[ 21.050588][ T231] ==================================================================
[ 21.051092][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 21.051499][ T231] Read of size 1 at addr ffff888005f3c68c by task packetdrill/231
[ 21.051909][ T231]
[ 21.052061][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.052069][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.052073][ T231] Call Trace:
[ 21.052076][ T231]
[ 21.052080][ T231] dump_stack_lvl+0x82/0xc0
[ 21.052091][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 21.052102][ T231] ? kobject_put+0xbb/0xd0
[ 21.052108][ T231] print_report+0xb4/0x270
[ 21.052114][ T231] ? kobject_put+0xbb/0xd0
[ 21.052119][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 21.052126][ T231] ? kobject_put+0xbb/0xd0
[ 21.052131][ T231] kasan_report+0xca/0x100
[ 21.052138][ T231] ? kobject_put+0xbb/0xd0
[ 21.052148][ T231] kobject_put+0xbb/0xd0
[ 21.052154][ T231] netdev_run_todo+0x5f0/0xc60
[ 21.052161][ T231] ? rtnl_is_locked+0x15/0x20
[ 21.052166][ T231] ? netif_state_change+0x228/0x2c0
[ 21.052172][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.052177][ T231] ? generic_xdp_install+0x410/0x410
[ 21.052185][ T231] ? tun_chr_close+0xae/0x1c0
[ 21.052197][ T231] tun_chr_close+0xc0/0x1c0
[ 21.052203][ T231] __fput+0x35c/0xa70
[ 21.052215][ T231] fput_close_sync+0xdd/0x1b0
[ 21.052221][ T231] ? alloc_file_clone+0xf0/0xf0
[ 21.052229][ T231] __x64_sys_close+0x7d/0xd0
[ 21.052235][ T231] do_syscall_64+0xc1/0xfd0
[ 21.052243][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.052248][ T231] RIP: 0033:0x4901eb
[ 21.052259][ 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
[ 21.052264][ T231] RSP: 002b:00007ffef63f9800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.052271][ T231] RAX: ffffffffffffffda RBX: 00007ffef63f9d60 RCX: 00000000004901eb
[ 21.052275][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.052277][ T231] RBP: 00007ffef63f9840 R08: 0000000000000000 R09: 0000000000000000
[ 21.052280][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffef63f9cd8
[ 21.052284][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.052296][ T231]
[ 21.052298][ T231]
[ 21.060443][ T231] The buggy address belongs to the physical page:
[ 21.060651][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005f3fd00 pfn:0x5f3c
[ 21.060975][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 21.061268][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 21.061629][ T231] raw: ffff888005f3fd00 0000000000000000 00000001ffffffff 0000000000000000
[ 21.061911][ T231] page dumped because: kasan: bad access detected
[ 21.062117][ T231]
[ 21.062217][ T231] Memory state around the buggy address:
[ 21.062374][ T231] ffff888005f3c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.062606][ T231] ffff888005f3c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.062838][ T231] >ffff888005f3c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.063076][ T231] ^
[ 21.063238][ T231] ffff888005f3c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.063465][ T231] ffff888005f3c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 21.063703][ T231] ==================================================================
[ 21.064162][ T231] Disabling lock debugging due to kernel taint
[ 21.064363][ T231] ------------[ cut here ]------------
[ 21.064505][ T231] refcount_t: underflow; use-after-free.
[ 21.064716][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 21.065007][ T231] Modules linked in:
[ 21.065153][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 21.065500][ T231] Tainted: [B]=BAD_PAGE
[ 21.065624][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 21.065820][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 21.066057][ 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 b1 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
[ 21.066888][ T231] RSP: 0018:ffffc90000ab7ce8 EFLAGS: 00010282
[ 21.067099][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 21.067372][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 21.067616][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff63be134
[ 21.067854][ T231] R10: 0000000000000003 R11: ffffc90000ab7880 R12: 0000000000000001
[ 21.068095][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 21.068384][ T231] FS: 0000000028fe63c0(0000) GS:ffff88808301a000(0000) knlGS:0000000000000000
[ 21.068679][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 21.068873][ T231] CR2: 00007f8d97d7c000 CR3: 0000000011f4a004 CR4: 0000000000772ef0
[ 21.069168][ T231] PKRU: 55555554
[ 21.069285][ T231] Call Trace:
[ 21.069414][ T231]
[ 21.069493][ T231] netdev_run_todo+0x5f0/0xc60
[ 21.069704][ T231] ? rtnl_is_locked+0x15/0x20
[ 21.069869][ T231] ? netif_state_change+0x228/0x2c0
[ 21.070043][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 21.070242][ T231] ? generic_xdp_install+0x410/0x410
[ 21.070397][ T231] ? tun_chr_close+0xae/0x1c0
[ 21.070554][ T231] tun_chr_close+0xc0/0x1c0
[ 21.070743][ T231] __fput+0x35c/0xa70
[ 21.070862][ T231] fput_close_sync+0xdd/0x1b0
[ 21.071030][ T231] ? alloc_file_clone+0xf0/0xf0
[ 21.071198][ T231] __x64_sys_close+0x7d/0xd0
[ 21.071354][ T231] do_syscall_64+0xc1/0xfd0
[ 21.071508][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 21.071739][ T231] RIP: 0033:0x4901eb
[ 21.071881][ 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
[ 21.072471][ T231] RSP: 002b:00007ffef63f9800 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 21.072714][ T231] RAX: ffffffffffffffda RBX: 00007ffef63f9d60 RCX: 00000000004901eb
[ 21.072944][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 21.073194][ T231] RBP: 00007ffef63f9840 R08: 0000000000000000 R09: 0000000000000000
[ 21.073432][ T231] R10: 0000000002000000 R11: 0000000000000293 R12: 00007ffef63f9cd8
[ 21.073671][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 21.073901][ T231]
[ 21.074034][ T231] irq event stamp: 1907615
[ 21.074212][ T231] hardirqs last enabled at (1907615): [] irqentry_exit+0x3b/0x80
[ 21.074495][ T231] hardirqs last disabled at (1907614): [] handle_softirqs+0x47f/0x610
[ 21.074856][ T231] softirqs last enabled at (1907248): [] handle_softirqs+0x352/0x610
[ 21.075142][ T231] softirqs last disabled at (1907241): [] irq_exit_rcu+0xab/0x100
[ 21.075415][ T231] ---[ end trace 0000000000000000 ]---