mjhjmtu

I am trying to run a HW dev app with a UI.

• In the Host => no problem


• In a Docker container => I get a free() invalid pointer error

Both are based on CentOS 7.5.

I don't understand why. I have checked the glibc versions with

yum list installed | grep glibc

and both host and Docker container have the same version (glibc-2.17-222).

What is different? I don't have access to the code and I have no idea how to solve my problem. Other libraries are exactly the same version.

That's very problematic – using the same CentOS version in host and Docker container, it behaves differently. Why?

*** Error in `X': free(): invalid pointer: 0x00007f316a80aa70 ***
======= Backtrace: =========
/lib64/libc.so.6(+0x81499)[0x7f31702ae499]
/lib64/libudev.so.1(udev_device_unref+0x37)[0x7f31681ae5f7]
/lib64/libudev.so.1(+0x8a31)[0x7f31681b1a31]
/lib64/libudev.so.1(+0x8c0e)[0x7f31681b1c0e]

I rejected the VM solution because the app uses 32GB+ of RAM and huge CPU.
This app is officially supported for RHEL/Centos. Even tho the version is free, the issue comes when a licensing window is supposed to appear.

strace

strace: Process 13391 attached
% time seconds usecs/call calls errors syscall
------ ----------- ----------- --------- --------- ----------------
 47.48 0.016584 8 2100 1803 recvmsg
 24.84 0.008675 9 1016 poll
 6.34 0.002214 17 134 read
 6.00 0.002094 9 234 write
 5.78 0.002018 8 255 writev
 3.34 0.001165 14 85 68 open
 1.88 0.000656 219 3 access
 1.24 0.000433 27 16 5 stat
 0.68 0.000239 14 17 close
 0.62 0.000217 9 25 mmap
 0.47 0.000164 23 7 munmap
 0.38 0.000132 66 2 socket
 0.25 0.000088 6 14 fstat
 0.23 0.000081 6 13 mprotect
 0.10 0.000034 34 1 ftruncate
 0.05 0.000019 6 3 fcntl
 0.05 0.000019 19 1 restart_syscall
 0.05 0.000017 17 1 getcwd
 0.03 0.000012 6 2 openat
 0.03 0.000011 6 2 getdents
 0.03 0.000010 10 1 tgkill
 0.03 0.000009 9 1 lstat
 0.02 0.000008 8 1 fstatfs
 0.02 0.000007 7 1 1 ioctl
 0.01 0.000005 5 1 readlink
 0.01 0.000004 4 1 lseek
 0.01 0.000004 4 1 rt_sigprocmask
 0.01 0.000004 4 1 uname
 0.01 0.000003 2 2 futex
------ ----------- ----------- --------- --------- ----------------
100.00 0.034926 3941 1877 total

This is before the double corruption:

10:53:31 mprotect(0x7f4c40d34000, 4096, PROT_READ) = 0
10:53:31 mprotect(0x7f4c40f4c000, 4096, PROT_READ) = 0
10:53:31 mprotect(0x7f4c41151000, 4096, PROT_READ) = 0
10:53:31 mprotect(0x7f4c41397000, 8192, PROT_READ) = 0
10:53:31 mprotect(0x7f4c4159d000, 4096, PROT_READ) = 0
10:53:31 stat("/etc/sysconfig/64bit_strstr_via_64bit_strstr_sse2_unaligned", 0x7fffb00a4540) = -1 ENOENT (No such file or directory)
10:53:31 mprotect(0x7f4c44066000, 4096, PROT_READ) = 0
10:53:31 munmap(0x7f4c89d89000, 29643) = 0
10:53:31 open("/etc/udev/udev.conf", O_RDONLY|O_CLOEXEC) = 10
10:53:31 fstat(10, st_mode=S_IFREG) = 0
10:53:31 mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4c89f20000
10:53:31 read(10, "# see udev.conf(5) for detailsnn"..., 4096) = 49
10:53:31 read(10, "", 4096) = 0
10:53:31 close(10) = 0
10:53:31 munmap(0x7f4c89f20000, 4096) = 0
10:53:31 stat("/sys/subsystem", 0x7fffb00a4b20) = -1 ENOENT (No such file or directory)
10:53:31 openat(AT_FDCWD, "/sys/bus", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 10
10:53:31 getdents(10, /* 35 entries */, 32768) = 976
10:53:31 openat(AT_FDCWD, "/sys/bus/clockevents/devices", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 11
10:53:31 getdents(11, /* 11 entries */, 32768) = 336
10:53:31 readlink("/sys/bus/clockevents/devices/clockevent2", "../../../devices/system/clockeve"..., 1024) = 47
10:53:31 stat("/sys/devices/system/clockevents/clockevent2/uevent", st_mode=S_IFREG) = 0
10:53:31 open("/dev/tty", O_RDWR|O_NOCTTY|O_NONBLOCK) = 12
10:53:31 writev(12, ["*** Error in `", 14, "tierceapp", 7, "': ", 3, "double free or corruption (out)", 31, ": 0x", 4, "00007f4c432eabc0", 16, " ***n", 5], 7) = 80

The address of the corruption 00007f4c432eabc0 doesn't link to anywhere in the strace.

Update #1:

• If I run my container with --net=host, it's working.