[ 15.568871][ T231] ==================================================================
[ 15.569326][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 15.569669][ T231] Read of size 1 at addr ffff888009eb868c by task packetdrill/231
[ 15.570069][ T231]
[ 15.570204][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.570212][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.570216][ T231] Call Trace:
[ 15.570219][ T231]
[ 15.570223][ T231] dump_stack_lvl+0x82/0xc0
[ 15.570231][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 15.570242][ T231] ? kobject_put+0xbb/0xd0
[ 15.570249][ T231] print_report+0xb4/0x270
[ 15.570254][ T231] ? kobject_put+0xbb/0xd0
[ 15.570260][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 15.570266][ T231] ? kobject_put+0xbb/0xd0
[ 15.570271][ T231] kasan_report+0xca/0x100
[ 15.570278][ T231] ? kobject_put+0xbb/0xd0
[ 15.570288][ T231] kobject_put+0xbb/0xd0
[ 15.570294][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.570302][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.570307][ T231] ? netif_state_change+0x228/0x2c0
[ 15.570313][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.570318][ T231] ? generic_xdp_install+0x410/0x410
[ 15.570326][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.570338][ T231] tun_chr_close+0xc0/0x1c0
[ 15.570345][ T231] __fput+0x35c/0xa70
[ 15.570357][ T231] fput_close_sync+0xdd/0x1b0
[ 15.570363][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.570372][ T231] __x64_sys_close+0x7d/0xd0
[ 15.570378][ T231] do_syscall_64+0xc1/0xfd0
[ 15.570386][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.570392][ T231] RIP: 0033:0x4901eb
[ 15.570398][ 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
[ 15.570403][ T231] RSP: 002b:00007ffd2625df70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.570410][ T231] RAX: ffffffffffffffda RBX: 00007ffd2625e4d0 RCX: 00000000004901eb
[ 15.570414][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.570417][ T231] RBP: 00007ffd2625dfb0 R08: 0000000000000000 R09: 0000000000000000
[ 15.570420][ T231] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffd2625e448
[ 15.570423][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.570436][ T231]
[ 15.570438][ T231]
[ 15.578947][ T231] The buggy address belongs to the physical page:
[ 15.579284][ T231] page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888009ebab00 pfn:0x9eb8
[ 15.579835][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 15.580125][ T231] raw: 0080000000000000 ffffea000017f408 ffff88803633bc40 0000000000000000
[ 15.580618][ T231] raw: ffff888009ebab00 0000000000000000 00000000ffffffff 0000000000000000
[ 15.581105][ T231] page dumped because: kasan: bad access detected
[ 15.581451][ T231]
[ 15.581585][ T231] Memory state around the buggy address:
[ 15.581850][ T231] ffff888009eb8580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.582257][ T231] ffff888009eb8600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.582631][ T231] >ffff888009eb8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.582879][ T231] ^
[ 15.583019][ T231] ffff888009eb8700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.583266][ T231] ffff888009eb8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 15.583515][ T231] ==================================================================
[ 15.583914][ T231] Disabling lock debugging due to kernel taint
[ 15.584216][ T231] ------------[ cut here ]------------
[ 15.584400][ T231] refcount_t: underflow; use-after-free.
[ 15.584615][ T231] WARNING: CPU: 2 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 15.584941][ T231] Modules linked in:
[ 15.585108][ T231] CPU: 2 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 15.585507][ T231] Tainted: [B]=BAD_PAGE
[ 15.585656][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 15.585901][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 15.586156][ 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 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
[ 15.586772][ T231] RSP: 0018:ffffc90000b17ce8 EFLAGS: 00010282
[ 15.587029][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 15.587306][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 15.587577][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff64fe134
[ 15.587855][ T231] R10: 0000000000000003 R11: ffffc90000b17880 R12: 0000000000000001
[ 15.588246][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 15.588530][ T231] FS: 000000002b4dd3c0(0000) GS:ffff88808271a000(0000) knlGS:0000000000000000
[ 15.588853][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 15.589102][ T231] CR2: 00007f6252cf3000 CR3: 0000000004d65005 CR4: 0000000000772ef0
[ 15.589373][ T231] PKRU: 55555554
[ 15.589527][ T231] Call Trace:
[ 15.589675][ T231]
[ 15.589789][ T231] netdev_run_todo+0x5f0/0xc60
[ 15.590011][ T231] ? rtnl_is_locked+0x15/0x20
[ 15.590205][ T231] ? netif_state_change+0x228/0x2c0
[ 15.590393][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 15.590622][ T231] ? generic_xdp_install+0x410/0x410
[ 15.590809][ T231] ? tun_chr_close+0xae/0x1c0
[ 15.591017][ T231] tun_chr_close+0xc0/0x1c0
[ 15.591208][ T231] __fput+0x35c/0xa70
[ 15.591361][ T231] fput_close_sync+0xdd/0x1b0
[ 15.591549][ T231] ? alloc_file_clone+0xf0/0xf0
[ 15.591743][ T231] __x64_sys_close+0x7d/0xd0
[ 15.591971][ T231] do_syscall_64+0xc1/0xfd0
[ 15.592173][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 15.592397][ T231] RIP: 0033:0x4901eb
[ 15.592552][ 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
[ 15.593211][ T231] RSP: 002b:00007ffd2625df70 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 15.593484][ T231] RAX: ffffffffffffffda RBX: 00007ffd2625e4d0 RCX: 00000000004901eb
[ 15.593754][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 15.594040][ T231] RBP: 00007ffd2625dfb0 R08: 0000000000000000 R09: 0000000000000000
[ 15.594312][ T231] R10: 0000000000000080 R11: 0000000000000293 R12: 00007ffd2625e448
[ 15.594580][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 15.594859][ T231]
[ 15.595020][ T231] irq event stamp: 1497139
[ 15.595206][ T231] hardirqs last enabled at (1497139): [] irqentry_exit+0x3b/0x80
[ 15.595525][ T231] hardirqs last disabled at (1497138): [] handle_softirqs+0x47f/0x610
[ 15.595840][ T231] softirqs last enabled at (1496946): [] handle_softirqs+0x352/0x610
[ 15.596157][ T231] softirqs last disabled at (1496939): [] irq_exit_rcu+0xab/0x100
[ 15.596468][ T231] ---[ end trace 0000000000000000 ]---