[ 15.731563][ T231] ==================================================================
[ 15.731916][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 15.732137][ T231] Read of size 1 at addr ffff888008dfc68c by task packetdrill/231
[ 15.732391][ T231]
[ 15.732487][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.732493][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.732496][ T231] Call Trace:
[ 15.732499][ T231]
[ 15.732501][ T231] dump_stack_lvl+0x82/0xc0
[ 15.732508][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 15.732516][ T231] ? kobject_put+0xbb/0xd0
[ 15.732520][ T231] print_report+0xb4/0x270
[ 15.732523][ T231] ? kobject_put+0xbb/0xd0
[ 15.732527][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 15.732531][ T231] ? kobject_put+0xbb/0xd0
[ 15.732534][ T231] kasan_report+0xca/0x100
[ 15.732538][ T231] ? kobject_put+0xbb/0xd0
[ 15.732543][ T231] kobject_put+0xbb/0xd0
[ 15.732547][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.732553][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.732557][ T231] ? netif_state_change+0x228/0x2c0
[ 15.732560][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.732563][ T231] ? generic_xdp_install+0x410/0x410
[ 15.732567][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.732575][ T231] tun_chr_close+0xc0/0x1c0
[ 15.732579][ T231] __fput+0x35c/0xa70
[ 15.732587][ T231] fput_close_sync+0xdd/0x1b0
[ 15.732590][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.732595][ T231] __x64_sys_close+0x7d/0xd0
[ 15.732599][ T231] do_syscall_64+0xc1/0xfd0
[ 15.732605][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.732610][ T231] RIP: 0033:0x4901eb
[ 15.732615][ 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
[ 15.732619][ T231] RSP: 002b:00007ffd122e29e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.732623][ T231] RAX: ffffffffffffffda RBX: 00007ffd122e2f40 RCX: 00000000004901eb
[ 15.732626][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.732628][ T231] RBP: 00007ffd122e2a20 R08: 0000000000000000 R09: 0000000000000000
[ 15.732629][ T231] R10: 000000001b280250 R11: 0000000000000293 R12: 00007ffd122e2eb8
[ 15.732631][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.732638][ T231]
[ 15.732639][ T231]
[ 15.740182][ T231] The buggy address belongs to the physical page:
[ 15.740407][ T231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8dfc
[ 15.740729][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 15.740919][ T231] raw: 0080000000000000 ffffea000029bd08 ffff8880307bbc40 0000000000000000
[ 15.741241][ T231] raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000
[ 15.741555][ T231] page dumped because: kasan: bad access detected
[ 15.741799][ T231]
[ 15.741890][ T231] Memory state around the buggy address:
[ 15.742070][ T231] ffff888008dfc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.742353][ T231] ffff888008dfc600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.742629][ T231] >ffff888008dfc680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.742911][ T231] ^
[ 15.743058][ T231] ffff888008dfc700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.743329][ T231] ffff888008dfc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.743582][ T231] ==================================================================
[ 15.743848][ T231] Disabling lock debugging due to kernel taint
[ 15.744073][ T231] ------------[ cut here ]------------
[ 15.744234][ T231] refcount_t: underflow; use-after-free.
[ 15.744438][ T231] WARNING: CPU: 3 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.744746][ T231] Modules linked in:
[ 15.744889][ T231] CPU: 3 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.745287][ T231] Tainted: [B]=BAD_PAGE
[ 15.745428][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.745644][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.745881][ 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 65 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
[ 15.746516][ T231] RSP: 0018:ffffc90000b27ce8 EFLAGS: 00010282
[ 15.746740][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.747008][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.747267][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff51fe134
[ 15.747534][ T231] R10: 0000000000000003 R11: ffffc90000b27880 R12: 0000000000000001
[ 15.747818][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.748102][ T231] FS: 000000001b2783c0(0000) GS:ffff88808639a000(0000) knlGS:0000000000000000
[ 15.748419][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.748631][ T231] CR2: 00007f95747a7000 CR3: 0000000008d83005 CR4: 0000000000772ef0
[ 15.748921][ T231] PKRU: 55555554
[ 15.749066][ T231] Call Trace:
[ 15.749192][ T231]
[ 15.749296][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.749469][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.749645][ T231] ? netif_state_change+0x228/0x2c0
[ 15.749824][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.750035][ T231] ? generic_xdp_install+0x410/0x410
[ 15.750220][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.750393][ T231] tun_chr_close+0xc0/0x1c0
[ 15.750564][ T231] __fput+0x35c/0xa70
[ 15.750700][ T231] fput_close_sync+0xdd/0x1b0
[ 15.750887][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.751063][ T231] __x64_sys_close+0x7d/0xd0
[ 15.751241][ T231] do_syscall_64+0xc1/0xfd0
[ 15.751408][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.751633][ T231] RIP: 0033:0x4901eb
[ 15.751776][ 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
[ 15.752381][ T231] RSP: 002b:00007ffd122e29e0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.752648][ T231] RAX: ffffffffffffffda RBX: 00007ffd122e2f40 RCX: 00000000004901eb
[ 15.752912][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.753172][ T231] RBP: 00007ffd122e2a20 R08: 0000000000000000 R09: 0000000000000000
[ 15.753450][ T231] R10: 000000001b280250 R11: 0000000000000293 R12: 00007ffd122e2eb8
[ 15.753712][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.753980][ T231]
[ 15.754106][ T231] irq event stamp: 1943091
[ 15.754278][ T231] hardirqs last enabled at (1943091): [] irqentry_exit+0x3b/0x80
[ 15.754575][ T231] hardirqs last disabled at (1943090): [] handle_softirqs+0x47f/0x610
[ 15.754876][ T231] softirqs last enabled at (1942938): [] handle_softirqs+0x352/0x610
[ 15.755169][ T231] softirqs last disabled at (1942933): [] irq_exit_rcu+0xab/0x100
[ 15.755473][ T231] ---[ end trace 0000000000000000 ]---