[ 17.877882][ T231] ==================================================================
[ 17.878220][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.878548][ T231] Read of size 1 at addr ffff888005fa468c by task packetdrill/231
[ 17.878910][ T231]
[ 17.879002][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.879010][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.879012][ T231] Call Trace:
[ 17.879014][ T231]
[ 17.879016][ T231] dump_stack_lvl+0x82/0xc0
[ 17.879025][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 17.879032][ T231] ? kobject_put+0xbb/0xd0
[ 17.879037][ T231] print_report+0xb4/0x270
[ 17.879040][ T231] ? kobject_put+0xbb/0xd0
[ 17.879044][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 17.879048][ T231] ? kobject_put+0xbb/0xd0
[ 17.879052][ T231] kasan_report+0xca/0x100
[ 17.879059][ T231] ? kobject_put+0xbb/0xd0
[ 17.879069][ T231] kobject_put+0xbb/0xd0
[ 17.879075][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.879081][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.879087][ T231] ? netif_state_change+0x228/0x2c0
[ 17.879092][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.879096][ T231] ? generic_xdp_install+0x410/0x410
[ 17.879104][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.879114][ T231] tun_chr_close+0xc0/0x1c0
[ 17.879120][ T231] __fput+0x35c/0xa70
[ 17.879131][ T231] fput_close_sync+0xdd/0x1b0
[ 17.879137][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.879146][ T231] __x64_sys_close+0x7d/0xd0
[ 17.879152][ T231] do_syscall_64+0xc1/0xfd0
[ 17.879159][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.879165][ T231] RIP: 0033:0x4901eb
[ 17.879175][ 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
[ 17.879180][ T231] RSP: 002b:00007fff30dca7f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.879186][ T231] RAX: ffffffffffffffda RBX: 00007fff30dcad50 RCX: 00000000004901eb
[ 17.879189][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.879190][ T231] RBP: 00007fff30dca830 R08: 0000000000000000 R09: 0000000000000000
[ 17.879192][ T231] R10: 0000000000000007 R11: 0000000000000293 R12: 00007fff30dcacc8
[ 17.879194][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.879200][ T231]
[ 17.879201][ T231]
[ 17.886698][ T231] The buggy address belongs to the physical page:
[ 17.886890][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005fa5000 pfn:0x5fa4
[ 17.887208][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 17.887378][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 17.887666][ T231] raw: ffff888005fa5000 0000000000000000 00000001ffffffff 0000000000000000
[ 17.887939][ T231] page dumped because: kasan: bad access detected
[ 17.888132][ T231]
[ 17.888211][ T231] Memory state around the buggy address:
[ 17.888373][ T231] ffff888005fa4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.888607][ T231] ffff888005fa4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.888830][ T231] >ffff888005fa4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.889054][ T231] ^
[ 17.889167][ T231] ffff888005fa4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.889400][ T231] ffff888005fa4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.889640][ T231] ==================================================================
[ 17.890111][ T231] Disabling lock debugging due to kernel taint
[ 17.890311][ T231] ------------[ cut here ]------------
[ 17.890558][ T231] refcount_t: underflow; use-after-free.
[ 17.890753][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.891073][ T231] Modules linked in:
[ 17.891197][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.891560][ T231] Tainted: [B]=BAD_PAGE
[ 17.891676][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.891867][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.892069][ 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 45 8b 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
[ 17.892615][ T231] RSP: 0018:ffffc90000a47ce8 EFLAGS: 00010282
[ 17.892810][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.893045][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.893269][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff17be134
[ 17.893514][ T231] R10: 0000000000000003 R11: ffffc90000a47880 R12: 0000000000000001
[ 17.893739][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.893968][ T231] FS: 00000000223423c0(0000) GS:ffff8880a901a000(0000) knlGS:0000000000000000
[ 17.894233][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.894483][ T231] CR2: 00007f05ef489000 CR3: 0000000009a0f002 CR4: 0000000000772ef0
[ 17.894711][ T231] PKRU: 55555554
[ 17.894831][ T231] Call Trace:
[ 17.894944][ T231]
[ 17.895022][ T231] netdev_run_todo+0x5f0/0xc60
[ 17.895181][ T231] ? rtnl_is_locked+0x15/0x20
[ 17.895341][ T231] ? netif_state_change+0x228/0x2c0
[ 17.895501][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.895687][ T231] ? generic_xdp_install+0x410/0x410
[ 17.895840][ T231] ? tun_chr_close+0xae/0x1c0
[ 17.895993][ T231] tun_chr_close+0xc0/0x1c0
[ 17.896147][ T231] __fput+0x35c/0xa70
[ 17.896266][ T231] fput_close_sync+0xdd/0x1b0
[ 17.896430][ T231] ? alloc_file_clone+0xf0/0xf0
[ 17.896588][ T231] __x64_sys_close+0x7d/0xd0
[ 17.896737][ T231] do_syscall_64+0xc1/0xfd0
[ 17.896891][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.897081][ T231] RIP: 0033:0x4901eb
[ 17.897201][ 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
[ 17.897760][ T231] RSP: 002b:00007fff30dca7f0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.898027][ T231] RAX: ffffffffffffffda RBX: 00007fff30dcad50 RCX: 00000000004901eb
[ 17.898255][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.898505][ T231] RBP: 00007fff30dca830 R08: 0000000000000000 R09: 0000000000000000
[ 17.898729][ T231] R10: 0000000000000007 R11: 0000000000000293 R12: 00007fff30dcacc8
[ 17.898956][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.899190][ T231]
[ 17.899323][ T231] irq event stamp: 1174963
[ 17.899492][ T231] hardirqs last enabled at (1174963): [] irqentry_exit+0x3b/0x80
[ 17.899769][ T231] hardirqs last disabled at (1174962): [] handle_softirqs+0x47f/0x610
[ 17.900049][ T231] softirqs last enabled at (1174390): [] handle_softirqs+0x352/0x610
[ 17.900321][ T231] softirqs last disabled at (1174383): [] irq_exit_rcu+0xab/0x100
[ 17.900599][ T231] ---[ end trace 0000000000000000 ]---