[LU-4075] osd_xattr_get()) ASSERTION( buf->lb_len == sizeof(dt_obj_version_t) ) failed:

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Affects Version/s: Lustre 2.5.0
• Labels: osd
• Severity: 3
• Assignee: John Hammond
• Reporter: John Hammond

Description

This is a minor issue since it requires root to exploit.

# echo 0 | tee /proc/fs/lustre/llite/*/xattr_cache
0
# getfattr -n trusted.version /mnt/lustre

Message from syslogd@t at Oct  7 09:28:05 ...
 kernel:LustreError: 10513:0:(osd_handler.c:2741:osd_xattr_get()) ASSERTION( buf->lb_len == sizeof(dt_obj_version_t) ) failed:

Message from syslogd@t at Oct  7 09:28:05 ...
 kernel:LustreError: 10513:0:(osd_handler.c:2741:osd_xattr_get()) LBUG

The special case for XATTR_NAME_VERSION should provide the usual "if buf is NULL then return size..." behavior.