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External Buildroot tree for STMicroelectronics boards configurations
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dd: failed to open 'output/images/sdcard.img': Operation not permitted (issue with sdcard.img) #44

Open jaygitdev opened 8 months ago

jaygitdev commented 8 months ago

I was trying to follow the instructions for a STM32MP157d-DK1 board but ran into an issue where I apparently can't do anything with the *.img file that was produced. It's only 200MB or so (which seems small) and I can't get it to work with DD. In fact, I can't even copy it to take it to another computer to try and burn with Belana Etcher or another tool like that.

This is what I'm seeing when trying the last step:

sudo dd if=output/images/sdcard.img of=/dev/mmcblk0 bs=1M
dd: failed to open 'output/images/sdcard.img': Operation not permitted

These are the steps I followed to create said image:

    $ sudo apt install debianutils sed make binutils build-essential gcc g++ bash patch gzip bzip2  perl tar cpio unzip rsync file bc git
    $ git clone -b st/2023.02.2 https://github.com/bootlin/buildroot.git
    $ git clone -b st/2023.02.2 https://github.com/bootlin/buildroot-external-st.git
    $ cd buildroot/
    $ make BR2_EXTERNAL=../buildroot-external-st st_stm32mp157d_dk1_demo_defconfig
    $ make
    $ sudo dd if=output/images/sdcard.img of=/dev/mmcblk0 bs=1M

As I mentioned above, all signs seem to point to an issue with *.img (at least to me), though I'm not sure what I might've done wrong. Maybe I missed something but I don't believe so. Let me know if you need any additional info from me. Thanks!

kmaincent commented 8 months ago

The image is about 203MB in size on my last build, it is a usual size.

This seems weird. Did the make finish successfully without any errors? Did you verify the file permissions? ls -l output/images/sdcard.img

Could you also share an strace of the command to know what really happen? sudo strace dd if=output/images/sdcard.img of=/dev/mmcblk0 bs=1M

jaygitdev commented 8 months ago

Yeah, I tried a few different things last week without any luck, unfortunately. I had tried using: chmod 777 output/images/sdcard.img But that didn't change anything, unfortunately. I didn't see any errors . . . but there were what appeared to be thousands of lines that flashed in front of me so it's not impossible I missed it. I saved the output of everything that was left in the terminal (it's not complete, but it's a 775 KB file). Below is the last section, if it helps:

Superblock backups stored on blocks: 
    8193, 24577, 40961, 57345, 73729

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (4096 blocks): done
Copying files into the device: done
Writing superblocks and filesystem accounting information: done 

ln -sf rootfs.ext2 /home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/images/rootfs.ext4
ln -snf /home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/host/arm-buildroot-linux-gnueabihf/sysroot /home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/staging
>>>   Executing post-image script /home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot-external-st/board/stmicroelectronics/stm32mp1/post-image.sh
INFO: cmd: "mkdir -p "/home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/build/genimage.tmp"" (stderr):
INFO: cmd: "rm -rf "/home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/build/genimage.tmp"/*" (stderr):
INFO: cmd: "mkdir -p "/home/local/a/b/Documents/Projects/STM32MP1/STBuildroot/buildroot/output/images"" (stderr):
INFO: hdimage(sdcard.img): adding partition 'fsbl1' (in MBR) from 'tf-a-stm32mp157d-dk1-mx.stm32' ...
INFO: hdimage(sdcard.img): adding partition 'fsbl2' (in MBR) from 'tf-a-stm32mp157d-dk1-mx.stm32' ...
INFO: hdimage(sdcard.img): adding partition 'fip' (in MBR) from 'fip.bin' ...
INFO: hdimage(sdcard.img): adding partition 'rootfs' (in MBR) from 'rootfs.ext4' ...
INFO: hdimage(sdcard.img): adding partition '[MBR]' ...
INFO: hdimage(sdcard.img): adding partition '[GPT header]' ...
INFO: hdimage(sdcard.img): adding partition '[GPT array]' ...
INFO: hdimage(sdcard.img): adding partition '[GPT backup]' ...
INFO: hdimage(sdcard.img): writing GPT
INFO: hdimage(sdcard.img): writing protective MBR
INFO: hdimage(sdcard.img): writing MBR

Here's the strace output you requested though:

sudo strace dd if=output/images/sdcard.img of=/dev/mmcblk0 bs=1M
execve("/usr/bin/dd", ["dd", "if=output/images/sdcard.img", "of=/dev/mmcblk0", "bs=1M"], 0x7fff7af5e7b8 /* 16 vars */) = 0
brk(NULL)                               = 0x55dd97165000
arch_prctl(0x3001 /* ARCH_??? */, 0x7ffc09f2d2d0) = -1 EINVAL (Invalid argument)
access("/etc/ld.so.preload", R_OK)      = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=85073, ...}) = 0
mmap(NULL, 85073, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f4904ef0000
close(3)                                = 0
openat(AT_FDCWD, "/lib/x86_64-linux-gnu/libc.so.6", O_RDONLY|O_CLOEXEC) = 3
read(3, "\177ELF\2\1\1\3\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0\300A\2\0\0\0\0\0"..., 832) = 832
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\346x\376T\245\322\302\t/\216G\353\v3\20^"..., 68, 880) = 68
fstat(3, {st_mode=S_IFREG|0755, st_size=2029592, ...}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f4904eee000
pread64(3, "\6\0\0\0\4\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0@\0\0\0\0\0\0\0"..., 784, 64) = 784
pread64(3, "\4\0\0\0\20\0\0\0\5\0\0\0GNU\0\2\0\0\300\4\0\0\0\3\0\0\0\0\0\0\0", 32, 848) = 32
pread64(3, "\4\0\0\0\24\0\0\0\3\0\0\0GNU\0\346x\376T\245\322\302\t/\216G\353\v3\20^"..., 68, 880) = 68
mmap(NULL, 2037344, PROT_READ, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f4904cfc000
mmap(0x7f4904d1e000, 1540096, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x22000) = 0x7f4904d1e000
mmap(0x7f4904e96000, 319488, PROT_READ, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19a000) = 0x7f4904e96000
mmap(0x7f4904ee4000, 24576, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x1e7000) = 0x7f4904ee4000
mmap(0x7f4904eea000, 13920, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f4904eea000
close(3)                                = 0
arch_prctl(ARCH_SET_FS, 0x7f4904eef580) = 0
mprotect(0x7f4904ee4000, 16384, PROT_READ) = 0
mprotect(0x55dd96036000, 4096, PROT_READ) = 0
mprotect(0x7f4904f32000, 4096, PROT_READ) = 0
munmap(0x7f4904ef0000, 85073)           = 0
rt_sigaction(SIGINT, NULL, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=0}, 8) = 0
rt_sigaction(SIGUSR1, {sa_handler=0x55dd960278b0, sa_mask=[INT USR1], sa_flags=SA_RESTORER, sa_restorer=0x7f4904d3f090}, NULL, 8) = 0
rt_sigaction(SIGINT, {sa_handler=0x55dd960278a0, sa_mask=[INT USR1], sa_flags=SA_RESTORER|SA_NODEFER|SA_RESETHAND, sa_restorer=0x7f4904d3f090}, NULL, 8) = 0
brk(NULL)                               = 0x55dd97165000
brk(0x55dd97186000)                     = 0x55dd97186000
openat(AT_FDCWD, "/usr/lib/locale/locale-archive", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=5699248, ...}) = 0
mmap(NULL, 5699248, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f490478c000
close(3)                                = 0
openat(AT_FDCWD, "output/images/sdcard.img", O_RDONLY) = -1 EPERM (Operation not permitted)
openat(AT_FDCWD, "/usr/share/locale/locale.alias", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=2996, ...}) = 0
read(3, "# Locale name alias data base.\n#"..., 4096) = 2996
read(3, "", 4096)                       = 0
close(3)                                = 0
openat(AT_FDCWD, "/usr/share/locale/en_US.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.utf8/LC_MESSAGES/coreutils.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en/LC_MESSAGES/coreutils.mo", O_RDONLY) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=613, ...}) = 0
mmap(NULL, 613, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f4904f31000
close(3)                                = 0
write(2, "dd: ", 4dd: )                     = 4
write(2, "failed to open 'output/images/sd"..., 41failed to open 'output/images/sdcard.img') = 41
openat(AT_FDCWD, "/usr/share/locale/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en_US/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.UTF-8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en.utf8/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/share/locale-langpack/en/LC_MESSAGES/libc.mo", O_RDONLY) = -1 ENOENT (No such file or directory)
write(2, ": Operation not permitted", 25: Operation not permitted) = 25
write(2, "\n", 1
)                       = 1
close(2)                                = 0
exit_group(1)                           = ?
+++ exited with 1 +++

Unfortunately, this doesn't mean much to me, I'm sure I'm missing something . . . thanks for your help!

tpetazzoni commented 8 months ago

Which distribution are you running? Do you have some specific security mechanism in place (SELinux, something else) ?

Could you provide the output of:

  1. ls -l output/images
  2. lsattr output/images

Could you comment on whether you're doing the Buildroot build as root (or with sudo) or as a regular user?

Overall, this really seems like a specific issue on your system, not something directly Buildroot related.

tpetazzoni commented 8 months ago

After the build, please also run:

  1. sha256sum output/images/sdcard.img
  2. sudo sha256sum output/images/sdcard.img

So that we can see if you can access the sdcard.img file as the regular user and/or as root. My bet is that you have some security mechanism enabled in your Linux distro, and the file that was generated by a regular user as part of the Buildroot build process is not accessible by the root user.