[PATCH] ima: use memdup_user_nul
From: Geliang Tang <hidden>
Date: 2017-05-06 15:40:46
Use memdup_user_nul() helper instead of open-coding to simplify the code. Signed-off-by: Geliang Tang <redacted> --- security/integrity/ima/ima_fs.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-)
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index ca303e5..ad491c5 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c@@ -323,16 +323,11 @@ static ssize_t ima_write_policy(struct file *file, const char __user *buf, if (*ppos != 0) goto out; - result = -ENOMEM; - data = kmalloc(datalen + 1, GFP_KERNEL); - if (!data) + data = memdup_user_nul(buf, datalen); + if (IS_ERR(data)) { + result = PTR_ERR(data); goto out; - - *(data + datalen) = '\0'; - - result = -EFAULT; - if (copy_from_user(data, buf, datalen)) - goto out_free; + } result = mutex_lock_interruptible(&ima_write_mutex); if (result < 0)
--
2.9.3
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