diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-14 18:19:05 -0700 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-10-14 18:19:05 -0700 |
commit | b26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586 (patch) | |
tree | 3fd57787765f05a19b85b384bd2a68cb4f9276d4 /arch/alpha/include | |
parent | 87dbe42a16b654e33665756c63e96c0fa73eb003 (diff) | |
parent | 2692a71bbd40160165e89d5505c5c28144ec5a42 (diff) | |
download | linux-stable-b26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586.tar.gz linux-stable-b26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586.tar.bz2 linux-stable-b26b5ef5ec7eab0e1d84c5b281e87b2f2a5e0586.zip |
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.h | 9 |
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); |