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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 /arch/sparc/include/asm/checksum_32.h | |
| parent | parisc: turn csum_partial_copy_from_user() into csum_and_copy_from_user() (diff) | |
| download | linux-dev-76666be8c9df456373a4e00ce51d2547f1d90627.tar.xz linux-dev-76666be8c9df456373a4e00ce51d2547f1d90627.zip | |
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>
Diffstat (limited to 'arch/sparc/include/asm/checksum_32.h')
| -rw-r--r-- | arch/sparc/include/asm/checksum_32.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/checksum_32.h b/arch/sparc/include/asm/checksum_32.h index 450ddfb444c8..479a0b812af5 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" |