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binder: Return EFAULT if we fail BINDER_ENABLE_ONEWAY_SPAM_DETECTION

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All the other ioctl paths return EFAULT in case the
copy_from_user/copy_to_user call fails, make oneway spam detection
follow the same paradigm.

Fixes: a7dc1e6f99 ("binder: tell userspace to dump current backtrace when detected oneway spamming")
Acked-by: Todd Kjos <tkjos@google.com>
Acked-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Luca Stefani <luca.stefani.ge1@gmail.com>
Link: https://lore.kernel.org/r/20210506193726.45118-1-luca.stefani.ge1@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Luca Stefani 2021-05-06 21:37:25 +02:00 committed by Greg Kroah-Hartman
parent 9183f01b5e
commit ced081a436
1 changed files with 1 additions and 1 deletions
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2
drivers/android/binder.c
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@ -4918,7 +4918,7 @@ static long binder_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
uint32_t enable;
if (copy_from_user(&enable, ubuf, sizeof(enable))) {
ret = -EINVAL;
ret = -EFAULT;
goto err;
}
binder_inner_proc_lock(proc);