[ 22.450980][ T232] ==================================================================
[ 22.451491][ T232] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 22.451897][ T232] Read of size 1 at addr ffff88800bb0c68c by task packetdrill/232
[ 22.452305][ T232]
[ 22.452455][ T232] CPU: 2 UID: 0 PID: 232 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.452463][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.452471][ T232] Call Trace:
[ 22.452474][ T232]
[ 22.452477][ T232] dump_stack_lvl+0x82/0xc0
[ 22.452488][ T232] print_address_description.constprop.0+0x2c/0x3a0
[ 22.452505][ T232] ? kobject_put+0xbb/0xd0
[ 22.452511][ T232] print_report+0xb4/0x270
[ 22.452516][ T232] ? kobject_put+0xbb/0xd0
[ 22.452520][ T232] ? kasan_addr_to_slab+0x21/0x70
[ 22.452526][ T232] ? kobject_put+0xbb/0xd0
[ 22.452531][ T232] kasan_report+0xca/0x100
[ 22.452537][ T232] ? kobject_put+0xbb/0xd0
[ 22.452546][ T232] kobject_put+0xbb/0xd0
[ 22.452552][ T232] netdev_run_todo+0x5f0/0xc60
[ 22.452561][ T232] ? rtnl_is_locked+0x15/0x20
[ 22.452567][ T232] ? netif_state_change+0x228/0x2c0
[ 22.452573][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.452578][ T232] ? generic_xdp_install+0x410/0x410
[ 22.452585][ T232] ? tun_chr_close+0xae/0x1c0
[ 22.452599][ T232] tun_chr_close+0xc0/0x1c0
[ 22.452605][ T232] __fput+0x35c/0xa70
[ 22.452618][ T232] fput_close_sync+0xdd/0x1b0
[ 22.452623][ T232] ? alloc_file_clone+0xf0/0xf0
[ 22.452632][ T232] __x64_sys_close+0x7d/0xd0
[ 22.452638][ T232] do_syscall_64+0xc1/0xfd0
[ 22.452647][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.452655][ T232] RIP: 0033:0x4901eb
[ 22.452667][ 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
[ 22.452672][ T232] RSP: 002b:00007ffc8f721640 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.452681][ T232] RAX: ffffffffffffffda RBX: 00007ffc8f721ba0 RCX: 00000000004901eb
[ 22.452684][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.452687][ T232] RBP: 00007ffc8f721680 R08: 0000000000000000 R09: 0000000000000000
[ 22.452689][ T232] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffc8f721b18
[ 22.452692][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.452705][ T232]
[ 22.452707][ T232]
[ 22.463511][ T232] The buggy address belongs to the physical page:
[ 22.463864][ T232] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800bb0eb00 pfn:0xbb0c
[ 22.464414][ T232] flags: 0x80000000000000(node=0|zone=1)
[ 22.464717][ T232] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 22.465198][ T232] raw: ffff88800bb0eb00 0000000000000000 00000001ffffffff 0000000000000000
[ 22.465654][ T232] page dumped because: kasan: bad access detected
[ 22.466000][ T232]
[ 22.466139][ T232] Memory state around the buggy address:
[ 22.466404][ T232] ffff88800bb0c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.466792][ T232] ffff88800bb0c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.467194][ T232] >ffff88800bb0c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.467589][ T232] ^
[ 22.467793][ T232] ffff88800bb0c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.468187][ T232] ffff88800bb0c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.468583][ T232] ==================================================================
[ 22.469139][ T232] Disabling lock debugging due to kernel taint
[ 22.469528][ T232] ------------[ cut here ]------------
[ 22.469811][ T232] refcount_t: underflow; use-after-free.
[ 22.470161][ T232] WARNING: CPU: 2 PID: 232 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 22.470698][ T232] Modules linked in:
[ 22.470944][ T232] CPU: 2 UID: 0 PID: 232 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.471364][ T232] Tainted: [B]=BAD_PAGE
[ 22.471534][ T232] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.471827][ T232] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 22.472101][ 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 97 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
[ 22.472758][ T232] RSP: 0018:ffffc90000a97ce8 EFLAGS: 00010282
[ 22.473005][ T232] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 22.473292][ T232] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 22.473583][ T232] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff307e134
[ 22.473876][ T232] R10: 0000000000000003 R11: ffffc90000a97880 R12: 0000000000000001
[ 22.474155][ T232] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 22.474438][ T232] FS: 000000002ef023c0(0000) GS:ffff88809cb1a000(0000) knlGS:0000000000000000
[ 22.474786][ T232] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.475035][ T232] CR2: 00007f0b194e5000 CR3: 0000000004eb4003 CR4: 0000000000772ef0
[ 22.475318][ T232] PKRU: 55555554
[ 22.475535][ T232] Call Trace:
[ 22.475732][ T232]
[ 22.475850][ T232] netdev_run_todo+0x5f0/0xc60
[ 22.476054][ T232] ? rtnl_is_locked+0x15/0x20
[ 22.476251][ T232] ? netif_state_change+0x228/0x2c0
[ 22.476454][ T232] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.476709][ T232] ? generic_xdp_install+0x410/0x410
[ 22.476904][ T232] ? tun_chr_close+0xae/0x1c0
[ 22.477111][ T232] tun_chr_close+0xc0/0x1c0
[ 22.477321][ T232] __fput+0x35c/0xa70
[ 22.477487][ T232] fput_close_sync+0xdd/0x1b0
[ 22.477693][ T232] ? alloc_file_clone+0xf0/0xf0
[ 22.477891][ T232] __x64_sys_close+0x7d/0xd0
[ 22.478088][ T232] do_syscall_64+0xc1/0xfd0
[ 22.478284][ T232] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.478529][ T232] RIP: 0033:0x4901eb
[ 22.478705][ 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
[ 22.479358][ T232] RSP: 002b:00007ffc8f721640 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.479660][ T232] RAX: ffffffffffffffda RBX: 00007ffc8f721ba0 RCX: 00000000004901eb
[ 22.479951][ T232] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.480230][ T232] RBP: 00007ffc8f721680 R08: 0000000000000000 R09: 0000000000000000
[ 22.480517][ T232] R10: 0000000000000010 R11: 0000000000000293 R12: 00007ffc8f721b18
[ 22.480911][ T232] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.481252][ T232]
[ 22.481469][ T232] irq event stamp: 1997963
[ 22.481756][ T232] hardirqs last enabled at (1997963): [] irqentry_exit+0x3b/0x80
[ 22.482235][ T232] hardirqs last disabled at (1997962): [] handle_softirqs+0x47f/0x610
[ 22.482751][ T232] softirqs last enabled at (1997838): [] handle_softirqs+0x352/0x610
[ 22.483255][ T232] softirqs last disabled at (1997829): [] irq_exit_rcu+0xab/0x100
[ 22.483727][ T232] ---[ end trace 0000000000000000 ]---