[ 17.624999][ T232] ==================================================================
[ 17.625471][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.625808][ T232] Read of size 1 at addr ffff88800873068c by task packetdrill/232
[ 17.626196][ T232]
[ 17.626340][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.626349][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.626352][ T232] Call Trace:
[ 17.626355][ T232]
[ 17.626358][ T232] dump_stack_lvl+0x82/0xc0
[ 17.626368][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 17.626379][ T232] ? kobject_put+0xbb/0xd0
[ 17.626386][ T232] print_report+0xb4/0x270
[ 17.626392][ T232] ? kobject_put+0xbb/0xd0
[ 17.626397][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 17.626402][ T232] ? kobject_put+0xbb/0xd0
[ 17.626407][ T232] kasan_report+0xca/0x100
[ 17.626414][ T232] ? kobject_put+0xbb/0xd0
[ 17.626423][ T232] kobject_put+0xbb/0xd0
[ 17.626429][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.626438][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.626444][ T232] ? netif_state_change+0x228/0x2c0
[ 17.626450][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.626455][ T232] ? generic_xdp_install+0x410/0x410
[ 17.626463][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.626476][ T232] tun_chr_close+0xc0/0x1c0
[ 17.626482][ T232] __fput+0x35c/0xa70
[ 17.626496][ T232] fput_close_sync+0xdd/0x1b0
[ 17.626502][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.626511][ T232] __x64_sys_close+0x7d/0xd0
[ 17.626517][ T232] do_syscall_64+0xc1/0xfd0
[ 17.626526][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.626532][ T232] RIP: 0033:0x4901eb
[ 17.626538][ T232] 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
[ 17.626543][ T232] RSP: 002b:00007ffd9876e9b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.626549][ T232] RAX: ffffffffffffffda RBX: 00007ffd9876ef10 RCX: 00000000004901eb
[ 17.626553][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.626556][ T232] RBP: 00007ffd9876e9f0 R08: 0000000000000000 R09: 0000000000000000
[ 17.626559][ T232] R10: 000000002e0f6d10 R11: 0000000000000293 R12: 00007ffd9876ee88
[ 17.626562][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.626575][ T232]
[ 17.626577][ T232]
[ 17.637433][ T232] The buggy address belongs to the physical page:
[ 17.637774][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888008733a00 pfn:0x8730
[ 17.638331][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 17.638610][ T232] raw: 0080000000000000 ffffea0000271008 ffff8880363bbc40 0000000000000000
[ 17.639076][ T232] raw: ffff888008733a00 0000000000000000 00000000ffffffff 0000000000000000
[ 17.639566][ T232] page dumped because: kasan: bad access detected
[ 17.639932][ T232]
[ 17.640063][ T232] Memory state around the buggy address:
[ 17.640326][ T232] ffff888008730580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.640720][ T232] ffff888008730600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.641101][ T232] >ffff888008730680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.641489][ T232] ^
[ 17.641694][ T232] ffff888008730700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.642079][ T232] ffff888008730780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.642462][ T232] ==================================================================
[ 17.642874][ T232] Disabling lock debugging due to kernel taint
[ 17.643190][ T232] ------------[ cut here ]------------
[ 17.643432][ T232] refcount_t: underflow; use-after-free.
[ 17.643723][ T232] WARNING: CPU: 3 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.644184][ T232] Modules linked in:
[ 17.644389][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.644984][ T232] Tainted: [B]=BAD_PAGE
[ 17.645180][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.645520][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.645834][ T232] 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 85 b5 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
[ 17.646694][ T232] RSP: 0018:ffffc90000b37ce8 EFLAGS: 00010282
[ 17.647004][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.647389][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.647760][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff6c3e134
[ 17.648144][ T232] R10: 0000000000000003 R11: ffffc90000b37880 R12: 0000000000000001
[ 17.648517][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.648892][ T232] FS: 000000002e0e73c0(0000) GS:ffff88807ed9a000(0000) knlGS:0000000000000000
[ 17.649337][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.649659][ T232] CR2: 00007fe1a851b000 CR3: 000000000aa9d003 CR4: 0000000000772ef0
[ 17.650053][ T232] PKRU: 55555554
[ 17.650264][ T232] Call Trace:
[ 17.650450][ T232]
[ 17.650583][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.650859][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.651132][ T232] ? netif_state_change+0x228/0x2c0
[ 17.651367][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.651690][ T232] ? generic_xdp_install+0x410/0x410
[ 17.651946][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.652202][ T232] tun_chr_close+0xc0/0x1c0
[ 17.652449][ T232] __fput+0x35c/0xa70
[ 17.652631][ T232] fput_close_sync+0xdd/0x1b0
[ 17.652869][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.653126][ T232] __x64_sys_close+0x7d/0xd0
[ 17.653384][ T232] do_syscall_64+0xc1/0xfd0
[ 17.653639][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.653951][ T232] RIP: 0033:0x4901eb
[ 17.654151][ T232] 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
[ 17.655056][ T232] RSP: 002b:00007ffd9876e9b0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.655430][ T232] RAX: ffffffffffffffda RBX: 00007ffd9876ef10 RCX: 00000000004901eb
[ 17.655813][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.656197][ T232] RBP: 00007ffd9876e9f0 R08: 0000000000000000 R09: 0000000000000000
[ 17.656589][ T232] R10: 000000002e0f6d10 R11: 0000000000000293 R12: 00007ffd9876ee88
[ 17.656955][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.657347][ T232]
[ 17.657537][ T232] irq event stamp: 1787175
[ 17.657784][ T232] hardirqs last enabled at (1787175): [] irqentry_exit+0x3b/0x80
[ 17.658227][ T232] hardirqs last disabled at (1787174): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 17.658715][ T232] softirqs last enabled at (1787164): [] handle_softirqs+0x352/0x610
[ 17.659146][ T232] softirqs last disabled at (1787159): [] irq_exit_rcu+0xab/0x100
[ 17.659580][ T232] ---[ end trace 0000000000000000 ]---