[ 23.333496][ T251] tun: Universal TUN/TAP device driver, 1.6
[ 28.817765][ T258] ==================================================================
[ 28.818138][ T258] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 28.818368][ T258] Read of size 1 at addr ffff88800ed246ac by task packetdrill/258
[ 28.818667][ T258]
[ 28.818763][ T258] CPU: 3 UID: 0 PID: 258 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.818768][ T258] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.818770][ T258] Call Trace:
[ 28.818772][ T258]
[ 28.818774][ T258] dump_stack_lvl+0x82/0xc0
[ 28.818780][ T258] print_address_description.constprop.0+0x2c/0x3a0
[ 28.818787][ T258] ? kobject_put+0xbb/0xd0
[ 28.818791][ T258] print_report+0xb4/0x270
[ 28.818795][ T258] ? kobject_put+0xbb/0xd0
[ 28.818798][ T258] ? kasan_addr_to_slab+0x21/0x70
[ 28.818802][ T258] ? kobject_put+0xbb/0xd0
[ 28.818805][ T258] kasan_report+0xca/0x100
[ 28.818809][ T258] ? kobject_put+0xbb/0xd0
[ 28.818815][ T258] kobject_put+0xbb/0xd0
[ 28.818818][ T258] netdev_run_todo+0x5f0/0xc60
[ 28.818823][ T258] ? rtnl_is_locked+0x15/0x20
[ 28.818827][ T258] ? netif_state_change+0x228/0x2c0
[ 28.818830][ T258] ? call_netdevice_notifiers_info+0x100/0x100
[ 28.818833][ T258] ? generic_xdp_install+0x410/0x410
[ 28.818837][ T258] ? tun_chr_close+0xae/0x1c0 [tun]
[ 28.818847][ T258] tun_chr_close+0xc0/0x1c0 [tun]
[ 28.818853][ T258] __fput+0x35c/0xa70
[ 28.818860][ T258] fput_close_sync+0xdd/0x1b0
[ 28.818863][ T258] ? alloc_file_clone+0xf0/0xf0
[ 28.818868][ T258] __x64_sys_close+0x7d/0xd0
[ 28.818872][ T258] do_syscall_64+0xc1/0xfd0
[ 28.818879][ T258] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 28.818882][ T258] RIP: 0033:0x4901eb
[ 28.818887][ 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
[ 28.818890][ T258] RSP: 002b:00007ffe62a604c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 28.818893][ T258] RAX: ffffffffffffffda RBX: 00007ffe62a609d8 RCX: 00000000004901eb
[ 28.818896][ T258] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006
[ 28.818897][ T258] RBP: 00007ffe62a60500 R08: 0000000000000000 R09: 0000000000000000
[ 28.818899][ T258] R10: 000000003f210050 R11: 0000000000000293 R12: 00007ffe62a60998
[ 28.818900][ T258] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 28.818907][ T258]
[ 28.818908][ T258]
[ 28.826416][ T258] The buggy address belongs to the physical page:
[ 28.826656][ T258] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed24
[ 28.826974][ T258] flags: 0x80000000000000(node=0|zone=1)
[ 28.827173][ T258] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 28.827531][ T258] raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
[ 28.827852][ T258] page dumped because: kasan: bad access detected
[ 28.828092][ T258]
[ 28.828182][ T258] Memory state around the buggy address:
[ 28.828356][ T258] ffff88800ed24580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 28.828634][ T258] ffff88800ed24600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 28.828893][ T258] >ffff88800ed24680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 28.829173][ T258] ^
[ 28.829345][ T258] ffff88800ed24700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 28.829611][ T258] ffff88800ed24780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 28.829866][ T258] ==================================================================
[ 28.830163][ T258] Disabling lock debugging due to kernel taint
[ 28.830384][ T258] ------------[ cut here ]------------
[ 28.830568][ T258] refcount_t: underflow; use-after-free.
[ 28.830764][ T258] WARNING: CPU: 3 PID: 258 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 28.831087][ T258] Modules linked in: xt_tcpudp xt_conntrack nft_compat nf_tables x_tables nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 tun
[ 28.831511][ T258] CPU: 3 UID: 0 PID: 258 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 28.831902][ T258] Tainted: [B]=BAD_PAGE
[ 28.832041][ T258] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 28.832270][ T258] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 28.832560][ 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 85 bb 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
[ 28.833222][ T258] RSP: 0018:ffffc900009b7ce8 EFLAGS: 00010282
[ 28.833455][ T258] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 28.833719][ T258] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 28.833987][ T258] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff783e220
[ 28.834268][ T258] R10: 0000000000000003 R11: ffffc900009b7880 R12: 0000000000000001
[ 28.834558][ T258] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 28.834830][ T258] FS: 000000003f2083c0(0000) GS:ffff888078d6c000(0000) knlGS:0000000000000000
[ 28.835154][ T258] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 28.835420][ T258] CR2: 00007f0562bac000 CR3: 000000000eca9003 CR4: 0000000000772ef0
[ 28.835715][ T258] PKRU: 55555554
[ 28.835850][ T258] Call Trace:
[ 28.835982][ T258]
[ 28.836094][ T258] netdev_run_todo+0x5f0/0xc60
[ 28.836303][ T258] ? rtnl_is_locked+0x15/0x20
[ 28.836521][ T258] ? netif_state_change+0x228/0x2c0
[ 28.836697][ T258] ? call_netdevice_notifiers_info+0x100/0x100
[ 28.836910][ T258] ? generic_xdp_install+0x410/0x410
[ 28.837104][ T258] ? tun_chr_close+0xae/0x1c0 [tun]
[ 28.837286][ T258] tun_chr_close+0xc0/0x1c0 [tun]
[ 28.837501][ T258] __fput+0x35c/0xa70
[ 28.837639][ T258] fput_close_sync+0xdd/0x1b0
[ 28.837820][ T258] ? alloc_file_clone+0xf0/0xf0
[ 28.837996][ T258] __x64_sys_close+0x7d/0xd0
[ 28.838190][ T258] do_syscall_64+0xc1/0xfd0
[ 28.838374][ T258] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 28.838618][ T258] RIP: 0033:0x4901eb
[ 28.838759][ 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
[ 28.839423][ T258] RSP: 002b:00007ffe62a604c0 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 28.839708][ T258] RAX: ffffffffffffffda RBX: 00007ffe62a609d8 RCX: 00000000004901eb
[ 28.839969][ T258] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000006
[ 28.840247][ T258] RBP: 00007ffe62a60500 R08: 0000000000000000 R09: 0000000000000000
[ 28.840536][ T258] R10: 000000003f210050 R11: 0000000000000293 R12: 00007ffe62a60998
[ 28.840804][ T258] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 28.841082][ T258]
[ 28.841221][ T258] irq event stamp: 2034211
[ 28.841402][ T258] hardirqs last enabled at (2034211): [] irqentry_exit+0x3b/0x80
[ 28.841726][ T258] hardirqs last disabled at (2034210): [] sysvec_apic_timer_interrupt+0xf/0xc0
[ 28.842091][ T258] softirqs last enabled at (2034028): [] __tun_set_ebpf+0xc6/0x180 [tun]
[ 28.842467][ T258] softirqs last disabled at (2034026): [] __tun_set_ebpf+0x91/0x180 [tun]
[ 28.842913][ T258] ---[ end trace 0000000000000000 ]---