[ 17.624976][ T231] ==================================================================
[ 17.625295][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.625519][ T231] Read of size 1 at addr ffff8880093dc68c by task packetdrill/231
[ 17.625790][ T231]
[ 17.625878][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.625883][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.625885][ T231] Call Trace:
[ 17.625887][ T231]
[ 17.625889][ T231] dump_stack_lvl+0x82/0xc0
[ 17.625895][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 17.625904][ T231] ? kobject_put+0xbb/0xd0
[ 17.625907][ T231] print_report+0xb4/0x270
[ 17.625911][ T231] ? kobject_put+0xbb/0xd0
[ 17.625914][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 17.625917][ T231] ? kobject_put+0xbb/0xd0
[ 17.625921][ T231] kasan_report+0xca/0x100
[ 17.625924][ T231] ? kobject_put+0xbb/0xd0
[ 17.625930][ T231] kobject_put+0xbb/0xd0
[ 17.625933][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.625940][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.625945][ T231] ? netif_state_change+0x228/0x2c0
[ 17.625948][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.625951][ T231] ? generic_xdp_install+0x410/0x410
[ 17.625955][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.625964][ T231] tun_chr_close+0xc0/0x1c0
[ 17.625967][ T231] __fput+0x35c/0xa70
[ 17.625976][ T231] fput_close_sync+0xdd/0x1b0
[ 17.625979][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.625984][ T231] __x64_sys_close+0x7d/0xd0
[ 17.625988][ T231] do_syscall_64+0xc1/0xfd0
[ 17.625995][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.625999][ T231] RIP: 0033:0x4901eb
[ 17.626003][ 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
[ 17.626006][ T231] RSP: 002b:00007ffff3eb9ee0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.626011][ T231] RAX: ffffffffffffffda RBX: 00007ffff3eba440 RCX: 00000000004901eb
[ 17.626013][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.626014][ T231] RBP: 00007ffff3eb9f20 R08: 0000000000000000 R09: 0000000000000000
[ 17.626016][ T231] R10: 000000001e9ee230 R11: 0000000000000293 R12: 00007ffff3eba3b8
[ 17.626018][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.626024][ T231]
[ 17.626026][ T231]
[ 17.632984][ T231] The buggy address belongs to the physical page:
[ 17.633196][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff8880093deb00 pfn:0x93dc
[ 17.633548][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 17.633725][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.634032][ T231] raw: ffff8880093deb00 0000000000000000 00000001ffffffff 0000000000000000
[ 17.634334][ T231] page dumped because: kasan: bad access detected
[ 17.634545][ T231]
[ 17.634631][ T231] Memory state around the buggy address:
[ 17.634796][ T231] ffff8880093dc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.635046][ T231] ffff8880093dc600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.635305][ T231] >ffff8880093dc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.635558][ T231] ^
[ 17.635703][ T231] ffff8880093dc700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.635952][ T231] ffff8880093dc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.636195][ T231] ==================================================================
[ 17.636527][ T231] Disabling lock debugging due to kernel taint
[ 17.636764][ T231] ------------[ cut here ]------------
[ 17.636944][ T231] refcount_t: underflow; use-after-free.
[ 17.637154][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.637559][ T231] Modules linked in:
[ 17.637723][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.638119][ T231] Tainted: [B]=BAD_PAGE
[ 17.638281][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.638524][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.638762][ 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 bb 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
[ 17.639383][ T231] RSP: 0018:ffffc90000ae7ce8 EFLAGS: 00010282
[ 17.639631][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.639903][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.640175][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff77fe134
[ 17.640475][ T231] R10: 0000000000000003 R11: ffffc90000ae7880 R12: 0000000000000001
[ 17.640758][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.641033][ T231] FS: 000000001e9e73c0(0000) GS:ffff888078f1a000(0000) knlGS:0000000000000000
[ 17.641347][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.641602][ T231] CR2: 00007fcf3db8fa20 CR3: 0000000004f29006 CR4: 0000000000772ef0
[ 17.641874][ T231] PKRU: 55555554
[ 17.642021][ T231] Call Trace:
[ 17.642167][ T231]
[ 17.642276][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.642477][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.642669][ T231] ? netif_state_change+0x228/0x2c0
[ 17.642858][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.643085][ T231] ? generic_xdp_install+0x410/0x410
[ 17.643270][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.643468][ T231] tun_chr_close+0xc0/0x1c0
[ 17.643657][ T231] __fput+0x35c/0xa70
[ 17.643807][ T231] fput_close_sync+0xdd/0x1b0
[ 17.643994][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.644185][ T231] __x64_sys_close+0x7d/0xd0
[ 17.644375][ T231] do_syscall_64+0xc1/0xfd0
[ 17.644571][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.644801][ T231] RIP: 0033:0x4901eb
[ 17.644955][ 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
[ 17.645569][ T231] RSP: 002b:00007ffff3eb9ee0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.645846][ T231] RAX: ffffffffffffffda RBX: 00007ffff3eba440 RCX: 00000000004901eb
[ 17.646120][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.646400][ T231] RBP: 00007ffff3eb9f20 R08: 0000000000000000 R09: 0000000000000000
[ 17.646681][ T231] R10: 000000001e9ee230 R11: 0000000000000293 R12: 00007ffff3eba3b8
[ 17.646948][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.647222][ T231]
[ 17.647370][ T231] irq event stamp: 1861959
[ 17.647564][ T231] hardirqs last enabled at (1861959): [] irqentry_exit+0x3b/0x80
[ 17.647876][ T231] hardirqs last disabled at (1861958): [] handle_softirqs+0x47f/0x610
[ 17.648188][ T231] softirqs last enabled at (1861766): [] __tun_set_ebpf+0xc6/0x180
[ 17.648506][ T231] softirqs last disabled at (1861764): [] __tun_set_ebpf+0x91/0x180
[ 17.648817][ T231] ---[ end trace 0000000000000000 ]---