"> AR# 53926: PetaLinux v12.12 - Kernel API: strncpy_from_user() incorrect behavior on Microblaze

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  3. AR# 53926: PetaLinux v12.12 - Kernel API: strncpy_from_user() incorrect behavior on Microblaze

AR# 53926

PetaLinux v12.12 - Kernel API: strncpy_from_user() incorrect behavior on Microblaze

Description

When compiling a third-party Kernel module against Petalinux for Microblaze, there seems to be a deviation of the behavior of function strncpy_from_user() to the description of the Kernel API According Kernel.org: http://www.kernel.org/doc/htmldocs/kernel-api/API-strncpy-from-user.html
The function strncpy_from_user() should return the length of the string (not including the trailing NULL). However, the length of the string including the trailing NULL is returned.
How can I fix this?

Solution

This is a known issue that has been fixed in the latest version of the PetaLinux. However, if you believe you are seeing the issue, please patchthe uaccess_old.S into your environment.

Attachments

Associated Attachments

Name File Size File Type
AR53926.zip 2 KB ZIP
AR# 53926
Date 03/02/2013
Status Active
Type General Article
Tools
  • EDK - 14.4