[ 16.784958][ T231] ==================================================================
[ 16.785411][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 16.785734][ T231] Read of size 1 at addr ffff888008df068c by task packetdrill/231
[ 16.786105][ T231]
[ 16.786234][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.786241][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.786244][ T231] Call Trace:
[ 16.786247][ T231]
[ 16.786250][ T231] dump_stack_lvl+0x82/0xc0
[ 16.786259][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 16.786268][ T231] ? kobject_put+0xbb/0xd0
[ 16.786275][ T231] print_report+0xb4/0x270
[ 16.786280][ T231] ? kobject_put+0xbb/0xd0
[ 16.786286][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 16.786292][ T231] ? kobject_put+0xbb/0xd0
[ 16.786297][ T231] kasan_report+0xca/0x100
[ 16.786303][ T231] ? kobject_put+0xbb/0xd0
[ 16.786311][ T231] kobject_put+0xbb/0xd0
[ 16.786316][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.786323][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.786328][ T231] ? netif_state_change+0x228/0x2c0
[ 16.786333][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.786338][ T231] ? generic_xdp_install+0x410/0x410
[ 16.786346][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.786357][ T231] tun_chr_close+0xc0/0x1c0
[ 16.786363][ T231] __fput+0x35c/0xa70
[ 16.786375][ T231] fput_close_sync+0xdd/0x1b0
[ 16.786380][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.786390][ T231] __x64_sys_close+0x7d/0xd0
[ 16.786395][ T231] do_syscall_64+0xc1/0xfd0
[ 16.786403][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.786410][ T231] RIP: 0033:0x4901eb
[ 16.786416][ 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
[ 16.786420][ T231] RSP: 002b:00007ffc7da02780 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.786426][ T231] RAX: ffffffffffffffda RBX: 00007ffc7da02ce0 RCX: 00000000004901eb
[ 16.786429][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.786432][ T231] RBP: 00007ffc7da027c0 R08: 0000000000000000 R09: 0000000000000000
[ 16.786435][ T231] R10: 0000000000100000 R11: 0000000000000293 R12: 00007ffc7da02c58
[ 16.786439][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.786451][ T231]
[ 16.786453][ T231]
[ 16.796920][ T231] The buggy address belongs to the physical page:
[ 16.797227][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888008df11c0 pfn:0x8df0
[ 16.797751][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 16.797985][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 16.798425][ T231] raw: ffff888008df11c0 0000000000000000 00000001ffffffff 0000000000000000
[ 16.798891][ T231] page dumped because: kasan: bad access detected
[ 16.799211][ T231]
[ 16.799335][ T231] Memory state around the buggy address:
[ 16.799587][ T231] ffff888008df0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.799966][ T231] ffff888008df0600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.800324][ T231] >ffff888008df0680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.800700][ T231] ^
[ 16.800927][ T231] ffff888008df0700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.801278][ T231] ffff888008df0780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 16.801644][ T231] ==================================================================
[ 16.802383][ T231] Disabling lock debugging due to kernel taint
[ 16.802728][ T231] ------------[ cut here ]------------
[ 16.802995][ T231] refcount_t: underflow; use-after-free.
[ 16.803308][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 16.803775][ T231] Modules linked in:
[ 16.804004][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 16.804605][ T231] Tainted: [B]=BAD_PAGE
[ 16.804829][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 16.805170][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 16.805530][ 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 e5 8c 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
[ 16.806474][ T231] RSP: 0018:ffffc90000af7ce8 EFLAGS: 00010282
[ 16.806828][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 16.807248][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 16.807655][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1afe134
[ 16.808050][ T231] R10: 0000000000000003 R11: ffffc90000af7880 R12: 0000000000000001
[ 16.808477][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 16.808885][ T231] FS: 000000001e7ce3c0(0000) GS:ffff8880a1d1a000(0000) knlGS:0000000000000000
[ 16.809367][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 16.809717][ T231] CR2: 00007f697c2e3000 CR3: 0000000005110006 CR4: 0000000000772ef0
[ 16.810125][ T231] PKRU: 55555554
[ 16.810355][ T231] Call Trace:
[ 16.810571][ T231]
[ 16.810727][ T231] netdev_run_todo+0x5f0/0xc60
[ 16.811019][ T231] ? rtnl_is_locked+0x15/0x20
[ 16.811304][ T231] ? netif_state_change+0x228/0x2c0
[ 16.811577][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 16.811910][ T231] ? generic_xdp_install+0x410/0x410
[ 16.812184][ T231] ? tun_chr_close+0xae/0x1c0
[ 16.812494][ T231] tun_chr_close+0xc0/0x1c0
[ 16.812777][ T231] __fput+0x35c/0xa70
[ 16.812998][ T231] fput_close_sync+0xdd/0x1b0
[ 16.813285][ T231] ? alloc_file_clone+0xf0/0xf0
[ 16.813564][ T231] __x64_sys_close+0x7d/0xd0
[ 16.813869][ T231] do_syscall_64+0xc1/0xfd0
[ 16.814143][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 16.814489][ T231] RIP: 0033:0x4901eb
[ 16.814726][ 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
[ 16.815671][ T231] RSP: 002b:00007ffc7da02780 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 16.816081][ T231] RAX: ffffffffffffffda RBX: 00007ffc7da02ce0 RCX: 00000000004901eb
[ 16.816494][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 16.816918][ T231] RBP: 00007ffc7da027c0 R08: 0000000000000000 R09: 0000000000000000
[ 16.817354][ T231] R10: 0000000000100000 R11: 0000000000000293 R12: 00007ffc7da02c58
[ 16.817779][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 16.818218][ T231]
[ 16.818448][ T231] irq event stamp: 2041845
[ 16.818720][ T231] hardirqs last enabled at (2041845): [] irqentry_exit+0x3b/0x80
[ 16.819211][ T231] hardirqs last disabled at (2041844): [] handle_softirqs+0x47f/0x610
[ 16.819686][ T231] softirqs last enabled at (2041374): [] handle_softirqs+0x352/0x610
[ 16.820143][ T231] softirqs last disabled at (2041367): [] irq_exit_rcu+0xab/0x100
[ 16.820609][ T231] ---[ end trace 0000000000000000 ]---