[LU-1518] Missing/bad operations in mdd_{obf,dot_lustre}_obj_op causing LBUGs

• Type: Bug
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.3.0, Lustre 2.4.0, Lustre 2.1.4
• Affects Version/s: Lustre 2.3.0, Lustre 2.1.2, Lustre 2.1.3
• Labels: fid
• Severity: 3
• Assignee: Niu Yawei (Inactive)
• Reporter: John Hammond

Description

An unprivileged user can cause an MDS LBUG by issuing "chmod +x /mnt/lustre/.lustre/fid". Similarly root can cause an LBUG by issuing

{get,set}

facl calls against this directory. Privileged users cannot changes the attributes of /mnt/lustre/.lustre.

Issue Links

• is related to: LU-1777 open-by-fid: deadlock in lock_rename()
• is related to: LU-2780 Use real inode for .lustre/fid
• is related to: LU-1549 open-unlinked files are accessible through the PENDING directory
• is related to: LU-1550 open-by-fid getdents may return inconsistend data
• is related to: LU-1553 inaccessible files in .lustre
• is related to: LU-1552 opening lost+found: triggers (mdt_open.c:784:mdt_finish_open()) ASSERTION( ma->ma_valid & MA_INODE ) failed:
• is related to: LU-1532 only allow FID_SEQ_NORMAL from clients
• is related to: LU-1531 Accessing .lustre/fid/[0x1:0x0:0x0] triggers LBUG in osd_compat_objid_lookup()