zhou1615

In set_override(), the return value of set_allow_opts() is not considered. Fix this by adding an error check about set_allow_opts().

dav_fs_dir_file_name() will not set *fname_p to NULL on failure, and all callers of dav_fs_dir_file_name() does not check the return value of dav_fs_dir_file_name(), which could lead to an undefined behavior against...

In ap_expr_parse(), ap_expr_yylex_init() will return 1 on failure, and ctx.scanner will remain NULL. However the return value of ap_expr_yylex_init() is not checked, and there is a dereference of ctx.scanner in...

ap_runtime_dir_relative() will return NULL on failure. However cgid_init() does not check the return value of ap_runtime_dir_relative() and use it directly. Fix this bug by adding a NULL check.

The function apreq_param_make() will return NULL on failure. However NULL check are forgetten before derenference, which could lead to NULL pointer dereference. Adding NULL check to all use of apreq_param_make().

apreq_cookie_make() will return NULL on failure. However serveral uses of it does not check the return value of apreq_cookie_make(), which could lead to NULL pointer dereference.