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| author | Al Viro <viro@zeniv.linux.org.uk> | 2020-02-18 13:07:41 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2020-05-29 16:11:49 -0400 |
| commit | 76666be8c9df456373a4e00ce51d2547f1d90627 (patch) | |
| tree | a1245728e1f97d17492d19b2de4f31ddcd500f85 | |
| parent | 77a8710ba7ef7ffcb71f0618bddf78c1b04f01d3 (diff) | |
| download | microwatt-76666be8c9df456373a4e00ce51d2547f1d90627.tar.gz | |
sparc: switch to providing csum_and_copy_from_user()
sparc64 already is equivalent to that (trivial access_ok());
add it into sparc32 csum_partial_copy_from_user() and we can
rename both to csum_and_copy_fromUser() and be done with that.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| -rw-r--r-- | arch/sparc/include/asm/checksum.h | 1 | ||||
| -rw-r--r-- | arch/sparc/include/asm/checksum_32.h | 8 | ||||
| -rw-r--r-- | arch/sparc/include/asm/checksum_64.h | 2 |
3 files changed, 9 insertions, 2 deletions
diff --git a/arch/sparc/include/asm/checksum.h b/arch/sparc/include/asm/checksum.h index c3be56e2e768a7..a6256cb6fc5cc4 100644 --- a/arch/sparc/include/asm/checksum.h +++ b/arch/sparc/include/asm/checksum.h @@ -1,6 +1,7 @@ /* SPDX-License-Identifier: GPL-2.0 */ #ifndef ___ASM_SPARC_CHECKSUM_H #define ___ASM_SPARC_CHECKSUM_H +#define _HAVE_ARCH_COPY_AND_CSUM_FROM_USER #if defined(__sparc__) && defined(__arch64__) #include <asm/checksum_64.h> #else diff --git a/arch/sparc/include/asm/checksum_32.h b/arch/sparc/include/asm/checksum_32.h index 450ddfb444c879..479a0b812af50a 100644 --- a/arch/sparc/include/asm/checksum_32.h +++ b/arch/sparc/include/asm/checksum_32.h @@ -60,7 +60,7 @@ csum_partial_copy_nocheck(const void *src, void *dst, int len, __wsum sum) } static inline __wsum -csum_partial_copy_from_user(const void __user *src, void *dst, int len, +csum_and_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err) { register unsigned long ret asm("o0") = (unsigned long)src; @@ -68,6 +68,12 @@ csum_partial_copy_from_user(const void __user *src, void *dst, int len, register int l asm("g1") = len; register __wsum s asm("g7") = sum; + if (unlikely(!access_ok(src, len))) { + if (len) + *err = -EFAULT; + return sum; + } + __asm__ __volatile__ ( ".section __ex_table,#alloc\n\t" ".align 4\n\t" diff --git a/arch/sparc/include/asm/checksum_64.h b/arch/sparc/include/asm/checksum_64.h index e52450930e4eac..0fa4433f5662ba 100644 --- a/arch/sparc/include/asm/checksum_64.h +++ b/arch/sparc/include/asm/checksum_64.h @@ -46,7 +46,7 @@ long __csum_partial_copy_from_user(const void __user *src, __wsum sum); static inline __wsum -csum_partial_copy_from_user(const void __user *src, +csum_and_copy_from_user(const void __user *src, void *dst, int len, __wsum sum, int *err) { |