[ 19.346863][ T232] ==================================================================
[ 19.347382][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 19.347754][ T232] Read of size 1 at addr ffff8880028c868c by task packetdrill/232
[ 19.348185][ T232]
[ 19.348330][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.348339][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.348343][ T232] Call Trace:
[ 19.348346][ T232]
[ 19.348350][ T232] dump_stack_lvl+0x82/0xc0
[ 19.348359][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 19.348369][ T232] ? kobject_put+0xbb/0xd0
[ 19.348376][ T232] print_report+0xb4/0x270
[ 19.348382][ T232] ? kobject_put+0xbb/0xd0
[ 19.348387][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 19.348393][ T232] ? kobject_put+0xbb/0xd0
[ 19.348398][ T232] kasan_report+0xca/0x100
[ 19.348405][ T232] ? kobject_put+0xbb/0xd0
[ 19.348415][ T232] kobject_put+0xbb/0xd0
[ 19.348420][ T232] netdev_run_todo+0x5f0/0xc60
[ 19.348429][ T232] ? rtnl_is_locked+0x15/0x20
[ 19.348434][ T232] ? netif_state_change+0x228/0x2c0
[ 19.348440][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.348445][ T232] ? generic_xdp_install+0x410/0x410
[ 19.348453][ T232] ? tun_chr_close+0xae/0x1c0
[ 19.348465][ T232] tun_chr_close+0xc0/0x1c0
[ 19.348471][ T232] __fput+0x35c/0xa70
[ 19.348485][ T232] fput_close_sync+0xdd/0x1b0
[ 19.348491][ T232] ? alloc_file_clone+0xf0/0xf0
[ 19.348500][ T232] __x64_sys_close+0x7d/0xd0
[ 19.348507][ T232] do_syscall_64+0xc1/0xfd0
[ 19.348516][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.348522][ T232] RIP: 0033:0x4901eb
[ 19.348529][ 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
[ 19.348534][ T232] RSP: 002b:00007ffded38fdb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.348540][ T232] RAX: ffffffffffffffda RBX: 00007ffded390310 RCX: 00000000004901eb
[ 19.348544][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.348547][ T232] RBP: 00007ffded38fdf0 R08: 0000000000000000 R09: 0000000000000000
[ 19.348550][ T232] R10: 00000000072adae0 R11: 0000000000000293 R12: 00007ffded390288
[ 19.348553][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.348564][ T232]
[ 19.348566][ T232]
[ 19.357848][ T232] The buggy address belongs to the physical page:
[ 19.358122][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880028cae00 pfn:0x28c8
[ 19.358526][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 19.358719][ T232] raw: 0080000000000000 ffffea000046ef08 ffff88803623bc40 0000000000000000
[ 19.359071][ T232] raw: ffff8880028cae00 0000000000000000 00000000ffffffff 0000000000000000
[ 19.359441][ T232] page dumped because: kasan: bad access detected
[ 19.359686][ T232]
[ 19.359789][ T232] Memory state around the buggy address:
[ 19.359961][ T232] ffff8880028c8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.360221][ T232] ffff8880028c8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.360526][ T232] >ffff8880028c8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.360903][ T232] ^
[ 19.361104][ T232] ffff8880028c8700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.361375][ T232] ffff8880028c8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.361650][ T232] ==================================================================
[ 19.362152][ T232] Disabling lock debugging due to kernel taint
[ 19.362420][ T232] ------------[ cut here ]------------
[ 19.362611][ T232] refcount_t: underflow; use-after-free.
[ 19.362861][ T232] WARNING: CPU: 0 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.363337][ T232] Modules linked in:
[ 19.363490][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.363883][ T232] Tainted: [B]=BAD_PAGE
[ 19.364113][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.364412][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.364683][ 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 25 87 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
[ 19.365493][ T232] RSP: 0018:ffffc90000ad7ce8 EFLAGS: 00010282
[ 19.365770][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.366120][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.366385][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0f7e134
[ 19.366734][ T232] R10: 0000000000000003 R11: ffffc90000ad7880 R12: 0000000000000001
[ 19.366991][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.367262][ T232] FS: 000000000728e3c0(0000) GS:ffff8880ad21a000(0000) knlGS:0000000000000000
[ 19.367659][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.368007][ T232] CR2: 00007f2c49469000 CR3: 00000000029d8005 CR4: 0000000000772ef0
[ 19.368476][ T232] PKRU: 55555554
[ 19.368612][ T232] Call Trace:
[ 19.368754][ T232]
[ 19.368846][ T232] netdev_run_todo+0x5f0/0xc60
[ 19.369042][ T232] ? rtnl_is_locked+0x15/0x20
[ 19.369231][ T232] ? netif_state_change+0x228/0x2c0
[ 19.369401][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.369642][ T232] ? generic_xdp_install+0x410/0x410
[ 19.369849][ T232] ? tun_chr_close+0xae/0x1c0
[ 19.370180][ T232] tun_chr_close+0xc0/0x1c0
[ 19.370446][ T232] __fput+0x35c/0xa70
[ 19.370600][ T232] fput_close_sync+0xdd/0x1b0
[ 19.370809][ T232] ? alloc_file_clone+0xf0/0xf0
[ 19.371024][ T232] __x64_sys_close+0x7d/0xd0
[ 19.371406][ T232] do_syscall_64+0xc1/0xfd0
[ 19.371644][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.371890][ T232] RIP: 0033:0x4901eb
[ 19.372088][ 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
[ 19.372952][ T232] RSP: 002b:00007ffded38fdb0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.373395][ T232] RAX: ffffffffffffffda RBX: 00007ffded390310 RCX: 00000000004901eb
[ 19.373653][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.373929][ T232] RBP: 00007ffded38fdf0 R08: 0000000000000000 R09: 0000000000000000
[ 19.374341][ T232] R10: 00000000072adae0 R11: 0000000000000293 R12: 00007ffded390288
[ 19.374662][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.375026][ T232]
[ 19.375165][ T232] irq event stamp: 2099389
[ 19.375431][ T232] hardirqs last enabled at (2099389): [] irqentry_exit+0x3b/0x80
[ 19.375788][ T232] hardirqs last disabled at (2099388): [] handle_softirqs+0x47f/0x610
[ 19.376266][ T232] softirqs last enabled at (2099296): [] handle_softirqs+0x352/0x610
[ 19.376591][ T232] softirqs last disabled at (2099287): [] irq_exit_rcu+0xab/0x100
[ 19.377050][ T232] ---[ end trace 0000000000000000 ]---