[ 17.375452][ T232] ==================================================================
[ 17.375817][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.376044][ T232] Read of size 1 at addr ffff88800946868c by task packetdrill/232
[ 17.376343][ T232]
[ 17.376432][ T232] CPU: 2 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.376437][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.376440][ T232] Call Trace:
[ 17.376442][ T232]
[ 17.376444][ T232] dump_stack_lvl+0x82/0xc0
[ 17.376453][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 17.376461][ T232] ? kobject_put+0xbb/0xd0
[ 17.376465][ T232] print_report+0xb4/0x270
[ 17.376468][ T232] ? kobject_put+0xbb/0xd0
[ 17.376472][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 17.376475][ T232] ? kobject_put+0xbb/0xd0
[ 17.376478][ T232] kasan_report+0xca/0x100
[ 17.376482][ T232] ? kobject_put+0xbb/0xd0
[ 17.376488][ T232] kobject_put+0xbb/0xd0
[ 17.376491][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.376497][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.376501][ T232] ? netif_state_change+0x228/0x2c0
[ 17.376504][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.376507][ T232] ? generic_xdp_install+0x410/0x410
[ 17.376511][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.376519][ T232] tun_chr_close+0xc0/0x1c0
[ 17.376523][ T232] __fput+0x35c/0xa70
[ 17.376531][ T232] fput_close_sync+0xdd/0x1b0
[ 17.376534][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.376539][ T232] __x64_sys_close+0x7d/0xd0
[ 17.376543][ T232] do_syscall_64+0xc1/0xfd0
[ 17.376549][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.376554][ T232] RIP: 0033:0x4901eb
[ 17.376558][ 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
[ 17.376561][ T232] RSP: 002b:00007ffe1f3337a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.376565][ T232] RAX: ffffffffffffffda RBX: 00007ffe1f333d00 RCX: 00000000004901eb
[ 17.376567][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.376569][ T232] RBP: 00007ffe1f3337e0 R08: 0000000000000000 R09: 0000000000000000
[ 17.376571][ T232] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffe1f333c78
[ 17.376573][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.376579][ T232]
[ 17.376581][ T232]
[ 17.384708][ T232] The buggy address belongs to the physical page:
[ 17.384918][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888009468008 pfn:0x9468
[ 17.385274][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 17.385454][ T232] raw: 0080000000000000 ffffea00002fc008 ffff88803633bc40 0000000000000000
[ 17.385771][ T232] raw: ffff888009468008 0000000000000000 00000000ffffffff 0000000000000000
[ 17.386179][ T232] page dumped because: kasan: bad access detected
[ 17.386530][ T232]
[ 17.386653][ T232] Memory state around the buggy address:
[ 17.386850][ T232] ffff888009468580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.387171][ T232] ffff888009468600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.387503][ T232] >ffff888009468680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.387845][ T232] ^
[ 17.388011][ T232] ffff888009468700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.388258][ T232] ffff888009468780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.388503][ T232] ==================================================================
[ 17.388810][ T232] Disabling lock debugging due to kernel taint
[ 17.389043][ T232] ------------[ cut here ]------------
[ 17.389246][ T232] refcount_t: underflow; use-after-free.
[ 17.389463][ T232] WARNING: CPU: 2 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.389797][ T232] Modules linked in:
[ 17.389969][ T232] CPU: 2 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.390497][ T232] Tainted: [B]=BAD_PAGE
[ 17.390650][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.390891][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.391136][ 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 9d 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
[ 17.391765][ T232] RSP: 0018:ffffc90000b07ce8 EFLAGS: 00010282
[ 17.392002][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.392281][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.392551][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3b7e134
[ 17.392827][ T232] R10: 0000000000000003 R11: ffffc90000b07880 R12: 0000000000000001
[ 17.393104][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.393423][ T232] FS: 00000000103c53c0(0000) GS:ffff88809731a000(0000) knlGS:0000000000000000
[ 17.393745][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.393980][ T232] CR2: 00007f183ac2da20 CR3: 000000000bdcf005 CR4: 0000000000772ef0
[ 17.394307][ T232] PKRU: 55555554
[ 17.394502][ T232] Call Trace:
[ 17.394652][ T232]
[ 17.394775][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.394967][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.395163][ T232] ? netif_state_change+0x228/0x2c0
[ 17.395356][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.395583][ T232] ? generic_xdp_install+0x410/0x410
[ 17.395781][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.395970][ T232] tun_chr_close+0xc0/0x1c0
[ 17.396156][ T232] __fput+0x35c/0xa70
[ 17.396313][ T232] fput_close_sync+0xdd/0x1b0
[ 17.396498][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.396687][ T232] __x64_sys_close+0x7d/0xd0
[ 17.396887][ T232] do_syscall_64+0xc1/0xfd0
[ 17.397076][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.397384][ T232] RIP: 0033:0x4901eb
[ 17.397615][ 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
[ 17.398439][ T232] RSP: 002b:00007ffe1f3337a0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.398723][ T232] RAX: ffffffffffffffda RBX: 00007ffe1f333d00 RCX: 00000000004901eb
[ 17.398997][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.399279][ T232] RBP: 00007ffe1f3337e0 R08: 0000000000000000 R09: 0000000000000000
[ 17.399557][ T232] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffe1f333c78
[ 17.399840][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.400122][ T232]
[ 17.400276][ T232] irq event stamp: 1983383
[ 17.400461][ T232] hardirqs last enabled at (1983383): [] irqentry_exit+0x3b/0x80
[ 17.400820][ T232] hardirqs last disabled at (1983382): [] common_interrupt+0x19/0xe0
[ 17.401131][ T232] softirqs last enabled at (1983200): [] __tun_set_ebpf+0xc6/0x180
[ 17.401496][ T232] softirqs last disabled at (1983198): [] __tun_set_ebpf+0x91/0x180
[ 17.401816][ T232] ---[ end trace 0000000000000000 ]---