[ 17.739658][ T232] ==================================================================
[ 17.740051][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 17.740309][ T232] Read of size 1 at addr ffff8880092c468c by task packetdrill/232
[ 17.740722][ T232]
[ 17.740869][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.740876][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.740879][ T232] Call Trace:
[ 17.740882][ T232]
[ 17.740884][ T232] dump_stack_lvl+0x82/0xc0
[ 17.740894][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 17.740904][ T232] ? kobject_put+0xbb/0xd0
[ 17.740910][ T232] print_report+0xb4/0x270
[ 17.740916][ T232] ? kobject_put+0xbb/0xd0
[ 17.740921][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 17.740927][ T232] ? kobject_put+0xbb/0xd0
[ 17.740932][ T232] kasan_report+0xca/0x100
[ 17.740938][ T232] ? kobject_put+0xbb/0xd0
[ 17.740948][ T232] kobject_put+0xbb/0xd0
[ 17.740954][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.740961][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.740966][ T232] ? netif_state_change+0x228/0x2c0
[ 17.740971][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.740975][ T232] ? generic_xdp_install+0x410/0x410
[ 17.740983][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.740994][ T232] tun_chr_close+0xc0/0x1c0
[ 17.741000][ T232] __fput+0x35c/0xa70
[ 17.741012][ T232] fput_close_sync+0xdd/0x1b0
[ 17.741018][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.741027][ T232] __x64_sys_close+0x7d/0xd0
[ 17.741033][ T232] do_syscall_64+0xc1/0xfd0
[ 17.741042][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.741048][ T232] RIP: 0033:0x4901eb
[ 17.741054][ 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
[ 17.741059][ T232] RSP: 002b:00007ffe78ba1700 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.741065][ T232] RAX: ffffffffffffffda RBX: 00007ffe78ba1c60 RCX: 00000000004901eb
[ 17.741069][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.741072][ T232] RBP: 00007ffe78ba1740 R08: 0000000000000000 R09: 0000000000000000
[ 17.741075][ T232] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffe78ba1bd8
[ 17.741078][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.741090][ T232]
[ 17.741092][ T232]
[ 17.749442][ T232] The buggy address belongs to the physical page:
[ 17.749695][ T232] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880092c6800 pfn:0x92c4
[ 17.750084][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 17.750278][ T232] raw: 0080000000000000 ffffea0000315908 ffff8880363bbc40 0000000000000000
[ 17.750622][ T232] raw: ffff8880092c6800 0000000000000000 00000000ffffffff 0000000000000000
[ 17.750970][ T232] page dumped because: kasan: bad access detected
[ 17.751297][ T232]
[ 17.751408][ T232] Memory state around the buggy address:
[ 17.751620][ T232] ffff8880092c4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.751938][ T232] ffff8880092c4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.752257][ T232] >ffff8880092c4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.752579][ T232] ^
[ 17.752737][ T232] ffff8880092c4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.753014][ T232] ffff8880092c4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 17.753336][ T232] ==================================================================
[ 17.753686][ T232] Disabling lock debugging due to kernel taint
[ 17.753934][ T232] ------------[ cut here ]------------
[ 17.754396][ T232] refcount_t: underflow; use-after-free.
[ 17.754718][ T232] WARNING: CPU: 3 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 17.755120][ T232] Modules linked in:
[ 17.755268][ T232] CPU: 3 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 17.755689][ T232] Tainted: [B]=BAD_PAGE
[ 17.755832][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 17.756081][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 17.756324][ 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 a5 a8 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
[ 17.756965][ T232] RSP: 0018:ffffc90000aa7ce8 EFLAGS: 00010282
[ 17.757209][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 17.757486][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 17.757763][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff527e134
[ 17.758041][ T232] R10: 0000000000000003 R11: ffffc90000aa7880 R12: 0000000000000001
[ 17.758322][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 17.758595][ T232] FS: 0000000009cc83c0(0000) GS:ffff88808bb9a000(0000) knlGS:0000000000000000
[ 17.758914][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 17.759153][ T232] CR2: 00007f189e8f8000 CR3: 000000000c61f004 CR4: 0000000000772ef0
[ 17.759449][ T232] PKRU: 55555554
[ 17.759591][ T232] Call Trace:
[ 17.759730][ T232]
[ 17.759826][ T232] netdev_run_todo+0x5f0/0xc60
[ 17.760022][ T232] ? rtnl_is_locked+0x15/0x20
[ 17.760206][ T232] ? netif_state_change+0x228/0x2c0
[ 17.760394][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 17.760620][ T232] ? generic_xdp_install+0x410/0x410
[ 17.760803][ T232] ? tun_chr_close+0xae/0x1c0
[ 17.760998][ T232] tun_chr_close+0xc0/0x1c0
[ 17.761182][ T232] __fput+0x35c/0xa70
[ 17.761334][ T232] fput_close_sync+0xdd/0x1b0
[ 17.761521][ T232] ? alloc_file_clone+0xf0/0xf0
[ 17.761702][ T232] __x64_sys_close+0x7d/0xd0
[ 17.761878][ T232] do_syscall_64+0xc1/0xfd0
[ 17.762070][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 17.762298][ T232] RIP: 0033:0x4901eb
[ 17.762509][ 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
[ 17.763206][ T232] RSP: 002b:00007ffe78ba1700 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 17.763524][ T232] RAX: ffffffffffffffda RBX: 00007ffe78ba1c60 RCX: 00000000004901eb
[ 17.763844][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 17.764165][ T232] RBP: 00007ffe78ba1740 R08: 0000000000000000 R09: 0000000000000000
[ 17.764558][ T232] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffe78ba1bd8
[ 17.764937][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 17.765260][ T232]
[ 17.765406][ T232] irq event stamp: 1159359
[ 17.765630][ T232] hardirqs last enabled at (1159359): [] irqentry_exit+0x3b/0x80
[ 17.765951][ T232] hardirqs last disabled at (1159358): [] handle_softirqs+0x47f/0x610
[ 17.766275][ T232] softirqs last enabled at (1159170): [] __tun_set_ebpf+0xc6/0x180
[ 17.766613][ T232] softirqs last disabled at (1159168): [] __tun_set_ebpf+0x91/0x180
[ 17.766998][ T232] ---[ end trace 0000000000000000 ]---