2024 Make kernel text and rodata read-only

Make kernel text and rodata read-only

Author: dvei

August undefined, 2024

Web30 nov. 2015 · + If this is set, kernel memory (text, rodata, etc) will be made + read-only, and non-text kernel memory will be made non-executable. + The tradeoff is that each … Web25 nov. 2024 · kernel的text段是RO的，如果想改变text段为RW，可以关掉CONFIG_STRICT_KERNEL_RWX 和 CONFIG_STRICT_MODULE_RWX 这两个配置项 …

Help needed to track down bug: linking Linux kernel with gold …

WebMany such variables can be made read-only by setting them “const” so that they live in the .rodata section instead of the .data section of the kernel, gaining the protection of the … Webcreate a distinct readonly_data_section, the default is to reuse text_section. All the other varasm.ccsections are optional, and are null if the target does not provide them. Macro: TEXT_SECTION_ASM_OP A C expression whose value is a string, including spacing, containing the Normally "\t.text"is right. Macro: HOT_TEXT_SECTION_NAME cyber math summer camp

How can I change the CONFIG_ARCH_OPTIONAL_KERNEL_RWX …

Web+ +config DEBUG_RODATA + bool "Make kernel text and rodata read-only" + depends on ARM_KERNMEM_PERMS + default y + help + If this is set, kernel text and rodata … Web13 jan. 2024 · Then in _start, we are storing adenine current stack pointer, and telephone and main operate of a kernel. As she know, every process consists to varying sections … Web9 dec. 2015 · -config DEBUG_RODATA - bool "Write protect kernel read-only data structures" - default y - depends on DEBUG_KERNEL - ---help---- Mark the kernel read-only data as write-protected in the pagetables, - in order to catch accidental (and incorrect) writes to such const - data. This is recommended so that we can catch kernel bugs sooner. cybermat r3

Sections (GNU Compiler Collection (GCC) Internals)

[RFC PATCH] ARM: mm: implement CONFIG_DEBUG_RODATA

Web+ If this is set, kernel text and rodata will be made read-only. + This additionally splits rodata from kernel text so it can be made + non-executable. This creates another … WebThis function verified that the memory area starting at address ‘addr’ and of size ‘size’ was accessible for the operation specified in type (read or write). To do this, verify_read had to look up the virtual memory area (vma) that contained the address addr. In the normal case (correctly working program), this test was successful. cheap mba in ontarioWeb8 apr. 2014 · Since kernel threads use> the last process' mm, it is possible for the other CPU(s) to be> currently using the same mm as the modifying CPU.>> For any other … cybermatricks

"WebInstead, move these items into a memory region that will be made read-only during mark_rodata_ro () which happens after all kernel __init code has finished. This introduces __ro_after_init as a way to mark such memory, and uses it on the x86 vDSO to kill an extant kernel exploitation method. " - Make kernel text and rodata read-only

Make kernel text and rodata read-only

Linux Kernel Module Programming: Hello World Program

WebThis page details the process of building custom kernels for Android devices. The following instructions guide you through the process of selecting the right sources, building the … Web7 feb. 2024 · Both of these options are poorly named. The features they provide are necessary for system security and should not be considered debug only. Change the …

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Web19 mei 2016 · A solution is fast approaching in Intel's latest microarchitecture, Skylake, which will allow execute-only memory: It is the feature baptized MPK ( memory … Web30 jan. 2024 · A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and …

WebThis introduces CONFIG_DEBUG_RODATA, making kernel text and rodata read-only. Additionally, this splits rodata from text so that rodata can also be NX, which may lead …

WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [RFC PATCH] arch: arm64: have memblocks out of kernel text use section map @ 2024-11-12 9:20 Huangzhaoyang 2024-11-12 9:31 ` Ard Biesheuvel 0 siblings, 1 reply; 3+ messages in thread From: Huangzhaoyang @ 2024-11-12 9:20 UTC (permalink / raw) To: Ard … WebI know all the discussions about why of should cannot read/write files from kernel, instead wherewith to use /proc or netlink to do that. I want to read/write anyway. I are also read …

WebFrom: "Török Edwin" To: Ian Lance Taylor Cc: [email protected] Subject: Re: gold patch committed (Was: Re: Help needed to track down bug: linking Linux kernel with gold creates unbootable kernel) Date: Sat, 24 Apr 2010 07:29:00 -0000 [thread overview] Message-ID: <[email protected]> …

WebFrom: "Török Edwin" To: Ian Lance Taylor Cc: [email protected] Subject: Re: gold patch committed (Was: Re: Help needed … cybermatics s.a de c.vWebI agree with Peter T Breuer , there are so many "kernel", i.e a MATLAB tool has a kernel and need to run when it open as read only .please be more specific. Cite 8th Sep, 2014 cybermat r1Webcool! could you perhaps also do an add-on: > + /* test 1: read the value */ > + /* test 2: write to the variable; this should fault */ > + /* test 3: check the value hasn't changed */ test 4: … cybermatt twitterWeb1 jun. 2024 · Since the text segment is marked as readable and executable, sections that are put there will be non-writable – which in this case are “.text” and “.rodata”. It can … cybermatterWebThis code is the general case. Access to set_fixmap is done via the kernel patching interface: patch_text(). Right now, the patch_text interface checks cache_ops_need_broadcast(), and conditionally runs under stop_machine(). We could make this unconditional, and we'll avoid any problem with TLB misses on another CPU. cheap mba in finance programsWeb24 mei 2024 · Reported by Andrew Boie: We need to make sure that there is a split between rodata and program text, program text should be executable (and probably not … cheap mba programsWeb6 feb. 2016 · Make kernel text and rodata read-only found in arch/arm64/Kconfig.debug The configuration item CONFIG_DEBUG_RODATA: prompt: Make kernel text and … cybermat online