[ 16.604348][ T232] ==================================================================
[ 16.604743][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.604961][ T232] Read of size 1 at addr ffff888004d5c68c by task packetdrill/232
[ 16.605212][ T232]
[ 16.605306][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.605311][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.605314][ T232] Call Trace:
[ 16.605316][ T232]
[ 16.605318][ T232] dump_stack_lvl+0x82/0xc0
[ 16.605324][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 16.605332][ T232] ? kobject_put+0xbb/0xd0
[ 16.605336][ T232] print_report+0xb4/0x270
[ 16.605340][ T232] ? kobject_put+0xbb/0xd0
[ 16.605343][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 16.605347][ T232] ? kobject_put+0xbb/0xd0
[ 16.605350][ T232] kasan_report+0xca/0x100
[ 16.605354][ T232] ? kobject_put+0xbb/0xd0
[ 16.605359][ T232] kobject_put+0xbb/0xd0
[ 16.605363][ T232] netdev_run_todo+0x5f0/0xc60
[ 16.605369][ T232] ? rtnl_is_locked+0x15/0x20
[ 16.605373][ T232] ? netif_state_change+0x228/0x2c0
[ 16.605376][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.605379][ T232] ? generic_xdp_install+0x410/0x410
[ 16.605383][ T232] ? tun_chr_close+0xae/0x1c0
[ 16.605391][ T232] tun_chr_close+0xc0/0x1c0
[ 16.605394][ T232] __fput+0x35c/0xa70
[ 16.605403][ T232] fput_close_sync+0xdd/0x1b0
[ 16.605407][ T232] ? alloc_file_clone+0xf0/0xf0
[ 16.605411][ T232] __x64_sys_close+0x7d/0xd0
[ 16.605415][ T232] do_syscall_64+0xc1/0xfd0
[ 16.605421][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.605426][ T232] RIP: 0033:0x4901eb
[ 16.605430][ 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
[ 16.605433][ T232] RSP: 002b:00007fff94589590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.605437][ T232] RAX: ffffffffffffffda RBX: 00007fff94589af0 RCX: 00000000004901eb
[ 16.605439][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.605441][ T232] RBP: 00007fff945895d0 R08: 0000000000000000 R09: 0000000000000000
[ 16.605443][ T232] R10: 0000000000000004 R11: 0000000000000293 R12: 00007fff94589a68
[ 16.605445][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.605451][ T232]
[ 16.605452][ T232]
[ 16.612371][ T232] The buggy address belongs to the physical page:
[ 16.612592][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888004d5f840 pfn:0x4d5c
[ 16.612942][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 16.613120][ T232] raw: 0080000000000000 ffffea0000128b08 ffff88803063bc40 0000000000000000
[ 16.613422][ T232] raw: ffff888004d5f840 0000000000000000 00000000ffffffff 0000000000000000
[ 16.613724][ T232] page dumped because: kasan: bad access detected
[ 16.613932][ T232]
[ 16.614017][ T232] Memory state around the buggy address:
[ 16.614178][ T232] ffff888004d5c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.614423][ T232] ffff888004d5c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.614672][ T232] >ffff888004d5c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.614916][ T232] ^
[ 16.615044][ T232] ffff888004d5c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.615290][ T232] ffff888004d5c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.615531][ T232] ==================================================================
[ 16.615935][ T232] Disabling lock debugging due to kernel taint
[ 16.616149][ T232] ------------[ cut here ]------------
[ 16.616314][ T232] refcount_t: underflow; use-after-free.
[ 16.616512][ T232] WARNING: CPU: 0 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.616810][ T232] Modules linked in:
[ 16.616947][ T232] CPU: 0 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.617334][ T232] Tainted: [B]=BAD_PAGE
[ 16.617460][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.617675][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.617890][ 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 85 8e 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
[ 16.618482][ T232] RSP: 0018:ffffc90000797ce8 EFLAGS: 00010282
[ 16.618701][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.618948][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.619195][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1e3e134
[ 16.619447][ T232] R10: 0000000000000003 R11: ffffc90000797880 R12: 0000000000000001
[ 16.619706][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.619958][ T232] FS: 000000003a99b3c0(0000) GS:ffff8880a001a000(0000) knlGS:0000000000000000
[ 16.620244][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.620461][ T232] CR2: 00007f8c62bdc1b4 CR3: 000000000a69e003 CR4: 0000000000772ef0
[ 16.620715][ T232] PKRU: 55555554
[ 16.620843][ T232] Call Trace:
[ 16.620970][ T232]
[ 16.621056][ T232] netdev_run_todo+0x5f0/0xc60
[ 16.621226][ T232] ? rtnl_is_locked+0x15/0x20
[ 16.621406][ T232] ? netif_state_change+0x228/0x2c0
[ 16.621583][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.621788][ T232] ? generic_xdp_install+0x410/0x410
[ 16.621952][ T232] ? tun_chr_close+0xae/0x1c0
[ 16.622120][ T232] tun_chr_close+0xc0/0x1c0
[ 16.622293][ T232] __fput+0x35c/0xa70
[ 16.622422][ T232] fput_close_sync+0xdd/0x1b0
[ 16.622596][ T232] ? alloc_file_clone+0xf0/0xf0
[ 16.622764][ T232] __x64_sys_close+0x7d/0xd0
[ 16.622928][ T232] do_syscall_64+0xc1/0xfd0
[ 16.623092][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.623299][ T232] RIP: 0033:0x4901eb
[ 16.623431][ 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
[ 16.624021][ T232] RSP: 002b:00007fff94589590 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.624277][ T232] RAX: ffffffffffffffda RBX: 00007fff94589af0 RCX: 00000000004901eb
[ 16.624524][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.624777][ T232] RBP: 00007fff945895d0 R08: 0000000000000000 R09: 0000000000000000
[ 16.625026][ T232] R10: 0000000000000004 R11: 0000000000000293 R12: 00007fff94589a68
[ 16.625274][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.625523][ T232]
[ 16.625657][ T232] irq event stamp: 2010285
[ 16.625820][ T232] hardirqs last enabled at (2010285): [] irqentry_exit+0x3b/0x80
[ 16.626117][ T232] hardirqs last disabled at (2010284): [] handle_softirqs+0x47f/0x610
[ 16.626411][ T232] softirqs last enabled at (2009940): [] handle_softirqs+0x352/0x610
[ 16.626703][ T232] softirqs last disabled at (2009933): [] irq_exit_rcu+0xab/0x100
[ 16.627076][ T232] ---[ end trace 0000000000000000 ]---