syzkaller
syzkaller login: [ 26.675566][ T1567] cgroup: Unknown subsys name 'net'
[ 26.676863][ T1567] cgroup: Unknown subsys name 'net_prio'
[ 26.678242][ T1567] cgroup: Unknown subsys name 'devices'
[ 26.680069][ T1567] cgroup: Unknown subsys name 'blkio'
[ 26.796400][ T1567] cgroup: Unknown subsys name 'hugetlb'
[ 26.802181][ T1567] cgroup: Unknown subsys name 'rlimit'
[ 27.819410][ T1567] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
Warning: Permanently added '10.128.1.79' (ED25519) to the list of known hosts.
2025/04/24 10:36:33 ignoring optional flag "sandboxArg"="0"
2025/04/24 10:36:33 parsed 1 programs
[ 50.706533][ T2418] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k
2025/04/24 10:36:36 executed programs: 0
[ 53.487439][ T3239] loop3: detected capacity change from 0 to 8
[ 54.321498][ T24] audit: type=1800 audit(1745490998.770:2): pid=3239 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.3.16" name="file2" dev="loop3" ino=6 res=0 errno=0
[ 65.025813][ T570] cfg80211: failed to load regulatory.db
2025/04/24 10:36:54 executed programs: 4
[ 70.316532][ T3623] loop4: detected capacity change from 0 to 8
[ 71.150384][ T24] audit: type=1800 audit(1745491015.600:3): pid=3623 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.4.18" name="file2" dev="loop4" ino=6 res=0 errno=0
2025/04/24 10:37:11 executed programs: 6
[ 87.156211][ T4009] loop5: detected capacity change from 0 to 8
[ 87.988972][ T24] audit: type=1800 audit(1745491032.440:4): pid=4009 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.5.20" name="file2" dev="loop5" ino=6 res=0 errno=0
2025/04/24 10:37:28 executed programs: 8
[ 103.990090][ T4394] loop6: detected capacity change from 0 to 8
[ 104.823507][ T24] audit: type=1800 audit(1745491049.270:5): pid=4394 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.6.22" name="file2" dev="loop6" ino=6 res=0 errno=0
2025/04/24 10:37:45 executed programs: 10
[ 120.808357][ T4777] loop7: detected capacity change from 0 to 8
[ 121.642282][ T24] audit: type=1800 audit(1745491066.090:6): pid=4777 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.7.24" name="file2" dev="loop7" ino=6 res=0 errno=0
2025/04/24 10:38:02 executed programs: 12
[ 137.621214][ T5160] loop8: detected capacity change from 0 to 8
[ 138.455364][ T24] audit: type=1800 audit(1745491082.900:7): pid=5160 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.8.26" name="file2" dev="loop8" ino=6 res=0 errno=0
2025/04/24 10:38:18 executed programs: 14
[ 154.432927][ T5543] loop9: detected capacity change from 0 to 8
[ 155.266940][ T24] audit: type=1800 audit(1745491099.720:8): pid=5543 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.9.28" name="file2" dev="loop9" ino=6 res=0 errno=0
2025/04/24 10:38:35 executed programs: 16
[ 171.247763][ T5926] loop0: detected capacity change from 0 to 8
[ 172.081171][ T24] audit: type=1800 audit(1745491116.530:9): pid=5926 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.0.30" name="file2" dev="loop0" ino=6 res=0 errno=0
2025/04/24 10:38:52 executed programs: 18
[ 188.076645][ T6309] loop1: detected capacity change from 0 to 8
[ 188.909990][ T24] audit: type=1800 audit(1745491133.360:10): pid=6309 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.1.32" name="file2" dev="loop1" ino=6 res=0 errno=0
2025/04/24 10:39:09 executed programs: 20
[ 204.892023][ T6692] loop2: detected capacity change from 0 to 8
[ 205.726366][ T24] audit: type=1800 audit(1745491150.180:11): pid=6692 uid=0 auid=4294967295 ses=4294967295 subj=unconfined op=collect_data cause=failed comm="syz.2.34" name="file2" dev="loop2" ino=6 res=0 errno=0
[ 210.945474][ T26] INFO: task syz-executor:2855 blocked for more than 143 seconds.
[ 210.953286][ T26] Not tainted 5.15.180-syzkaller #0
[ 210.959006][ T26] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 210.967760][ T26] task:syz-executor state:D stack:11840 pid: 2855 ppid: 1 flags:0x00004004
[ 210.976952][ T26] Call Trace:
[ 210.980218][ T26]
[ 210.983126][ T26] __schedule+0x378/0x13e0
[ 210.987567][ T26] ? find_held_lock+0x2b/0x80
[ 210.992231][ T26] schedule+0x68/0xb0
[ 210.996206][ T26] io_schedule+0x3d/0x60
[ 211.000601][ T26] wait_on_page_bit_common+0x114/0x470
[ 211.006053][ T26] ? find_get_entries+0x18d/0x300
[ 211.011065][ T26] ? file_fdatawait_range+0x20/0x20
[ 211.016255][ T26] truncate_inode_pages_range+0x28a/0x530
[ 211.021964][ T26] ? __lock_acquire.constprop.0+0x4c/0x3e0
[ 211.027791][ T26] evict+0x28d/0x2b0
[ 211.031705][ T26] ? fsnotify_destroy_marks+0x23/0x1d0
[ 211.037167][ T26] dispose_list+0x43/0x60
[ 211.041500][ T26] evict_inodes+0x16b/0x1b0
[ 211.045995][ T26] generic_shutdown_super+0x2d/0x120
[ 211.051293][ T26] kill_block_super+0x1c/0x40
[ 211.055977][ T26] deactivate_locked_super+0x27/0x90
[ 211.061420][ T26] cleanup_mnt+0x10b/0x150
[ 211.065871][ T26] task_work_run+0x54/0x80
[ 211.070270][ T26] exit_to_user_mode_prepare+0x15d/0x160
[ 211.075924][ T26] syscall_exit_to_user_mode+0x12/0x30
[ 211.081374][ T26] do_syscall_64+0x40/0x80
[ 211.085892][ T26] entry_SYSCALL_64_after_hwframe+0x66/0xd0
[ 211.091790][ T26] RIP: 0033:0x7f24e899a0d7
[ 211.096229][ T26] RSP: 002b:00007ffccf3fc448 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[ 211.104618][ T26] RAX: 0000000000000000 RBX: 00007f24e8a1a08c RCX: 00007f24e899a0d7
[ 211.112798][ T26] RDX: 0000000000000000 RSI: 0000000000000009 RDI: 00007ffccf3fc500
[ 211.120808][ T26] RBP: 00007ffccf3fc500 R08: 0000000000000000 R09: 0000000000000000
[ 211.129143][ T26] R10: 00000000ffffffff R11: 0000000000000246 R12: 00007ffccf3fd590
[ 211.137241][ T26] R13: 00007f24e8a1a08c R14: 000000000000d42b R15: 00007ffccf3fd5d0
[ 211.145275][ T26]
[ 211.148306][ T26]
[ 211.148306][ T26] Showing all locks held in the system:
[ 211.156018][ T26] 1 lock held by khungtaskd/26:
[ 211.160840][ T26] #0: ffffffff837dc340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x15/0xf7
[ 211.170566][ T26] 2 locks held by getty/1477:
[ 211.175242][ T26] #0: ffff888100c0c098 (&tty->ldisc_sem){....}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x50
[ 211.184962][ T26] #1: ffffc900032572e8 (&ldata->atomic_read_lock){....}-{3:3}, at: n_tty_read+0x4eb/0x610
[ 211.194946][ T26] 1 lock held by syz-executor/2855:
[ 211.200130][ T26] #0: ffff88810a2eb0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.210363][ T26] 1 lock held by syz-executor/3243:
[ 211.215555][ T26] #0: ffff88810c3bf0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.225703][ T26] 1 lock held by syz-executor/3629:
[ 211.230868][ T26] #0: ffff88811508c0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.241180][ T26] 1 lock held by syz-executor/4014:
[ 211.246365][ T26] #0: ffff88811eb060e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.256532][ T26] 1 lock held by syz-executor/4397:
[ 211.261825][ T26] #0: ffff88811f3220e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.272122][ T26] 1 lock held by syz-executor/4780:
[ 211.277306][ T26] #0: ffff88810b6c90e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.287559][ T26] 1 lock held by syz-executor/5163:
[ 211.292753][ T26] #0: ffff88811efd40e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.302903][ T26] 1 lock held by syz-executor/5546:
[ 211.308105][ T26] #0: ffff88811f7bb0e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.318244][ T26] 1 lock held by syz-executor/5929:
[ 211.323416][ T26] #0: ffff88811f8700e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.333595][ T26] 1 lock held by syz-executor/6312:
[ 211.338777][ T26] #0: ffff88811fe550e0 (&type->s_umount_key#48){....}-{3:3}, at: deactivate_super+0x27/0x30
[ 211.349206][ T26]
[ 211.351512][ T26] =============================================
[ 211.351512][ T26]
[ 211.359927][ T26] NMI backtrace for cpu 0
[ 211.364250][ T26] CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.180-syzkaller #0
[ 211.372194][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
[ 211.382216][ T26] Call Trace:
[ 211.385487][ T26]
[ 211.388393][ T26] dump_stack_lvl+0x41/0x5e
[ 211.392867][ T26] nmi_cpu_backtrace.cold+0x32/0x80
[ 211.398036][ T26] ? lapic_can_unplug_cpu+0x80/0x80
[ 211.403201][ T26] nmi_trigger_cpumask_backtrace+0x91/0xb0
[ 211.408982][ T26] watchdog+0x4a2/0x4e0
[ 211.413108][ T26] ? proc_dohung_task_timeout_secs+0x30/0x30
[ 211.419056][ T26] kthread+0x124/0x150
[ 211.423103][ T26] ? set_kthread_struct+0x40/0x40
[ 211.428112][ T26] ret_from_fork+0x1f/0x30
[ 211.432500][ T26]
[ 211.435551][ T26] Sending NMI from CPU 0 to CPUs 1:
[ 211.440809][ C1] NMI backtrace for cpu 1 skipped: idling at default_idle+0xb/0x10
[ 211.441812][ T26] Kernel panic - not syncing: hung_task: blocked tasks
[ 211.456051][ T26] Kernel Offset: disabled
[ 211.460363][ T26] Rebooting in 86400 seconds..