[ 16.482961][ T231] ==================================================================
[ 16.483320][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.483530][ T231] Read of size 1 at addr ffff8880099f068c by task packetdrill/231
[ 16.483762][ T231]
[ 16.483850][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.483855][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.483858][ T231] Call Trace:
[ 16.483861][ T231]
[ 16.483863][ T231] dump_stack_lvl+0x82/0xc0
[ 16.483869][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.483877][ T231] ? kobject_put+0xbb/0xd0
[ 16.483881][ T231] print_report+0xb4/0x270
[ 16.483884][ T231] ? kobject_put+0xbb/0xd0
[ 16.483888][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.483891][ T231] ? kobject_put+0xbb/0xd0
[ 16.483894][ T231] kasan_report+0xca/0x100
[ 16.483898][ T231] ? kobject_put+0xbb/0xd0
[ 16.483904][ T231] kobject_put+0xbb/0xd0
[ 16.483907][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.483913][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.483917][ T231] ? netif_state_change+0x228/0x2c0
[ 16.483920][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.483923][ T231] ? generic_xdp_install+0x410/0x410
[ 16.483927][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.483935][ T231] tun_chr_close+0xc0/0x1c0
[ 16.483939][ T231] __fput+0x35c/0xa70
[ 16.483947][ T231] fput_close_sync+0xdd/0x1b0
[ 16.483950][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.483955][ T231] __x64_sys_close+0x7d/0xd0
[ 16.483959][ T231] do_syscall_64+0xc1/0xfd0
[ 16.483965][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.483970][ T231] RIP: 0033:0x4901eb
[ 16.483974][ 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
[ 16.483977][ T231] RSP: 002b:00007ffe86c81420 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.483981][ T231] RAX: ffffffffffffffda RBX: 00007ffe86c81980 RCX: 00000000004901eb
[ 16.483984][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.483986][ T231] RBP: 00007ffe86c81460 R08: 0000000000000000 R09: 0000000000000000
[ 16.483988][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffe86c818f8
[ 16.483990][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.483996][ T231]
[ 16.483997][ T231]
[ 16.490400][ T231] The buggy address belongs to the physical page:
[ 16.490596][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880099f0d00 pfn:0x99f0
[ 16.490935][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.491101][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.491382][ T231] raw: ffff8880099f0d00 0000000000000000 00000001ffffffff 0000000000000000
[ 16.491656][ T231] page dumped because: kasan: bad access detected
[ 16.491849][ T231]
[ 16.491934][ T231] Memory state around the buggy address:
[ 16.492088][ T231] ffff8880099f0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.492315][ T231] ffff8880099f0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.492541][ T231] >ffff8880099f0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.492768][ T231] ^
[ 16.492891][ T231] ffff8880099f0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.493117][ T231] ffff8880099f0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.493343][ T231] ==================================================================
[ 16.493591][ T231] Disabling lock debugging due to kernel taint
[ 16.493785][ T231] ------------[ cut here ]------------
[ 16.493933][ T231] refcount_t: underflow; use-after-free.
[ 16.494120][ T231] WARNING: CPU: 1 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.494393][ T231] Modules linked in:
[ 16.494516][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.494867][ T231] Tainted: [B]=BAD_PAGE
[ 16.494988][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.495186][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.495383][ 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 c5 83 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
[ 16.495923][ T231] RSP: 0018:ffffc90000ad7ce8 EFLAGS: 00010282
[ 16.496125][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.496369][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.496619][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff08be134
[ 16.496870][ T231] R10: 0000000000000003 R11: ffffc90000ad7880 R12: 0000000000000001
[ 16.497128][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.497378][ T231] FS: 00000000192e23c0(0000) GS:ffff8880b089a000(0000) knlGS:0000000000000000
[ 16.497672][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.497883][ T231] CR2: 00007f3d88447000 CR3: 000000000a5e4002 CR4: 0000000000772ef0
[ 16.498143][ T231] PKRU: 55555554
[ 16.498268][ T231] Call Trace:
[ 16.498383][ T231]
[ 16.498465][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.498622][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.498776][ T231] ? netif_state_change+0x228/0x2c0
[ 16.498929][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.499123][ T231] ? generic_xdp_install+0x410/0x410
[ 16.499278][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.499440][ T231] tun_chr_close+0xc0/0x1c0
[ 16.499592][ T231] __fput+0x35c/0xa70
[ 16.499713][ T231] fput_close_sync+0xdd/0x1b0
[ 16.499864][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.500018][ T231] __x64_sys_close+0x7d/0xd0
[ 16.500176][ T231] do_syscall_64+0xc1/0xfd0
[ 16.500332][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.500523][ T231] RIP: 0033:0x4901eb
[ 16.500658][ 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
[ 16.501206][ T231] RSP: 002b:00007ffe86c81420 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.501440][ T231] RAX: ffffffffffffffda RBX: 00007ffe86c81980 RCX: 00000000004901eb
[ 16.501679][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.501911][ T231] RBP: 00007ffe86c81460 R08: 0000000000000000 R09: 0000000000000000
[ 16.502147][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffe86c818f8
[ 16.502376][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.502613][ T231]
[ 16.502729][ T231] irq event stamp: 1867413
[ 16.502881][ T231] hardirqs last enabled at (1867413): [] irqentry_exit+0x3b/0x80
[ 16.503153][ T231] hardirqs last disabled at (1867412): [] handle_softirqs+0x47f/0x610
[ 16.503425][ T231] softirqs last enabled at (1867212): [] __tun_set_ebpf+0xc6/0x180
[ 16.503695][ T231] softirqs last disabled at (1867210): [] __tun_set_ebpf+0x91/0x180
[ 16.503959][ T231] ---[ end trace 0000000000000000 ]---
[ 16.514911][ T231] packetdrill (231) used greatest stack depth: 23952 bytes left