| // SPDX-License-Identifier: GPL-2.0-only |
| /// |
| /// From Documentation/filesystems/sysfs.rst: |
| /// show() must not use snprintf() when formatting the value to be |
| /// returned to user space. If you can guarantee that an overflow |
| /// will never happen you can use sprintf() otherwise you must use |
| /// scnprintf(). |
| /// |
| // Confidence: High |
| // Copyright: (C) 2020 Denis Efremov ISPRAS |
| // Options: --no-includes --include-headers |
| // |
| |
| virtual report |
| virtual org |
| virtual context |
| virtual patch |
| |
| @r depends on !patch@ |
| identifier show, dev, attr, buf; |
| position p; |
| @@ |
| |
| ssize_t show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| <... |
| * return snprintf@p(...); |
| ...> |
| } |
| |
| @rp depends on patch@ |
| identifier show, dev, attr, buf; |
| @@ |
| |
| ssize_t show(struct device *dev, struct device_attribute *attr, char *buf) |
| { |
| <... |
| return |
| - snprintf |
| + scnprintf |
| (...); |
| ...> |
| } |
| |
| @script: python depends on report@ |
| p << r.p; |
| @@ |
| |
| coccilib.report.print_report(p[0], "WARNING: use scnprintf or sprintf") |
| |
| @script: python depends on org@ |
| p << r.p; |
| @@ |
| |
| coccilib.org.print_todo(p[0], "WARNING: use scnprintf or sprintf") |
