[ 16.317796][ T231] ==================================================================
[ 16.318109][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.318328][ T231] Read of size 1 at addr ffff888008df068c by task packetdrill/231
[ 16.318556][ T231]
[ 16.318650][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.318656][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.318658][ T231] Call Trace:
[ 16.318661][ T231]
[ 16.318663][ T231] dump_stack_lvl+0x82/0xc0
[ 16.318670][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.318678][ T231] ? kobject_put+0xbb/0xd0
[ 16.318681][ T231] print_report+0xb4/0x270
[ 16.318685][ T231] ? kobject_put+0xbb/0xd0
[ 16.318688][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.318692][ T231] ? kobject_put+0xbb/0xd0
[ 16.318695][ T231] kasan_report+0xca/0x100
[ 16.318699][ T231] ? kobject_put+0xbb/0xd0
[ 16.318704][ T231] kobject_put+0xbb/0xd0
[ 16.318708][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.318713][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.318718][ T231] ? netif_state_change+0x228/0x2c0
[ 16.318721][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.318724][ T231] ? generic_xdp_install+0x410/0x410
[ 16.318728][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.318736][ T231] tun_chr_close+0xc0/0x1c0
[ 16.318740][ T231] __fput+0x35c/0xa70
[ 16.318748][ T231] fput_close_sync+0xdd/0x1b0
[ 16.318751][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.318756][ T231] __x64_sys_close+0x7d/0xd0
[ 16.318760][ T231] do_syscall_64+0xc1/0xfd0
[ 16.318766][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.318772][ T231] RIP: 0033:0x4901eb
[ 16.318777][ 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
[ 16.318780][ T231] RSP: 002b:00007fffad321f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.318784][ T231] RAX: ffffffffffffffda RBX: 00007fffad3224f0 RCX: 00000000004901eb
[ 16.318786][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.318788][ T231] RBP: 00007fffad321fd0 R08: 0000000000000000 R09: 0000000000000000
[ 16.318790][ T231] R10: 000000000f96dac0 R11: 0000000000000293 R12: 00007fffad322468
[ 16.318792][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.318799][ T231]
[ 16.318800][ T231]
[ 16.325731][ T231] The buggy address belongs to the physical page:
[ 16.325996][ T231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888008df3d00 pfn:0x8df0
[ 16.326394][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.326615][ T231] raw: 0080000000000000 ffffea0000285508 ffff88803093bc40 0000000000000000
[ 16.326902][ T231] raw: ffff888008df3d00 0000000000000000 00000000ffffffff 0000000000000000
[ 16.327189][ T231] page dumped because: kasan: bad access detected
[ 16.327470][ T231]
[ 16.327556][ T231] Memory state around the buggy address:
[ 16.327785][ T231] ffff888008df0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.328087][ T231] ffff888008df0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.328400][ T231] >ffff888008df0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.328760][ T231] ^
[ 16.328974][ T231] ffff888008df0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.329213][ T231] ffff888008df0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.329484][ T231] ==================================================================
[ 16.329846][ T231] Disabling lock debugging due to kernel taint
[ 16.330069][ T231] ------------[ cut here ]------------
[ 16.330310][ T231] refcount_t: underflow; use-after-free.
[ 16.330545][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.330932][ T231] Modules linked in:
[ 16.331102][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.331524][ T231] Tainted: [B]=BAD_PAGE
[ 16.331755][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.332040][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.332294][ 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 c5 aa 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
[ 16.333028][ T231] RSP: 0018:ffffc90000ae7ce8 EFLAGS: 00010282
[ 16.333286][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.333567][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.333841][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff56be134
[ 16.334121][ T231] R10: 0000000000000003 R11: ffffc90000ae7880 R12: 0000000000000001
[ 16.334451][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.334737][ T231] FS: 000000000f9663c0(0000) GS:ffff888083f1a000(0000) knlGS:0000000000000000
[ 16.335052][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.335349][ T231] CR2: 00007fb74eda0000 CR3: 00000000027e0005 CR4: 0000000000772ef0
[ 16.335701][ T231] PKRU: 55555554
[ 16.335897][ T231] Call Trace:
[ 16.336047][ T231]
[ 16.336149][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.336402][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.336618][ T231] ? netif_state_change+0x228/0x2c0
[ 16.336834][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.337098][ T231] ? generic_xdp_install+0x410/0x410
[ 16.337298][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.337524][ T231] tun_chr_close+0xc0/0x1c0
[ 16.337713][ T231] __fput+0x35c/0xa70
[ 16.337864][ T231] fput_close_sync+0xdd/0x1b0
[ 16.338068][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.338324][ T231] __x64_sys_close+0x7d/0xd0
[ 16.338521][ T231] do_syscall_64+0xc1/0xfd0
[ 16.338750][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.339180][ T231] RIP: 0033:0x4901eb
[ 16.339398][ 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
[ 16.340336][ T231] RSP: 002b:00007fffad321f90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.340601][ T231] RAX: ffffffffffffffda RBX: 00007fffad3224f0 RCX: 00000000004901eb
[ 16.340860][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.341309][ T231] RBP: 00007fffad321fd0 R08: 0000000000000000 R09: 0000000000000000
[ 16.341627][ T231] R10: 000000000f96dac0 R11: 0000000000000293 R12: 00007fffad322468
[ 16.342013][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.342362][ T231]
[ 16.342529][ T231] irq event stamp: 1826669
[ 16.342758][ T231] hardirqs last enabled at (1826669): [] irqentry_exit+0x3b/0x80
[ 16.343224][ T231] hardirqs last disabled at (1826668): [] handle_softirqs+0x47f/0x610
[ 16.343571][ T231] softirqs last enabled at (1826462): [] __tun_set_ebpf+0xc6/0x180
[ 16.344023][ T231] softirqs last disabled at (1826460): [] __tun_set_ebpf+0x91/0x180
[ 16.344370][ T231] ---[ end trace 0000000000000000 ]---