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| author | Max Filippov <jcmvbkbc@gmail.com> | 2017-12-17 23:43:15 +0100 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2017-12-18 00:34:57 +0100 |
| commit | 57358ba9564a0520f870dc14a0f91e7dacc18236 (patch) | |
| tree | 616be15e6bbe43bbf7539a359b3485b070f62920 /arch/xtensa/include/asm/uaccess.h | |
| parent | xtensa: use __memset in __xtensa_clear_user (diff) | |
| download | linux-57358ba9564a0520f870dc14a0f91e7dacc18236.tar.xz linux-57358ba9564a0520f870dc14a0f91e7dacc18236.zip | |
xtensa: use generic strncpy_from_user with KASAN
This enables KASAN check of the destination buffer.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa/include/asm/uaccess.h')
| -rw-r--r-- | arch/xtensa/include/asm/uaccess.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h index 18bbe1caad94..f1158b4c629c 100644 --- a/arch/xtensa/include/asm/uaccess.h +++ b/arch/xtensa/include/asm/uaccess.h @@ -44,6 +44,8 @@ #define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size))) #define access_ok(type, addr, size) __access_ok((unsigned long)(addr), (size)) +#define user_addr_max() (uaccess_kernel() ? ~0UL : TASK_SIZE) + /* * These are the main single-value transfer routines. They * automatically use the right size if we just have the right pointer @@ -277,6 +279,8 @@ clear_user(void *addr, unsigned long size) #define __clear_user __xtensa_clear_user +#ifndef CONFIG_GENERIC_STRNCPY_FROM_USER + extern long __strncpy_user(char *, const char *, long); static inline long @@ -286,6 +290,9 @@ strncpy_from_user(char *dst, const char *src, long count) return __strncpy_user(dst, src, count); return -EFAULT; } +#else +long strncpy_from_user(char *dst, const char *src, long count); +#endif /* * Return the size of a string (including the ending 0!) |