Client 2.4.11 wont start on Oracle-Linux-7.9-aarch64 due to libc: failed to make WriteProtected nonwritable in initialize error

client
1

When i tried to install Urbackup Client 2.4.11 on Oracle-Linux-7.9-aarch64 i have run in this issue.

Installer script logs this in the console:

Verifying archive integrity... All good.
Uncompressing UrBackup Client Installer for Linux  100%
Installation of UrBackup Client 2.4.11 to /usr/local ... Proceed ? [Y/n]
y
Uncompressing install data...
Assuming RedHat (derivative) system
Detected systemd
Detected architecture aarch64-linux-android
Error running executable on this system (aarch64). Stopping installation.

And urbackupclientctl and urbackupclientbackend both abort when i run them with this message:

failed to make WriteProtected nonwritable in initialize
libc: failed to make WriteProtected nonwritable in initialize
Aborted (core dumped)

Is Urbackup client supported on this Linux distribution? If so is anyone able to tell me what might be wrong? I have saved core dumps and will send them to bugreports@urbackup.org as requested in faq.

2

Looks like a mprotect call fails… Could you run it with strace -f urbackupclientctl to see the error?

3

Of course. Here is strace output:

execve("/usr/local/bin/urbackupclientctl", ["urbackupclientctl"], 0xffffdeca4cf8 /* 25 vars */) = 0
getpid()                                = 29841
mmap(NULL, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfffcca800000
set_tid_address(0x5267e0)               = 29841
faccessat(AT_FDCWD, "/dev/urandom", R_OK) = 0
futex(0x523818, FUTEX_WAKE_PRIVATE, 2147483647) = 0
getrandom("\x4a\x22\x78\xed\x28\xd3\x70\xd6\x16\x75\x89\xf0\x19\x3a\x53\x78\x9e\x5b\xed\xb5\x06\x10\x32\xf4\xcf\x21\x72\x17\xa4\xc8\x0f\xaf"..., 40, GRND_NONBLOCK) = 40
mmap(NULL, 1104, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfffcca7f0000
prctl(PR_SET_VMA, 0, 0xfffcca7f0000, 0x450, 0x4e3406) = -1 EINVAL (Invalid argument)
sched_getscheduler(0)                   = 0 (SCHED_OTHER)
mmap(NULL, 36864, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfffcca7e0000
mprotect(0xfffcca7e0000, 4096, PROT_NONE) = 0
sigaltstack({ss_sp=0xfffcca7e1000, ss_flags=0, ss_size=32768}, NULL) = 0
prctl(PR_SET_VMA, 0, 0xfffcca7e1000, 0x8000, 0x4e461d) = -1 EINVAL (Invalid argument)
mmap(NULL, 16777216, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfffcc97e0000
mprotect(0xfffcca7b4000, 8192, PROT_READ|PROT_WRITE) = -1 EINVAL (Invalid argument)
mprotect(0x524000, 4096, PROT_READ)     = -1 EINVAL (Invalid argument)
writev(2, [{iov_base="failed to make WriteProtected no"..., iov_len=55}, {iov_base="\n", iov_len=1}], 2failed to make WriteProtected nonwritable in initialize
) = 56
socket(AF_UNIX, SOCK_DGRAM|SOCK_CLOEXEC|SOCK_NONBLOCK, 0) = 3
connect(3, {sa_family=AF_UNIX, sun_path="/dev/socket/logdw"}, 110) = -1 ENOENT (No such file or directory)
close(3)                                = 0
writev(2, [{iov_base="libc", iov_len=4}, {iov_base=": ", iov_len=2}, {iov_base="failed to make WriteProtected no"..., iov_len=55}, {iov_base="\n", iov_len=1}], 4libc: failed to make WriteProtected nonwritable in initialize
) = 62
mmap(NULL, 80, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xfffcc97d0000
prctl(PR_SET_VMA, 0, 0xfffcc97d0000, 0x50, 0x4dec43) = -1 EINVAL (Invalid argument)
rt_sigprocmask(SIG_SETMASK, ~[ABRT RT_1 RT_2 RT_3 RT_4 RT_5], NULL, 8) = 0
getpid()                                = 29841
gettid()                                = 29841
getuid()                                = 1000
rt_tgsigqueueinfo(29841, 29841, SIGABRT, {}) = 0
--- SIGABRT {si_signo=SIGABRT, si_code=SI_QUEUE, si_pid=29841, si_uid=1000} ---
+++ killed by SIGABRT (core dumped) +++
4

Maybe 64k pages are enabled? On Debian I can check like this:

grep CONFIG_ARM64_64K_PAGES /boot/config-5.10.47
grep CONFIG_ARM64_16K_PAGES /boot/config-5.10.47

5

Indeed they are. Looking in /boot/config-… (both of them)

# CONFIG_ARM64_16K_PAGES is not set
CONFIG_ARM64_64K_PAGES=y

Is there something i can do to make urbackup client work in this case?

6

Not the binary client… it seems to need 4k pages and there is no easy way to fix (problem is in Android bionic). Compile it?

2 Likes
7

Thank you kindly for taking time with me. I just got it working. I started trying to compile it yesterday. I feared compiling it cause i don’t know repo names on this distro. Turns out it was not that bad. Only had to compile crypto++ manually to get it compiling…

And while i severely dislike fact that i had to put this line in systemd service it works.
ExecStart=/usr/bin/scl enable oracle-armtoolset-8 "/usr/local/sbin/urbackupclientbackend --no-consoletime"
But that is just my personal opinions about scl.

obraz
obraz1006Ă—84 4.09 KB

Thanks again for taking a look :heart:

8

Just in case anyone else finds this thread and wants to install UrBackup on their Oracle Linux 8 machine, I was able to do it without compiling anything other than the client itself:

dnf install cryptopp-devel zlib-devel wxBase3-devel wxGTK3-devel
dnf groupinstall "Development Tools"

I then followed the rest of the compilation instructions at UrBackup - Install client on Debian or Ubuntu from sources