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EVM: fix memory leak of temporary buffer 'temp'

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The allocation of 'temp' is not kfree'd and hence there is a memory
leak on each call of evm_read_xattrs.  Fix this by kfree'ing it
after copying data from it back to the user space buffer 'buf'.

Detected by CoverityScan, CID#1469386 ("Resource Leak")

Fixes: fa516b66a1 ("EVM: Allow runtime modification of the set of verified xattrs")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
This commit is contained in:
Colin Ian King 2018-05-27 23:15:02 +01:00 committed by Mimi Zohar
parent 53b626f903
commit 825b8650dc
1 changed files with 2 additions and 0 deletions
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2
security/integrity/evm/evm_secfs.c
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@ -158,6 +158,8 @@ static ssize_t evm_read_xattrs(struct file *filp, char __user *buf,
mutex_unlock(&xattr_list_mutex);
rc = simple_read_from_buffer(buf, count, ppos, temp, strlen(temp));
kfree(temp);
return rc;
}