Add missing NULL in zpl_xattr_handlers

The xattr_resolve_name() helper function expects the registered
list of xattr handlers to be NULL terminated.  This NULL was
accidentally missing which could result in a NULL dereference.

Interestingly this issue only manifested itself on certain 32-bit
systems.  Presumably on 64-bit kernels we just always happen to
get lucky and the memory following the structure is zeroed.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Issue #594

diff --git a/module/zfs/zpl_xattr.c b/module/zfs/zpl_xattr.c
index dbe61df..c03764f 100644 (file)
--- a/module/zfs/zpl_xattr.c
+++ b/module/zfs/zpl_xattr.c
@@ -674,4 +674,5 @@ xattr_handler_t *zpl_xattr_handlers[] = {
        &zpl_xattr_acl_access_handler,
        &zpl_xattr_acl_default_handler,
 #endif /* HAVE_POSIX_ACLS */
+       NULL
 };