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| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-31 10:44:53 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-31 10:44:53 -0400 |
| commit | cf39d37539068d53e015d8b4f1dcf42c65306b0d (patch) | |
| tree | c8dcbbc3a5c92beee82e83e2a2b597f328a919a6 /arch/csky/include/asm/stackprotector.h | |
| parent | 830948eb68265ac7f3f364aa9801550feafec0d6 (diff) | |
| parent | 463050599742a89e0508355e626e032e8d0dab8d (diff) | |
| download | linux-cf39d37539068d53e015d8b4f1dcf42c65306b0d.tar.gz linux-cf39d37539068d53e015d8b4f1dcf42c65306b0d.tar.bz2 linux-cf39d37539068d53e015d8b4f1dcf42c65306b0d.zip | |
Merge tag 'kvmarm-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD
KVM/arm updates for Linux 5.7
- GICv4.1 support
- 32bit host removal
Diffstat (limited to 'arch/csky/include/asm/stackprotector.h')
| -rw-r--r-- | arch/csky/include/asm/stackprotector.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/csky/include/asm/stackprotector.h b/arch/csky/include/asm/stackprotector.h new file mode 100644 index 000000000000..d7cd4e51edd9 --- /dev/null +++ b/arch/csky/include/asm/stackprotector.h @@ -0,0 +1,29 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef _ASM_STACKPROTECTOR_H +#define _ASM_STACKPROTECTOR_H 1 + +#include <linux/random.h> +#include <linux/version.h> + +extern unsigned long __stack_chk_guard; + +/* + * Initialize the stackprotector canary value. + * + * NOTE: this must only be called from functions that never return, + * and it must always be inlined. + */ +static __always_inline void boot_init_stack_canary(void) +{ + unsigned long canary; + + /* Try to get a semi random initial value. */ + get_random_bytes(&canary, sizeof(canary)); + canary ^= LINUX_VERSION_CODE; + canary &= CANARY_MASK; + + current->stack_canary = canary; + __stack_chk_guard = current->stack_canary; +} + +#endif /* __ASM_SH_STACKPROTECTOR_H */ |