[LU-6667] ll_getname allocates too big of a buffer

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.8.0
• Severity: 3
• Assignee: WC Triage
• Reporter: Oleg Drokin

Description

__getname used in ll_getname allocated PATH_MAX sized 4k buffer that is overkill.
In fact we only need a single component of the pathname that could not be longer than 255 bytes, so only allocating 256 bytes should be enough.
Additionally need to check for strncpy_from_user negative return values while at that.

Comments

[Joseph Gmitter (Inactive)]

Landed for 2.8.

[Gerrit Updater]

Oleg Drokin ([e-mail]) merged in patch http://review.whamcloud.com/15089/
Subject: LU-6667 llite: improve ll_getname
Project: fs/lustre-release
Branch: master
Current Patch Set:
Commit: 051c25bbcd298b9f8fbbc478d968aeb9963b663f

[Gerrit Updater]

Oleg Drokin ([e-mail]) uploaded a new patch: http://review.whamcloud.com/15089
Subject: LU-6667 llite: improve ll_getname
Project: fs/lustre-release
Branch: master
Current Patch Set: 1
Commit: aecf61fc4c4068636c815a7d50e8b76352a77d08