./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor996469569
<...>
forked to background, child pid 4637
no interfaces have a carrier
[ 42.361767][ T4638] 8021q: adding VLAN 0 to HW filter on device bond0
[ 42.375004][ T4638] eql: remember to turn off Van-Jacobson compression on your slave devices
Starting sshd: OK
syzkaller
Warning: Permanently added '10.128.0.83' (ECDSA) to the list of known hosts.
execve("./syz-executor996469569", ["./syz-executor996469569"], 0x7fff10f491a0 /* 10 vars */) = 0
brk(NULL) = 0x555556f2e000
brk(0x555556f2ec40) = 0x555556f2ec40
arch_prctl(ARCH_SET_FS, 0x555556f2e300) = 0
uname({sysname="Linux", nodename="syzkaller", ...}) = 0
readlink("/proc/self/exe", "/root/syz-executor996469569", 4096) = 27
brk(0x555556f4fc40) = 0x555556f4fc40
brk(0x555556f50000) = 0x555556f50000
mprotect(0x7fada4fa3000, 16384, PROT_READ) = 0
mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000
mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000
mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000
openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 3
ioctl(3, LOOP_CLR_FD) = -1 ENXIO (No such device or address)
close(3) = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x555556f2e5d0) = 5065
./strace-static-x86_64: Process 5065 attached
[pid 5065] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid 5065] setpgid(0, 0) = 0
[pid 5065] openat(AT_FDCWD, "/proc/self/oom_score_adj", O_WRONLY|O_CLOEXEC) = 3
[pid 5065] write(3, "1000", 4) = 4
[pid 5065] close(3) = 0
[pid 5065] memfd_create("syzkaller", 0) = 3
[pid 5065] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7fad9cae8000
[pid 5065] write(3, "\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00"..., 2097152) = 2097152
[pid 5065] munmap(0x7fad9cae8000, 2097152) = 0
[pid 5065] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid 5065] ioctl(4, LOOP_SET_FD, 3) = 0
[pid 5065] close(3) = 0
[pid 5065] mkdir("./file0", 0777) = 0
syzkaller login: [ 69.225840][ T5065] loop0: detected capacity change from 0 to 4096
[ 69.249184][ T5065] NILFS (loop0): invalid segment: Checksum error in segment payload
[ 69.257396][ T5065] NILFS (loop0): trying rollback from an earlier position
[pid 5065] mount("/dev/loop0", "./file0", "nilfs2", MS_NODEV|MS_NOATIME|MS_NODIRATIME, "") = 0
[pid 5065] openat(AT_FDCWD, "./file0", O_RDONLY|O_DIRECTORY) = 3
[pid 5065] chdir("./file0") = 0
[pid 5065] ioctl(4, LOOP_CLR_FD) = 0
[pid 5065] close(4) = 0
[pid 5065] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW|O_NOATIME|O_CLOEXEC, 000) = 4
[pid 5065] open("./bus", O_RDONLY) = 5
[ 69.273881][ T5065] NILFS (loop0): recovery complete
[ 69.281123][ T5067] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[ 69.306132][ T27] audit: type=1804 audit(1676362207.778:2): pid=5065 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=open_writers comm="syz-executor996" name="/root/file0/bus" dev="loop0" ino=12 res=1 errno=0
[pid 5065] ioctl(5, NILFS_IOCTL_RESIZE, 0x20000140) = 0
[pid 5065] open("./bus", O_RDWR|O_CREAT|O_NOCTTY|O_TRUNC|O_NONBLOCK|O_LARGEFILE|O_NOFOLLOW|O_NOATIME|O_CLOEXEC, 000) = 6
[ 69.333021][ T5065] NILFS (loop0): unable to move secondary superblock to block 18446744073709551612
[ 69.346874][ T27] audit: type=1804 audit(1676362207.818:3): pid=5065 uid=0 auid=4294967295 ses=4294967295 subj=_ op=invalid_pcr cause=ToMToU comm="syz-executor996" name="/root/file0/bus" dev="loop0" ino=12 res=1 errno=0
[pid 5065] ioctl(6, NILFS_IOCTL_RESIZE <unfinished ...>
[pid 5064] kill(-5065, SIGKILL) = 0
[pid 5064] kill(5065, SIGKILL) = 0
[pid 5064] openat(AT_FDCWD, "/sys/fs/fuse/connections", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
[pid 5064] fstat(3, {st_mode=S_IFDIR|0755, st_size=0, ...}) = 0
[pid 5064] getdents64(3, 0x555556f2f620 /* 2 entries */, 32768) = 48
[pid 5064] getdents64(3, 0x555556f2f620 /* 0 entries */, 32768) = 0
[pid 5064] close(3) = 0
[ 81.415743][ T1920] cfg80211: failed to load regulatory.db
[ 286.223585][ T28] INFO: task segctord:5067 blocked for more than 143 seconds.
[ 286.231497][ T28] Not tainted 6.2.0-rc8-syzkaller-00015-gf6feea56f66d #0
[ 286.253754][ T28] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
[ 286.262482][ T28] task:segctord state:D stack:23456 pid:5067 ppid:2 flags:0x00004000
[ 286.281062][ T28] Call Trace:
[ 286.284441][ T28] <TASK>
[ 286.287412][ T28] __schedule+0x1409/0x43f0
[ 286.293717][ T28] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 286.303692][ T28] ? release_firmware_map_entry+0x190/0x190
[ 286.309654][ T28] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0
[ 286.315728][ T28] ? print_irqtrace_events+0x220/0x220
[ 286.321242][ T28] ? _raw_spin_lock_irq+0xdf/0x120
[ 286.326533][ T28] ? do_raw_spin_unlock+0x13b/0x8b0
[ 286.331782][ T28] schedule+0xc3/0x190
[ 286.335948][ T28] rwsem_down_write_slowpath+0xfcf/0x14a0
[ 286.341750][ T28] ? rwsem_down_read_slowpath+0x950/0x950
[ 286.347677][ T28] ? read_lock_is_recursive+0x20/0x20
[ 286.353122][ T28] ? nilfs_segctor_thread+0x4e2/0x1140
[ 286.360539][ T28] nilfs_transaction_lock+0x25c/0x4f0
[ 286.366604][ T28] nilfs_segctor_thread+0x52f/0x1140
[ 286.371990][ T28] ? nilfs_construction_timeout+0x40/0x40
[ 286.378229][ T28] ? _raw_spin_unlock_irqrestore+0xdd/0x140
[ 286.384587][ T28] ? _raw_spin_unlock+0x40/0x40
[ 286.389508][ T28] ? wake_bit_function+0x220/0x220
[ 286.395155][ T28] ? _raw_spin_unlock+0x40/0x40
[ 286.400061][ T28] ? lockdep_hardirqs_on_prepare+0x43c/0x7a0
[ 286.406659][ T28] ? __kthread_parkme+0x164/0x1c0
[ 286.411787][ T28] kthread+0x270/0x300
[ 286.416483][ T28] ? nilfs_construction_timeout+0x40/0x40
[ 286.422261][ T28] ? kthread_blkcg+0xd0/0xd0
[ 286.427388][ T28] ret_from_fork+0x1f/0x30
[ 286.431893][ T28] </TASK>
[ 286.435841][ T28]
[ 286.435841][ T28] Showing all locks held in the system:
[ 286.444078][ T28] 1 lock held by rcu_tasks_kthre/12:
[ 286.449404][ T28] #0: ffffffff8cf258d0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
[ 286.460355][ T28] 1 lock held by rcu_tasks_trace/13:
[ 286.466015][ T28] #0: ffffffff8cf260d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
[ 286.477687][ T28] 1 lock held by khungtaskd/28:
[ 286.482575][ T28] #0: ffffffff8cf25700 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
[ 286.492404][ T28] 2 locks held by getty/4745:
[ 286.497394][ T28] #0: ffff88802c2eb098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70
[ 286.507503][ T28] #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6ab/0x1db0
[ 286.517997][ T28] 3 locks held by syz-executor996/5065:
[ 286.523848][ T28] 1 lock held by segctord/5067:
[ 286.528729][ T28] #0: ffff888017ce92a0 (&nilfs->ns_segctor_sem){++++}-{3:3}, at: nilfs_transaction_lock+0x25c/0x4f0
[ 286.540425][ T28]
[ 286.542798][ T28] =============================================
[ 286.542798][ T28]
[ 286.551730][ T28] NMI backtrace for cpu 1
[ 286.556096][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc8-syzkaller-00015-gf6feea56f66d #0
[ 286.565931][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
[ 286.576016][ T28] Call Trace:
[ 286.579321][ T28] <TASK>
[ 286.582281][ T28] dump_stack_lvl+0x1e7/0x2d0
[ 286.587026][ T28] ? nf_tcp_handle_invalid+0x640/0x640
[ 286.592527][ T28] ? panic+0x770/0x770
[ 286.596631][ T28] ? tick_nohz_tick_stopped+0x7b/0xb0
[ 286.602044][ T28] ? nmi_cpu_backtrace+0x256/0x560
[ 286.607210][ T28] nmi_cpu_backtrace+0x4e5/0x560
[ 286.612191][ T28] ? vprintk_emit+0x10d/0x1f0
[ 286.616907][ T28] ? nmi_trigger_cpumask_backtrace+0x3f0/0x3f0
[ 286.623102][ T28] ? _printk+0xd5/0x120
[ 286.627297][ T28] ? panic+0x770/0x770
[ 286.631407][ T28] ? __wake_up_klogd+0xcc/0x100
[ 286.636307][ T28] ? panic+0x770/0x770
[ 286.640417][ T28] ? nmi_trigger_cpumask_backtrace+0xe6/0x3f0
[ 286.646530][ T28] ? arch_trigger_cpumask_backtrace+0x10/0x10
[ 286.652645][ T28] nmi_trigger_cpumask_backtrace+0x1b4/0x3f0
[ 286.658677][ T28] watchdog+0xf70/0xfb0
[ 286.663066][ T28] kthread+0x270/0x300
[ 286.667171][ T28] ? hungtask_pm_notify+0x90/0x90
[ 286.672232][ T28] ? kthread_blkcg+0xd0/0xd0
[ 286.676882][ T28] ret_from_fork+0x1f/0x30
[ 286.681357][ T28] </TASK>
[ 286.684546][ T28] Sending NMI from CPU 1 to CPUs 0:
[ 286.689783][ C0] NMI backtrace for cpu 0
[ 286.689794][ C0] CPU: 0 PID: 5065 Comm: syz-executor996 Not tainted 6.2.0-rc8-syzkaller-00015-gf6feea56f66d #0
[ 286.689812][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
[ 286.689822][ C0] RIP: 0010:lock_release+0x333/0xaa0
[ 286.689852][ C0] Code: 00 f0 ff 42 0f b6 04 3b 84 c0 0f 85 7e 05 00 00 45 89 2e 41 81 fd ff ff 0f 00 0f 87 ff 02 00 00 48 8b 44 24 40 42 0f b6 04 38 <84> c0 0f 85 34 05 00 00 89 16 4c 89 e0 48 c1 e8 03 42 80 3c 38 00
[ 286.689866][ C0] RSP: 0018:ffffc90003def1c0 EFLAGS: 00000087
[ 286.689880][ C0] RAX: 0000000000000000 RBX: 1ffff11004d808aa RCX: ffffc90003def203
[ 286.689893][ C0] RDX: 0000000000000003 RSI: ffff888026c044b0 RDI: ffff888026c04530
[ 286.689904][ C0] RBP: ffffc90003def2f0 R08: dffffc0000000000 R09: fffffbfff1ca4ece
[ 286.689916][ C0] R10: 0000000000000000 R11: dffffc0000000001 R12: ffff888026c04530
[ 286.689927][ C0] R13: 0000000000020021 R14: ffff888026c04550 R15: dffffc0000000000
[ 286.689939][ C0] FS: 0000555556f2e300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
[ 286.689954][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 286.689965][ C0] CR2: 000056435c9b6680 CR3: 000000001e10a000 CR4: 00000000003506f0
[ 286.689979][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 286.689988][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 286.689998][ C0] Call Trace:
[ 286.690003][ C0] <TASK>
[ 286.690012][ C0] ? rcu_lock_release+0x5/0x30
[ 286.690037][ C0] ? __lock_acquire+0x1f80/0x1f80
[ 286.690066][ C0] ? workingset_activation+0x55d/0x820
[ 286.690093][ C0] folio_mark_accessed+0x51c/0xf00
[ 286.690123][ C0] nilfs_grab_buffer+0x3d3/0x540
[ 286.690143][ C0] nilfs_mdt_submit_block+0xd7/0x8f0
[ 286.690161][ C0] ? lockdep_hardirqs_on+0x98/0x140
[ 286.690189][ C0] ? nilfs_mdt_clear_shadow_map+0x290/0x290
[ 286.690209][ C0] ? nilfs_mdt_read_block+0xfb/0x430
[ 286.690226][ C0] ? nilfs_mdt_read_block+0x420/0x430
[ 286.690246][ C0] nilfs_mdt_read_block+0xeb/0x430
[ 286.690265][ C0] ? nilfs_mdt_get_block+0xbb0/0xbb0
[ 286.690285][ C0] ? mark_lock+0x9a/0x340
[ 286.690303][ C0] nilfs_mdt_get_block+0x12d/0xbb0
[ 286.690320][ C0] ? print_irqtrace_events+0x220/0x220
[ 286.690352][ C0] ? PageUptodate+0x290/0x290
[ 286.690371][ C0] ? nilfs_mdt_read_block+0xfb/0x430
[ 286.690391][ C0] nilfs_sufile_resize+0x7a3/0x12b0
[ 286.690419][ C0] ? nilfs_sufile_do_set_error+0x540/0x540
[ 286.690438][ C0] ? clear_nonspinnable+0x60/0x60
[ 286.690468][ C0] nilfs_resize_fs+0x20c/0xed0
[ 286.690496][ C0] ? __lock_acquire+0x1f80/0x1f80
[ 286.690525][ C0] ? nilfs_cleanup_super+0x6b0/0x6b0
[ 286.690551][ C0] ? __might_fault+0xba/0x120
[ 286.690573][ C0] nilfs_ioctl+0x137c/0x2440
[ 286.690596][ C0] ? rcu_lock_release+0x5/0x30
[ 286.690618][ C0] ? rcu_read_lock_sched_held+0x8d/0x130
[ 286.690643][ C0] ? nilfs_ioctl_prepare_clean_segments+0x880/0x880
[ 286.690670][ C0] ? do_vfs_ioctl+0x1c09/0x2af0
[ 286.690691][ C0] ? __x64_compat_sys_ioctl+0x90/0x90
[ 286.690710][ C0] ? __lock_acquire+0x1f80/0x1f80
[ 286.690734][ C0] ? lockdep_hardirqs_on+0x98/0x140
[ 286.690770][ C0] ? __kmem_cache_free+0x264/0x3c0
[ 286.690792][ C0] ? tomoyo_path_number_perm+0x663/0x840
[ 286.690816][ C0] ? tomoyo_path_number_perm+0x6e4/0x840
[ 286.690838][ C0] ? __bpf_trace_rcu_stall_warning+0x10/0x10
[ 286.690866][ C0] ? smack_log+0x123/0x540
[ 286.690890][ C0] ? tomoyo_check_path_acl+0x1c0/0x1c0
[ 286.690914][ C0] ? smk_access+0x480/0x480
[ 286.690939][ C0] ? smk_access+0x44f/0x480
[ 286.690966][ C0] ? smk_tskacc+0x2fa/0x360
[ 286.690993][ C0] ? smack_file_ioctl+0x295/0x390
[ 286.691015][ C0] ? smack_file_alloc_security+0xd0/0xd0
[ 286.691040][ C0] ? do_notify_parent+0xf60/0xf60
[ 286.691067][ C0] ? print_irqtrace_events+0x220/0x220
[ 286.691094][ C0] ? bpf_lsm_file_ioctl+0x9/0x10
[ 286.691110][ C0] ? security_file_ioctl+0x81/0xa0
[ 286.691132][ C0] ? nilfs_ioctl_prepare_clean_segments+0x880/0x880
[ 286.691155][ C0] __se_sys_ioctl+0xf1/0x160
[ 286.691174][ C0] do_syscall_64+0x41/0xc0
[ 286.691195][ C0] entry_SYSCALL_64_after_hwframe+0x63/0xcd
[ 286.691222][ C0] RIP: 0033:0x7fada4f355f9
[ 286.691242][ C0] Code: Unable to access opcode bytes at 0x7fada4f355cf.
[ 286.691250][ C0] RSP: 002b:00007ffdc80a3908 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 286.691266][ C0] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fada4f355f9
[ 286.691277][ C0] RDX: 0000000020000040 RSI: 0000000040086e8b RDI: 0000000000000006
[ 286.691287][ C0] RBP: 0000000000000000 R08: 00007fada4fa3ec0 R09: 00007fada4fa3ec0
[ 286.691298][ C0] R10: 00007fada4fa3ec0 R11: 0000000000000246 R12: 00007ffdc80a3930
[ 286.691309][ C0] R13: 0000000000000000 R14: 431bde82d7b634db R15: 0000000000000000
[ 286.691327][ C0] </TASK>
[ 286.691333][ C0] INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.549 msecs
[ 286.692536][ T28] Kernel panic - not syncing: hung_task: blocked tasks
[ 287.179473][ T28] CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc8-syzkaller-00015-gf6feea56f66d #0
[ 287.189312][ T28] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
[ 287.199407][ T28] Call Trace:
[ 287.202736][ T28] <TASK>
[ 287.205700][ T28] dump_stack_lvl+0x1e7/0x2d0
[ 287.210531][ T28] ? nf_tcp_handle_invalid+0x640/0x640
[ 287.216028][ T28] ? panic+0x770/0x770
[ 287.220136][ T28] ? vscnprintf+0x5d/0x80
[ 287.224508][ T28] panic+0x31c/0x770
[ 287.228436][ T28] ? schedule_preempt_disabled+0x20/0x20
[ 287.234107][ T28] ? nmi_trigger_cpumask_backtrace+0x2c5/0x3f0
[ 287.240304][ T28] ? memcpy_page_flushcache+0x100/0x100
[ 287.245896][ T28] ? nmi_trigger_cpumask_backtrace+0x2c5/0x3f0
[ 287.252091][ T28] ? nmi_trigger_cpumask_backtrace+0x33e/0x3f0
[ 287.258297][ T28] ? nmi_trigger_cpumask_backtrace+0x343/0x3f0
[ 287.264513][ T28] watchdog+0xfae/0xfb0
[ 287.268723][ T28] kthread+0x270/0x300
[ 287.272820][ T28] ? hungtask_pm_notify+0x90/0x90
[ 287.277881][ T28] ? kthread_blkcg+0xd0/0xd0
[ 287.282500][ T28] ret_from_fork+0x1f/0x30
[ 287.286976][ T28] </TASK>
[ 287.290363][ T28] Kernel Offset: disabled
[ 287.294797][ T28] Rebooting in 86400 seconds..