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mips: copy_from_user() must zero the destination on access_ok() failure

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Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2016-08-20 16:18:53 -04:00
parent 05d9d0b96e
commit e69d700535
1 changed files with 3 additions and 0 deletions
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3
arch/mips/include/asm/uaccess.h
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@ -14,6 +14,7 @@
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/thread_info.h>
#include <linux/string.h>
#include <asm/asm-eva.h>
/*
@ -1170,6 +1171,8 @@ extern size_t __copy_in_user_eva(void *__to, const void *__from, size_t __n);
__cu_len = __invoke_copy_from_user(__cu_to, \
__cu_from, \
__cu_len); \
} else { \
memset(__cu_to, 0, __cu_len); \
} \
} \
__cu_len; \