Description
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Push kjump return address even for non-kjump kexec The version of purgatory code shipped by kexec-tools attempts to look above the top of its stack to find a return address for a kjump, even in a non-kjump kexec. After the commit in Fixes: the word above the stack might not be there, leading to a fault (which is at least now caught by my exception-handling code in kexec). That commit fixed things for the actual kjump path, but no longer "gratuitously" pushes the unused return address to the stack in the non-kjump path. Put that *back* in the non-kjump path, to prevent purgatory from crashing when trying to access it.
Affected products
- Linux / Linux2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e – b0bd7a850e1f082560959707dbf57b0402071646
- Linux / Linux2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e – 7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c
- Linux / Linux2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e – 786a45757dcdf8f2beb9d4a6db605db16c18b2b4
- Linux / Linux6.14 – 6.14
- Linux / Linux0 – 6.14
- Linux / Linux6.18.33 – 6.18.*
- Linux / Linux7.0.10 – 7.0.*
- Linux / Linux7.1 – *