd9cc61340 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.819730][ T231] RAX: ffffffffffffffda RBX: 00007ffd9cc618a0 RCX: 00000000004901eb
[ 16.819732][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.819734][ T231] RBP: 00007ffd9cc61380 R08: 0000000000000000 R09: 0000000000000000
[ 16.819736][ T231] R10: 00000000294e6390 R11: 0000000000000293 R12: 00007ffd9cc61818
[ 16.819738][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.819744][ T231]
[ 16.819745][ T231]
[ 16.827052][ T231] The buggy address belongs to the physical page:
[ 16.827278][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4c5c
[ 16.827596][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.827777][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.828115][ T231] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
[ 16.828426][ T231] page dumped because: kasan: bad access detected
[ 16.828646][ T231]
[ 16.828732][ T231] Memory state around the buggy address:
[ 16.828918][ T231] ffff888004c5c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.829187][ T231] ffff888004c5c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.829448][ T231] >ffff888004c5c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.829699][ T231] ^
[ 16.829917][ T231] ffff888004c5c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.830178][ T231] ffff888004c5c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.830438][ T231] ==================================================================
[ 16.830733][ T231] Disabling lock debugging due to kernel taint
[ 16.830962][ T231] ------------[ cut here ]------------
[ 16.831213][ T231] refcount_t: underflow; use-after-free.
[ 16.831409][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.831713][ T231] Modules linked in:
[ 16.831857][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.832276][ T231] Tainted: [B]=BAD_PAGE
[ 16.832412][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.832628][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.832863][ 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 9b 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
[ 16.833517][ T231] RSP: 0018:ffffc90000ab7ce8 EFLAGS: 00010282
[ 16.833736][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.834031][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.834303][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff377e134
[ 16.834565][ T231] R10: 0000000000000003 R11: ffffc90000ab7880 R12: 0000000000000001
[ 16.834820][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.835106][ T231] FS: 00000000294de3c0(0000) GS:ffff88809361a000(0000) knlGS:0000000000000000
[ 16.835415][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.835644][ T231] CR2: 0000000000000000 CR3: 000000000c971002 CR4: 0000000000772ef0
[ 16.835921][ T231] PKRU: 55555554
[ 16.836060][ T231] Call Trace:
[ 16.836203][ T231]
[ 16.836294][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.836475][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.836644][ T231] ? netif_state_change+0x228/0x2c0
[ 16.836809][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.837042][ T231] ? generic_xdp_install+0x410/0x410
[ 16.837229][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.837401][ T231] tun_chr_close+0xc0/0x1c0
[ 16.837577][ T231] __fput+0x35c/0xa70
[ 16.837709][ T231] fput_close_sync+0xdd/0x1b0
[ 16.837890][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.838069][ T231] __x64_sys_close+0x7d/0xd0
[ 16.838257][ T231] do_syscall_64+0xc1/0xfd0
[ 16.838429][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.838656][ T231] RIP: 0033:0x4901eb
[ 16.838792][ 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
[ 16.839472][ T231] RSP: 002b:00007ffd9cc61340 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.839729][ T231] RAX: ffffffffffffffda RBX: 00007ffd9cc618a0 RCX: 00000000004901eb
[ 16.840011][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.840279][ T231] RBP: 00007ffd9cc61380 R08: 0000000000000000 R09: 0000000000000000
[ 16.840540][ T231] R10: 00000000294e6390 R11: 0000000000000293 R12: 00007ffd9cc61818
[ 16.840791][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.841069][ T231]
[ 16.841214][ T231] irq event stamp: 1855373
[ 16.841384][ T231] hardirqs last enabled at (1855373): [] irqentry_exit+0x3b/0x80
[ 16.841683][ T231] hardirqs last disabled at (1855372): [] handle_softirqs+0x47f/0x610
[ 16.842012][ T231] softirqs last enabled at (1855182): [] __tun_set_ebpf+0xc6/0x180
[ 16.842327][ T231] softirqs last disabled at (1855180): [] __tun_set_ebpf+0x91/0x180
[ 16.842627][ T231] ---[ end trace 0000000000000000 ]---