[ 21.470021][ T232] ==================================================================
[ 21.470499][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 21.470843][ T232] Read of size 1 at addr ffff8880089d868c by task packetdrill/232
[ 21.471259][ T232]
[ 21.471401][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.471408][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.471412][ T232] Call Trace:
[ 21.471415][ T232]
[ 21.471418][ T232] dump_stack_lvl+0x82/0xc0
[ 21.471428][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 21.471437][ T232] ? kobject_put+0xbb/0xd0
[ 21.471443][ T232] print_report+0xb4/0x270
[ 21.471449][ T232] ? kobject_put+0xbb/0xd0
[ 21.471453][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 21.471459][ T232] ? kobject_put+0xbb/0xd0
[ 21.471464][ T232] kasan_report+0xca/0x100
[ 21.471471][ T232] ? kobject_put+0xbb/0xd0
[ 21.471480][ T232] kobject_put+0xbb/0xd0
[ 21.471486][ T232] netdev_run_todo+0x5f0/0xc60
[ 21.471492][ T232] ? rtnl_is_locked+0x15/0x20
[ 21.471497][ T232] ? netif_state_change+0x228/0x2c0
[ 21.471502][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.471507][ T232] ? generic_xdp_install+0x410/0x410
[ 21.471515][ T232] ? tun_chr_close+0xae/0x1c0
[ 21.471525][ T232] tun_chr_close+0xc0/0x1c0
[ 21.471530][ T232] __fput+0x35c/0xa70
[ 21.471539][ T232] fput_close_sync+0xdd/0x1b0
[ 21.471544][ T232] ? alloc_file_clone+0xf0/0xf0
[ 21.471553][ T232] __x64_sys_close+0x7d/0xd0
[ 21.471558][ T232] do_syscall_64+0xc1/0xfd0
[ 21.471566][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.471572][ T232] RIP: 0033:0x4901eb
[ 21.471578][ 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
[ 21.471583][ T232] RSP: 002b:00007ffd7b4ba010 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.471590][ T232] RAX: ffffffffffffffda RBX: 00007ffd7b4ba570 RCX: 00000000004901eb
[ 21.471594][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.471597][ T232] RBP: 00007ffd7b4ba050 R08: 0000000000000000 R09: 0000000000000000
[ 21.471600][ T232] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffd7b4ba4e8
[ 21.471603][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.471616][ T232]
[ 21.471618][ T232]
[ 21.482778][ T232] The buggy address belongs to the physical page:
[ 21.483119][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880089db100 pfn:0x89d8
[ 21.483690][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 21.483981][ T232] raw: 0080000000000000 ffffea00002ec908 ffff8880363bbc40 0000000000000000
[ 21.484474][ T232] raw: ffff8880089db100 0000000000000000 00000000ffffffff 0000000000000000
[ 21.484958][ T232] page dumped because: kasan: bad access detected
[ 21.485289][ T232]
[ 21.485427][ T232] Memory state around the buggy address:
[ 21.485698][ T232] ffff8880089d8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.486106][ T232] ffff8880089d8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.486495][ T232] >ffff8880089d8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.486884][ T232] ^
[ 21.487087][ T232] ffff8880089d8700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.487471][ T232] ffff8880089d8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.487870][ T232] ==================================================================
[ 21.488513][ T232] Disabling lock debugging due to kernel taint
[ 21.488855][ T232] ------------[ cut here ]------------
[ 21.489095][ T232] refcount_t: underflow; use-after-free.
[ 21.489381][ T232] WARNING: CPU: 3 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.489869][ T232] Modules linked in:
[ 21.490086][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.490708][ T232] Tainted: [B]=BAD_PAGE
[ 21.490920][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.491248][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.491598][ 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 e5 a0 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
[ 21.492550][ T232] RSP: 0018:ffffc90000b07ce8 EFLAGS: 00010282
[ 21.492905][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.493321][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.493759][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff42fe134
[ 21.494164][ T232] R10: 0000000000000003 R11: ffffc90000b07880 R12: 0000000000000001
[ 21.494590][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.495012][ T232] FS: 000000004032b3c0(0000) GS:ffff88809379a000(0000) knlGS:0000000000000000
[ 21.495477][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.495818][ T232] CR2: 00007f92579d5000 CR3: 000000000cbed005 CR4: 0000000000772ef0
[ 21.496213][ T232] PKRU: 55555554
[ 21.496409][ T232] Call Trace:
[ 21.496599][ T232]
[ 21.496745][ T232] netdev_run_todo+0x5f0/0xc60
[ 21.497028][ T232] ? rtnl_is_locked+0x15/0x20
[ 21.497306][ T232] ? netif_state_change+0x228/0x2c0
[ 21.497572][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.497944][ T232] ? generic_xdp_install+0x410/0x410
[ 21.498223][ T232] ? tun_chr_close+0xae/0x1c0
[ 21.498521][ T232] tun_chr_close+0xc0/0x1c0
[ 21.498804][ T232] __fput+0x35c/0xa70
[ 21.499026][ T232] fput_close_sync+0xdd/0x1b0
[ 21.499299][ T232] ? alloc_file_clone+0xf0/0xf0
[ 21.499595][ T232] __x64_sys_close+0x7d/0xd0
[ 21.499901][ T232] do_syscall_64+0xc1/0xfd0
[ 21.500167][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.500520][ T232] RIP: 0033:0x4901eb
[ 21.500747][ 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
[ 21.501755][ T232] RSP: 002b:00007ffd7b4ba010 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.502167][ T232] RAX: ffffffffffffffda RBX: 00007ffd7b4ba570 RCX: 00000000004901eb
[ 21.502613][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.503036][ T232] RBP: 00007ffd7b4ba050 R08: 0000000000000000 R09: 0000000000000000
[ 21.503452][ T232] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffd7b4ba4e8
[ 21.503881][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.504305][ T232]
[ 21.504514][ T232] irq event stamp: 2083615
[ 21.504808][ T232] hardirqs last enabled at (2083615): [] irqentry_exit+0x3b/0x80
[ 21.505280][ T232] hardirqs last disabled at (2083614): [] handle_softirqs+0x47f/0x610
[ 21.505767][ T232] softirqs last enabled at (2083332): [] handle_softirqs+0x352/0x610
[ 21.506247][ T232] softirqs last disabled at (2083325): [] irq_exit_rcu+0xab/0x100
[ 21.506733][ T232] ---[ end trace 0000000000000000 ]---