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ibmasm: Replace kzalloc() + copy_from_user() with memdup_user_nul() 

Replace kzalloc() followed by copy_from_user() with memdup_user_nul() to
improve and simplify remote_settings_file_write().

No functional changes intended.

Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Link: https://lore.kernel.org/r/20250905103247.423840-2-thorsten.blum@linux.dev
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Thorsten Blum 2025-09-05 12:32:44 +02:00 committed by Greg Kroah-Hartman
parent 5f8f84e286
commit 0c82fd9609
1 changed files with 3 additions and 9 deletions
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12
drivers/misc/ibmasm/ibmasmfs.c
View File

@ -525,15 +525,9 @@ static ssize_t remote_settings_file_write(struct file *file, const char __user *
if (*offset != 0)
return 0;
buff = kzalloc (count + 1, GFP_KERNEL);
if (!buff)
return -ENOMEM;
if (copy_from_user(buff, ubuff, count)) {
kfree(buff);
return -EFAULT;
}
buff = memdup_user_nul(ubuff, count);
if (IS_ERR(buff))
return PTR_ERR(buff);
value = simple_strtoul(buff, NULL, 10);
writel(value, address);