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accel/ivpu: Use effective buffer size for zero terminator

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Use the effective written size instead of original size as index for zero
termination. If the input from user-space is to larger and the input is
truncated, the original size is out-of-bound.
Since there is an upfront size check here, the change is for consistency.

Signed-off-by: Markus Burri <markus.burri@mt.com>
Reviewed-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Signed-off-by: Jacek Lawrynowicz <jacek.lawrynowicz@linux.intel.com>
Link: https://lore.kernel.org/r/20250508130612.82270-3-markus.burri@mt.com
This commit is contained in:
Markus Burri 2025-05-08 15:06:08 +02:00 • committed by Jacek Lawrynowicz
parent 9c1798259b
commit 2f0c6fceae
1 changed files with 1 additions and 1 deletions
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2
drivers/accel/ivpu/ivpu_debugfs.c
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@ -455,7 +455,7 @@ priority_bands_fops_write(struct file *file, const char __user *user_buf, size_t
if (ret < 0)
return ret;
buf[size] = '\0';
buf[ret] = '\0';
ret = sscanf(buf, "%u %u %u %u", &band, &grace_period, &process_grace_period,
&process_quantum);
if (ret != 4)