FS-Cache: Add missing initialization of ret in cachefiles_write_page()

commit cf89752645e47d86ba8a4157f4b121fcb33434c5 upstream.

fs/cachefiles/rdwr.c: In function ‘cachefiles_write_page’:
fs/cachefiles/rdwr.c:882: warning: ‘ret’ may be used uninitialized in
this function

If the jump to label "error" is taken, "ret" will indeed be
uninitialized, and random stack data may be printed by the debug code.

Fixes: 102f4d900c9c8f5e ("FS-Cache: Handle a write to the page immediately beyond the EOF marker")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 88483abe08d3fb0276ca1bcdbbb2d4a4e12c0985..d2582ebce887062f8db42b9f504bceb07d68f914 100644 (file)
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -892,7 +892,7 @@ int cachefiles_write_page(struct fscache_storage *op, struct page *page)
        loff_t pos, eof;
        size_t len;
        void *data;
-       int ret;
+       int ret = -ENOBUFS;
 
        ASSERT(op != NULL);
        ASSERT(page != NULL);