Starting sshd: OK
syzkaller
syzkaller login: [ 33.519792][ T1683] cgroup: Unknown subsys name 'net'
[ 33.621943][ T1683] cgroup: Unknown subsys name 'cpuset'
[ 33.628775][ T1683] cgroup: Unknown subsys name 'rlimit'
[ 34.370747][ T1690] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
[ 34.398776][ T1711] soft_limit_in_bytes is deprecated and will be removed. Please report your usecase to linux-mm@kvack.org if you depend on this functionality.
Warning: Permanently added '10.128.1.12' (ED25519) to the list of known hosts.
2025/06/24 04:14:10 ignoring optional flag "sandboxArg"="0"
2025/06/24 04:14:10 ignoring optional flag "type"="gce"
2025/06/24 04:14:11 parsed 1 programs
[ 57.385875][ T2595] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
2025/06/24 04:14:14 executed programs: 0
[ 61.508282][ T3485] loop0: detected capacity change from 0 to 256
[ 61.517959][ T3485] exFAT-fs (loop0): failed to load upcase table (idx : 0x000104d0, chksum : 0x60d18cac, utbl_chksum : 0xe619d30d)
2025/06/24 04:14:46 executed programs: 1
2025/06/24 04:14:51 executed programs: 388
2025/06/24 04:14:56 executed programs: 1021
2025/06/24 04:15:01 executed programs: 1658
2025/06/24 04:15:06 executed programs: 2297
2025/06/24 04:15:11 executed programs: 2937
2025/06/24 04:15:16 executed programs: 3573
2025/06/24 04:15:21 executed programs: 4211
2025/06/24 04:15:26 executed programs: 4840
2025/06/24 04:15:31 executed programs: 5481
2025/06/24 04:15:36 executed programs: 6120
2025/06/24 04:15:41 executed programs: 6758
2025/06/24 04:15:46 executed programs: 7389
2025/06/24 04:15:51 executed programs: 8029
2025/06/24 04:15:56 executed programs: 8670
2025/06/24 04:16:01 executed programs: 9310
2025/06/24 04:16:06 executed programs: 9951
2025/06/24 04:16:11 executed programs: 10598
2025/06/24 04:16:16 executed programs: 11237
2025/06/24 04:16:21 executed programs: 11883
2025/06/24 04:16:26 executed programs: 12521
2025/06/24 04:16:31 executed programs: 13162
2025/06/24 04:16:36 executed programs: 13802
2025/06/24 04:16:41 executed programs: 14438
2025/06/24 04:16:46 executed programs: 15075
2025/06/24 04:16:51 executed programs: 15713
[ 217.670503][ T31] INFO: task syz-executor.0:3485 blocked for more than 143 seconds.
[ 217.678551][ T31] Not tainted 6.16.0-rc3-syzkaller #0
[ 217.684490][ T31] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 217.693303][ T31] task:syz-executor.0 state:D stack:13560 pid:3485 tgid:3484 ppid:3070 task_flags:0x400140 flags:0x00004006
[ 217.705271][ T31] Call Trace:
[ 217.708557][ T31]
[ 217.711536][ T31] __schedule+0x75b/0xc20
[ 217.715881][ T31] ? schedule+0xac/0x140
[ 217.720132][ T31] ? schedule+0x21/0x140
[ 217.724425][ T31] schedule+0xac/0x140
[ 217.728494][ T31] schedule_preempt_disabled+0x32/0x60
[ 217.734029][ T31] rwsem_down_write_slowpath+0x3d4/0x6e0
[ 217.739886][ T31] down_write+0x61/0x90
[ 217.744117][ T31] vfs_rmdir+0x58/0x180
[ 217.748337][ T31] do_rmdir+0x124/0x320
[ 217.752551][ T31] __x64_sys_rmdir+0x1c/0x30
[ 217.757144][ T31] do_syscall_64+0x8f/0x250
[ 217.761725][ T31] ? clear_bhb_loop+0x40/0x90
[ 217.766426][ T31] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 217.772392][ T31] RIP: 0033:0x7f70dcc7cee9
[ 217.776840][ T31] RSP: 002b:00007f70dda990c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
[ 217.785300][ T31] RAX: ffffffffffffffda RBX: 00007f70dcdb3fa0 RCX: 00007f70dcc7cee9
[ 217.793317][ T31] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180
[ 217.801319][ T31] RBP: 00007f70dccc947f R08: 0000000000000000 R09: 0000000000000000
[ 217.809298][ T31] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
[ 217.817475][ T31] R13: 0000000000000006 R14: 00007f70dcdb3fa0 R15: 00007fff825ff888
[ 217.825465][ T31]
[ 217.828508][ T31]
[ 217.828508][ T31] Showing all locks held in the system:
[ 217.836346][ T31] 1 lock held by khungtaskd/31:
[ 217.841213][ T31] #0: ffffffff835deb30 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x2e/0x100
[ 217.851190][ T31] 3 locks held by kworker/u8:3/114:
[ 217.856398][ T31] 2 locks held by getty/1588:
[ 217.861077][ T31] #0: ffff88810f2bd8a0 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x40
[ 217.870821][ T31] #1: ffffc90002e3b2f0 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x1c3/0x6e0
[ 217.880847][ T31] 3 locks held by syz-executor.0/3485:
[ 217.886317][ T31] #0: ffff88810f2ad418 (sb_writers#11){....}-{0:0}, at: do_rmdir+0xae/0x320
[ 217.895115][ T31] #1: ffff88817c8d9470 (&sb->s_type->i_mutex_key#18/1){....}-{3:3}, at: do_rmdir+0xd1/0x320
[ 217.905319][ T31] #2: ffff88817c8d9470 (&sb->s_type->i_mutex_key#19){....}-{3:3}, at: vfs_rmdir+0x58/0x180
[ 217.915548][ T31] 4 locks held by syz-executor.0/3218:
[ 217.921050][ T31] #0: ffff888237c2b518 (&rq->__lock){....}-{2:2}, at: raw_spin_rq_lock_nested+0x20/0x70
[ 217.931008][ T31] #1: ffffffff835deb30 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x1c/0xe0
[ 217.940676][ T31] #2: ffffffff84eb4350 (&obj_hash[i].lock){....}-{2:2}, at: debug_object_deactivate+0x4e/0x110
[ 217.951121][ T31] #3: ffff888102f4cce0 (&____s->seqcount#5){....}-{0:0}, at: do_exit+0x674/0x9a0
[ 217.960338][ T31]
[ 217.962690][ T31] =============================================
[ 217.962690][ T31]
[ 217.971223][ T31] NMI backtrace for cpu 1
[ 217.971235][ T31] CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef)
[ 217.971239][ T31] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 217.971241][ T31] Call Trace:
[ 217.971244][ T31]
[ 217.971246][ T31] dump_stack_lvl+0xa2/0xf0
[ 217.971253][ T31] nmi_cpu_backtrace+0x109/0x170
[ 217.971260][ T31] ? __pfx_nmi_raise_cpu_backtrace+0x10/0x10
[ 217.971265][ T31] nmi_trigger_cpumask_backtrace+0x8e/0x140
[ 217.971271][ T31] watchdog+0x604/0x630
[ 217.971277][ T31] ? watchdog+0xd1/0x630
[ 217.971282][ T31] ? __pfx_watchdog+0x10/0x10
[ 217.971287][ T31] kthread+0x200/0x230
[ 217.971292][ T31] ? __pfx_kthread+0x10/0x10
[ 217.971296][ T31] ret_from_fork+0x9d/0x170
[ 217.971301][ T31] ? __pfx_kthread+0x10/0x10
[ 217.971304][ T31] ret_from_fork_asm+0x1a/0x30
[ 217.971314][ T31]
[ 217.971315][ T31] Sending NMI from CPU 1 to CPUs 0:
[ 218.067931][ C0] NMI backtrace for cpu 0
[ 218.067936][ C0] CPU: 0 UID: 0 PID: 3487 Comm: syz-executor.0 Not tainted 6.16.0-rc3-syzkaller #0 PREEMPT(undef)
[ 218.067940][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
[ 218.067942][ C0] RIP: 0010:check_preemption_disabled+0x5c/0x120
[ 218.067950][ C0] Code: 50 9a 01 48 3b 4c 24 08 0f 85 cc 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d e9 81 09 01 00 cc 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 c8 65 4c 8b 3c 25 08 e0 33 84 41 f6 47 2f
[ 218.067953][ C0] RSP: 0018:ffffc90001e5fd88 EFLAGS: 00000046
[ 218.067956][ C0] RAX: 0000000000000000 RBX: 0000000000000283 RCX: 0000000080000000
[ 218.067958][ C0] RDX: 722a1d7888dd9172 RSI: ffffffff832c0809 RDI: ffffffff831f3ec6
[ 218.067960][ C0] RBP: ffff8881082ac148 R08: 0000000000000000 R09: 00000000000000a5
[ 218.067961][ C0] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000001
[ 218.067963][ C0] R13: 0000000000000000 R14: ffffffff83617978 R15: ffff8881082ab700
[ 218.067965][ C0] FS: 000055558c969480(0000) GS:ffff8882b38d6000(0000) knlGS:0000000000000000
[ 218.067966][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 218.067968][ C0] CR2: 000055558c982898 CR3: 00000001093cc000 CR4: 00000000003506f0
[ 218.067974][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 218.067975][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 218.067976][ C0] Call Trace:
[ 218.067978][ C0]
[ 218.067981][ C0] lock_release+0x20f/0x2f0
[ 218.067988][ C0] ? kmem_cache_alloc_noprof+0x4b/0x3d0
[ 218.067994][ C0] kmem_cache_alloc_noprof+0x4b/0x3d0
[ 218.067997][ C0] ? getname_flags+0x42/0x1e0
[ 218.068003][ C0] getname_flags+0x42/0x1e0
[ 218.068007][ C0] user_path_at+0x1c/0xa0
[ 218.068011][ C0] __x64_sys_umount+0x4d/0x80
[ 218.068016][ C0] do_syscall_64+0x8f/0x250
[ 218.068020][ C0] ? clear_bhb_loop+0x40/0x90
[ 218.068025][ C0] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 218.068028][ C0] RIP: 0033:0x7f3348c7e217
[ 218.068030][ C0] Code: b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 01 c3 48 c7 c2 b0 ff ff ff f7 d8 64 89 02 b8
[ 218.068032][ C0] RSP: 002b:00007ffe22ce0b38 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 218.068035][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f3348c7e217
[ 218.068037][ C0] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffe22ce0bf0
[ 218.068038][ C0] RBP: 00007ffe22ce0bf0 R08: 0000000000000000 R09: 0000000000000000
[ 218.068039][ C0] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffe22ce1ce0
[ 218.068041][ C0] R13: 00007f3348cc8336 R14: 00000000000353a3 R15: 000000000000000b
[ 218.068045][ C0]
[ 218.068945][ T31] Kernel panic - not syncing: hung_task: blocked tasks
[ 218.342792][ T31] Kernel Offset: disabled
[ 218.347105][ T31] Rebooting in 86400 seconds..