>From the kernel documentation: > For reduced kernel memory fragmentation, slab caches can be > merged when they share the same size and other characteristics. > This carries a risk of kernel heap overflows being able to > overwrite objects from merged caches (and more easily control > cache layout), which makes such heap attacks easier to exploit > by attackers. By keeping caches unmerged, these kinds of exploits > can usually only damage objects in the same cache. [...] Thus, it is more sane to leave slab merging disabled. KSPP and ClipOS recommend this as well. Signed-off-by: Peter Müller --- config/kernel/kernel.config.aarch64-ipfire | 2 +- config/kernel/kernel.config.armv6l-ipfire | 2 +- config/kernel/kernel.config.riscv64-ipfire | 2 +- config/kernel/kernel.config.x86_64-ipfire | 2 +- 4 files changed, 4 insertions(+), 4 deletions(-) diff --git a/config/kernel/kernel.config.aarch64-ipfire b/config/kernel/kernel.config.aarch64-ipfire index 9232335ff..023c3d5aa 100644 --- a/config/kernel/kernel.config.aarch64-ipfire +++ b/config/kernel/kernel.config.aarch64-ipfire @@ -247,7 +247,7 @@ CONFIG_VM_EVENT_COUNTERS=y # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set -CONFIG_SLAB_MERGE_DEFAULT=y +# CONFIG_SLAB_MERGE_DEFAULT is not set CONFIG_SLAB_FREELIST_RANDOM=y CONFIG_SLAB_FREELIST_HARDENED=y CONFIG_SHUFFLE_PAGE_ALLOCATOR=y diff --git a/config/kernel/kernel.config.armv6l-ipfire b/config/kernel/kernel.config.armv6l-ipfire index dc0aee51b..b4587826e 100644 --- a/config/kernel/kernel.config.armv6l-ipfire +++ b/config/kernel/kernel.config.armv6l-ipfire @@ -250,7 +250,7 @@ CONFIG_VM_EVENT_COUNTERS=y # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set -CONFIG_SLAB_MERGE_DEFAULT=y +# CONFIG_SLAB_MERGE_DEFAULT is not set CONFIG_SLAB_FREELIST_RANDOM=y CONFIG_SLAB_FREELIST_HARDENED=y CONFIG_SHUFFLE_PAGE_ALLOCATOR=y diff --git a/config/kernel/kernel.config.riscv64-ipfire b/config/kernel/kernel.config.riscv64-ipfire index 0801f4389..fb7cda4dd 100644 --- a/config/kernel/kernel.config.riscv64-ipfire +++ b/config/kernel/kernel.config.riscv64-ipfire @@ -230,7 +230,7 @@ CONFIG_VM_EVENT_COUNTERS=y # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set -CONFIG_SLAB_MERGE_DEFAULT=y +# CONFIG_SLAB_MERGE_DEFAULT is not set CONFIG_SLAB_FREELIST_RANDOM=y CONFIG_SLAB_FREELIST_HARDENED=y CONFIG_SHUFFLE_PAGE_ALLOCATOR=y diff --git a/config/kernel/kernel.config.x86_64-ipfire b/config/kernel/kernel.config.x86_64-ipfire index 40975b5fc..d3792cbb7 100644 --- a/config/kernel/kernel.config.x86_64-ipfire +++ b/config/kernel/kernel.config.x86_64-ipfire @@ -270,7 +270,7 @@ CONFIG_VM_EVENT_COUNTERS=y # CONFIG_SLAB is not set CONFIG_SLUB=y # CONFIG_SLOB is not set -CONFIG_SLAB_MERGE_DEFAULT=y +# CONFIG_SLAB_MERGE_DEFAULT is not set CONFIG_SLAB_FREELIST_RANDOM=y CONFIG_SLAB_FREELIST_HARDENED=y CONFIG_SHUFFLE_PAGE_ALLOCATOR=y -- 2.35.3