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| author | Wen Yang <wen.yang99@zte.com.cn> | 2018-12-10 19:36:07 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-12-19 10:26:31 +0100 |
| commit | 8995fa1e1c9bcb76d407b860770e640b60ed8c76 (patch) | |
| tree | b72a5a69c9b9a0fbacd858b2cd795d0e89cb720d /drivers/misc/vmw_vmci | |
| parent | f88fd666051b08eb3f3118e2dd8508bf0247af4c (diff) | |
| download | linux-8995fa1e1c9bcb76d407b860770e640b60ed8c76.tar.bz2 | |
VMCI: Use memdup_user() rather than duplicating its implementation
Reuse existing functionality from memdup_user() instead of keeping
duplicate source code.
This issue was detected by using the Coccinelle software.
Signed-off-by: Wen Yang <wen.yang99@zte.com.cn>
CC: Arnd Bergmann <arnd@arndb.de>
CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: linux-kernel@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/misc/vmw_vmci')
| -rw-r--r-- | drivers/misc/vmw_vmci/vmci_host.c | 18 |
1 files changed, 4 insertions, 14 deletions
diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index edfffc9699ba..5da1f3e3f997 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -750,19 +750,10 @@ static int vmci_host_do_ctx_set_cpt_state(struct vmci_host_dev *vmci_host_dev, if (copy_from_user(&set_info, uptr, sizeof(set_info))) return -EFAULT; - cpt_buf = kmalloc(set_info.buf_size, GFP_KERNEL); - if (!cpt_buf) { - vmci_ioctl_err( - "cannot allocate memory to set cpt state (type=%d)\n", - set_info.cpt_type); - return -ENOMEM; - } - - if (copy_from_user(cpt_buf, (void __user *)(uintptr_t)set_info.cpt_buf, - set_info.buf_size)) { - retval = -EFAULT; - goto out; - } + cpt_buf = memdup_user((void __user *)(uintptr_t)set_info.cpt_buf, + set_info.buf_size); + if (IS_ERR(cpt_buf)) + return PTR_ERR(cpt_buf); cid = vmci_ctx_get_id(vmci_host_dev->context); set_info.result = vmci_ctx_set_chkpt_state(cid, set_info.cpt_type, @@ -770,7 +761,6 @@ static int vmci_host_do_ctx_set_cpt_state(struct vmci_host_dev *vmci_host_dev, retval = copy_to_user(uptr, &set_info, sizeof(set_info)) ? -EFAULT : 0; -out: kfree(cpt_buf); return retval; } |