[PATCH] Fix potential NULL pointer deref in gen_init_cpio

Fix potential NULL pointer deref in gen_init_cpio.c spotted by coverity
checker.  This fixes coverity bug #86

Without this patch we risk dereferencing a NULL `type' in the
"if ('\n' == *type) {" line.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index 33dbcbf..83acd6c 100644 (file)
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -471,6 +471,7 @@ int main (int argc, char *argv[])
                                "ERROR: incorrect format, could not locate file type line %d: '%s'\n",
                                line_nr, line);
                        ec = -1;
+                       break;
                }
 
                if ('\n' == *type) {
@@ -506,7 +507,8 @@ int main (int argc, char *argv[])
                                line_nr, line);
                }
        }
-       cpio_trailer();
+       if (ec == 0)
+               cpio_trailer();
 
        exit(ec);
 }