[ 18.833680][ T232] ==================================================================
[ 18.834179][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 18.834532][ T232] Read of size 1 at addr ffff888004d3868c by task packetdrill/232
[ 18.834933][ T232]
[ 18.835073][ T232] CPU: 1 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.835081][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.835085][ T232] Call Trace:
[ 18.835088][ T232]
[ 18.835091][ T232] dump_stack_lvl+0x82/0xc0
[ 18.835100][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 18.835109][ T232] ? kobject_put+0xbb/0xd0
[ 18.835116][ T232] print_report+0xb4/0x270
[ 18.835121][ T232] ? kobject_put+0xbb/0xd0
[ 18.835125][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 18.835131][ T232] ? kobject_put+0xbb/0xd0
[ 18.835136][ T232] kasan_report+0xca/0x100
[ 18.835143][ T232] ? kobject_put+0xbb/0xd0
[ 18.835153][ T232] kobject_put+0xbb/0xd0
[ 18.835159][ T232] netdev_run_todo+0x5f0/0xc60
[ 18.835165][ T232] ? rtnl_is_locked+0x15/0x20
[ 18.835170][ T232] ? netif_state_change+0x228/0x2c0
[ 18.835176][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.835181][ T232] ? generic_xdp_install+0x410/0x410
[ 18.835188][ T232] ? tun_chr_close+0xae/0x1c0
[ 18.835200][ T232] tun_chr_close+0xc0/0x1c0
[ 18.835206][ T232] __fput+0x35c/0xa70
[ 18.835216][ T232] fput_close_sync+0xdd/0x1b0
[ 18.835222][ T232] ? alloc_file_clone+0xf0/0xf0
[ 18.835231][ T232] __x64_sys_close+0x7d/0xd0
[ 18.835237][ T232] do_syscall_64+0xc1/0xfd0
[ 18.835245][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.835251][ T232] RIP: 0033:0x4901eb
[ 18.835257][ 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
[ 18.835262][ T232] RSP: 002b:00007ffcc3c86760 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.835268][ T232] RAX: ffffffffffffffda RBX: 00007ffcc3c86cc0 RCX: 00000000004901eb
[ 18.835272][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.835275][ T232] RBP: 00007ffcc3c867a0 R08: 0000000000000000 R09: 0000000000000000
[ 18.835278][ T232] R10: 000000002f00a3b0 R11: 0000000000000293 R12: 00007ffcc3c86c38
[ 18.835282][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.835294][ T232]
[ 18.835296][ T232]
[ 18.846370][ T232] The buggy address belongs to the physical page:
[ 18.846720][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888004d3ba00 pfn:0x4d38
[ 18.847260][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 18.847542][ T232] raw: 0080000000000000 ffffea0000128808 ffff8880362bbc40 0000000000000000
[ 18.848023][ T232] raw: ffff888004d3ba00 0000000000000000 00000000ffffffff 0000000000000000
[ 18.848501][ T232] page dumped because: kasan: bad access detected
[ 18.848831][ T232]
[ 18.848959][ T232] Memory state around the buggy address:
[ 18.849210][ T232] ffff888004d38580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.849607][ T232] ffff888004d38600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.849989][ T232] >ffff888004d38680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.850374][ T232] ^
[ 18.850567][ T232] ffff888004d38700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.850948][ T232] ffff888004d38780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.851365][ T232] ==================================================================
[ 18.851879][ T232] Disabling lock debugging due to kernel taint
[ 18.852247][ T232] ------------[ cut here ]------------
[ 18.852501][ T232] refcount_t: underflow; use-after-free.
[ 18.852785][ T232] WARNING: CPU: 1 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 18.853254][ T232] Modules linked in:
[ 18.853476][ T232] CPU: 1 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.854083][ T232] Tainted: [B]=BAD_PAGE
[ 18.854317][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.854656][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 18.854997][ 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 8a 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
[ 18.855958][ T232] RSP: 0018:ffffc90000a87ce8 EFLAGS: 00010282
[ 18.856288][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 18.856685][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 18.857074][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff157e134
[ 18.857470][ T232] R10: 0000000000000003 R11: ffffc90000a87880 R12: 0000000000000001
[ 18.857858][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 18.858250][ T232] FS: 000000002f0023c0(0000) GS:ffff8880aa29a000(0000) knlGS:0000000000000000
[ 18.858730][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 18.859056][ T232] CR2: 00007f493ac7c000 CR3: 0000000005821002 CR4: 0000000000772ef0
[ 18.859465][ T232] PKRU: 55555554
[ 18.859663][ T232] Call Trace:
[ 18.859886][ T232]
[ 18.860037][ T232] netdev_run_todo+0x5f0/0xc60
[ 18.860310][ T232] ? rtnl_is_locked+0x15/0x20
[ 18.860592][ T232] ? netif_state_change+0x228/0x2c0
[ 18.860846][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.861166][ T232] ? generic_xdp_install+0x410/0x410
[ 18.861439][ T232] ? tun_chr_close+0xae/0x1c0
[ 18.861704][ T232] tun_chr_close+0xc0/0x1c0
[ 18.861965][ T232] __fput+0x35c/0xa70
[ 18.862177][ T232] fput_close_sync+0xdd/0x1b0
[ 18.862445][ T232] ? alloc_file_clone+0xf0/0xf0
[ 18.862716][ T232] __x64_sys_close+0x7d/0xd0
[ 18.862978][ T232] do_syscall_64+0xc1/0xfd0
[ 18.863259][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.863590][ T232] RIP: 0033:0x4901eb
[ 18.863798][ 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
[ 18.864742][ T232] RSP: 002b:00007ffcc3c86760 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.865133][ T232] RAX: ffffffffffffffda RBX: 00007ffcc3c86cc0 RCX: 00000000004901eb
[ 18.865552][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.865940][ T232] RBP: 00007ffcc3c867a0 R08: 0000000000000000 R09: 0000000000000000
[ 18.866322][ T232] R10: 000000002f00a3b0 R11: 0000000000000293 R12: 00007ffcc3c86c38
[ 18.866716][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.867122][ T232]
[ 18.867336][ T232] irq event stamp: 1059929
[ 18.867603][ T232] hardirqs last enabled at (1059929): [] irqentry_exit+0x3b/0x80
[ 18.868078][ T232] hardirqs last disabled at (1059928): [] handle_softirqs+0x47f/0x610
[ 18.868583][ T232] softirqs last enabled at (1059794): [] handle_softirqs+0x352/0x610
[ 18.869048][ T232] softirqs last disabled at (1059787): [] irq_exit_rcu+0xab/0x100
[ 18.869523][ T232] ---[ end trace 0000000000000000 ]---