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| dvergatal | hi all what can be the cause that when running oe_runmake in do_compile nothing happens but when i run make -j $(nproc) it compiles? | 10:51 |
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| rburton | dvergatal: you're in the wrong directory probably | 10:54 |
| rburton | (oe_runmake is just a wrapper around make) | 10:54 |
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| dvergatal | rburton: hmmm im doing it with source coude in devtool | 10:56 |
| dvergatal | rburton: so maybe this is the issue? | 10:56 |
| rburton | you're not giving enough information, but check that your task is in the directory you think it is. do_compile() normally executes in ${B}. | 10:56 |
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| dvergatal | rburton: hmmm i dunno what additional information would be enough :/ i'm just running one command in do_compile which is oe_runmake and i see in logfile that it is make with additional parameters and it looks like this make -j 16 CC=x86_64-welotec-linux-gcc -m64 -march=core2 -mtune=core2 -msse3 -mfpmath=sse | 11:03 |
| dvergatal | --sysroot=/work/build/tmp/default-glibc/work/eg500-welotec-linux/communication/1.0+git+bb36e9b9e8/recipe-sysroot CXXFLAGS=-DMACHINE MACHINE=eg500 and nothing more in my logfile but if i change this oe_runmake to make -j $(nproc) it compiles | 11:03 |
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| RP | dvergatal: quoting issue? | 11:06 |
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| dvergatal | RP: you think? | 11:07 |
| dvergatal | EXTRA_OEMAKE = "CC='${CC}' CXXFLAGS='${EXTRA_CXXFLAGS}' MACHINE='${MACHINE}" | 11:07 |
| dvergatal | maybe this? | 11:07 |
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| dvergatal | yeah you are right | 11:07 |
| dvergatal | :D | 11:07 |
| dvergatal | RP: thx | 11:08 |
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| dvergatal | RP: rburton: thx it is working now | 11:19 |
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| bjdooks | is there anyone who could do a big-endian riscv qemu machine? I can supply kernel repo, but i'm not very good at yocto and I've got a pile of other things currently ongoing wiht big-endian riscv | 11:44 |
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| Tyaku | Hello, I am reading a lot about security in embedded devices. Currently this is what I see: | 12:47 |
| Tyaku | 1. Use secure boot to make sure the bootloaders, kernel, DTB, rootfs, files are correct (on startup, not at runtime) | 12:47 |
| Tyaku | 2. To have some secure storage we can use TA (OP-TEE) | 12:47 |
| Tyaku | 3. We can limit which app have access to /dev/tee0 using AppArmor | 12:47 |
| Tyaku | 4. Run application with non root user (to prevent any vulnerability in an app that permits to execute code/commands as root) | 12:47 |
| Tyaku | 5. In my opinion: IMA and EVM doesn't seems to be necessary, because if no applications have root privilege, then if an attacker arrive to execute commands from the application he will not be able to replace a file or a configuration owned by root. | 12:47 |
| Tyaku | -> What do you think about IMA / EVM is it really needed ? | 12:48 |
| Tyaku | -> Is there some document with good practices or like tutorial to setup all of this with yocto ? | 12:48 |
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| rburton | 5 is a bad assumption: root escalation exploits exist | 12:55 |
| rburton | and you can't have _no_ services running as root | 12:56 |
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| neverpanic | Tyaku: Instead of IMA/EVM, dm-verify might be an option if you don't need a writable rootfs. | 13:01 |
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| neverpanic | Also, files can be modified offline, which is something IMA/EVM or dm-verity protect against. You don't need root *on your device* to modify the storage, somebody could unplug your disk or solder a connector to your eMMC lines. | 13:02 |
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| neverpanic | And, you've left out the most important point in securing your embedded device, and that's: 0. Patch CVEs and actually update your devices. | 13:03 |
| neverpanic | Nobody will even bother attempting to modify your boot sequence if they can just send a malicous packet to your kernel and get code execution that way. | 13:04 |
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| Tyaku | neverpanic: Yes and for this point, it's miraculous, we are using the RZG2UL Security package from renesas, still in Hardknott | 13:09 |
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| Tyaku | But They plan to make another one available with most recent yocto version :D | 13:10 |
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