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kernel: Remove CONFIG_COMPAT

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This removes support for executing old 32 bit applications on 64 bit ARM
and MIPS kernels.
On OpenWrt we normally compile all the user space applications on our
own and do not support third party binary only modules especial not 32
bit applications on 64 bit CPUs.

This reduces the attack surface on such systems and should also save
some memory.

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
This commit is contained in:
Hauke Mehrtens
2019-04-07 17:14:24 +02:00
parent 7099bf0926
commit 46af22de16
16 changed files with 3 additions and 75 deletions
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6
target/linux/malta/be64/config-default
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@@ -4,14 +4,10 @@ CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_ARCH_MMAP_RND_BITS=12
CONFIG_ARCH_MMAP_RND_BITS_MAX=18
CONFIG_ARCH_MMAP_RND_BITS_MIN=12
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=8
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_BINFMT_ELF32=y
CONFIG_BLOCK_COMPAT=y
CONFIG_COMPAT=y
CONFIG_COMPAT_NETLINK_MESSAGES=y
CONFIG_CPU_BIG_ENDIAN=y
# CONFIG_CPU_LITTLE_ENDIAN is not set
CONFIG_CPU_MIPS64=y
@@ -20,7 +16,6 @@ CONFIG_CPU_MIPSR1=y
CONFIG_CPU_SUPPORTS_64BIT_KERNEL=y
CONFIG_CPU_SUPPORTS_HUGEPAGES=y
CONFIG_HAVE_64BIT_ALIGNED_ACCESS=y
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE=y
CONFIG_HAVE_EBPF_JIT=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
@@ -33,6 +28,5 @@ CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_PCI_BUS_ADDR_T_64BIT=y
CONFIG_PGTABLE_LEVELS=3
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_SYS_SUPPORTS_HUGETLBFS=y
CONFIG_ZONE_DMA32=y