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Revert "Revert "linux-hardened: Disable GCC_PLUGIN_RANDSTRUCT""

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This reverts commit c68e8b05f0.

RANDSTRUCT currently fails to work with out-of-tree modules, as
evinced by
c68e8b05f0 (commitcomment-31850284)
and https://github.com/NixOS/nixpkgs/issues/53522.

Specifically, loading out-of-tree modules results in modsym version
mismatches, as in
   spl: version magic '4.20.0 SMP mod_unload modversions RANDSTRUCT_PLUGIN
from the issue above.

A working hypothesis is that the randstruct seed is not carried over when
building out-of-tree modules but more investigation is needed here.

Closes https://github.com/NixOS/nixpkgs/issues/53522
This commit is contained in:
Joachim Fasting 2019-01-07 19:18:13 +01:00
parent a4f51746f8
commit 865f7a14b4
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1 changed files with 0 additions and 5 deletions
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5
pkgs/os-specific/linux/kernel/hardened-config.nix
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@ -125,11 +125,6 @@ ${optionalString (versionAtLeast version "4.20") ''
GCC_PLUGIN_STACKLEAK y # A port of the PaX stackleak plugin
''}
${optionalString (versionAtLeast version "4.13") ''
GCC_PLUGIN_RANDSTRUCT y # A port of the PaX randstruct plugin
GCC_PLUGIN_RANDSTRUCT_PERFORMANCE y
''}
# Disable various dangerous settings
ACPI_CUSTOM_METHOD n # Allows writing directly to physical memory
PROC_KCORE n # Exposes kernel text image layout