[ 17.735516][ T232] ==================================================================
[ 17.735828][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.736052][ T232] Read of size 1 at addr ffff88800ad5868c by task packetdrill/232
[ 17.736300][ T232]
[ 17.736394][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.736400][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.736402][ T232] Call Trace:
[ 17.736404][ T232]
[ 17.736406][ T232] dump_stack_lvl+0x82/0xc0
[ 17.736412][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 17.736421][ T232] ? kobject_put+0xbb/0xd0
[ 17.736425][ T232] print_report+0xb4/0x270
[ 17.736428][ T232] ? kobject_put+0xbb/0xd0
[ 17.736431][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 17.736435][ T232] ? kobject_put+0xbb/0xd0
[ 17.736438][ T232] kasan_report+0xca/0x100
[ 17.736442][ T232] ? kobject_put+0xbb/0xd0
[ 17.736447][ T232] kobject_put+0xbb/0xd0
[ 17.736451][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.736457][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.736461][ T232] ? netif_state_change+0x228/0x2c0
[ 17.736464][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.736467][ T232] ? generic_xdp_install+0x410/0x410
[ 17.736471][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.736479][ T232] tun_chr_close+0xc0/0x1c0
[ 17.736483][ T232] __fput+0x35c/0xa70
[ 17.736491][ T232] fput_close_sync+0xdd/0x1b0
[ 17.736494][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.736499][ T232] __x64_sys_close+0x7d/0xd0
[ 17.736503][ T232] do_syscall_64+0xc1/0xfd0
[ 17.736509][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.736513][ T232] RIP: 0033:0x4901eb
[ 17.736517][ 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
[ 17.736520][ T232] RSP: 002b:00007ffd92b25350 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.736525][ T232] RAX: ffffffffffffffda RBX: 00007ffd92b258b0 RCX: 00000000004901eb
[ 17.736527][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.736529][ T232] RBP: 00007ffd92b25390 R08: 0000000000000000 R09: 0000000000000000
[ 17.736531][ T232] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffd92b25828
[ 17.736533][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.736539][ T232]
[ 17.736540][ T232]
[ 17.743414][ T232] The buggy address belongs to the physical page:
[ 17.743620][ T232] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ad59240 pfn:0xad58
[ 17.743963][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 17.744155][ T232] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.744460][ T232] raw: ffff88800ad59240 0000000000000000 00000001ffffffff 0000000000000000
[ 17.744756][ T232] page dumped because: kasan: bad access detected
[ 17.744963][ T232]
[ 17.745061][ T232] Memory state around the buggy address:
[ 17.745225][ T232] ffff88800ad58580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.745468][ T232] ffff88800ad58600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.745718][ T232] >ffff88800ad58680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.745966][ T232] ^
[ 17.746100][ T232] ffff88800ad58700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.746342][ T232] ffff88800ad58780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.746607][ T232] ==================================================================
[ 17.746873][ T232] Disabling lock debugging due to kernel taint
[ 17.747233][ T232] ------------[ cut here ]------------
[ 17.747392][ T232] refcount_t: underflow; use-after-free.
[ 17.747587][ T232] WARNING: CPU: 3 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.747882][ T232] Modules linked in:
[ 17.748022][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.748398][ T232] Tainted: [B]=BAD_PAGE
[ 17.748524][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.748729][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.748947][ 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 c5 8d 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
[ 17.749546][ T232] RSP: 0018:ffffc90000af7ce8 EFLAGS: 00010282
[ 17.749752][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.750003][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.750265][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1cbe134
[ 17.750510][ T232] R10: 0000000000000003 R11: ffffc90000af7880 R12: 0000000000000001
[ 17.750752][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.751009][ T232] FS: 0000000025bf63c0(0000) GS:ffff8880a0f9a000(0000) knlGS:0000000000000000
[ 17.751315][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.751522][ T232] CR2: 00007f74113e7000 CR3: 000000000b82f003 CR4: 0000000000772ef0
[ 17.751769][ T232] PKRU: 55555554
[ 17.751900][ T232] Call Trace:
[ 17.752033][ T232]
[ 17.752120][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.752286][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.752461][ T232] ? netif_state_change+0x228/0x2c0
[ 17.752621][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.752825][ T232] ? generic_xdp_install+0x410/0x410
[ 17.752996][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.753171][ T232] tun_chr_close+0xc0/0x1c0
[ 17.753336][ T232] __fput+0x35c/0xa70
[ 17.753464][ T232] fput_close_sync+0xdd/0x1b0
[ 17.753627][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.753792][ T232] __x64_sys_close+0x7d/0xd0
[ 17.753968][ T232] do_syscall_64+0xc1/0xfd0
[ 17.754141][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.754344][ T232] RIP: 0033:0x4901eb
[ 17.754472][ 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
[ 17.755074][ T232] RSP: 002b:00007ffd92b25350 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.755323][ T232] RAX: ffffffffffffffda RBX: 00007ffd92b258b0 RCX: 00000000004901eb
[ 17.755571][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.755817][ T232] RBP: 00007ffd92b25390 R08: 0000000000000000 R09: 0000000000000000
[ 17.756077][ T232] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffd92b25828
[ 17.756321][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.756576][ T232]
[ 17.756699][ T232] irq event stamp: 2059015
[ 17.756860][ T232] hardirqs last enabled at (2059015): [] irqentry_exit+0x3b/0x80
[ 17.757165][ T232] hardirqs last disabled at (2059014): [] handle_softirqs+0x47f/0x610
[ 17.757450][ T232] softirqs last enabled at (2058824): [] __tun_set_ebpf+0xc6/0x180
[ 17.757731][ T232] softirqs last disabled at (2058822): [] __tun_set_ebpf+0x91/0x180
[ 17.758024][ T232] ---[ end trace 0000000000000000 ]---
[ 17.763883][ T232] packetdrill (232) used greatest stack depth: 24256 bytes left