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hardening fixes for v6.10-rc1

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- loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression
   (Stephen Boyd)
 
 - ubsan: Restore dependency on ARCH_HAS_UBSAN
 
 - kunit/fortify: Fix memcmp() test to be amplitude agnostic
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Merge tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux

Pull hardening fixes from Kees Cook:

 - loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module
   decompression (Stephen Boyd)

 - ubsan: Restore dependency on ARCH_HAS_UBSAN

 - kunit/fortify: Fix memcmp() test to be amplitude agnostic

* tag 'hardening-v6.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  kunit/fortify: Fix memcmp() test to be amplitude agnostic
  ubsan: Restore dependency on ARCH_HAS_UBSAN
  loadpin: Prevent SECURITY_LOADPIN_ENFORCE=y without module decompression
This commit is contained in:
Linus Torvalds 2024-05-24 08:33:44 -07:00
commit b0a9ba13ff
3 changed files with 5 additions and 1 deletions
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1
lib/Kconfig.ubsan
View file

@ -4,6 +4,7 @@ config ARCH_HAS_UBSAN
menuconfig UBSAN
bool "Undefined behaviour sanity checker"
depends on ARCH_HAS_UBSAN
help
This option enables the Undefined Behaviour sanity checker.
Compile-time instrumentation is used to detect various undefined

2
lib/fortify_kunit.c
View file

@ -990,7 +990,7 @@ static void fortify_test_memcmp(struct kunit *test)
KUNIT_ASSERT_EQ(test, memcmp(one, two, one_len), 0);
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0);
/* Still in bounds, but no longer matching. */
KUNIT_ASSERT_EQ(test, memcmp(one, two, one_len + 1), -32);
KUNIT_ASSERT_LT(test, memcmp(one, two, one_len + 1), 0);
KUNIT_EXPECT_EQ(test, fortify_read_overflows, 0);
/* Catch too-large ranges. */

3
security/loadpin/Kconfig
View file

@ -14,6 +14,9 @@ config SECURITY_LOADPIN
config SECURITY_LOADPIN_ENFORCE
bool "Enforce LoadPin at boot"
depends on SECURITY_LOADPIN
# Module compression breaks LoadPin unless modules are decompressed in
# the kernel.
depends on !MODULES || (MODULE_COMPRESS_NONE || MODULE_DECOMPRESS)
help
If selected, LoadPin will enforce pinning at boot. If not
selected, it can be enabled at boot with the kernel parameter