[ 18.037380][ T231] ==================================================================
[ 18.037714][ T231] BUG: KASAN: out-of-bounds in kobject_put+0xbb/0xd0
[ 18.037919][ T231] Read of size 1 at addr ffff888001e5c68c by task packetdrill/231
[ 18.038155][ T231]
[ 18.038237][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.038242][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.038244][ T231] Call Trace:
[ 18.038246][ T231]
[ 18.038248][ T231] dump_stack_lvl+0x82/0xc0
[ 18.038254][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 18.038262][ T231] ? kobject_put+0xbb/0xd0
[ 18.038266][ T231] print_report+0xb4/0x270
[ 18.038270][ T231] ? kobject_put+0xbb/0xd0
[ 18.038273][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 18.038277][ T231] ? kobject_put+0xbb/0xd0
[ 18.038280][ T231] kasan_report+0xca/0x100
[ 18.038284][ T231] ? kobject_put+0xbb/0xd0
[ 18.038289][ T231] kobject_put+0xbb/0xd0
[ 18.038293][ T231] netdev_run_todo+0x5f0/0xc60
[ 18.038299][ T231] ? rtnl_is_locked+0x15/0x20
[ 18.038303][ T231] ? netif_state_change+0x228/0x2c0
[ 18.038307][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.038310][ T231] ? generic_xdp_install+0x410/0x410
[ 18.038314][ T231] ? tun_chr_close+0xae/0x1c0
[ 18.038323][ T231] tun_chr_close+0xc0/0x1c0
[ 18.038326][ T231] __fput+0x35c/0xa70
[ 18.038335][ T231] fput_close_sync+0xdd/0x1b0
[ 18.038338][ T231] ? alloc_file_clone+0xf0/0xf0
[ 18.038343][ T231] __x64_sys_close+0x7d/0xd0
[ 18.038347][ T231] do_syscall_64+0xc1/0xfd0
[ 18.038353][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.038358][ T231] RIP: 0033:0x4901eb
[ 18.038361][ 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
[ 18.038364][ T231] RSP: 002b:00007fff1bf1cf90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.038368][ T231] RAX: ffffffffffffffda RBX: 00007fff1bf1d4f0 RCX: 00000000004901eb
[ 18.038370][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.038372][ T231] RBP: 00007fff1bf1cfd0 R08: 0000000000000000 R09: 0000000000000000
[ 18.038373][ T231] R10: 000000001363ba50 R11: 0000000000000293 R12: 00007fff1bf1d468
[ 18.038375][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.038381][ T231]
[ 18.038382][ T231]
[ 18.044970][ T231] The buggy address belongs to the physical page:
[ 18.045168][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888001e5e500 pfn:0x1e5c
[ 18.045508][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 18.045674][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 18.045957][ T231] raw: ffff888001e5e500 0000000000000000 00000001ffffffff 0000000000000000
[ 18.046236][ T231] page dumped because: kasan: bad access detected
[ 18.046456][ T231]
[ 18.046539][ T231] Memory state around the buggy address:
[ 18.046698][ T231] ffff888001e5c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.046935][ T231] ffff888001e5c600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.047167][ T231] >ffff888001e5c680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.047428][ T231] ^
[ 18.047580][ T231] ffff888001e5c700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.047834][ T231] ffff888001e5c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 18.048063][ T231] ==================================================================
[ 18.048828][ T231] Disabling lock debugging due to kernel taint
[ 18.049031][ T231] ------------[ cut here ]------------
[ 18.049185][ T231] refcount_t: underflow; use-after-free.
[ 18.049368][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 18.050222][ T231] Modules linked in:
[ 18.050356][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 18.051257][ T231] Tainted: [B]=BAD_PAGE
[ 18.051393][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 18.051606][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 18.052348][ 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 85 b1 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
[ 18.052935][ T231] RSP: 0018:ffffc90000a97ce8 EFLAGS: 00010282
[ 18.053128][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 18.053380][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 18.053652][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff643e134
[ 18.053881][ T231] R10: 0000000000000003 R11: ffffc90000a97880 R12: 0000000000000001
[ 18.054113][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 18.054341][ T231] FS: 000000001361b3c0(0000) GS:ffff888082c1a000(0000) knlGS:0000000000000000
[ 18.054640][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 18.054840][ T231] CR2: 00007fcdbf635000 CR3: 000000000a000005 CR4: 0000000000772ef0
[ 18.055077][ T231] PKRU: 55555554
[ 18.055193][ T231] Call Trace:
[ 18.055309][ T231]
[ 18.055392][ T231] netdev_run_todo+0x5f0/0xc60
[ 18.055550][ T231] ? rtnl_is_locked+0x15/0x20
[ 18.055714][ T231] ? netif_state_change+0x228/0x2c0
[ 18.055868][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 18.056068][ T231] ? generic_xdp_install+0x410/0x410
[ 18.056223][ T231] ? tun_chr_close+0xae/0x1c0
[ 18.056379][ T231] tun_chr_close+0xc0/0x1c0
[ 18.056549][ T231] __fput+0x35c/0xa70
[ 18.056690][ T231] fput_close_sync+0xdd/0x1b0
[ 18.056845][ T231] ? alloc_file_clone+0xf0/0xf0
[ 18.057009][ T231] __x64_sys_close+0x7d/0xd0
[ 18.057165][ T231] do_syscall_64+0xc1/0xfd0
[ 18.057335][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 18.057546][ T231] RIP: 0033:0x4901eb
[ 18.057672][ 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
[ 18.058232][ T231] RSP: 002b:00007fff1bf1cf90 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 18.058485][ T231] RAX: ffffffffffffffda RBX: 00007fff1bf1d4f0 RCX: 00000000004901eb
[ 18.058723][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 18.058954][ T231] RBP: 00007fff1bf1cfd0 R08: 0000000000000000 R09: 0000000000000000
[ 18.059186][ T231] R10: 000000001363ba50 R11: 0000000000000293 R12: 00007fff1bf1d468
[ 18.059415][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 18.059644][ T231]
[ 18.059769][ T231] irq event stamp: 1924529
[ 18.059923][ T231] hardirqs last enabled at (1924529): [] irqentry_exit+0x3b/0x80
[ 18.060191][ T231] hardirqs last disabled at (1924528): [] handle_softirqs+0x47f/0x610
[ 18.060461][ T231] softirqs last enabled at (1923434): [] __tun_set_ebpf+0xc6/0x180
[ 18.060729][ T231] softirqs last disabled at (1923432): [] __tun_set_ebpf+0x91/0x180
[ 18.060994][ T231] ---[ end trace 0000000000000000 ]---