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authorLinus Torvalds <torvalds@linux-foundation.org>2016-09-14 18:35:05 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2016-09-14 18:35:05 +0200
commit77e5bdf9f7b2d20939c8d807f3e68778d6e1557a (patch)
tree377970d3aeae627a6a5ff9b78eaa5e8a1feca3cc /arch/sparc
parentMerge tag 'for-linus-4.8b-rc6-tag' of git://git.kernel.org/pub/scm/linux/kern... (diff)
parentavr32: fix copy_from_user() (diff)
downloadlinux-77e5bdf9f7b2d20939c8d807f3e68778d6e1557a.tar.xz
linux-77e5bdf9f7b2d20939c8d807f3e68778d6e1557a.zip
Merge branch 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull uaccess fixes from Al Viro: "Fixes for broken uaccess primitives - mostly lack of proper zeroing in copy_from_user()/get_user()/__get_user(), but for several architectures there's more (broken clear_user() on frv and strncpy_from_user() on hexagon)" * 'uaccess-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (28 commits) avr32: fix copy_from_user() microblaze: fix __get_user() microblaze: fix copy_from_user() m32r: fix __get_user() blackfin: fix copy_from_user() sparc32: fix copy_from_user() sh: fix copy_from_user() sh64: failing __get_user() should zero score: fix copy_from_user() and friends score: fix __get_user/get_user s390: get_user() should zero on failure ppc32: fix copy_from_user() parisc: fix copy_from_user() openrisc: fix copy_from_user() nios2: fix __get_user() nios2: copy_from_user() should zero the tail of destination mn10300: copy_from_user() should zero on access_ok() failure... mn10300: failing __get_user() and get_user() should zero mips: copy_from_user() must zero the destination on access_ok() failure ARC: uaccess: get_user to zero out dest in cause of fault ...
Diffstat (limited to 'arch/sparc')
-rw-r--r--arch/sparc/include/asm/uaccess_32.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index e722c510bb1b..ea55f86d7ccd 100644
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -266,8 +266,10 @@ static inline unsigned long copy_from_user(void *to, const void __user *from, un
if (n && __access_ok((unsigned long) from, n)) {
check_object_size(to, n, false);
return __copy_user((__force void __user *) to, from, n);
- } else
+ } else {
+ memset(to, 0, n);
return n;
+ }
}
static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)