diff options
| author | Kees Cook <keescook@chromium.org> | 2017-08-16 17:09:13 -0400 |
|---|---|---|
| committer | Kees Cook <keescook@chromium.org> | 2018-01-15 15:08:06 -0500 |
| commit | 08626a6056aad824c43d34ce587ab2b01f49d1a4 (patch) | |
| tree | cbf024b04979925f657fb5fead7d10edac2efbe7 /arch/arm/Kconfig | |
| parent | 9e8084d3f761413b2d58b2625bc6e332eab2bfce (diff) | |
arm: Implement thread_struct whitelist for hardened usercopy
While ARM32 carries FPU state in the thread structure that is saved and
restored during signal handling, it doesn't need to declare a usercopy
whitelist, since existing accessors are all either using a bounce buffer
(for which whitelisting isn't checking the slab), are statically sized
(which will bypass the hardened usercopy check), or both.
Cc: Russell King <linux@armlinux.org.uk>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: "Peter Zijlstra (Intel)" <peterz@infradead.org>
Cc: linux-arm-kernel@lists.infradead.org
Signed-off-by: Kees Cook <keescook@chromium.org>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 51c8df561077..3ea00d65f35d 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig | |||
| @@ -50,6 +50,7 @@ config ARM | |||
| 50 | select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU | 50 | select HAVE_ARCH_KGDB if !CPU_ENDIAN_BE32 && MMU |
| 51 | select HAVE_ARCH_MMAP_RND_BITS if MMU | 51 | select HAVE_ARCH_MMAP_RND_BITS if MMU |
| 52 | select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) | 52 | select HAVE_ARCH_SECCOMP_FILTER if (AEABI && !OABI_COMPAT) |
| 53 | select HAVE_ARCH_THREAD_STRUCT_WHITELIST | ||
| 53 | select HAVE_ARCH_TRACEHOOK | 54 | select HAVE_ARCH_TRACEHOOK |
| 54 | select HAVE_ARM_SMCCC if CPU_V7 | 55 | select HAVE_ARM_SMCCC if CPU_V7 |
| 55 | select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32 | 56 | select HAVE_EBPF_JIT if !CPU_ENDIAN_BE32 |