[ 22.018705][ T233] ==================================================================
[ 22.019216][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 22.019589][ T233] Read of size 1 at addr ffff88800240068c by task packetdrill/233
[ 22.020029][ T233]
[ 22.020178][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.020186][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.020190][ T233] Call Trace:
[ 22.020193][ T233]
[ 22.020196][ T233] dump_stack_lvl+0x82/0xc0
[ 22.020207][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 22.020218][ T233] ? kobject_put+0xbb/0xd0
[ 22.020226][ T233] print_report+0xb4/0x270
[ 22.020232][ T233] ? kobject_put+0xbb/0xd0
[ 22.020236][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 22.020243][ T233] ? kobject_put+0xbb/0xd0
[ 22.020248][ T233] kasan_report+0xca/0x100
[ 22.020255][ T233] ? kobject_put+0xbb/0xd0
[ 22.020265][ T233] kobject_put+0xbb/0xd0
[ 22.020270][ T233] netdev_run_todo+0x5f0/0xc60
[ 22.020278][ T233] ? rtnl_is_locked+0x15/0x20
[ 22.020284][ T233] ? netif_state_change+0x228/0x2c0
[ 22.020289][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.020294][ T233] ? generic_xdp_install+0x410/0x410
[ 22.020300][ T233] ? tun_chr_close+0xae/0x1c0
[ 22.020311][ T233] tun_chr_close+0xc0/0x1c0
[ 22.020317][ T233] __fput+0x35c/0xa70
[ 22.020330][ T233] fput_close_sync+0xdd/0x1b0
[ 22.020335][ T233] ? alloc_file_clone+0xf0/0xf0
[ 22.020344][ T233] __x64_sys_close+0x7d/0xd0
[ 22.020350][ T233] do_syscall_64+0xc1/0xfd0
[ 22.020360][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.020367][ T233] RIP: 0033:0x4901eb
[ 22.020374][ 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
[ 22.020379][ T233] RSP: 002b:00007ffc36bf7f30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.020386][ T233] RAX: ffffffffffffffda RBX: 00007ffc36bf8490 RCX: 00000000004901eb
[ 22.020390][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.020393][ T233] RBP: 00007ffc36bf7f70 R08: 0000000000000000 R09: 0000000000000000
[ 22.020395][ T233] R10: 000000002af00870 R11: 0000000000000293 R12: 00007ffc36bf8408
[ 22.020398][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.020408][ T233]
[ 22.020411][ T233]
[ 22.032400][ T233] The buggy address belongs to the physical page:
[ 22.032752][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888002406940 pfn:0x2400
[ 22.033353][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 22.033679][ T233] raw: 0080000000000000 ffffea000023e708 ffff88803063bc40 0000000000000000
[ 22.034213][ T233] raw: ffff888002406940 0000000000000000 00000000ffffffff 0000000000000000
[ 22.034745][ T233] page dumped because: kasan: bad access detected
[ 22.035108][ T233]
[ 22.035250][ T233] Memory state around the buggy address:
[ 22.035532][ T233] ffff888002400580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.035960][ T233] ffff888002400600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.036396][ T233] >ffff888002400680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.036818][ T233] ^
[ 22.037041][ T233] ffff888002400700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.037459][ T233] ffff888002400780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 22.037886][ T233] ==================================================================
[ 22.038352][ T233] Disabling lock debugging due to kernel taint
[ 22.038683][ T233] ------------[ cut here ]------------
[ 22.038943][ T233] refcount_t: underflow; use-after-free.
[ 22.039513][ T233] WARNING: CPU: 0 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 22.040048][ T233] Modules linked in:
[ 22.040271][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 22.040913][ T233] Tainted: [B]=BAD_PAGE
[ 22.041153][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 22.041504][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 22.041941][ 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 25 8a 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
[ 22.042937][ T233] RSP: 0018:ffffc90000b17ce8 EFLAGS: 00010282
[ 22.043294][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 22.043705][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 22.043986][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff157e134
[ 22.044245][ T233] R10: 0000000000000003 R11: ffffc90000b17880 R12: 0000000000000001
[ 22.044562][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 22.044907][ T233] FS: 000000002aef43c0(0000) GS:ffff8880a461a000(0000) knlGS:0000000000000000
[ 22.045254][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 22.045509][ T233] CR2: 00007f5a99937000 CR3: 000000000bf7f005 CR4: 0000000000772ef0
[ 22.045814][ T233] PKRU: 55555554
[ 22.045954][ T233] Call Trace:
[ 22.046111][ T233]
[ 22.046222][ T233] netdev_run_todo+0x5f0/0xc60
[ 22.046431][ T233] ? rtnl_is_locked+0x15/0x20
[ 22.046636][ T233] ? netif_state_change+0x228/0x2c0
[ 22.046829][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 22.047076][ T233] ? generic_xdp_install+0x410/0x410
[ 22.047262][ T233] ? tun_chr_close+0xae/0x1c0
[ 22.047502][ T233] tun_chr_close+0xc0/0x1c0
[ 22.047705][ T233] __fput+0x35c/0xa70
[ 22.047855][ T233] fput_close_sync+0xdd/0x1b0
[ 22.048053][ T233] ? alloc_file_clone+0xf0/0xf0
[ 22.048247][ T233] __x64_sys_close+0x7d/0xd0
[ 22.048453][ T233] do_syscall_64+0xc1/0xfd0
[ 22.048732][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 22.048983][ T233] RIP: 0033:0x4901eb
[ 22.049137][ 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
[ 22.049841][ T233] RSP: 002b:00007ffc36bf7f30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 22.050142][ T233] RAX: ffffffffffffffda RBX: 00007ffc36bf8490 RCX: 00000000004901eb
[ 22.050439][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 22.050767][ T233] RBP: 00007ffc36bf7f70 R08: 0000000000000000 R09: 0000000000000000
[ 22.051215][ T233] R10: 000000002af00870 R11: 0000000000000293 R12: 00007ffc36bf8408
[ 22.051641][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 22.052120][ T233]
[ 22.052339][ T233] irq event stamp: 1687651
[ 22.052630][ T233] hardirqs last enabled at (1687651): [] irqentry_exit+0x3b/0x80
[ 22.053177][ T233] hardirqs last disabled at (1687650): [] handle_softirqs+0x47f/0x610
[ 22.053550][ T233] softirqs last enabled at (1687462): [] __tun_set_ebpf+0xc6/0x180
[ 22.053894][ T233] softirqs last disabled at (1687460): [] __tun_set_ebpf+0x91/0x180
[ 22.054240][ T233] ---[ end trace 0000000000000000 ]---