[ 20.402758][ T231] ==================================================================
[ 20.403062][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 20.403301][ T231] Read of size 1 at addr ffff88801185468c by task packetdrill/231
[ 20.403558][ T231]
[ 20.403645][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.403650][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.403653][ T231] Call Trace:
[ 20.403655][ T231]
[ 20.403657][ T231] dump_stack_lvl+0x82/0xc0
[ 20.403662][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 20.403669][ T231] ? kobject_put+0xbb/0xd0
[ 20.403672][ T231] print_report+0xb4/0x270
[ 20.403676][ T231] ? kobject_put+0xbb/0xd0
[ 20.403679][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 20.403683][ T231] ? kobject_put+0xbb/0xd0
[ 20.403686][ T231] kasan_report+0xca/0x100
[ 20.403690][ T231] ? kobject_put+0xbb/0xd0
[ 20.403695][ T231] kobject_put+0xbb/0xd0
[ 20.403698][ T231] netdev_run_todo+0x5f0/0xc60
[ 20.403703][ T231] ? rtnl_is_locked+0x15/0x20
[ 20.403706][ T231] ? netif_state_change+0x228/0x2c0
[ 20.403709][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.403712][ T231] ? generic_xdp_install+0x410/0x410
[ 20.403716][ T231] ? tun_chr_close+0xae/0x1c0
[ 20.403723][ T231] tun_chr_close+0xc0/0x1c0
[ 20.403726][ T231] __fput+0x35c/0xa70
[ 20.403734][ T231] fput_close_sync+0xdd/0x1b0
[ 20.403737][ T231] ? alloc_file_clone+0xf0/0xf0
[ 20.403741][ T231] __x64_sys_close+0x7d/0xd0
[ 20.403745][ T231] do_syscall_64+0xc1/0xfd0
[ 20.403750][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.403754][ T231] RIP: 0033:0x4901eb
[ 20.403759][ 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
[ 20.403761][ T231] RSP: 002b:00007ffdae086c60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.403765][ T231] RAX: ffffffffffffffda RBX: 00007ffdae0871c0 RCX: 00000000004901eb
[ 20.403767][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 20.403769][ T231] RBP: 00007ffdae086ca0 R08: 0000000000000000 R09: 0000000000000000
[ 20.403771][ T231] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffdae087138
[ 20.403772][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.403779][ T231]
[ 20.403780][ T231]
[ 20.411040][ T231] The buggy address belongs to the physical page:
[ 20.411262][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11854
[ 20.411565][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 20.411750][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 20.412089][ T231] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
[ 20.412417][ T231] page dumped because: kasan: bad access detected
[ 20.412626][ T231]
[ 20.412717][ T231] Memory state around the buggy address:
[ 20.412886][ T231] ffff888011854580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.413163][ T231] ffff888011854600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.413447][ T231] >ffff888011854680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.413691][ T231] ^
[ 20.413857][ T231] ffff888011854700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.414113][ T231] ffff888011854780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.414369][ T231] ==================================================================
[ 20.414697][ T231] Disabling lock debugging due to kernel taint
[ 20.414936][ T231] ------------[ cut here ]------------
[ 20.415118][ T231] refcount_t: underflow; use-after-free.
[ 20.415462][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.415781][ T231] Modules linked in:
[ 20.415942][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.416373][ T231] Tainted: [B]=BAD_PAGE
[ 20.416520][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.416751][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.417028][ 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 65 86 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
[ 20.417661][ T231] RSP: 0018:ffffc90000b27ce8 EFLAGS: 00010282
[ 20.417897][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.418210][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.418502][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff0dfe134
[ 20.418771][ T231] R10: 0000000000000003 R11: ffffc90000b27880 R12: 0000000000000001
[ 20.419056][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.419344][ T231] FS: 000000003a5d83c0(0000) GS:ffff8880adf1a000(0000) knlGS:0000000000000000
[ 20.419659][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.419895][ T231] CR2: 00007fc129cbc000 CR3: 0000000005fe7002 CR4: 0000000000772ef0
[ 20.420197][ T231] PKRU: 55555554
[ 20.420357][ T231] Call Trace:
[ 20.420503][ T231]
[ 20.420616][ T231] netdev_run_todo+0x5f0/0xc60
[ 20.420811][ T231] ? rtnl_is_locked+0x15/0x20
[ 20.421022][ T231] ? netif_state_change+0x228/0x2c0
[ 20.421225][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.421482][ T231] ? generic_xdp_install+0x410/0x410
[ 20.421669][ T231] ? tun_chr_close+0xae/0x1c0
[ 20.421859][ T231] tun_chr_close+0xc0/0x1c0
[ 20.422084][ T231] __fput+0x35c/0xa70
[ 20.422256][ T231] fput_close_sync+0xdd/0x1b0
[ 20.422442][ T231] ? alloc_file_clone+0xf0/0xf0
[ 20.422648][ T231] __x64_sys_close+0x7d/0xd0
[ 20.422861][ T231] do_syscall_64+0xc1/0xfd0
[ 20.423066][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.423336][ T231] RIP: 0033:0x4901eb
[ 20.423490][ 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
[ 20.424121][ T231] RSP: 002b:00007ffdae086c60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.424402][ T231] RAX: ffffffffffffffda RBX: 00007ffdae0871c0 RCX: 00000000004901eb
[ 20.424672][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 20.424947][ T231] RBP: 00007ffdae086ca0 R08: 0000000000000000 R09: 0000000000000000
[ 20.425233][ T231] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffdae087138
[ 20.425500][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.425791][ T231]
[ 20.425954][ T231] irq event stamp: 2108341
[ 20.426156][ T231] hardirqs last enabled at (2108341): [] irqentry_exit+0x3b/0x80
[ 20.426483][ T231] hardirqs last disabled at (2108340): [] handle_softirqs+0x47f/0x610
[ 20.426813][ T231] softirqs last enabled at (2108148): [] __tun_set_ebpf+0xc6/0x180
[ 20.427148][ T231] softirqs last disabled at (2108146): [] __tun_set_ebpf+0x91/0x180
[ 20.427466][ T231] ---[ end trace 0000000000000000 ]---