[ 16.448902][ T233] ==================================================================
[ 16.449210][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.449430][ T233] Read of size 1 at addr ffff888009bc868c by task packetdrill/233
[ 16.449691][ T233]
[ 16.449781][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.449786][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.449789][ T233] Call Trace:
[ 16.449791][ T233]
[ 16.449793][ T233] dump_stack_lvl+0x82/0xc0
[ 16.449800][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 16.449808][ T233] ? kobject_put+0xbb/0xd0
[ 16.449812][ T233] print_report+0xb4/0x270
[ 16.449815][ T233] ? kobject_put+0xbb/0xd0
[ 16.449818][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 16.449822][ T233] ? kobject_put+0xbb/0xd0
[ 16.449825][ T233] kasan_report+0xca/0x100
[ 16.449829][ T233] ? kobject_put+0xbb/0xd0
[ 16.449835][ T233] kobject_put+0xbb/0xd0
[ 16.449838][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.449844][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.449848][ T233] ? netif_state_change+0x228/0x2c0
[ 16.449851][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.449854][ T233] ? generic_xdp_install+0x410/0x410
[ 16.449858][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.449866][ T233] tun_chr_close+0xc0/0x1c0
[ 16.449870][ T233] __fput+0x35c/0xa70
[ 16.449878][ T233] fput_close_sync+0xdd/0x1b0
[ 16.449882][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.449886][ T233] __x64_sys_close+0x7d/0xd0
[ 16.449890][ T233] do_syscall_64+0xc1/0xfd0
[ 16.449896][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.449901][ T233] RIP: 0033:0x4901eb
[ 16.449905][ 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
[ 16.449908][ T233] RSP: 002b:00007ffd5a8ab9e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.449912][ T233] RAX: ffffffffffffffda RBX: 00007ffd5a8abf40 RCX: 00000000004901eb
[ 16.449914][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.449916][ T233] RBP: 00007ffd5a8aba20 R08: 0000000000000000 R09: 0000000000000000
[ 16.449918][ T233] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffd5a8abeb8
[ 16.449920][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.449926][ T233]
[ 16.449927][ T233]
[ 16.457097][ T233] The buggy address belongs to the physical page:
[ 16.457398][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888009bc8040 pfn:0x9bc8
[ 16.457773][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 16.457950][ T233] raw: 0080000000000000 ffffea0000329408 ffff88803633bc40 0000000000000000
[ 16.458348][ T233] raw: ffff888009bc8040 0000000000000000 00000000ffffffff 0000000000000000
[ 16.458654][ T233] page dumped because: kasan: bad access detected
[ 16.458964][ T233]
[ 16.459048][ T233] Memory state around the buggy address:
[ 16.459209][ T233] ffff888009bc8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.459465][ T233] ffff888009bc8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.459818][ T233] >ffff888009bc8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.460064][ T233] ^
[ 16.460190][ T233] ffff888009bc8700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.460536][ T233] ffff888009bc8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.460816][ T233] ==================================================================
[ 16.461236][ T233] Disabling lock debugging due to kernel taint
[ 16.461493][ T233] ------------[ cut here ]------------
[ 16.461693][ T233] refcount_t: underflow; use-after-free.
[ 16.461937][ T233] WARNING: CPU: 2 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.462536][ T233] Modules linked in:
[ 16.462694][ T233] CPU: 2 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.463110][ T233] Tainted: [B]=BAD_PAGE
[ 16.463269][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.463511][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.463744][ 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 e5 a6 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
[ 16.464467][ T233] RSP: 0018:ffffc90000a87ce8 EFLAGS: 00010282
[ 16.464696][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.464982][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.465273][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4efe134
[ 16.465544][ T233] R10: 0000000000000003 R11: ffffc90000a87880 R12: 0000000000000001
[ 16.465828][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.466227][ T233] FS: 00000000311f03c0(0000) GS:ffff88808d71a000(0000) knlGS:0000000000000000
[ 16.466547][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.466776][ T233] CR2: 00007fb09ee20000 CR3: 0000000004b2b002 CR4: 0000000000772ef0
[ 16.467161][ T233] PKRU: 55555554
[ 16.467317][ T233] Call Trace:
[ 16.467488][ T233]
[ 16.467596][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.467883][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.468096][ T233] ? netif_state_change+0x228/0x2c0
[ 16.468291][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.468537][ T233] ? generic_xdp_install+0x410/0x410
[ 16.468825][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.469037][ T233] tun_chr_close+0xc0/0x1c0
[ 16.469229][ T233] __fput+0x35c/0xa70
[ 16.469385][ T233] fput_close_sync+0xdd/0x1b0
[ 16.469664][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.469863][ T233] __x64_sys_close+0x7d/0xd0
[ 16.470077][ T233] do_syscall_64+0xc1/0xfd0
[ 16.470297][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.470636][ T233] RIP: 0033:0x4901eb
[ 16.470804][ 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
[ 16.471585][ T233] RSP: 002b:00007ffd5a8ab9e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.471881][ T233] RAX: ffffffffffffffda RBX: 00007ffd5a8abf40 RCX: 00000000004901eb
[ 16.472211][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.472507][ T233] RBP: 00007ffd5a8aba20 R08: 0000000000000000 R09: 0000000000000000
[ 16.472786][ T233] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffd5a8abeb8
[ 16.473201][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.473503][ T233]
[ 16.473661][ T233] irq event stamp: 1929579
[ 16.473865][ T233] hardirqs last enabled at (1929579): [] irqentry_exit+0x3b/0x80
[ 16.474327][ T233] hardirqs last disabled at (1929578): [] handle_softirqs+0x47f/0x610
[ 16.474668][ T233] softirqs last enabled at (1929382): [] __tun_set_ebpf+0xc6/0x180
[ 16.475106][ T233] softirqs last disabled at (1929380): [] __tun_set_ebpf+0x91/0x180
[ 16.475455][ T233] ---[ end trace 0000000000000000 ]---