[ 21.587298][ T231] ==================================================================
[ 21.587892][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 21.588236][ T231] Read of size 1 at addr ffff88800bb6c68c by task packetdrill/231
[ 21.588686][ T231]
[ 21.588844][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.588853][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.588856][ T231] Call Trace:
[ 21.588859][ T231]
[ 21.588862][ T231] dump_stack_lvl+0x82/0xc0
[ 21.588872][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 21.588881][ T231] ? kobject_put+0xbb/0xd0
[ 21.588887][ T231] print_report+0xb4/0x270
[ 21.588892][ T231] ? kobject_put+0xbb/0xd0
[ 21.588898][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 21.588904][ T231] ? kobject_put+0xbb/0xd0
[ 21.588909][ T231] kasan_report+0xca/0x100
[ 21.588916][ T231] ? kobject_put+0xbb/0xd0
[ 21.588925][ T231] kobject_put+0xbb/0xd0
[ 21.588931][ T231] netdev_run_todo+0x5f0/0xc60
[ 21.588938][ T231] ? rtnl_is_locked+0x15/0x20
[ 21.588944][ T231] ? netif_state_change+0x228/0x2c0
[ 21.588949][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.588954][ T231] ? generic_xdp_install+0x410/0x410
[ 21.588961][ T231] ? tun_chr_close+0xae/0x1c0
[ 21.588972][ T231] tun_chr_close+0xc0/0x1c0
[ 21.588979][ T231] __fput+0x35c/0xa70
[ 21.588992][ T231] fput_close_sync+0xdd/0x1b0
[ 21.588997][ T231] ? alloc_file_clone+0xf0/0xf0
[ 21.589007][ T231] __x64_sys_close+0x7d/0xd0
[ 21.589013][ T231] do_syscall_64+0xc1/0xfd0
[ 21.589021][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.589026][ T231] RIP: 0033:0x4901eb
[ 21.589032][ 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
[ 21.589037][ T231] RSP: 002b:00007fff5684e670 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.589044][ T231] RAX: ffffffffffffffda RBX: 00007fff5684ebd0 RCX: 00000000004901eb
[ 21.589048][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.589050][ T231] RBP: 00007fff5684e6b0 R08: 0000000000000000 R09: 0000000000000000
[ 21.589053][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fff5684eb48
[ 21.589056][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.589069][ T231]
[ 21.589072][ T231]
[ 21.600419][ T231] The buggy address belongs to the physical page:
[ 21.600773][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bb6e500 pfn:0xbb6c
[ 21.601374][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 21.601700][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 21.602228][ T231] raw: ffff88800bb6e500 0000000000000000 00000001ffffffff 0000000000000000
[ 21.602704][ T231] page dumped because: kasan: bad access detected
[ 21.603021][ T231]
[ 21.603160][ T231] Memory state around the buggy address:
[ 21.603417][ T231] ffff88800bb6c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.603800][ T231] ffff88800bb6c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.604184][ T231] >ffff88800bb6c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.604576][ T231] ^
[ 21.604831][ T231] ffff88800bb6c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.605215][ T231] ffff88800bb6c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.605594][ T231] ==================================================================
[ 21.605982][ T231] Disabling lock debugging due to kernel taint
[ 21.606311][ T231] ------------[ cut here ]------------
[ 21.606548][ T231] refcount_t: underflow; use-after-free.
[ 21.606843][ T231] WARNING: CPU: 1 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.607329][ T231] Modules linked in:
[ 21.607534][ T231] CPU: 1 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.608129][ T231] Tainted: [B]=BAD_PAGE
[ 21.608330][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.608674][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.609049][ 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 65 99 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
[ 21.610066][ T231] RSP: 0018:ffffc90000aa7ce8 EFLAGS: 00010282
[ 21.610425][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.610850][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.611321][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff33fe134
[ 21.611732][ T231] R10: 0000000000000003 R11: ffffc90000aa7880 R12: 0000000000000001
[ 21.612122][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.612500][ T231] FS: 000000001a7ba3c0(0000) GS:ffff88809ae9a000(0000) knlGS:0000000000000000
[ 21.612949][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.613263][ T231] CR2: 00007f930f6e2000 CR3: 0000000009682003 CR4: 0000000000772ef0
[ 21.613640][ T231] PKRU: 55555554
[ 21.613849][ T231] Call Trace:
[ 21.614037][ T231]
[ 21.614160][ T231] netdev_run_todo+0x5f0/0xc60
[ 21.614422][ T231] ? rtnl_is_locked+0x15/0x20
[ 21.614683][ T231] ? netif_state_change+0x228/0x2c0
[ 21.614968][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.615297][ T231] ? generic_xdp_install+0x410/0x410
[ 21.615568][ T231] ? tun_chr_close+0xae/0x1c0
[ 21.615840][ T231] tun_chr_close+0xc0/0x1c0
[ 21.616121][ T231] __fput+0x35c/0xa70
[ 21.616344][ T231] fput_close_sync+0xdd/0x1b0
[ 21.616620][ T231] ? alloc_file_clone+0xf0/0xf0
[ 21.616904][ T231] __x64_sys_close+0x7d/0xd0
[ 21.617178][ T231] do_syscall_64+0xc1/0xfd0
[ 21.617441][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.617754][ T231] RIP: 0033:0x4901eb
[ 21.617954][ 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
[ 21.618857][ T231] RSP: 002b:00007fff5684e670 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.619270][ T231] RAX: ffffffffffffffda RBX: 00007fff5684ebd0 RCX: 00000000004901eb
[ 21.619696][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.620087][ T231] RBP: 00007fff5684e6b0 R08: 0000000000000000 R09: 0000000000000000
[ 21.620448][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007fff5684eb48
[ 21.620847][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.621263][ T231]
[ 21.621479][ T231] irq event stamp: 1926843
[ 21.621739][ T231] hardirqs last enabled at (1926843): [] irqentry_exit+0x3b/0x80
[ 21.622233][ T231] hardirqs last disabled at (1926842): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 21.622760][ T231] softirqs last enabled at (1926768): [] handle_softirqs+0x352/0x610
[ 21.623151][ T231] softirqs last disabled at (1926591): [] irq_exit_rcu+0xab/0x100
[ 21.623456][ T231] ---[ end trace 0000000000000000 ]---