Kernel: Set CONFIG_ARCH_MMAP_RND_BITS to 32 bits

This follows a recommendation by ClipOS, making ASLR bypassing attempts
harder.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>
Reviewed-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire
index 6728fa7f35763f166acc6b942d083ba59d6e2d33..4205aa5bc04211a0d0d630c31ffe1e4d1bf342c8 100644 (file)
--- a/config/kernel/kernel.config.aarch64-ipfire
+++ b/config/kernel/kernel.config.aarch64-ipfire
@@ -702,7 +702,7 @@ CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
-CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_ARCH_MMAP_RND_BITS=32
 CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
 CONFIG_ARCH_MMAP_RND_COMPAT_BITS=11
 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y

diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire
index d8482de9286767d9e0e2123ac41cd8286d3db94b..ef36b8e22148edff281a7a41451b9207982506e0 100644 (file)
--- a/config/kernel/kernel.config.armv6l-ipfire
+++ b/config/kernel/kernel.config.armv6l-ipfire
@@ -778,7 +778,7 @@ CONFIG_MODULES_USE_ELF_REL=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
 CONFIG_HAVE_EXIT_THREAD=y
-CONFIG_ARCH_MMAP_RND_BITS=8
+CONFIG_ARCH_MMAP_RND_BITS=32
 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
 CONFIG_CLONE_BACKWARDS=y
 CONFIG_OLD_SIGSUSPEND3=y

diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire
index 73911b2ab91b39cb86adb6dfb1a16d66da4cc399..d8045c15c9489013e8e96dd886194398c28a0735 100644 (file)
--- a/config/kernel/kernel.config.riscv64-ipfire
+++ b/config/kernel/kernel.config.riscv64-ipfire
@@ -388,7 +388,7 @@ CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
 CONFIG_MODULES_USE_ELF_RELA=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
-CONFIG_ARCH_MMAP_RND_BITS=18
+CONFIG_ARCH_MMAP_RND_BITS=32
 CONFIG_ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT=y
 CONFIG_CLONE_BACKWARDS=y
 CONFIG_COMPAT_32BIT_TIME=y

diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire
index 0f322826eecf6435e4a9623613ffeb9a828d8b07..b1481554536d67414c54f44593df4d9ffbd4517d 100644 (file)
--- a/config/kernel/kernel.config.x86_64-ipfire
+++ b/config/kernel/kernel.config.x86_64-ipfire
@@ -742,7 +742,7 @@ CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK=y
 CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
 CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
 CONFIG_HAVE_EXIT_THREAD=y
-CONFIG_ARCH_MMAP_RND_BITS=28
+CONFIG_ARCH_MMAP_RND_BITS=32
 CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
 CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8
 CONFIG_HAVE_ARCH_COMPAT_MMAP_BASES=y