[ 20.920186][ T231] ==================================================================
[ 20.920557][ T231] BUG: KASAN: use-after-free in kobject_put+0xbb/0xd0
[ 20.920793][ T231] Read of size 1 at addr ffff88800ba1868c by task packetdrill/231
[ 20.921057][ T231]
[ 20.921149][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Not tainted 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.921154][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.921157][ T231] Call Trace:
[ 20.921159][ T231]
[ 20.921160][ T231] dump_stack_lvl+0x82/0xc0
[ 20.921167][ T231] print_address_description.constprop.0+0x2c/0x3a0
[ 20.921175][ T231] ? kobject_put+0xbb/0xd0
[ 20.921179][ T231] print_report+0xb4/0x270
[ 20.921182][ T231] ? kobject_put+0xbb/0xd0
[ 20.921186][ T231] ? kasan_addr_to_slab+0x21/0x70
[ 20.921189][ T231] ? kobject_put+0xbb/0xd0
[ 20.921192][ T231] kasan_report+0xca/0x100
[ 20.921196][ T231] ? kobject_put+0xbb/0xd0
[ 20.921201][ T231] kobject_put+0xbb/0xd0
[ 20.921205][ T231] netdev_run_todo+0x5f0/0xc60
[ 20.921211][ T231] ? rtnl_is_locked+0x15/0x20
[ 20.921217][ T231] ? netif_state_change+0x228/0x2c0
[ 20.921222][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.921226][ T231] ? generic_xdp_install+0x410/0x410
[ 20.921234][ T231] ? tun_chr_close+0xae/0x1c0
[ 20.921246][ T231] tun_chr_close+0xc0/0x1c0
[ 20.921250][ T231] __fput+0x35c/0xa70
[ 20.921259][ T231] fput_close_sync+0xdd/0x1b0
[ 20.921263][ T231] ? alloc_file_clone+0xf0/0xf0
[ 20.921267][ T231] __x64_sys_close+0x7d/0xd0
[ 20.921271][ T231] do_syscall_64+0xc1/0xfd0
[ 20.921278][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.921282][ T231] RIP: 0033:0x4901eb
[ 20.921287][ 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
[ 20.921289][ T231] RSP: 002b:00007ffd1b29c600 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.921293][ T231] RAX: ffffffffffffffda RBX: 00007ffd1b29cb60 RCX: 00000000004901eb
[ 20.921295][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 20.921297][ T231] RBP: 00007ffd1b29c640 R08: 0000000000000000 R09: 0000000000000000
[ 20.921299][ T231] R10: 00000000190c9030 R11: 0000000000000293 R12: 00007ffd1b29cad8
[ 20.921301][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.921307][ T231]
[ 20.921308][ T231]
[ 20.928177][ T231] The buggy address belongs to the physical page:
[ 20.928398][ T231] page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ba1f000 pfn:0xba18
[ 20.928728][ T231] flags: 0x80000000000000(node=0|zone=1)
[ 20.928901][ T231] raw: 0080000000000000 0000000000000000 dead000000000122 0000000000000000
[ 20.929247][ T231] raw: ffff88800ba1f000 0000000000000000 00000001ffffffff 0000000000000000
[ 20.929533][ T231] page dumped because: kasan: bad access detected
[ 20.929758][ T231]
[ 20.929839][ T231] Memory state around the buggy address:
[ 20.929999][ T231] ffff88800ba18580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.930266][ T231] ffff88800ba18600: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.930536][ T231] >ffff88800ba18680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.930781][ T231] ^
[ 20.930908][ T231] ffff88800ba18700: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.931138][ T231] ffff88800ba18780: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[ 20.931366][ T231] ==================================================================
[ 20.931752][ T231] Disabling lock debugging due to kernel taint
[ 20.931952][ T231] ------------[ cut here ]------------
[ 20.932114][ T231] refcount_t: underflow; use-after-free.
[ 20.932295][ T231] WARNING: CPU: 0 PID: 231 at lib/refcount.c:28 refcount_warn_saturate+0x16f/0x1b0
[ 20.932576][ T231] Modules linked in:
[ 20.932707][ T231] CPU: 0 UID: 0 PID: 231 Comm: packetdrill Tainted: G B 6.18.0-rc4-virtme #1 PREEMPT(full)
[ 20.933106][ T231] Tainted: [B]=BAD_PAGE
[ 20.933229][ T231] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 20.933427][ T231] RIP: 0010:refcount_warn_saturate+0x16f/0x1b0
[ 20.933629][ 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 05 a5 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
[ 20.934219][ T231] RSP: 0018:ffffc90000b27ce8 EFLAGS: 00010282
[ 20.934421][ T231] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000
[ 20.934684][ T231] RDX: 0000000000000002 RSI: 0000000000000004 RDI: 0000000000000001
[ 20.934931][ T231] RBP: 0000000000000003 R08: 0000000000000000 R09: fffffbfff4b3e134
[ 20.935178][ T231] R10: 0000000000000003 R11: ffffc90000b27880 R12: 0000000000000001
[ 20.935414][ T231] R13: dffffc0000000000 R14: dead000000000122 R15: dead000000000100
[ 20.935657][ T231] FS: 00000000190c13c0(0000) GS:ffff88808f41a000(0000) knlGS:0000000000000000
[ 20.935951][ T231] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 20.936152][ T231] CR2: 00007fdb8c258000 CR3: 0000000004fd5004 CR4: 0000000000772ef0
[ 20.936391][ T231] PKRU: 55555554
[ 20.936507][ T231] Call Trace:
[ 20.936648][ T231]
[ 20.936729][ T231] netdev_run_todo+0x5f0/0xc60
[ 20.936888][ T231] ? rtnl_is_locked+0x15/0x20
[ 20.937042][ T231] ? netif_state_change+0x228/0x2c0
[ 20.937218][ T231] ? call_netdevice_notifiers_info+0x100/0x100
[ 20.937413][ T231] ? generic_xdp_install+0x410/0x410
[ 20.937596][ T231] ? tun_chr_close+0xae/0x1c0
[ 20.937752][ T231] tun_chr_close+0xc0/0x1c0
[ 20.937905][ T231] __fput+0x35c/0xa70
[ 20.938034][ T231] fput_close_sync+0xdd/0x1b0
[ 20.938194][ T231] ? alloc_file_clone+0xf0/0xf0
[ 20.938355][ T231] __x64_sys_close+0x7d/0xd0
[ 20.938518][ T231] do_syscall_64+0xc1/0xfd0
[ 20.938677][ T231] entry_SYSCALL_64_after_hwframe+0x4b/0x53
[ 20.938870][ T231] RIP: 0033:0x4901eb
[ 20.938999][ 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
[ 20.939582][ T231] RSP: 002b:00007ffd1b29c600 EFLAGS: 00000293 ORIG_RAX: 0000000000000003
[ 20.939825][ T231] RAX: ffffffffffffffda RBX: 00007ffd1b29cb60 RCX: 00000000004901eb
[ 20.940079][ T231] RDX: 0000000000000002 RSI: 0000000000000002 RDI: 0000000000000005
[ 20.940339][ T231] RBP: 00007ffd1b29c640 R08: 0000000000000000 R09: 0000000000000000
[ 20.940586][ T231] R10: 00000000190c9030 R11: 0000000000000293 R12: 00007ffd1b29cad8
[ 20.940827][ T231] R13: 0000000000000001 R14: 000000000054e030 R15: 0000000000000001
[ 20.941068][ T231]
[ 20.941197][ T231] irq event stamp: 1737517
[ 20.941357][ T231] hardirqs last enabled at (1737517): [] irqentry_exit+0x3b/0x80
[ 20.941648][ T231] hardirqs last disabled at (1737516): [] handle_softirqs+0x47f/0x610
[ 20.941923][ T231] softirqs last enabled at (1737238): [] handle_softirqs+0x352/0x610
[ 20.942211][ T231] softirqs last disabled at (1737231): [] irq_exit_rcu+0xab/0x100
[ 20.942483][ T231] ---[ end trace 0000000000000000 ]---