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firmware: tegra: Changes for v6.1-rc1

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A simple cleanup for user memory usage in the BPMP debugfs support.
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Merge tag 'tegra-for-6.1-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux into arm/drivers

firmware: tegra: Changes for v6.1-rc1

A simple cleanup for user memory usage in the BPMP debugfs support.

* tag 'tegra-for-6.1-firmware' of git://git.kernel.org/pub/scm/linux/kernel/git/tegra/linux:
  firmware: tegra: Switch over to memdup_user()

Link: https://lore.kernel.org/r/20220916101957.1635854-3-thierry.reding@gmail.com
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-09-23 17:33:38 +02:00
commit a30f202fdc
1 changed files with 3 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/firmware/tegra/bpmp-debugfs.c
View File

@ -377,18 +377,11 @@ static ssize_t bpmp_debug_store(struct file *file, const char __user *buf,
if (!filename)
return -ENOENT;
databuf = kmalloc(count, GFP_KERNEL);
if (!databuf)
return -ENOMEM;
if (copy_from_user(databuf, buf, count)) {
err = -EFAULT;
goto free_ret;
}
databuf = memdup_user(buf, count);
if (IS_ERR(databuf))
return PTR_ERR(databuf);
err = mrq_debug_write(bpmp, filename, databuf, count);
free_ret:
kfree(databuf);
return err ?: count;