diff options
| author | Xi Wang <xi.wang@gmail.com> | 2011-11-29 21:52:46 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-11-30 19:29:40 +0900 |
| commit | 2a58b19fd97c7368c03c027419a2aeb26313adad (patch) | |
| tree | 3f264e57e93835e04d88b19c6207b58048f1db51 /drivers/staging/vt6655/ioctl.c | |
| parent | fee6433bdd1a4ab403a79069eda9a38da9903243 (diff) | |
staging: vt6655: integer overflows in private_ioctl()
There are two potential integer overflows in private_ioctl() if
userspace passes in a large sList.uItem / sNodeList.uItem. The
subsequent call to kmalloc() would allocate a small buffer, leading
to a memory corruption.
Reported-by: Dan Rosenberg <drosenberg@vsecurity.com>
Signed-off-by: Xi Wang <xi.wang@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/vt6655/ioctl.c')
| -rw-r--r-- | drivers/staging/vt6655/ioctl.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/staging/vt6655/ioctl.c b/drivers/staging/vt6655/ioctl.c index 432a20993c6..7fd5cc5a55f 100644 --- a/drivers/staging/vt6655/ioctl.c +++ b/drivers/staging/vt6655/ioctl.c @@ -300,6 +300,10 @@ int private_ioctl(PSDevice pDevice, struct ifreq *rq) result = -EFAULT; break; } + if (sList.uItem > (ULONG_MAX - sizeof(SBSSIDList)) / sizeof(SBSSIDItem)) { + result = -EINVAL; + break; + } pList = (PSBSSIDList)kmalloc(sizeof(SBSSIDList) + (sList.uItem * sizeof(SBSSIDItem)), (int)GFP_ATOMIC); if (pList == NULL) { result = -ENOMEM; @@ -571,6 +575,10 @@ int private_ioctl(PSDevice pDevice, struct ifreq *rq) result = -EFAULT; break; } + if (sNodeList.uItem > (ULONG_MAX - sizeof(SNodeList)) / sizeof(SNodeItem)) { + result = -EINVAL; + break; + } pNodeList = (PSNodeList)kmalloc(sizeof(SNodeList) + (sNodeList.uItem * sizeof(SNodeItem)), (int)GFP_ATOMIC); if (pNodeList == NULL) { result = -ENOMEM; |