[ 16.028234][ T232] ==================================================================
[ 16.028634][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.028875][ T232] Read of size 1 at addr ffff88800a48068c by task packetdrill/232
[ 16.029163][ T232]
[ 16.029275][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.029282][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.029288][ T232] Call Trace:
[ 16.029293][ T232]
[ 16.029297][ T232] dump_stack_lvl+0x82/0xc0
[ 16.029305][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 16.029324][ T232] ? kobject_put+0xbb/0xd0
[ 16.029328][ T232] print_report+0xb4/0x270
[ 16.029331][ T232] ? kobject_put+0xbb/0xd0
[ 16.029334][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 16.029338][ T232] ? kobject_put+0xbb/0xd0
[ 16.029341][ T232] kasan_report+0xca/0x100
[ 16.029345][ T232] ? kobject_put+0xbb/0xd0
[ 16.029350][ T232] kobject_put+0xbb/0xd0
[ 16.029354][ T232] netdev_run_todo+0x5f0/0xc60
[ 16.029361][ T232] ? rtnl_is_locked+0x15/0x20
[ 16.029365][ T232] ? netif_state_change+0x228/0x2c0
[ 16.029368][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.029371][ T232] ? generic_xdp_install+0x410/0x410
[ 16.029377][ T232] ? tun_chr_close+0xae/0x1c0
[ 16.029391][ T232] tun_chr_close+0xc0/0x1c0
[ 16.029395][ T232] __fput+0x35c/0xa70
[ 16.029407][ T232] fput_close_sync+0xdd/0x1b0
[ 16.029410][ T232] ? alloc_file_clone+0xf0/0xf0
[ 16.029414][ T232] __x64_sys_close+0x7d/0xd0
[ 16.029418][ T232] do_syscall_64+0xc1/0xfd0
[ 16.029426][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.029433][ T232] RIP: 0033:0x4901eb
[ 16.029441][ 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
[ 16.029445][ T232] RSP: 002b:00007ffdb153faf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.029453][ T232] RAX: ffffffffffffffda RBX: 00007ffdb1540050 RCX: 00000000004901eb
[ 16.029455][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.029457][ T232] RBP: 00007ffdb153fb30 R08: 0000000000000000 R09: 0000000000000000
[ 16.029459][ T232] R10: 000000002c6c0f50 R11: 0000000000000293 R12: 00007ffdb153ffc8
[ 16.029461][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.029467][ T232]
[ 16.029468][ T232]
[ 16.036397][ T232] The buggy address belongs to the physical page:
[ 16.036629][ T232] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800a482680 pfn:0xa480
[ 16.036974][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 16.037170][ T232] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.037502][ T232] raw: ffff88800a482680 0000000000000000 00000001ffffffff 0000000000000000
[ 16.037803][ T232] page dumped because: kasan: bad access detected
[ 16.038021][ T232]
[ 16.038118][ T232] Memory state around the buggy address:
[ 16.038318][ T232] ffff88800a480580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.038572][ T232] ffff88800a480600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.038802][ T232] >ffff88800a480680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.039068][ T232] ^
[ 16.039212][ T232] ffff88800a480700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.039465][ T232] ffff88800a480780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.039705][ T232] ==================================================================
[ 16.039978][ T232] Disabling lock debugging due to kernel taint
[ 16.040206][ T232] ------------[ cut here ]------------
[ 16.040373][ T232] refcount_t: underflow; use-after-free.
[ 16.040639][ T232] WARNING: CPU: 3 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.040948][ T232] Modules linked in:
[ 16.041084][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.041454][ T232] Tainted: [B]=BAD_PAGE
[ 16.041606][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.041813][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.042023][ 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 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
[ 16.042604][ T232] RSP: 0018:ffffc90000717ce8 EFLAGS: 00010282
[ 16.042805][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.043046][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.043325][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff423e134
[ 16.043590][ T232] R10: 0000000000000003 R11: ffffc90000717880 R12: 0000000000000001
[ 16.043854][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.044096][ T232] FS: 000000002c6b93c0(0000) GS:ffff88808e19a000(0000) knlGS:0000000000000000
[ 16.044391][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.044614][ T232] CR2: 00007f45b3c09a20 CR3: 00000000059a6004 CR4: 0000000000772ef0
[ 16.044874][ T232] PKRU: 55555554
[ 16.045020][ T232] Call Trace:
[ 16.045156][ T232]
[ 16.045271][ T232] netdev_run_todo+0x5f0/0xc60
[ 16.045450][ T232] ? rtnl_is_locked+0x15/0x20
[ 16.045627][ T232] ? netif_state_change+0x228/0x2c0
[ 16.045788][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.045988][ T232] ? generic_xdp_install+0x410/0x410
[ 16.046160][ T232] ? tun_chr_close+0xae/0x1c0
[ 16.046321][ T232] tun_chr_close+0xc0/0x1c0
[ 16.046478][ T232] __fput+0x35c/0xa70
[ 16.046618][ T232] fput_close_sync+0xdd/0x1b0
[ 16.046775][ T232] ? alloc_file_clone+0xf0/0xf0
[ 16.046944][ T232] __x64_sys_close+0x7d/0xd0
[ 16.047103][ T232] do_syscall_64+0xc1/0xfd0
[ 16.047280][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.047494][ T232] RIP: 0033:0x4901eb
[ 16.047658][ 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
[ 16.048274][ T232] RSP: 002b:00007ffdb153faf0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.048522][ T232] RAX: ffffffffffffffda RBX: 00007ffdb1540050 RCX: 00000000004901eb
[ 16.048778][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.049053][ T232] RBP: 00007ffdb153fb30 R08: 0000000000000000 R09: 0000000000000000
[ 16.049294][ T232] R10: 000000002c6c0f50 R11: 0000000000000293 R12: 00007ffdb153ffc8
[ 16.049538][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.049780][ T232]
[ 16.049909][ T232] irq event stamp: 2017145
[ 16.050071][ T232] hardirqs last enabled at (2017145): [] irqentry_exit+0x3b/0x80
[ 16.050366][ T232] hardirqs last disabled at (2017144): [] handle_softirqs+0x47f/0x610
[ 16.050660][ T232] softirqs last enabled at (2016958): [] __tun_set_ebpf+0xc6/0x180
[ 16.050944][ T232] softirqs last disabled at (2016956): [] __tun_set_ebpf+0x91/0x180
[ 16.051225][ T232] ---[ end trace 0000000000000000 ]---