[ 16.278316][ T233] ==================================================================
[ 16.278625][ T233] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 16.278839][ T233] Read of size 1 at addr ffff88801054868c by task packetdrill/233
[ 16.279068][ T233]
[ 16.279150][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.279156][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.279159][ T233] Call Trace:
[ 16.279161][ T233]
[ 16.279163][ T233] dump_stack_lvl+0x82/0xc0
[ 16.279169][ T233] print_address_description.constprop.0+0x2c/0x3a0
[ 16.279178][ T233] ? kobject_put+0xbb/0xd0
[ 16.279181][ T233] print_report+0xb4/0x270
[ 16.279185][ T233] ? kobject_put+0xbb/0xd0
[ 16.279188][ T233] ? kasan_addr_to_slab+0x21/0x70
[ 16.279192][ T233] ? kobject_put+0xbb/0xd0
[ 16.279195][ T233] kasan_report+0xca/0x100
[ 16.279199][ T233] ? kobject_put+0xbb/0xd0
[ 16.279204][ T233] kobject_put+0xbb/0xd0
[ 16.279208][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.279214][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.279218][ T233] ? netif_state_change+0x228/0x2c0
[ 16.279221][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.279223][ T233] ? generic_xdp_install+0x410/0x410
[ 16.279227][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.279235][ T233] tun_chr_close+0xc0/0x1c0
[ 16.279239][ T233] __fput+0x35c/0xa70
[ 16.279247][ T233] fput_close_sync+0xdd/0x1b0
[ 16.279250][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.279255][ T233] __x64_sys_close+0x7d/0xd0
[ 16.279259][ T233] do_syscall_64+0xc1/0xfd0
[ 16.279265][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.279270][ T233] RIP: 0033:0x4901eb
[ 16.279275][ 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
[ 16.279278][ T233] RSP: 002b:00007ffc7b502fe0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.279282][ T233] RAX: ffffffffffffffda RBX: 00007ffc7b503540 RCX: 00000000004901eb
[ 16.279284][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.279286][ T233] RBP: 00007ffc7b503020 R08: 0000000000000000 R09: 0000000000000000
[ 16.279287][ T233] R10: 0000000000000008 R11: 0000000000000293 R12: 00007ffc7b5034b8
[ 16.279289][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.279295][ T233]
[ 16.279297][ T233]
[ 16.285897][ T233] The buggy address belongs to the physical page:
[ 16.286100][ T233] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff8880105496c0 pfn:0x10548
[ 16.286437][ T233] flags: 0x80000000000000(node=0|zone=1)
[ 16.286608][ T233] raw: 0080000000000000 ffffea0000496008 ffff88803623bc40 0000000000000000
[ 16.286905][ T233] raw: ffff8880105496c0 0000000000000000 00000000ffffffff 0000000000000000
[ 16.287195][ T233] page dumped because: kasan: bad access detected
[ 16.287401][ T233]
[ 16.287492][ T233] Memory state around the buggy address:
[ 16.287661][ T233] ffff888010548580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.287893][ T233] ffff888010548600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.288120][ T233] >ffff888010548680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.288353][ T233] ^
[ 16.288485][ T233] ffff888010548700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.288760][ T233] ffff888010548780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.288995][ T233] ==================================================================
[ 16.289262][ T233] Disabling lock debugging due to kernel taint
[ 16.289468][ T233] ------------[ cut here ]------------
[ 16.289760][ T233] refcount_t: underflow; use-after-free.
[ 16.289954][ T233] WARNING: CPU: 0 PID: 233 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.290255][ T233] Modules linked in:
[ 16.290395][ T233] CPU: 0 UID: 0 PID: 233 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.290797][ T233] Tainted: [B]=BAD_PAGE
[ 16.290921][ T233] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.291128][ T233] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.291336][ 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 94 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
[ 16.291916][ T233] RSP: 0018:ffffc90000b17ce8 EFLAGS: 00010282
[ 16.292116][ T233] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.292349][ T233] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.292597][ T233] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff297e134
[ 16.292843][ T233] R10: 0000000000000003 R11: ffffc90000b17880 R12: 0000000000000001
[ 16.293075][ T233] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.293311][ T233] FS: 00000000076c73c0(0000) GS:ffff8880a021a000(0000) knlGS:0000000000000000
[ 16.293606][ T233] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.293808][ T233] CR2: 00007f4cf0eda000 CR3: 00000000101ca002 CR4: 0000000000772ef0
[ 16.294042][ T233] PKRU: 55555554
[ 16.294167][ T233] Call Trace:
[ 16.294286][ T233]
[ 16.294370][ T233] netdev_run_todo+0x5f0/0xc60
[ 16.294543][ T233] ? rtnl_is_locked+0x15/0x20
[ 16.294724][ T233] ? netif_state_change+0x228/0x2c0
[ 16.294894][ T233] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.295082][ T233] ? generic_xdp_install+0x410/0x410
[ 16.295232][ T233] ? tun_chr_close+0xae/0x1c0
[ 16.295438][ T233] tun_chr_close+0xc0/0x1c0
[ 16.295618][ T233] __fput+0x35c/0xa70
[ 16.295769][ T233] fput_close_sync+0xdd/0x1b0
[ 16.295924][ T233] ? alloc_file_clone+0xf0/0xf0
[ 16.296082][ T233] __x64_sys_close+0x7d/0xd0
[ 16.296235][ T233] do_syscall_64+0xc1/0xfd0
[ 16.296403][ T233] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.296617][ T233] RIP: 0033:0x4901eb
[ 16.296760][ 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
[ 16.297310][ T233] RSP: 002b:00007ffc7b502fe0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.297564][ T233] RAX: ffffffffffffffda RBX: 00007ffc7b503540 RCX: 00000000004901eb
[ 16.297824][ T233] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.298060][ T233] RBP: 00007ffc7b503020 R08: 0000000000000000 R09: 0000000000000000
[ 16.298300][ T233] R10: 0000000000000008 R11: 0000000000000293 R12: 00007ffc7b5034b8
[ 16.298539][ T233] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.298795][ T233]
[ 16.298918][ T233] irq event stamp: 2109853
[ 16.299073][ T233] hardirqs last enabled at (2109853): [] irqentry_exit+0x3b/0x80
[ 16.299344][ T233] hardirqs last disabled at (2109852): [] handle_softirqs+0x47f/0x610
[ 16.299639][ T233] softirqs last enabled at (2109662): [] __tun_set_ebpf+0xc6/0x180
[ 16.299914][ T233] softirqs last disabled at (2109660): [] __tun_set_ebpf+0x91/0x180
[ 16.300179][ T233] ---[ end trace 0000000000000000 ]---