Zebediah Figura : setupapi: Handle an empty string for the source file in SetupQueueCopySection().

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 86724af01241b257a4b4b39682031c9c7a3aaeaa
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=86724af01241b257a4b4b39682031c9c7a3aaeaa

Author: Zebediah Figura <z.figura12 at gmail.com>
Date:   Mon May 13 10:28:51 2019 -0500

setupapi: Handle an empty string for the source file in SetupQueueCopySection().

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=47185
Signed-off-by: Zebediah Figura <z.figura12 at gmail.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/setupapi/queue.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/setupapi/queue.c b/dlls/setupapi/queue.c
index f267380..cacab2d 100644
--- a/dlls/setupapi/queue.c
+++ b/dlls/setupapi/queue.c
@@ -795,6 +795,7 @@ BOOL WINAPI SetupQueueCopySectionW( HSPFILEQ queue, PCWSTR src_root, HINF hinf,
     SP_FILE_COPY_PARAMS_W params;
     INT flags;
     BOOL ret = FALSE;
+    DWORD len;
 
     TRACE("queue %p, src_root %s, hinf %p, hlist %p, section %s, style %#x.\n",
             queue, debugstr_w(src_root), hinf, hlist, debugstr_w(section), style);
@@ -830,7 +831,7 @@ BOOL WINAPI SetupQueueCopySectionW( HSPFILEQ queue, PCWSTR src_root, HINF hinf,
 
         if (!SetupGetStringFieldW( &context, 1, dst_file, ARRAY_SIZE( dst_file ), NULL ))
             goto end;
-        if (!SetupGetStringFieldW( &context, 2, src_file, ARRAY_SIZE( src_file ), NULL ))
+        if (!SetupGetStringFieldW( &context, 2, src_file, ARRAY_SIZE( src_file ), &len ) || len <= sizeof(WCHAR))
             strcpyW( src_file, dst_file );
 
         if (!SetupGetIntField( &context, 4, &flags )) flags = 0;  /* FIXME */