[ 21.744163][ T233] ==================================================================
[ 21.744582][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 21.744888][ T233] Read of size 1 at addr ffff88800bca068c by task packetdrill/233
[ 21.745165][ T233]
[ 21.745265][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.745271][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.745274][ T233] Call Trace:
[ 21.745276][ T233]
[ 21.745277][ T233] dump_stack_lvl+0x82/0xc0
[ 21.745285][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 21.745296][ T233] ? kobject_put+0xbb/0xd0
[ 21.745301][ T233] print_report+0xb4/0x270
[ 21.745305][ T233] ? kobject_put+0xbb/0xd0
[ 21.745308][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 21.745311][ T233] ? kobject_put+0xbb/0xd0
[ 21.745314][ T233] kasan_report+0xca/0x100
[ 21.745318][ T233] ? kobject_put+0xbb/0xd0
[ 21.745323][ T233] kobject_put+0xbb/0xd0
[ 21.745327][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.745332][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.745335][ T233] ? netif_state_change+0x228/0x2c0
[ 21.745338][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.745341][ T233] ? generic_xdp_install+0x410/0x410
[ 21.745345][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.745352][ T233] tun_chr_close+0xc0/0x1c0
[ 21.745356][ T233] __fput+0x35c/0xa70
[ 21.745363][ T233] fput_close_sync+0xdd/0x1b0
[ 21.745366][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.745370][ T233] __x64_sys_close+0x7d/0xd0
[ 21.745374][ T233] do_syscall_64+0xc1/0xfd0
[ 21.745380][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.745383][ T233] RIP: 0033:0x4901eb
[ 21.745389][ T233] 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
[ 21.745391][ T233] RSP: 002b:00007fffa64438c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.745396][ T233] RAX: ffffffffffffffda RBX: 00007fffa6443e20 RCX: 00000000004901eb
[ 21.745398][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.745400][ T233] RBP: 00007fffa6443900 R08: 0000000000000000 R09: 0000000000000000
[ 21.745401][ T233] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fffa6443d98
[ 21.745403][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.745409][ T233]
[ 21.745411][ T233]
[ 21.753535][ T233] The buggy address belongs to the physical page:
[ 21.753797][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88800bca3700 pfn:0xbca0
[ 21.754197][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 21.754391][ T233] raw: 0080000000000000 ffffea00002efe08 ffff88803623bc40 0000000000000000
[ 21.754801][ T233] raw: ffff88800bca3700 0000000000000000 00000000ffffffff 0000000000000000
[ 21.755184][ T233] page dumped because: kasan: bad access detected
[ 21.755428][ T233]
[ 21.755537][ T233] Memory state around the buggy address:
[ 21.755733][ T233] ffff88800bca0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.756048][ T233] ffff88800bca0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.756314][ T233] >ffff88800bca0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.756569][ T233] ^
[ 21.756711][ T233] ffff88800bca0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.757025][ T233] ffff88800bca0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.757267][ T233] ==================================================================
[ 21.757736][ T233] Disabling lock debugging due to kernel taint
[ 21.758026][ T233] ------------[ cut here ]------------
[ 21.758202][ T233] refcount_t: underflow; use-after-free.
[ 21.758398][ T233] WARNING: CPU: 0 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.758745][ T233] Modules linked in:
[ 21.758888][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.759281][ T233] Tainted: [B]=BAD_PAGE
[ 21.759408][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.759620][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.759922][ T233] 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 a8 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
[ 21.760563][ T233] RSP: 0018:ffffc90000a57ce8 EFLAGS: 00010282
[ 21.760808][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.761078][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.761357][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff517e134
[ 21.761617][ T233] R10: 0000000000000003 R11: ffffc90000a57880 R12: 0000000000000001
[ 21.761912][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.762196][ T233] FS: 0000000002f703c0(0000) GS:ffff88808c21a000(0000) knlGS:0000000000000000
[ 21.762544][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.762811][ T233] CR2: 00007f589c0f8000 CR3: 000000000521c001 CR4: 0000000000772ef0
[ 21.763083][ T233] PKRU: 55555554
[ 21.763223][ T233] Call Trace:
[ 21.763343][ T233]
[ 21.763432][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.763619][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.763850][ T233] ? netif_state_change+0x228/0x2c0
[ 21.764054][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.764278][ T233] ? generic_xdp_install+0x410/0x410
[ 21.764453][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.764633][ T233] tun_chr_close+0xc0/0x1c0
[ 21.764833][ T233] __fput+0x35c/0xa70
[ 21.764968][ T233] fput_close_sync+0xdd/0x1b0
[ 21.765142][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.765318][ T233] __x64_sys_close+0x7d/0xd0
[ 21.765506][ T233] do_syscall_64+0xc1/0xfd0
[ 21.765699][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.765943][ T233] RIP: 0033:0x4901eb
[ 21.766083][ T233] 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
[ 21.766739][ T233] RSP: 002b:00007fffa64438c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.767083][ T233] RAX: ffffffffffffffda RBX: 00007fffa6443e20 RCX: 00000000004901eb
[ 21.767469][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.767916][ T233] RBP: 00007fffa6443900 R08: 0000000000000000 R09: 0000000000000000
[ 21.768284][ T233] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fffa6443d98
[ 21.768662][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.769015][ T233]
[ 21.769188][ T233] irq event stamp: 1640051
[ 21.769411][ T233] hardirqs last enabled at (1640051): [] irqentry_exit+0x3b/0x80
[ 21.769839][ T233] hardirqs last disabled at (1640050): [] handle_softirqs+0x47f/0x610
[ 21.770258][ T233] softirqs last enabled at (1639704): [] handle_softirqs+0x352/0x610
[ 21.770694][ T233] softirqs last disabled at (1639697): [] irq_exit_rcu+0xab/0x100
[ 21.771157][ T233] ---[ end trace 0000000000000000 ]---