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afs: Fix the afs.cell and afs.volume xattr handlers
authorDavid Howells <dhowells@redhat.com>
Wed, 1 May 2019 12:27:09 +0000 (13:27 +0100)
committerDavid Howells <dhowells@redhat.com>
Tue, 7 May 2019 15:48:44 +0000 (16:48 +0100)
commitc73aa4102f5b9f261a907c3b3df94cd2c478504d
tree52c5ac7f76e40fca82725f7443aea6cf5288c38c
parentc0abbb5791f1984350f1dac72c31c67010010a30
afs: Fix the afs.cell and afs.volume xattr handlers

Fix the ->get handlers for the afs.cell and afs.volume xattrs to pass the
source data size to memcpy() rather than target buffer size.

Overcopying the source data occasionally causes the kernel to oops.

Fixes: d3e3b7eac886 ("afs: Add metadata xattrs")
Signed-off-by: David Howells <dhowells@redhat.com>
fs/afs/xattr.c