[ 21.836710][ T233] ==================================================================
[ 21.837160][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 21.837443][ T233] Read of size 1 at addr ffff888004e0868c by task packetdrill/233
[ 21.837726][ T233]
[ 21.837827][ T233] CPU: 1 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.837832][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.837838][ T233] Call Trace:
[ 21.837840][ T233]
[ 21.837842][ T233] dump_stack_lvl+0x82/0xc0
[ 21.837852][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 21.837860][ T233] ? kobject_put+0xbb/0xd0
[ 21.837866][ T233] print_report+0xb4/0x270
[ 21.837871][ T233] ? kobject_put+0xbb/0xd0
[ 21.837875][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 21.837880][ T233] ? kobject_put+0xbb/0xd0
[ 21.837885][ T233] kasan_report+0xca/0x100
[ 21.837889][ T233] ? kobject_put+0xbb/0xd0
[ 21.837895][ T233] kobject_put+0xbb/0xd0
[ 21.837898][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.837905][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.837909][ T233] ? netif_state_change+0x228/0x2c0
[ 21.837912][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.837915][ T233] ? generic_xdp_install+0x410/0x410
[ 21.837919][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.837927][ T233] tun_chr_close+0xc0/0x1c0
[ 21.837930][ T233] __fput+0x35c/0xa70
[ 21.837939][ T233] fput_close_sync+0xdd/0x1b0
[ 21.837942][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.837947][ T233] __x64_sys_close+0x7d/0xd0
[ 21.837951][ T233] do_syscall_64+0xc1/0xfd0
[ 21.837957][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.837963][ T233] RIP: 0033:0x4901eb
[ 21.837968][ T233] 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
[ 21.837972][ T233] RSP: 002b:00007ffdb9a547d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.837976][ T233] RAX: ffffffffffffffda RBX: 00007ffdb9a54d30 RCX: 00000000004901eb
[ 21.837979][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.837981][ T233] RBP: 00007ffdb9a54810 R08: 0000000000000000 R09: 0000000000000000
[ 21.837983][ T233] R10: 00000000237e1570 R11: 0000000000000293 R12: 00007ffdb9a54ca8
[ 21.837985][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.837991][ T233]
[ 21.837992][ T233]
[ 21.846426][ T233] The buggy address belongs to the physical page:
[ 21.846675][ T233] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888004e09f00 pfn:0x4e08
[ 21.847089][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 21.847279][ T233] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 21.847681][ T233] raw: ffff888004e09f00 0000000000000000 00000001ffffffff 0000000000000000
[ 21.848008][ T233] page dumped because: kasan: bad access detected
[ 21.848253][ T233]
[ 21.848357][ T233] Memory state around the buggy address:
[ 21.848546][ T233] ffff888004e08580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.848844][ T233] ffff888004e08600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.849139][ T233] >ffff888004e08680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.849411][ T233] ^
[ 21.849553][ T233] ffff888004e08700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.849822][ T233] ffff888004e08780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.850108][ T233] ==================================================================
[ 21.850636][ T233] Disabling lock debugging due to kernel taint
[ 21.850874][ T233] ------------[ cut here ]------------
[ 21.851092][ T233] refcount_t: underflow; use-after-free.
[ 21.851309][ T233] WARNING: CPU: 1 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.851671][ T233] Modules linked in:
[ 21.851840][ T233] CPU: 1 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.852327][ T233] Tainted: [B]=BAD_PAGE
[ 21.852490][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.852739][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.852983][ T233] 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 9f 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
[ 21.853688][ T233] RSP: 0018:ffffc90000ad7ce8 EFLAGS: 00010282
[ 21.853935][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.854210][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.854570][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff3fbe134
[ 21.854845][ T233] R10: 0000000000000003 R11: ffffc90000ad7880 R12: 0000000000000001
[ 21.855154][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.855418][ T233] FS: 00000000237da3c0(0000) GS:ffff88808f49a000(0000) knlGS:0000000000000000
[ 21.855739][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.855971][ T233] CR2: 00007f66519f9000 CR3: 000000000c66e002 CR4: 0000000000772ef0
[ 21.856252][ T233] PKRU: 55555554
[ 21.856424][ T233] Call Trace:
[ 21.856557][ T233]
[ 21.856648][ T233] netdev_run_todo+0x5f0/0xc60
[ 21.856865][ T233] ? rtnl_is_locked+0x15/0x20
[ 21.857057][ T233] ? netif_state_change+0x228/0x2c0
[ 21.857232][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.857468][ T233] ? generic_xdp_install+0x410/0x410
[ 21.857649][ T233] ? tun_chr_close+0xae/0x1c0
[ 21.857835][ T233] tun_chr_close+0xc0/0x1c0
[ 21.858017][ T233] __fput+0x35c/0xa70
[ 21.858173][ T233] fput_close_sync+0xdd/0x1b0
[ 21.858352][ T233] ? alloc_file_clone+0xf0/0xf0
[ 21.858569][ T233] __x64_sys_close+0x7d/0xd0
[ 21.858755][ T233] do_syscall_64+0xc1/0xfd0
[ 21.858961][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.859196][ T233] RIP: 0033:0x4901eb
[ 21.859348][ T233] 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
[ 21.860009][ T233] RSP: 002b:00007ffdb9a547d0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.860304][ T233] RAX: ffffffffffffffda RBX: 00007ffdb9a54d30 RCX: 00000000004901eb
[ 21.860619][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.860937][ T233] RBP: 00007ffdb9a54810 R08: 0000000000000000 R09: 0000000000000000
[ 21.861227][ T233] R10: 00000000237e1570 R11: 0000000000000293 R12: 00007ffdb9a54ca8
[ 21.861531][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.861817][ T233]
[ 21.862000][ T233] irq event stamp: 1301355
[ 21.862187][ T233] hardirqs last enabled at (1301355): [] irqentry_exit+0x3b/0x80
[ 21.862515][ T233] hardirqs last disabled at (1301354): [] handle_softirqs+0x47f/0x610
[ 21.862853][ T233] softirqs last enabled at (1301018): [] handle_softirqs+0x352/0x610
[ 21.863192][ T233] softirqs last disabled at (1301011): [] irq_exit_rcu+0xab/0x100
[ 21.863505][ T233] ---[ end trace 0000000000000000 ]---
[ 21.869101][ T233] packetdrill (233) used greatest stack depth: 24320 bytes left