diff options
Diffstat (limited to 'arch/arm64/include/asm/uaccess.h')
| -rw-r--r-- | arch/arm64/include/asm/uaccess.h | 17 |
1 files changed, 16 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h index 8f0a1de11e4a..fc0f9eb66039 100644 --- a/arch/arm64/include/asm/uaccess.h +++ b/arch/arm64/include/asm/uaccess.h @@ -45,6 +45,9 @@ static inline void set_fs(mm_segment_t fs) { current_thread_info()->addr_limit = fs; + /* On user-mode return, check fs is correct */ + set_thread_flag(TIF_FSCHECK); + /* * Enable/disable UAO so that copy_to_user() etc can access * kernel memory with the unprivileged instructions. @@ -69,7 +72,7 @@ static inline void set_fs(mm_segment_t fs) */ #define __range_ok(addr, size) \ ({ \ - unsigned long __addr = (unsigned long __force)(addr); \ + unsigned long __addr = (unsigned long)(addr); \ unsigned long flag, roksum; \ __chk_user_ptr(addr); \ asm("adds %1, %1, %3; ccmp %1, %4, #2, cc; cset %0, ls" \ @@ -347,4 +350,16 @@ extern long strncpy_from_user(char *dest, const char __user *src, long count); extern __must_check long strnlen_user(const char __user *str, long n); +#ifdef CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE +struct page; +void memcpy_page_flushcache(char *to, struct page *page, size_t offset, size_t len); +extern unsigned long __must_check __copy_user_flushcache(void *to, const void __user *from, unsigned long n); + +static inline int __copy_from_user_flushcache(void *dst, const void __user *src, unsigned size) +{ + kasan_check_write(dst, size); + return __copy_user_flushcache(dst, src, size); +} +#endif + #endif /* __ASM_UACCESS_H */ |