[ 16.534169][ T251] tun: Universal TUN/TAP device driver, 1.6
[ 20.626666][ T258] ==================================================================
[ 20.626990][ T258] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 20.627216][ T258] Read of size 1 at addr ffff888005bf46ac by task packetdrill/258
[ 20.627506][ T258]
[ 20.627597][ T258] CPU: 0 UID: 0 PID: 258 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.627602][ T258] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.627604][ T258] Call Trace:
[ 20.627606][ T258]
[ 20.627608][ T258] dump_stack_lvl+0x82/0xc0
[ 20.627614][ T258] print_address_description.constprop.0+0x2c/0x3a0
[ 20.627624][ T258] ? kobject_put+0xbb/0xd0
[ 20.627628][ T258] print_report+0xb4/0x270
[ 20.627632][ T258] ? kobject_put+0xbb/0xd0
[ 20.627635][ T258] ? kasan_addr_to_slab+0x21/0x70
[ 20.627638][ T258] ? kobject_put+0xbb/0xd0
[ 20.627641][ T258] kasan_report+0xca/0x100
[ 20.627646][ T258] ? kobject_put+0xbb/0xd0
[ 20.627652][ T258] kobject_put+0xbb/0xd0
[ 20.627655][ T258] netdev_run_todo+0x5f0/0xc60
[ 20.627662][ T258] ? rtnl_is_locked+0x15/0x20
[ 20.627666][ T258] ? netif_state_change+0x228/0x2c0
[ 20.627669][ T258] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.627672][ T258] ? generic_xdp_install+0x410/0x410
[ 20.627677][ T258] ? tun_chr_close+0xae/0x1c0 [tun]
[ 20.627687][ T258] tun_chr_close+0xc0/0x1c0 [tun]
[ 20.627693][ T258] __fput+0x35c/0xa70
[ 20.627701][ T258] fput_close_sync+0xdd/0x1b0
[ 20.627705][ T258] ? alloc_file_clone+0xf0/0xf0
[ 20.627710][ T258] __x64_sys_close+0x7d/0xd0
[ 20.627714][ T258] do_syscall_64+0xc1/0xfd0
[ 20.627722][ T258] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.627726][ T258] RIP: 0033:0x4901eb
[ 20.627730][ T258] 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
[ 20.627733][ T258] RSP: 002b:00007fff9eb9cc30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.627737][ T258] RAX: ffffffffffffffda RBX: 00007fff9eb9d148 RCX: 00000000004901eb
[ 20.627739][ T258] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006
[ 20.627740][ T258] RBP: 00007fff9eb9cc70 R08: 0000000000000000 R09: 0000000000000000
[ 20.627742][ T258] R10: 0000000017feb050 R11: 0000000000000293 R12: 00007fff9eb9d108
[ 20.627744][ T258] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.627750][ T258]
[ 20.627752][ T258]
[ 20.634844][ T258] The buggy address belongs to the physical page:
[ 20.635056][ T258] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888005bf7d00 pfn:0x5bf4
[ 20.635403][ T258] flags: 0x80000000000000(node=0|zone=1)
[ 20.635586][ T258] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 20.635895][ T258] raw: ffff888005bf7d00 0000000000000000 00000001ffffffff 0000000000000000
[ 20.636201][ T258] page dumped because: kasan: bad access detected
[ 20.636411][ T258]
[ 20.636500][ T258] Memory state around the buggy address:
[ 20.636669][ T258] ffff888005bf4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.636930][ T258] ffff888005bf4600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.637180][ T258] >ffff888005bf4680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.637433][ T258] ^
[ 20.637606][ T258] ffff888005bf4700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.637863][ T258] ffff888005bf4780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.638114][ T258] ==================================================================
[ 20.638395][ T258] Disabling lock debugging due to kernel taint
[ 20.638604][ T258] ------------[ cut here ]------------
[ 20.638768][ T258] refcount_t: underflow; use-after-free.
[ 20.639118][ T258] WARNING: CPU: 0 PID: 258 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.639416][ T258] Modules linked in: xt_tcpudp xt_conntrack nft_compat nf_tables x_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tun
[ 20.639806][ T258] CPU: 0 UID: 0 PID: 258 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.640205][ T258] Tainted: [B]=BAD_PAGE
[ 20.640340][ T258] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.640552][ T258] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.640768][ T258] Code: 83 90 02 80 fb 01 0f 87 95 6b d6 fe 83 e3 01 0f 85 51 ff ff ff c6 05 b1 83 90 02 01 90 48 c7 c7 a0 de e5 8e e8 c2 8b 15 ff 90 <0f> 0b 90 90 e9 33 ff ff ff 48 89 df e8 f0 34 a1 ff e9 ba fe ff ff
[ 20.641379][ T258] RSP: 0018:ffffc90000b77ce8 EFLAGS: 00010282
[ 20.641596][ T258] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.641849][ T258] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.642109][ T258] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff1efe220
[ 20.642364][ T258] R10: 0000000000000003 R11: ffffc90000b77880 R12: 0000000000000001
[ 20.642623][ T258] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.642885][ T258] FS: 0000000017fe33c0(0000) GS:ffff8880a55ec000(0000) knlGS:0000000000000000
[ 20.643180][ T258] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.643395][ T258] CR2: 00007ff346643000 CR3: 0000000009411005 CR4: 0000000000772ef0
[ 20.643652][ T258] PKRU: 55555554
[ 20.643780][ T258] Call Trace:
[ 20.643916][ T258]
[ 20.644005][ T258] netdev_run_todo+0x5f0/0xc60
[ 20.644177][ T258] ? rtnl_is_locked+0x15/0x20
[ 20.644359][ T258] ? netif_state_change+0x228/0x2c0
[ 20.644527][ T258] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.644736][ T258] ? generic_xdp_install+0x410/0x410
[ 20.644919][ T258] ? tun_chr_close+0xae/0x1c0 [tun]
[ 20.645095][ T258] tun_chr_close+0xc0/0x1c0 [tun]
[ 20.645266][ T258] __fput+0x35c/0xa70
[ 20.645398][ T258] fput_close_sync+0xdd/0x1b0
[ 20.645571][ T258] ? alloc_file_clone+0xf0/0xf0
[ 20.645744][ T258] __x64_sys_close+0x7d/0xd0
[ 20.645924][ T258] do_syscall_64+0xc1/0xfd0
[ 20.646099][ T258] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.646310][ T258] RIP: 0033:0x4901eb
[ 20.646448][ T258] 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
[ 20.647062][ T258] RSP: 002b:00007fff9eb9cc30 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.647317][ T258] RAX: ffffffffffffffda RBX: 00007fff9eb9d148 RCX: 00000000004901eb
[ 20.647574][ T258] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006
[ 20.647832][ T258] RBP: 00007fff9eb9cc70 R08: 0000000000000000 R09: 0000000000000000
[ 20.648095][ T258] R10: 0000000017feb050 R11: 0000000000000293 R12: 00007fff9eb9d108
[ 20.648446][ T258] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.648708][ T258]
[ 20.648839][ T258] irq event stamp: 2114807
[ 20.649017][ T258] hardirqs last enabled at (2114807): [] irqentry_exit+0x3b/0x80
[ 20.649403][ T258] hardirqs last disabled at (2114806): [] handle_softirqs+0x47f/0x610
[ 20.649700][ T258] softirqs last enabled at (2114616): [] __tun_set_ebpf+0xc6/0x180 [tun]
[ 20.650039][ T258] softirqs last disabled at (2114614): [] __tun_set_ebpf+0x91/0x180 [tun]
[ 20.650374][ T258] ---[ end trace 0000000000000000 ]---