[ 16.622340][ T230] ==================================================================
[ 16.622664][ T230] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.622876][ T230] Read of size 1 at addr ffff88800c59868c by task packetdrill/230
[ 16.623122][ T230]
[ 16.623208][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.623214][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.623217][ T230] Call Trace:
[ 16.623219][ T230]
[ 16.623221][ T230] dump_stack_lvl+0x82/0xc0
[ 16.623227][ T230] print_address_description.constprop.0+0x2c/0x3a0
[ 16.623236][ T230] ? kobject_put+0xbb/0xd0
[ 16.623240][ T230] print_report+0xb4/0x270
[ 16.623243][ T230] ? kobject_put+0xbb/0xd0
[ 16.623246][ T230] ? kasan_addr_to_slab+0x21/0x70
[ 16.623250][ T230] ? kobject_put+0xbb/0xd0
[ 16.623253][ T230] kasan_report+0xca/0x100
[ 16.623257][ T230] ? kobject_put+0xbb/0xd0
[ 16.623263][ T230] kobject_put+0xbb/0xd0
[ 16.623266][ T230] netdev_run_todo+0x5f0/0xc60
[ 16.623272][ T230] ? rtnl_is_locked+0x15/0x20
[ 16.623276][ T230] ? netif_state_change+0x228/0x2c0
[ 16.623279][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.623282][ T230] ? generic_xdp_install+0x410/0x410
[ 16.623287][ T230] ? tun_chr_close+0xae/0x1c0
[ 16.623295][ T230] tun_chr_close+0xc0/0x1c0
[ 16.623299][ T230] __fput+0x35c/0xa70
[ 16.623307][ T230] fput_close_sync+0xdd/0x1b0
[ 16.623310][ T230] ? alloc_file_clone+0xf0/0xf0
[ 16.623315][ T230] __x64_sys_close+0x7d/0xd0
[ 16.623318][ T230] do_syscall_64+0xc1/0xfd0
[ 16.623324][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.623329][ T230] RIP: 0033:0x4901eb
[ 16.623336][ T230] 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
[ 16.623340][ T230] RSP: 002b:00007ffdf73f9ad0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.623345][ T230] RAX: ffffffffffffffda RBX: 00007ffdf73fa030 RCX: 00000000004901eb
[ 16.623347][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.623349][ T230] RBP: 00007ffdf73f9b10 R08: 0000000000000000 R09: 0000000000000000
[ 16.623351][ T230] R10: 000000001874a740 R11: 0000000000000293 R12: 00007ffdf73f9fa8
[ 16.623353][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.623359][ T230]
[ 16.623361][ T230]
[ 16.629788][ T230] The buggy address belongs to the physical page:
[ 16.629984][ T230] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800c599000 pfn:0xc598
[ 16.630317][ T230] flags: 0x80000000000000(node=0|zone=1)
[ 16.630484][ T230] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.630773][ T230] raw: ffff88800c599000 0000000000000000 00000001ffffffff 0000000000000000
[ 16.631066][ T230] page dumped because: kasan: bad access detected
[ 16.631260][ T230]
[ 16.631339][ T230] Memory state around the buggy address:
[ 16.631501][ T230] ffff88800c598580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.631729][ T230] ffff88800c598600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.631959][ T230] >ffff88800c598680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.632193][ T230] ^
[ 16.632319][ T230] ffff88800c598700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.632548][ T230] ffff88800c598780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.632792][ T230] ==================================================================
[ 16.633134][ T230] Disabling lock debugging due to kernel taint
[ 16.633349][ T230] ------------[ cut here ]------------
[ 16.633498][ T230] refcount_t: underflow; use-after-free.
[ 16.633680][ T230] WARNING: CPU: 3 PID: 230 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.634061][ T230] Modules linked in:
[ 16.634202][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.634635][ T230] Tainted: [B]=BAD_PAGE
[ 16.634752][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.634946][ T230] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.635163][ T230] 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 97 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
[ 16.635800][ T230] RSP: 0018:ffffc90000b37ce8 EFLAGS: 00010282
[ 16.636081][ T230] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.636321][ T230] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.636555][ T230] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff30fe134
[ 16.636877][ T230] R10: 0000000000000003 R11: ffffc90000b37880 R12: 0000000000000001
[ 16.637138][ T230] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.637487][ T230] FS: 00000000187423c0(0000) GS:ffff88809c79a000(0000) knlGS:0000000000000000
[ 16.637766][ T230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.637963][ T230] CR2: 00007fe58694f000 CR3: 0000000004c05006 CR4: 0000000000772ef0
[ 16.638288][ T230] PKRU: 55555554
[ 16.638406][ T230] Call Trace:
[ 16.638524][ T230]
[ 16.638604][ T230] netdev_run_todo+0x5f0/0xc60
[ 16.638764][ T230] ? rtnl_is_locked+0x15/0x20
[ 16.639003][ T230] ? netif_state_change+0x228/0x2c0
[ 16.639166][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.639381][ T230] ? generic_xdp_install+0x410/0x410
[ 16.639546][ T230] ? tun_chr_close+0xae/0x1c0
[ 16.639801][ T230] tun_chr_close+0xc0/0x1c0
[ 16.639955][ T230] __fput+0x35c/0xa70
[ 16.640091][ T230] fput_close_sync+0xdd/0x1b0
[ 16.640270][ T230] ? alloc_file_clone+0xf0/0xf0
[ 16.640521][ T230] __x64_sys_close+0x7d/0xd0
[ 16.640673][ T230] do_syscall_64+0xc1/0xfd0
[ 16.640841][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.641049][ T230] RIP: 0033:0x4901eb
[ 16.641292][ T230] 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
[ 16.641906][ T230] RSP: 002b:00007ffdf73f9ad0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.642256][ T230] RAX: ffffffffffffffda RBX: 00007ffdf73fa030 RCX: 00000000004901eb
[ 16.642499][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.642832][ T230] RBP: 00007ffdf73f9b10 R08: 0000000000000000 R09: 0000000000000000
[ 16.643096][ T230] R10: 000000001874a740 R11: 0000000000000293 R12: 00007ffdf73f9fa8
[ 16.643351][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.643681][ T230]
[ 16.643817][ T230] irq event stamp: 1949509
[ 16.643994][ T230] hardirqs last enabled at (1949509): [] irqentry_exit+0x3b/0x80
[ 16.644373][ T230] hardirqs last disabled at (1949508): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 16.644696][ T230] softirqs last enabled at (1949434): [] handle_softirqs+0x352/0x610
[ 16.645056][ T230] softirqs last disabled at (1949429): [] irq_exit_rcu+0xab/0x100
[ 16.645338][ T230] ---[ end trace 0000000000000000 ]---