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| author | Al Viro <viro@zeniv.linux.org.uk> | 2016-08-20 16:18:53 -0400 |
|---|---|---|
| committer | Sasha Levin <alexander.levin@verizon.com> | 2016-10-05 22:40:20 -0400 |
| commit | c99e37cddc0bdc9e108d0c7e2287248711268fdf (patch) | |
| tree | 48f493b0ba8c85a0aac9428a0763612037ffc6f6 /arch | |
| parent | 09baa6b1ba17ac7168ad16daeb0f114dfac1cedc (diff) | |
| download | lwn-c99e37cddc0bdc9e108d0c7e2287248711268fdf.tar.gz lwn-c99e37cddc0bdc9e108d0c7e2287248711268fdf.zip | |
mips: copy_from_user() must zero the destination on access_ok() failure
[ Upstream commit e69d700535ac43a18032b3c399c69bf4639e89a2 ]
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <alexander.levin@verizon.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/include/asm/uaccess.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h index 22a5624e2fd2..953a75a8a8d2 100644 --- a/arch/mips/include/asm/uaccess.h +++ b/arch/mips/include/asm/uaccess.h @@ -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> /* @@ -1136,6 +1137,8 @@ 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; \ |