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authorDavid Howells <dhowells@redhat.com>2019-05-01 14:27:09 +0200
committerDavid Howells <dhowells@redhat.com>2019-05-07 17:48:44 +0200
commitc73aa4102f5b9f261a907c3b3df94cd2c478504d (patch)
tree52c5ac7f76e40fca82725f7443aea6cf5288c38c /fs/afs
parentafs: Calculate i_blocks based on file size (diff)
downloadlinux-c73aa4102f5b9f261a907c3b3df94cd2c478504d.tar.xz
linux-c73aa4102f5b9f261a907c3b3df94cd2c478504d.zip
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>
Diffstat (limited to 'fs/afs')
-rw-r--r--fs/afs/xattr.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index a2cdf25573e2..4ea7e53752dc 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -50,7 +50,7 @@ static int afs_xattr_get_cell(const struct xattr_handler *handler,
return namelen;
if (namelen > size)
return -ERANGE;
- memcpy(buffer, cell->name, size);
+ memcpy(buffer, cell->name, namelen);
return namelen;
}
@@ -104,7 +104,7 @@ static int afs_xattr_get_volume(const struct xattr_handler *handler,
return namelen;
if (namelen > size)
return -ERANGE;
- memcpy(buffer, volname, size);
+ memcpy(buffer, volname, namelen);
return namelen;
}