[ 16.319513][ T233] ==================================================================
[ 16.319950][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.320286][ T233] Read of size 1 at addr ffff888008fa068c by task packetdrill/233
[ 16.320676][ T233]
[ 16.320824][ T233] CPU: 3 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.320832][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.320835][ T233] Call Trace:
[ 16.320839][ T233]
[ 16.320842][ T233] dump_stack_lvl+0x82/0xc0
[ 16.320851][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 16.320862][ T233] ? kobject_put+0xbb/0xd0
[ 16.320868][ T233] print_report+0xb4/0x270
[ 16.320874][ T233] ? kobject_put+0xbb/0xd0
[ 16.320878][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 16.320885][ T233] ? kobject_put+0xbb/0xd0
[ 16.320890][ T233] kasan_report+0xca/0x100
[ 16.320897][ T233] ? kobject_put+0xbb/0xd0
[ 16.320906][ T233] kobject_put+0xbb/0xd0
[ 16.320912][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.320919][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.320922][ T233] ? netif_state_change+0x228/0x2c0
[ 16.320925][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.320928][ T233] ? generic_xdp_install+0x410/0x410
[ 16.320932][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.320940][ T233] tun_chr_close+0xc0/0x1c0
[ 16.320943][ T233] __fput+0x35c/0xa70
[ 16.320951][ T233] fput_close_sync+0xdd/0x1b0
[ 16.320955][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.320960][ T233] __x64_sys_close+0x7d/0xd0
[ 16.320963][ T233] do_syscall_64+0xc1/0xfd0
[ 16.320970][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.320975][ T233] RIP: 0033:0x4901eb
[ 16.320980][ 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
[ 16.320983][ T233] RSP: 002b:00007ffe193ecad0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.320987][ T233] RAX: ffffffffffffffda RBX: 00007ffe193ed030 RCX: 00000000004901eb
[ 16.320990][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.320991][ T233] RBP: 00007ffe193ecb10 R08: 0000000000000000 R09: 0000000000000000
[ 16.320993][ T233] R10: 0000000025ea4090 R11: 0000000000000293 R12: 00007ffe193ecfa8
[ 16.320995][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.321002][ T233]
[ 16.321003][ T233]
[ 16.332417][ T233] The buggy address belongs to the physical page:
[ 16.332774][ T233] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008fa0970 pfn:0x8fa0
[ 16.333359][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 16.333664][ T233] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.334193][ T233] raw: ffff888008fa0970 0000000000000000 00000001ffffffff 0000000000000000
[ 16.334698][ T233] page dumped because: kasan: bad access detected
[ 16.335052][ T233]
[ 16.335192][ T233] Memory state around the buggy address:
[ 16.335462][ T233] ffff888008fa0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.335869][ T233] ffff888008fa0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.336280][ T233] >ffff888008fa0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.336688][ T233] ^
[ 16.336907][ T233] ffff888008fa0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.337316][ T233] ffff888008fa0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.337724][ T233] ==================================================================
[ 16.338155][ T233] Disabling lock debugging due to kernel taint
[ 16.338503][ T233] ------------[ cut here ]------------
[ 16.338758][ T233] refcount_t: underflow; use-after-free.
[ 16.339066][ T233] WARNING: CPU: 3 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.339568][ T233] Modules linked in:
[ 16.339793][ T233] CPU: 3 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.340431][ T233] Tainted: [B]=BAD_PAGE
[ 16.340645][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.340997][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.341372][ 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 85 b9 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
[ 16.342367][ T233] RSP: 0018:ffffc90000757ce8 EFLAGS: 00010282
[ 16.342726][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.343145][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.343577][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff743e134
[ 16.344004][ T233] R10: 0000000000000003 R11: ffffc90000757880 R12: 0000000000000001
[ 16.344431][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.345003][ T233] FS: 0000000025e9d3c0(0000) GS:ffff88807ad9a000(0000) knlGS:0000000000000000
[ 16.345476][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.345974][ T233] CR2: 00007f681b16c000 CR3: 000000000ca15002 CR4: 0000000000772ef0
[ 16.346383][ T233] PKRU: 55555554
[ 16.346594][ T233] Call Trace:
[ 16.346804][ T233]
[ 16.346947][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.347404][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.347683][ T233] ? netif_state_change+0x228/0x2c0
[ 16.347966][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.348492][ T233] ? generic_xdp_install+0x410/0x410
[ 16.348744][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.349024][ T233] tun_chr_close+0xc0/0x1c0
[ 16.349317][ T233] __fput+0x35c/0xa70
[ 16.349533][ T233] fput_close_sync+0xdd/0x1b0
[ 16.349930][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.350231][ T233] __x64_sys_close+0x7d/0xd0
[ 16.350521][ T233] do_syscall_64+0xc1/0xfd0
[ 16.350808][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.351276][ T233] RIP: 0033:0x4901eb
[ 16.351502][ 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
[ 16.352633][ T233] RSP: 002b:00007ffe193ecad0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.353042][ T233] RAX: ffffffffffffffda RBX: 00007ffe193ed030 RCX: 00000000004901eb
[ 16.353619][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.354003][ T233] RBP: 00007ffe193ecb10 R08: 0000000000000000 R09: 0000000000000000
[ 16.354400][ T233] R10: 0000000025ea4090 R11: 0000000000000293 R12: 00007ffe193ecfa8
[ 16.354907][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.355309][ T233]
[ 16.355516][ T233] irq event stamp: 1857367
[ 16.355778][ T233] hardirqs last enabled at (1857367): [] irqentry_exit+0x3b/0x80
[ 16.356394][ T233] hardirqs last disabled at (1857366): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 16.356903][ T233] softirqs last enabled at (1857184): [] __tun_set_ebpf+0xc6/0x180
[ 16.357517][ T233] softirqs last disabled at (1857182): [] __tun_set_ebpf+0x91/0x180
[ 16.357964][ T233] ---[ end trace 0000000000000000 ]---