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mptfusion: use memdup_user

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Let memdup_user handle the kmalloc, copy_from_user and error checking
kfree code.

Spotted by the following smatch (false positive) warning:

  drivers/message/fusion/mptctl.c:1369 mptctl_getiocinfo() warn:
    possible info leak 'karg'

Signed-off-by: Joe Lawrence <joe.lawrence@stratus.com>
Acked-by: Sreekanth Reddy <Sreekanth.Reddy@avagotech.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Joe Lawrence 2014-06-25 17:06:12 -04:00 committed by Christoph Hellwig
parent 5074b1b60e
commit 3e67c459d0
1 changed files with 5 additions and 13 deletions
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18
drivers/message/fusion/mptctl.c
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@ -1261,19 +1261,11 @@ mptctl_getiocinfo (unsigned long arg, unsigned int data_size)
else
return -EFAULT;
karg = kmalloc(data_size, GFP_KERNEL);
if (karg == NULL) {
printk(KERN_ERR MYNAM "%s::mpt_ioctl_iocinfo() @%d - no memory available!\n",
__FILE__, __LINE__);
return -ENOMEM;
}
if (copy_from_user(karg, uarg, data_size)) {
printk(KERN_ERR MYNAM "%s@%d::mptctl_getiocinfo - "
"Unable to read in mpt_ioctl_iocinfo struct @ %p\n",
__FILE__, __LINE__, uarg);
kfree(karg);
return -EFAULT;
karg = memdup_user(uarg, data_size);
if (IS_ERR(karg)) {
printk(KERN_ERR MYNAM "%s@%d::mpt_ioctl_iocinfo() - memdup_user returned error [%ld]\n",
__FILE__, __LINE__, PTR_ERR(karg));
return PTR_ERR(karg);
}
if (((iocnum = mpt_verify_adapter(karg->hdr.iocnum, &ioc)) < 0) ||