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| author |   Mao Han <han_mao@c-sky.com> | 2019-10-11 10:56:55 +0800 |
|---|---|---|
| committer |   Guo Ren <guoren@linux.alibaba.com> | 2020-02-21 15:43:24 +0800 |
| commit | 2f78c73f78c39dabc5c44ad8dd61fd6ec65636d6 (patch) | |
| tree | b9ba43f4bb9d709d612c77b3ed4c260a204a2d38 /arch/csky/kernel/process.c | |
| parent | MAINTAINERS: csky: Add mailing list for csky (diff) | |
| download | linux-dev-2f78c73f78c39dabc5c44ad8dd61fd6ec65636d6.tar.xz linux-dev-2f78c73f78c39dabc5c44ad8dd61fd6ec65636d6.zip | |
csky: Initial stack protector support
This is a basic -fstack-protector support without per-task canary
switching. The protector will report something like when stack
corruption is detected:
It's tested with strcpy local array overflow in sys_kill and get:
stack-protector: Kernel stack is corrupted in: sys_kill+0x23c/0x23c
TODO:
- Support task switch for different cannary
Signed-off-by: Mao Han <han_mao@c-sky.com>
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Diffstat (limited to '')
| -rw-r--r-- | arch/csky/kernel/process.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/csky/kernel/process.c b/arch/csky/kernel/process.c index f320d9248a22..5349cd8c0f30 100644 --- a/arch/csky/kernel/process.c +++ b/arch/csky/kernel/process.c @@ -16,6 +16,12 @@ struct cpuinfo_csky cpu_data[NR_CPUS]; +#ifdef CONFIG_STACKPROTECTOR +#include <linux/stackprotector.h> +unsigned long __stack_chk_guard __read_mostly; +EXPORT_SYMBOL(__stack_chk_guard); +#endif + asmlinkage void ret_from_fork(void); asmlinkage void ret_from_kernel_thread(void); |