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authorJoe Lawrence <joe.lawrence@stratus.com>2014-06-25 17:06:12 -0400
committerChristoph Hellwig <hch@lst.de>2014-07-25 17:16:57 -0400
commit3e67c459d0ac945ac09639d85de299e65317aefe (patch)
tree2dcf88d2311361e90e102d1c74b757c0d23f0fb5 /drivers/message/fusion/mptctl.c
parent5074b1b60edd47e0ce4485e57990f7ca75c3e67e (diff)
downloadlinux-3e67c459d0ac945ac09639d85de299e65317aefe.tar.bz2
mptfusion: use memdup_user
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>
Diffstat (limited to 'drivers/message/fusion/mptctl.c')
-rw-r--r--drivers/message/fusion/mptctl.c18
1 files changed, 5 insertions, 13 deletions
diff --git a/drivers/message/fusion/mptctl.c b/drivers/message/fusion/mptctl.c
index 8a050e885688..b0a892a2bf1b 100644
--- a/drivers/message/fusion/mptctl.c
+++ b/drivers/message/fusion/mptctl.c
@@ -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) ||