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authorLinus Torvalds <torvalds@linux-foundation.org>2016-10-15 04:19:05 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-10-15 04:19:05 +0300
commitb26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586 (patch)
tree3fd57787765f05a19b85b384bd2a68cb4f9276d4 /arch/alpha/include
parent87dbe42a16b654e33665756c63e96c0fa73eb003 (diff)
parent2692a71bbd40160165e89d5505c5c28144ec5a42 (diff)
downloadlinux-b26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586.tar.xz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull more misc uaccess and vfs updates from Al Viro: "The rest of the stuff from -next (more uaccess work) + assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: score: traps: Add missing include file to fix build error fs/super.c: don't fool lockdep in freeze_super() and thaw_super() paths fs/super.c: fix race between freeze_super() and thaw_super() overlayfs: Fix setting IOP_XATTR flag iov_iter: kernel-doc import_iovec() and rw_copy_check_uvector() blackfin: no access_ok() for __copy_{to,from}_user() arm64: don't zero in __copy_from_user{,_inatomic} arm: don't zero in __copy_from_user_inatomic()/__copy_from_user() arc: don't leak bits of kernel stack into coredump alpha: get rid of tail-zeroing in __copy_user()
Diffstat (limited to 'arch/alpha/include')
-rw-r--r--arch/alpha/include/asm/uaccess.h9
1 files changed, 5 insertions, 4 deletions
diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h
index 466e42e96bfa..94f587535dee 100644
--- a/arch/alpha/include/asm/uaccess.h
+++ b/arch/alpha/include/asm/uaccess.h
@@ -396,11 +396,12 @@ copy_to_user(void __user *to, const void *from, long n)
extern inline long
copy_from_user(void *to, const void __user *from, long n)
{
+ long res = n;
if (likely(__access_ok((unsigned long)from, n, get_fs())))
- n = __copy_tofrom_user_nocheck(to, (__force void *)from, n);
- else
- memset(to, 0, n);
- return n;
+ res = __copy_from_user_inatomic(to, from, n);
+ if (unlikely(res))
+ memset(to + (n - res), 0, res);
+ return res;
}
extern void __do_clear_user(void);