[ 18.998802][ T231] ==================================================================
[ 18.999201][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 18.999426][ T231] Read of size 1 at addr ffff88800bd0868c by task packetdrill/231
[ 18.999710][ T231]
[ 18.999803][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.999809][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.999812][ T231] Call Trace:
[ 18.999818][ T231]
[ 18.999820][ T231] dump_stack_lvl+0x82/0xc0
[ 18.999829][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 18.999840][ T231] ? kobject_put+0xbb/0xd0
[ 18.999845][ T231] print_report+0xb4/0x270
[ 18.999850][ T231] ? kobject_put+0xbb/0xd0
[ 18.999854][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 18.999858][ T231] ? kobject_put+0xbb/0xd0
[ 18.999861][ T231] kasan_report+0xca/0x100
[ 18.999865][ T231] ? kobject_put+0xbb/0xd0
[ 18.999871][ T231] kobject_put+0xbb/0xd0
[ 18.999875][ T231] netdev_run_todo+0x5f0/0xc60
[ 18.999881][ T231] ? rtnl_is_locked+0x15/0x20
[ 18.999885][ T231] ? netif_state_change+0x228/0x2c0
[ 18.999888][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.999892][ T231] ? generic_xdp_install+0x410/0x410
[ 18.999899][ T231] ? tun_chr_close+0xae/0x1c0
[ 18.999911][ T231] tun_chr_close+0xc0/0x1c0
[ 18.999917][ T231] __fput+0x35c/0xa70
[ 18.999925][ T231] fput_close_sync+0xdd/0x1b0
[ 18.999928][ T231] ? alloc_file_clone+0xf0/0xf0
[ 18.999933][ T231] __x64_sys_close+0x7d/0xd0
[ 18.999937][ T231] do_syscall_64+0xc1/0xfd0
[ 18.999944][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.999949][ T231] RIP: 0033:0x4901eb
[ 18.999954][ 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
[ 18.999957][ T231] RSP: 002b:00007ffd4a258a90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.999962][ T231] RAX: ffffffffffffffda RBX: 00007ffd4a258ff0 RCX: 00000000004901eb
[ 18.999965][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.999967][ T231] RBP: 00007ffd4a258ad0 R08: 0000000000000000 R09: 0000000000000000
[ 18.999969][ T231] R10: 00000000238afba0 R11: 0000000000000293 R12: 00007ffd4a258f68
[ 18.999971][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.999977][ T231]
[ 18.999978][ T231]
[ 19.007073][ T231] The buggy address belongs to the physical page:
[ 19.007276][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bd0c000 pfn:0xbd08
[ 19.007621][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 19.007791][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 19.008103][ T231] raw: ffff88800bd0c000 0000000000000000 00000001ffffffff 0000000000000000
[ 19.008376][ T231] page dumped because: kasan: bad access detected
[ 19.008603][ T231]
[ 19.008682][ T231] Memory state around the buggy address:
[ 19.008846][ T231] ffff88800bd08580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.009084][ T231] ffff88800bd08600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.009309][ T231] >ffff88800bd08680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.009542][ T231] ^
[ 19.009672][ T231] ffff88800bd08700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.009923][ T231] ffff88800bd08780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 19.010143][ T231] ==================================================================
[ 19.010550][ T231] Disabling lock debugging due to kernel taint
[ 19.010801][ T231] ------------[ cut here ]------------
[ 19.010997][ T231] refcount_t: underflow; use-after-free.
[ 19.011199][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 19.011522][ T231] Modules linked in:
[ 19.011690][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 19.012096][ T231] Tainted: [B]=BAD_PAGE
[ 19.012250][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 19.012523][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 19.012780][ 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 a5 b8 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
[ 19.013392][ T231] RSP: 0018:ffffc900009e7ce8 EFLAGS: 00010282
[ 19.013671][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 19.013971][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 19.014255][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff727e134
[ 19.014523][ T231] R10: 0000000000000003 R11: ffffc900009e7880 R12: 0000000000000001
[ 19.014818][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 19.015107][ T231] FS: 00000000238903c0(0000) GS:ffff888075f1a000(0000) knlGS:0000000000000000
[ 19.015428][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 19.015674][ T231] CR2: 00007f199d105000 CR3: 000000000bc68006 CR4: 0000000000772ef0
[ 19.015980][ T231] PKRU: 55555554
[ 19.016141][ T231] Call Trace:
[ 19.016285][ T231]
[ 19.016394][ T231] netdev_run_todo+0x5f0/0xc60
[ 19.016614][ T231] ? rtnl_is_locked+0x15/0x20
[ 19.016814][ T231] ? netif_state_change+0x228/0x2c0
[ 19.017039][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 19.017269][ T231] ? generic_xdp_install+0x410/0x410
[ 19.017458][ T231] ? tun_chr_close+0xae/0x1c0
[ 19.017661][ T231] tun_chr_close+0xc0/0x1c0
[ 19.017860][ T231] __fput+0x35c/0xa70
[ 19.018018][ T231] fput_close_sync+0xdd/0x1b0
[ 19.018205][ T231] ? alloc_file_clone+0xf0/0xf0
[ 19.018381][ T231] __x64_sys_close+0x7d/0xd0
[ 19.018584][ T231] do_syscall_64+0xc1/0xfd0
[ 19.018769][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 19.019022][ T231] RIP: 0033:0x4901eb
[ 19.019186][ 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
[ 19.019791][ T231] RSP: 002b:00007ffd4a258a90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 19.020072][ T231] RAX: ffffffffffffffda RBX: 00007ffd4a258ff0 RCX: 00000000004901eb
[ 19.020344][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 19.020653][ T231] RBP: 00007ffd4a258ad0 R08: 0000000000000000 R09: 0000000000000000
[ 19.020944][ T231] R10: 00000000238afba0 R11: 0000000000000293 R12: 00007ffd4a258f68
[ 19.021228][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 19.021525][ T231]
[ 19.021709][ T231] irq event stamp: 1953099
[ 19.021915][ T231] hardirqs last enabled at (1953099): [] irqentry_exit+0x3b/0x80
[ 19.022243][ T231] hardirqs last disabled at (1953098): [] handle_softirqs+0x47f/0x610
[ 19.022568][ T231] softirqs last enabled at (1952922): [] handle_softirqs+0x352/0x610
[ 19.022932][ T231] softirqs last disabled at (1952915): [] irq_exit_rcu+0xab/0x100
[ 19.023245][ T231] ---[ end trace 0000000000000000 ]---