./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor2921513681

<...>
Warning: Permanently added '10.128.0.237' (ED25519) to the list of known hosts.
execve("./syz-executor2921513681", ["./syz-executor2921513681"], 0x7ffd56d159c0 /* 10 vars */) = 0
brk(NULL)                               = 0x55558213b000
brk(0x55558213bd00)                     = 0x55558213bd00
arch_prctl(ARCH_SET_FS, 0x55558213b380) = 0
set_tid_address(0x55558213b650)         = 5819
set_robust_list(0x55558213b660, 24)     = 0
rseq(0x55558213bca0, 0x20, 0, 0x53053053) = 0
prlimit64(0, RLIMIT_STACK, NULL, {rlim_cur=8192*1024, rlim_max=RLIM64_INFINITY}) = 0
readlink("/proc/self/exe", "/root/syz-executor2921513681", 4096) = 28
getrandom("\xf4\xc1\x3f\x95\x83\x2e\x35\x2c", 8, GRND_NONBLOCK) = 8
brk(NULL)                               = 0x55558213bd00
brk(0x55558215cd00)                     = 0x55558215cd00
brk(0x55558215d000)                     = 0x55558215d000
mprotect(0x7f74021d7000, 16384, PROT_READ) = 0
mmap(0x1ffffffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffffffff000
mmap(0x200000000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200000000000
mmap(0x200001000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x200001000000
unshare(CLONE_NEWPID)                   = 0
clone(child_stack=NULL, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x55558213b650) = 5820
./strace-static-x86_64: Process 5820 attached
[pid  5820] set_robust_list(0x55558213b660, 24) = 0
[pid  5820] prctl(PR_SET_PDEATHSIG, SIGKILL) = 0
[pid  5820] getppid()                   = 0
[pid  5820] prlimit64(0, RLIMIT_AS, {rlim_cur=204800*1024, rlim_max=204800*1024}, NULL) = 0
[pid  5820] prlimit64(0, RLIMIT_MEMLOCK, {rlim_cur=32768*1024, rlim_max=32768*1024}, NULL) = 0
[pid  5820] prlimit64(0, RLIMIT_FSIZE, {rlim_cur=139264*1024, rlim_max=139264*1024}, NULL) = 0
[pid  5820] prlimit64(0, RLIMIT_STACK, {rlim_cur=1024*1024, rlim_max=1024*1024}, NULL) = 0
[pid  5820] prlimit64(0, RLIMIT_CORE, {rlim_cur=131072*1024, rlim_max=131072*1024}, NULL) = 0
[pid  5820] prlimit64(0, RLIMIT_NOFILE, {rlim_cur=256, rlim_max=256}, NULL) = 0
[pid  5820] unshare(CLONE_NEWNS)        = 0
[pid  5820] mount(NULL, "/", NULL, MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] unshare(CLONE_NEWIPC)       = 0
[pid  5820] unshare(CLONE_NEWCGROUP)    = 0
[pid  5820] unshare(CLONE_NEWUTS)       = 0
[pid  5820] unshare(CLONE_SYSVSEM)      = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/shmmax", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "16777216", 8)     = 8
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/shmall", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "536870912", 9)    = 9
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/shmmni", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "1024", 4)         = 4
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/msgmax", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "8192", 4)         = 4
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/msgmni", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "1024", 4)         = 4
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/msgmnb", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "1024", 4)         = 4
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/kernel/sem", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "1024 1048576 500 1024", 21) = 21
[pid  5820] close(3)                    = 0
[pid  5820] getpid()                    = 1
[pid  5820] capget({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PTRACE|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_NICE|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  5820] capset({version=_LINUX_CAPABILITY_VERSION_3, pid=1}, {effective=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, permitted=1<<CAP_CHOWN|1<<CAP_DAC_OVERRIDE|1<<CAP_DAC_READ_SEARCH|1<<CAP_FOWNER|1<<CAP_FSETID|1<<CAP_KILL|1<<CAP_SETGID|1<<CAP_SETUID|1<<CAP_SETPCAP|1<<CAP_LINUX_IMMUTABLE|1<<CAP_NET_BIND_SERVICE|1<<CAP_NET_BROADCAST|1<<CAP_NET_ADMIN|1<<CAP_NET_RAW|1<<CAP_IPC_LOCK|1<<CAP_IPC_OWNER|1<<CAP_SYS_MODULE|1<<CAP_SYS_RAWIO|1<<CAP_SYS_CHROOT|1<<CAP_SYS_PACCT|1<<CAP_SYS_ADMIN|1<<CAP_SYS_BOOT|1<<CAP_SYS_RESOURCE|1<<CAP_SYS_TIME|1<<CAP_SYS_TTY_CONFIG|1<<CAP_MKNOD|1<<CAP_LEASE|1<<CAP_AUDIT_WRITE|1<<CAP_AUDIT_CONTROL|1<<CAP_SETFCAP|1<<CAP_MAC_OVERRIDE|1<<CAP_MAC_ADMIN|1<<CAP_SYSLOG|1<<CAP_WAKE_ALARM|1<<CAP_BLOCK_SUSPEND|1<<CAP_AUDIT_READ|1<<CAP_PERFMON|1<<CAP_BPF|1<<CAP_CHECKPOINT_RESTORE, inheritable=0}) = 0
[pid  5820] unshare(CLONE_NEWNET)       = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/net/ipv4/ping_group_range", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "0 65535", 7)      = 7
[pid  5820] close(3)                    = 0
[pid  5820] openat(AT_FDCWD, "/proc/sys/fs/mount-max", O_WRONLY|O_CLOEXEC) = 3
[pid  5820] write(3, "100000", 6)       = 6
[pid  5820] close(3)                    = 0
[pid  5820] mkdir("./syz-tmp", 0777)    = 0
[pid  5820] mount("", "./syz-tmp", "tmpfs", 0, NULL) = 0
[pid  5820] mkdir("./syz-tmp/newroot", 0777) = 0
[pid  5820] mkdir("./syz-tmp/newroot/dev", 0700) = 0
[pid  5820] mount("/dev", "./syz-tmp/newroot/dev", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] mkdir("./syz-tmp/newroot/proc", 0700) = 0
[pid  5820] mount("syz-proc", "./syz-tmp/newroot/proc", "proc", 0, NULL) = 0
[pid  5820] mkdir("./syz-tmp/newroot/selinux", 0700) = 0
[pid  5820] mount("/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5820] mount("/sys/fs/selinux", "./syz-tmp/newroot/selinux", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5820] mkdir("./syz-tmp/newroot/sys", 0700) = 0
[pid  5820] mount("/sys", "./syz-tmp/newroot/sys", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] mount("/sys/kernel/debug", "./syz-tmp/newroot/sys/kernel/debug", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] mount("/sys/fs/smackfs", "./syz-tmp/newroot/sys/fs/smackfs", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] mount("/proc/sys/fs/binfmt_misc", "./syz-tmp/newroot/proc/sys/fs/binfmt_misc", NULL, MS_BIND|MS_REC|MS_PRIVATE, NULL) = 0
[pid  5820] mkdir("./syz-tmp/newroot/syz-inputs", 0700) = 0
[pid  5820] mount("/syz-inputs", "./syz-tmp/newroot/syz-inputs", NULL, MS_RDONLY|MS_BIND|MS_REC|MS_PRIVATE, NULL) = -1 ENOENT (No such file or directory)
[pid  5820] mkdir("./syz-tmp/pivot", 0777) = 0
[pid  5820] pivot_root("./syz-tmp", "./syz-tmp/pivot") = 0
[pid  5820] chdir("/")                  = 0
[pid  5820] umount2("./pivot", MNT_DETACH) = 0
[pid  5820] chroot("./newroot")         = 0
[pid  5820] chdir("/")                  = 0
[pid  5820] mkdir("/dev/gadgetfs", 0777) = 0
[pid  5820] mount("gadgetfs", "/dev/gadgetfs", "gadgetfs", 0, NULL) = 0
[pid  5820] mkdir("/dev/binderfs", 0777) = 0
[pid  5820] mount("binder", "/dev/binderfs", "binder", 0, NULL) = -1 ENODEV (No such device)
[pid  5820] symlink("/dev/binderfs", "./binderfs") = 0
[pid  5820] mount(NULL, "/sys/fs/fuse/connections", "fusectl", 0, NULL) = -1 EBUSY (Device or resource busy)
[pid  5820] write(1, "executing program\n", 18executing program
) = 18
[pid  5820] memfd_create("syzkaller", 0) = 3
[pid  5820] mmap(NULL, 138412032, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f73f9c00000
[pid  5820] 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"..., 1048576) = 1048576
[pid  5820] munmap(0x7f73f9c00000, 138412032) = 0
[pid  5820] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = 4
[pid  5820] ioctl(4, LOOP_SET_FD, 3)    = 0
[pid  5820] close(3)                    = 0
[pid  5820] close(4)                    = 0
[pid  5820] mkdir("./bus", 0777)        = 0
[   86.492264][ T5820] loop0: detected capacity change from 0 to 2048
[pid  5820] mount("/dev/loop0", "./bus", "nilfs2", MS_NOSUID, "") = 0
[pid  5820] openat(AT_FDCWD, "./bus", O_RDONLY|O_DIRECTORY) = 3
[pid  5820] chdir("./bus")              = 0
[pid  5820] openat(AT_FDCWD, "/dev/loop0", O_RDWR) = -1 EBUSY (Device or resource busy)
[pid  5820] openat(AT_FDCWD, "./file1", O_RDWR|O_CREAT, 000) = 4
[pid  5820] mmap(0x200000000000, 6291456, PROT_READ|PROT_WRITE|PROT_EXEC|PROT_GROWSUP|0x7ffff0, MAP_SHARED|MAP_FIXED|MAP_NONBLOCK|MAP_LOCKED|1<<MAP_HUGE_SHIFT, 4, 0) = 0x200000000000
[   86.532874][ T5824] NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds
[pid  5820] ppoll(NULL, 0, {tv_sec=0, tv_nsec=60000000}, NULL, 0) = 0 (Timeout)
[pid  5820] exit_group(1)               = ?
[   86.682999][ T5824] NILFS (loop0): vblocknr = 23 has abnormal lifetime: start cno (= 4294967298) > current cno (= 3)
[   86.693907][ T5824] NILFS error (device loop0): nilfs_bmap_propagate: broken bmap (inode number=4)
[   86.703929][ T5824] 
[   86.706293][ T5824] ======================================================
[   86.713331][ T5824] WARNING: possible circular locking dependency detected
[   86.720388][ T5824] 6.15.0-rc4-syzkaller #0 Not tainted
[   86.725763][ T5824] ------------------------------------------------------
[   86.732778][ T5824] segctord/5824 is trying to acquire lock:
[   86.738582][ T5824] ffff88807b52f090 (&nilfs->ns_sem){++++}-{4:4}, at: __nilfs_error+0x1ca/0x4b0
[   86.747574][ T5824] 
[   86.747574][ T5824] but task is already holding lock:
[   86.754933][ T5824] ffff88807b52f2a0 (&nilfs->ns_segctor_sem){++++}-{4:4}, at: nilfs_transaction_lock+0x253/0x4c0
[   86.765387][ T5824] 
[   86.765387][ T5824] which lock already depends on the new lock.
[   86.765387][ T5824] 
[   86.775781][ T5824] 
[   86.775781][ T5824] the existing dependency chain (in reverse order) is:
[   86.784793][ T5824] 
[   86.784793][ T5824] -> #6 (&nilfs->ns_segctor_sem){++++}-{4:4}:
[   86.793048][ T5824]        lock_acquire+0x120/0x360
[   86.798073][ T5824]        down_read+0x46/0x2e0
[   86.802754][ T5824]        nilfs_transaction_begin+0x365/0x710
[   86.808754][ T5824]        nilfs_page_mkwrite+0x8b0/0xc20
[   86.814305][ T5824]        do_page_mkwrite+0x14a/0x310
[   86.819579][ T5824]        do_wp_page+0x2626/0x5760
[   86.824603][ T5824]        __handle_mm_fault+0x1028/0x5380
[   86.830269][ T5824]        handle_mm_fault+0x2d5/0x7f0
[   86.835553][ T5824]        do_user_addr_fault+0xa81/0x1390
[   86.841186][ T5824]        exc_page_fault+0x68/0x110
[   86.846295][ T5824]        asm_exc_page_fault+0x26/0x30
[   86.851657][ T5824] 
[   86.851657][ T5824] -> #5 (sb_internal#2){.+.+}-{0:0}:
[   86.859133][ T5824]        lock_acquire+0x120/0x360
[   86.864151][ T5824]        nilfs_transaction_begin+0x268/0x710
[   86.870128][ T5824]        nilfs_page_mkwrite+0x8b0/0xc20
[   86.875686][ T5824]        do_page_mkwrite+0x14a/0x310
[   86.880960][ T5824]        do_wp_page+0x2626/0x5760
[   86.885983][ T5824]        __handle_mm_fault+0x1028/0x5380
[   86.891609][ T5824]        handle_mm_fault+0x2d5/0x7f0
[   86.896893][ T5824]        do_user_addr_fault+0xa81/0x1390
[   86.902520][ T5824]        exc_page_fault+0x68/0x110
[   86.907631][ T5824]        asm_exc_page_fault+0x26/0x30
[   86.912992][ T5824] 
[   86.912992][ T5824] -> #4 (sb_pagefaults){.+.+}-{0:0}:
[   86.920451][ T5824]        lock_acquire+0x120/0x360
[   86.925472][ T5824]        nilfs_page_mkwrite+0x21e/0xc20
[   86.931029][ T5824]        do_page_mkwrite+0x14a/0x310
[   86.936313][ T5824]        do_wp_page+0x2626/0x5760
[   86.941336][ T5824]        __handle_mm_fault+0x1028/0x5380
[   86.946967][ T5824]        handle_mm_fault+0x2d5/0x7f0
[   86.952249][ T5824]        do_user_addr_fault+0xa81/0x1390
[   86.957879][ T5824]        exc_page_fault+0x68/0x110
[   86.962988][ T5824]        asm_exc_page_fault+0x26/0x30
[   86.968352][ T5824] 
[   86.968352][ T5824] -> #3 (vm_lock){++++}-{0:0}:
[   86.975295][ T5824]        lock_acquire+0x120/0x360
[   86.980314][ T5824]        __vma_enter_locked+0x182/0x380
[   86.985855][ T5824]        __vma_start_write+0x1e/0x120
[   86.991223][ T5824]        mprotect_fixup+0x571/0x9b0
[   86.996413][ T5824]        setup_arg_pages+0x53a/0xaa0
[   87.001691][ T5824]        load_elf_binary+0xb7a/0x27b0
[   87.007063][ T5824]        bprm_execve+0x999/0x1440
[   87.012082][ T5824]        kernel_execve+0x8f0/0x9f0
[   87.017189][ T5824]        try_to_run_init_process+0x13/0x60
[   87.023005][ T5824]        kernel_init+0xad/0x1d0
[   87.027854][ T5824]        ret_from_fork+0x4b/0x80
[   87.032792][ T5824]        ret_from_fork_asm+0x1a/0x30
[   87.038074][ T5824] 
[   87.038074][ T5824] -> #2 (&mm->mmap_lock){++++}-{4:4}:
[   87.045627][ T5824]        lock_acquire+0x120/0x360
[   87.050646][ T5824]        __might_fault+0xcc/0x130
[   87.055665][ T5824]        _copy_to_iter+0xf3/0x15a0
[   87.060774][ T5824]        copy_page_to_iter+0xa7/0x150
[   87.066146][ T5824]        filemap_read+0x78d/0x11d0
[   87.071262][ T5824]        blkdev_read_iter+0x30a/0x440
[   87.076630][ T5824]        vfs_read+0x4cd/0x980
[   87.081299][ T5824]        ksys_read+0x145/0x250
[   87.086053][ T5824]        do_syscall_64+0xf6/0x210
[   87.091069][ T5824]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   87.097474][ T5824] 
[   87.097474][ T5824] -> #1 (&sb->s_type->i_mutex_key#7){++++}-{4:4}:
[   87.106074][ T5824]        lock_acquire+0x120/0x360
[   87.111096][ T5824]        down_write+0x96/0x1f0
[   87.115851][ T5824]        set_blocksize+0x23b/0x500
[   87.120955][ T5824]        sb_min_blocksize+0x119/0x210
[   87.126321][ T5824]        init_nilfs+0x43/0x690
[   87.131075][ T5824]        nilfs_fill_super+0x8f/0x650
[   87.136356][ T5824]        nilfs_get_tree+0x4f4/0x870
[   87.141581][ T5824]        vfs_get_tree+0x8f/0x2b0
[   87.146520][ T5824]        do_new_mount+0x24a/0xa40
[   87.151543][ T5824]        __se_sys_mount+0x317/0x410
[   87.156733][ T5824]        do_syscall_64+0xf6/0x210
[   87.161768][ T5824]        entry_SYSCALL_64_after_hwframe+0x77/0x7f
[   87.168173][ T5824] 
[   87.168173][ T5824] -> #0 (&nilfs->ns_sem){++++}-{4:4}:
[   87.175729][ T5824]        validate_chain+0xb9b/0x2140
[   87.181017][ T5824]        __lock_acquire+0xaac/0xd20
[   87.186209][ T5824]        lock_acquire+0x120/0x360
[   87.191227][ T5824]        down_write+0x96/0x1f0
[   87.195995][ T5824]        __nilfs_error+0x1ca/0x4b0
[   87.201100][ T5824]        nilfs_bmap_propagate+0x108/0x130
[   87.206824][ T5824]        nilfs_collect_file_data+0x4f/0xd0
[   87.212630][ T5824]        nilfs_segctor_apply_buffers+0x161/0x330
[   87.219035][ T5824]        nilfs_segctor_scan_file+0x68e/0x8e0
[   87.225003][ T5824]        nilfs_segctor_do_construct+0x1d46/0x6970
[   87.231413][ T5824]        nilfs_segctor_construct+0x17b/0x690
[   87.237391][ T5824]        nilfs_segctor_thread+0x6f7/0xe00
[   87.243107][ T5824]        kthread+0x70e/0x8a0
[   87.247685][ T5824]        ret_from_fork+0x4b/0x80
[   87.252607][ T5824]        ret_from_fork_asm+0x1a/0x30
[   87.257893][ T5824] 
[   87.257893][ T5824] other info that might help us debug this:
[   87.257893][ T5824] 
[   87.268113][ T5824] Chain exists of:
[   87.268113][ T5824]   &nilfs->ns_sem --> sb_internal#2 --> &nilfs->ns_segctor_sem
[   87.268113][ T5824] 
[   87.281501][ T5824]  Possible unsafe locking scenario:
[   87.281501][ T5824] 
[   87.288936][ T5824]        CPU0                    CPU1
[   87.294286][ T5824]        ----                    ----
[   87.299637][ T5824]   lock(&nilfs->ns_segctor_sem);
[   87.304669][ T5824]                                lock(sb_internal#2);
[   87.311443][ T5824]                                lock(&nilfs->ns_segctor_sem);
[   87.318977][ T5824]   lock(&nilfs->ns_sem);
[   87.323300][ T5824] 
[   87.323300][ T5824]  *** DEADLOCK ***
[   87.323300][ T5824] 
[   87.331454][ T5824] 1 lock held by segctord/5824:
[   87.336287][ T5824]  #0: ffff88807b52f2a0 (&nilfs->ns_segctor_sem){++++}-{4:4}, at: nilfs_transaction_lock+0x253/0x4c0
[   87.347177][ T5824] 
[   87.347177][ T5824] stack backtrace:
[   87.353086][ T5824] CPU: 1 UID: 0 PID: 5824 Comm: segctord Not tainted 6.15.0-rc4-syzkaller #0 PREEMPT(full) 
[   87.353108][ T5824] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025
[   87.353124][ T5824] Call Trace:
[   87.353131][ T5824]  <TASK>
[   87.353140][ T5824]  dump_stack_lvl+0x189/0x250
[   87.353165][ T5824]  ? __pfx_dump_stack_lvl+0x10/0x10
[   87.353183][ T5824]  ? __pfx__printk+0x10/0x10
[   87.353204][ T5824]  ? print_lock_name+0xde/0x100
[   87.353225][ T5824]  print_circular_bug+0x2ee/0x310
[   87.353248][ T5824]  check_noncircular+0x134/0x160
[   87.353271][ T5824]  validate_chain+0xb9b/0x2140
[   87.353292][ T5824]  ? __irq_work_queue_local+0x13a/0x3e0
[   87.353308][ T5824]  ? irq_work_queue+0xbc/0x140
[   87.353327][ T5824]  __lock_acquire+0xaac/0xd20
[   87.353345][ T5824]  ? __nilfs_error+0x1ca/0x4b0
[   87.353364][ T5824]  lock_acquire+0x120/0x360
[   87.353379][ T5824]  ? __nilfs_error+0x1ca/0x4b0
[   87.353400][ T5824]  ? _printk+0xcf/0x120
[   87.353421][ T5824]  down_write+0x96/0x1f0
[   87.353436][ T5824]  ? __nilfs_error+0x1ca/0x4b0
[   87.353454][ T5824]  ? __pfx_down_write+0x10/0x10
[   87.353472][ T5824]  __nilfs_error+0x1ca/0x4b0
[   87.353500][ T5824]  ? __pfx___nilfs_error+0x10/0x10
[   87.353519][ T5824]  ? nilfs_bmap_propagate+0x84/0x130
[   87.353560][ T5824]  nilfs_bmap_propagate+0x108/0x130
[   87.353578][ T5824]  nilfs_collect_file_data+0x4f/0xd0
[   87.353593][ T5824]  nilfs_segctor_apply_buffers+0x161/0x330
[   87.353607][ T5824]  ? __pfx_nilfs_collect_file_data+0x10/0x10
[   87.353621][ T5824]  nilfs_segctor_scan_file+0x68e/0x8e0
[   87.353636][ T5824]  ? reacquire_held_locks+0x127/0x1d0
[   87.353656][ T5824]  ? __mark_inode_dirty+0x4a6/0xdf0
[   87.353670][ T5824]  ? __pfx_nilfs_segctor_scan_file+0x10/0x10
[   87.353686][ T5824]  ? nilfs_cpfile_create_checkpoint+0x5ba/0x760
[   87.353703][ T5824]  ? up_write+0x1c4/0x420
[   87.353716][ T5824]  ? nilfs_cpfile_create_checkpoint+0x5ba/0x760
[   87.353733][ T5824]  ? __pfx_nilfs_cpfile_create_checkpoint+0x10/0x10
[   87.353749][ T5824]  ? nilfs_segbuf_extend_segsum+0x2aa/0x3b0
[   87.353767][ T5824]  ? rcu_is_watching+0x15/0xb0
[   87.353788][ T5824]  nilfs_segctor_do_construct+0x1d46/0x6970
[   87.353832][ T5824]  ? __pfx_nilfs_segctor_do_construct+0x10/0x10
[   87.353855][ T5824]  ? __lock_acquire+0xaac/0xd20
[   87.353874][ T5824]  ? do_raw_spin_lock+0x121/0x290
[   87.353891][ T5824]  ? do_raw_spin_unlock+0x122/0x240
[   87.353905][ T5824]  ? _raw_spin_unlock+0x28/0x50
[   87.353924][ T5824]  ? nilfs_segctor_confirm+0x24e/0x2d0
[   87.353939][ T5824]  nilfs_segctor_construct+0x17b/0x690
[   87.353963][ T5824]  nilfs_segctor_thread+0x6f7/0xe00
[   87.353993][ T5824]  ? __pfx_nilfs_segctor_thread+0x10/0x10
[   87.354013][ T5824]  ? _raw_spin_unlock_irqrestore+0xad/0x110
[   87.354036][ T5824]  ? __pfx_autoremove_wake_function+0x10/0x10
[   87.354051][ T5824]  ? __kthread_parkme+0x7b/0x200
[   87.354073][ T5824]  ? __kthread_parkme+0x1a1/0x200
[   87.354096][ T5824]  kthread+0x70e/0x8a0
[   87.354111][ T5824]  ? __pfx_nilfs_segctor_thread+0x10/0x10
[   87.354132][ T5824]  ? __pfx_kthread+0x10/0x10
[   87.354146][ T5824]  ? __pfx_kthread+0x10/0x10
[   87.354159][ T5824]  ? _raw_spin_unlock_irq+0x23/0x50
[   87.354179][ T5824]  ? lockdep_hardirqs_on+0x9c/0x150
[   87.354200][ T5824]  ? __pfx_kthread+0x10/0x10
[   87.354214][ T5824]  ret_from_fork+0x4b/0x80
[   87.354226][ T5824]  ? __pfx_kthread+0x10/0x10
[   87.354240][ T5824]  ret_from_fork_asm+0x1a/0x30
[   87.354265][ T5824]  </TASK>
[pid  5820] +++ exited with 1 +++
--- SIGCHLD {si_signo=SIGCHLD, si_code=CLD_EXITED, si_pid=5820, si_uid=0, si_status=1, si_utime=0, si_stime=12 /* 0.12 s */} ---
exit_group(0)                           = ?
+++ exited with 0 +++
[