[ 16.374768][ T230] ==================================================================
[ 16.375071][ T230] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.375288][ T230] Read of size 1 at addr ffff88800ee6c68c by task packetdrill/230
[ 16.375529][ T230]
[ 16.375615][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.375620][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.375623][ T230] Call Trace:
[ 16.375627][ T230]
[ 16.375629][ T230] dump_stack_lvl+0x82/0xc0
[ 16.375635][ T230] print_address_description.constprop.0+0x2c/0x3a0
[ 16.375647][ T230] ? kobject_put+0xbb/0xd0
[ 16.375651][ T230] print_report+0xb4/0x270
[ 16.375654][ T230] ? kobject_put+0xbb/0xd0
[ 16.375657][ T230] ? kasan_addr_to_slab+0x21/0x70
[ 16.375661][ T230] ? kobject_put+0xbb/0xd0
[ 16.375664][ T230] kasan_report+0xca/0x100
[ 16.375668][ T230] ? kobject_put+0xbb/0xd0
[ 16.375673][ T230] kobject_put+0xbb/0xd0
[ 16.375677][ T230] netdev_run_todo+0x5f0/0xc60
[ 16.375683][ T230] ? rtnl_is_locked+0x15/0x20
[ 16.375688][ T230] ? netif_state_change+0x228/0x2c0
[ 16.375691][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.375694][ T230] ? generic_xdp_install+0x410/0x410
[ 16.375698][ T230] ? tun_chr_close+0xae/0x1c0
[ 16.375707][ T230] tun_chr_close+0xc0/0x1c0
[ 16.375710][ T230] __fput+0x35c/0xa70
[ 16.375719][ T230] fput_close_sync+0xdd/0x1b0
[ 16.375722][ T230] ? alloc_file_clone+0xf0/0xf0
[ 16.375727][ T230] __x64_sys_close+0x7d/0xd0
[ 16.375730][ T230] do_syscall_64+0xc1/0xfd0
[ 16.375737][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.375742][ T230] RIP: 0033:0x4901eb
[ 16.375748][ 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
[ 16.375753][ T230] RSP: 002b:00007ffef2146570 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.375758][ T230] RAX: ffffffffffffffda RBX: 00007ffef2146ad0 RCX: 00000000004901eb
[ 16.375761][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.375763][ T230] RBP: 00007ffef21465b0 R08: 0000000000000000 R09: 0000000000000000
[ 16.375766][ T230] R10: 0000000000800000 R11: 0000000000000293 R12: 00007ffef2146a48
[ 16.375769][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.375776][ T230]
[ 16.375777][ T230]
[ 16.382248][ T230] The buggy address belongs to the physical page:
[ 16.382451][ T230] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee6c
[ 16.382742][ T230] flags: 0x80000000000000(node=0|zone=1)
[ 16.382920][ T230] raw: 0080000000000000 ffffea0000451f08 ffff8880363bbc40 0000000000000000
[ 16.383206][ T230] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 16.383501][ T230] page dumped because: kasan: bad access detected
[ 16.383692][ T230]
[ 16.383779][ T230] Memory state around the buggy address:
[ 16.383935][ T230] ffff88800ee6c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.384323][ T230] ffff88800ee6c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.384553][ T230] >ffff88800ee6c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.384796][ T230] ^
[ 16.384911][ T230] ffff88800ee6c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.385140][ T230] ffff88800ee6c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.385381][ T230] ==================================================================
[ 16.385635][ T230] Disabling lock debugging due to kernel taint
[ 16.385961][ T230] ------------[ cut here ]------------
[ 16.386113][ T230] refcount_t: underflow; use-after-free.
[ 16.386287][ T230] WARNING: CPU: 3 PID: 230 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.386575][ T230] Modules linked in:
[ 16.386702][ T230] CPU: 3 UID: 0 PID: 230 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.387070][ T230] Tainted: [B]=BAD_PAGE
[ 16.387188][ T230] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.387391][ T230] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.387590][ 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 85 8b 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
[ 16.388155][ T230] RSP: 0018:ffffc90000ae7ce8 EFLAGS: 00010282
[ 16.388363][ T230] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.388593][ T230] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.388924][ T230] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff183e134
[ 16.389156][ T230] R10: 0000000000000003 R11: ffffc90000ae7880 R12: 0000000000000001
[ 16.389485][ T230] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.389715][ T230] FS: 00000000069da3c0(0000) GS:ffff8880a8d9a000(0000) knlGS:0000000000000000
[ 16.389997][ T230] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.390284][ T230] CR2: 00007f1f13533000 CR3: 00000000076f3003 CR4: 0000000000772ef0
[ 16.390522][ T230] PKRU: 55555554
[ 16.390641][ T230] Call Trace:
[ 16.390765][ T230]
[ 16.390855][ T230] netdev_run_todo+0x5f0/0xc60
[ 16.391011][ T230] ? rtnl_is_locked+0x15/0x20
[ 16.391167][ T230] ? netif_state_change+0x228/0x2c0
[ 16.391327][ T230] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.391605][ T230] ? generic_xdp_install+0x410/0x410
[ 16.391765][ T230] ? tun_chr_close+0xae/0x1c0
[ 16.391930][ T230] tun_chr_close+0xc0/0x1c0
[ 16.392087][ T230] __fput+0x35c/0xa70
[ 16.392297][ T230] fput_close_sync+0xdd/0x1b0
[ 16.392450][ T230] ? alloc_file_clone+0xf0/0xf0
[ 16.392607][ T230] __x64_sys_close+0x7d/0xd0
[ 16.392782][ T230] do_syscall_64+0xc1/0xfd0
[ 16.393037][ T230] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.393231][ T230] RIP: 0033:0x4901eb
[ 16.393372][ 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
[ 16.394040][ T230] RSP: 002b:00007ffef2146570 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.394276][ T230] RAX: ffffffffffffffda RBX: 00007ffef2146ad0 RCX: 00000000004901eb
[ 16.394609][ T230] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.394859][ T230] RBP: 00007ffef21465b0 R08: 0000000000000000 R09: 0000000000000000
[ 16.395088][ T230] R10: 0000000000800000 R11: 0000000000000293 R12: 00007ffef2146a48
[ 16.395409][ T230] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.395641][ T230]
[ 16.395767][ T230] irq event stamp: 1972687
[ 16.396017][ T230] hardirqs last enabled at (1972687): [] irqentry_exit+0x3b/0x80
[ 16.396283][ T230] hardirqs last disabled at (1972686): [] handle_softirqs+0x47f/0x610
[ 16.396643][ T230] softirqs last enabled at (1972496): [] __tun_set_ebpf+0xc6/0x180
[ 16.396919][ T230] softirqs last disabled at (1972494): [] __tun_set_ebpf+0x91/0x180
[ 16.397186][ T230] ---[ end trace 0000000000000000 ]---