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| author | Muhammad Falak R Wani <falakreyaz@gmail.com> | 2016-05-20 17:53:28 +0530 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-25 10:40:33 -0700 |
| commit | 9b6519009dbe2b361a73284ea0fd2e9b86aeef4d (patch) | |
| tree | bdadbfcd6ef5a9ad21f685804b67b19d64463672 /drivers/tty/vt | |
| parent | a7cfaf165ed0f0b1e5e8636f9f28843b2b90139a (diff) | |
| download | linux-9b6519009dbe2b361a73284ea0fd2e9b86aeef4d.tar.gz linux-9b6519009dbe2b361a73284ea0fd2e9b86aeef4d.tar.bz2 linux-9b6519009dbe2b361a73284ea0fd2e9b86aeef4d.zip | |
tty/vt/keyboard: use memdup_user().
Use memdup_user to duplicate a memory region from user-space to
kernel-space, instead of open coding using kmalloc & copy_from_user.
Signed-off-by: Muhammad Falak R Wani <falakreyaz@gmail.com>
Reviewed-by: Samuel Thibault <samuel.thibault@ens-lyon.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/tty/vt')
| -rw-r--r-- | drivers/tty/vt/keyboard.c | 14 |
1 files changed, 4 insertions, 10 deletions
diff --git a/drivers/tty/vt/keyboard.c b/drivers/tty/vt/keyboard.c index cd08c103eb47..89a7ab007ff4 100644 --- a/drivers/tty/vt/keyboard.c +++ b/drivers/tty/vt/keyboard.c @@ -1745,16 +1745,10 @@ int vt_do_diacrit(unsigned int cmd, void __user *udp, int perm) return -EINVAL; if (ct) { - buf = kmalloc(ct * sizeof(struct kbdiacruc), - GFP_KERNEL); - if (buf == NULL) - return -ENOMEM; - - if (copy_from_user(buf, a->kbdiacruc, - ct * sizeof(struct kbdiacruc))) { - kfree(buf); - return -EFAULT; - } + buf = memdup_user(a->kbdiacruc, + ct * sizeof(struct kbdiacruc)); + if (IS_ERR(buf)) + return PTR_ERR(buf); } spin_lock_irqsave(&kbd_event_lock, flags); if (ct) |