2024 Indirect call found in retpoline build

Indirect call found in retpoline build

Author: gkwp

August undefined, 2024

WebSolution 2 - Security. A retpoline is designed to protect against the branch target injection ( CVE-2024-5715) exploit. This is an attack where an indirect branch instruction in the … Web28 okt. 2024 · It would be very useful to have a code-gen option to write out `call %cs:__x86_indirect_thunk_r {8..15}` where the redundant %cs prefix will increase the …

Solved: After fedora 29 upgrades kernel 5.0.3-200.fc29.x86.

WebRather than fixing every XDP-enabled driver and locations in stack by hand, it would be good to instead raise the limit where gcc would emit expensive indirect calls from the … Web31 mei 2024 · Retpoline是针对Spectre V2漏洞 (CVE-2024-5715)提出的规避方案。在V2版本中有google的工程师提出，主要用于解决IBRS带来的难以接受的性能损耗问题。 … michael dennehy boston university

[PATCH 5.18 34/61] objtool: Update Retpoline validation - Greg …

WebThere's a special code sequence called a retpoline that can do indirect calls without speculation. We use a new compiler option -mindirect-branch=thunk-extern (gcc … WebThe first and most straightforward method to build retpoline based kernel modules is to use a compiler that supports the -mindirect-branch switches and build against a retpoline … WebEnsures GCC doesn't generate particularly stupid code which would re-insert a dynamic test. - objtool validation of retpoline Looks for indirect JMP/CALL sites when build with … michael dennany rathowen

#20248 (Building DKMS modules fails with some kernel configs, …

Avoid speculative indirect calls in kernel

Web4 jan. 2024 · Posted by Matt Linton, Senior Security Engineer and Pat Parseghian, Technical Program Manager Yesterday, Google’s Project Zero team posted detailed … The branch target injection exploit targets a processor’s indirect branch predictor. Direct branches occur when the destination of the branch is known from the instruction … Meer weergeven Mitigations for speculation-based, side-channel security issues fall into two categories: directly manipulating speculation … Meer weergeven An exploit using branch target injection is composed of five specific elements, all of which are required for successful exploitation. Traditional application software … Meer weergeven Deploying retpoline requires replacing vulnerable indirect branches with non-vulnerable retpoline sequences. The simplest retpoline sequence is a replacement … Meer weergeven michael denison cleethorpesWeb*PATCH v2 1/9] scripts/objdump-func: Support multiple functions 2024-04-12 19:03 [PATCH v2 0/9] objtool: warning improvements Josh Poimboeuf @ 2024-04-12 19:03 ` Josh Poimboeuf 2024-04-12 19:03 ` [PATCH v2 2/9] objtool: Add WARN_INSN() Josh Poimboeuf ` (7 subsequent siblings) 8 siblings, 0 replies; 22+ messages in thread From: Josh ... how to change color on kolmax hunter keyboard

"WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed From: Peter Zijlstra To: David Woodhouse , Thomas … " - Indirect call found in retpoline build

Indirect call found in retpoline build

Web[PATCH 4.15 099/146] objtool: Add module specific retpoline rules. Greg Kroah-Hartman Tue, 13 Mar 2024 09:32:49 -0700 Web19 jul. 2024 · RetPoline通过简单地用返回指令替换所有间接分支说明来阻止这种利用. 我认为，关于retpoline的关键只是" ret"部分，它用返回指令代替间接分支，以便CPU使用返 …

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Web14 mei 2024 · This is necessary to maintain the security guarantees of retpoline because once we’ve rewritten the indirect call into a direct call the kernel no longer gets a … WebRetbleed (CVE-2024-29900 and CVE-2024-29901) is the new addition to the family of speculative execution attacks that exploit branch target injection to leak information, …

Web3 jan. 2024 · Branch target injection works by causing an indirect branch to speculatively execute a ‘gadget’ which creates a side channel based on sensitive data available to the victim. Processors use indirect branch predictors to control only the operation of the branch instructions outlined below: Branch Type. Instruction. Web28 feb. 2024 · x86, retpolines: Raise limit for generating indirect calls from switch-case From networking side, there are numerous attempts to get rid of indirect calls in fast …

Web9 mei 2024 · The repo package used gcc 8 to build. You're correct in thinking nproc is not the answer, non-parallelizable builds wouldn't care which gcc version you used... but I … Web21 jan. 2024 · # Avoid indirect branches in kernel to deal with Spectre ifdef CONFIG_RETPOLINE RETPOLINE_CFLAGS += $ (call cc-option,-mindirect …

Web介绍. 由于Spectre变体2攻击（branch target injection）可以恶意地欺骗分支预测器对间接跳转的目标地址的预测结果，并诱导投机执行去访问敏感数据，因此在被攻击的代码中， …

Web16 mrt. 2024 · 1 Answer Sorted by: 6 Use the patches over at github.com/mkubecek/vmware-host-modules. You'll need to know if you're trying to … michael denney obituary schaller iowaWeb6 dec. 2024 · 时报出错误missing ) after argument list. 明明)的的数目是正确的，但是居然报错了，仔细想想应该是引用的时候要有转义字符，可以外圈用单引号，内圈用双引号就行了。. 改成. pa('${getMC ("")}/js/getmodules2.0.js') 就好了. list 错误. 根据错误提示信息来看，是缺 … michael dennehy actorWebFrom: Greg Kroah-Hartman To: [email protected] Cc: Greg Kroah-Hartman , [email protected], "Peter Zijlstra (Intel)" , Borislav Petkov , Josh Poimboeuf , Thadeu Lima de Souza … michael denning attorneyWebFound the internet! 25. Retpoline: a software construct for preventing ... For microbenchmarks that are switch, indirect-, or virtual-call heavy we have seen … michael dennery obituaryWeb4 jan. 2024 · However, there is no fully general alternative to indirect calls. We introduce a new construct we call a "retpoline" to implement indirect calls in a non-speculatable way. It can be thought of loosely as a trampoline for indirect calls which uses the RET instruction on x86. Further, we arrange for a specific call->ret sequence which ensures the michael demeo of floridaWebThey are replaced with a 'retpoline' call sequence which deliberately prevents speculation. v1: Initial post. v2: Add CONFIG_RETPOLINE to build kernel without it. Change warning messages. Hide modpost warning message v3: Update ... Convert assembler indirect jumps x86/retpoline: Add boot time option to disable retpoline x86/retpoline: ... how to change color on keyboard ibuypowerWeb21 mrt. 2024 · Powered by blists - more mailing lists. Confused about mailing lists and their use? Read about mailing lists on Wikipedia and check out these guidelines on proper formatting of your messages. and check out these guidelines on … how to change color on mouse