Merge branch 'linux-4.6' of git://github.com/skeggsb/linux into drm-fixes

[deliverable/linux.git] / fs / jffs2 / scan.c

diff --git a/fs/jffs2/scan.c b/fs/jffs2/scan.c
index 7654e87b042869ef43aff269a10e88a4088d59c3..9ad5ba4b299be2f41cca834e97480a309c4e7b16 100644 (file)
--- a/fs/jffs2/scan.c
+++ b/fs/jffs2/scan.c
@@ -510,6 +510,10 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
                                sumlen = c->sector_size - je32_to_cpu(sm->offset);
                                sumptr = buf + buf_size - sumlen;
 
+                               /* sm->offset maybe wrong but MAGIC maybe right */
+                               if (sumlen > c->sector_size)
+                                       goto full_scan;
+
                                /* Now, make sure the summary itself is available */
                                if (sumlen > buf_size) {
                                        /* Need to kmalloc for this. */
@@ -544,6 +548,7 @@ static int jffs2_scan_eraseblock (struct jffs2_sb_info *c, struct jffs2_eraseblo
                }
        }
 
+full_scan:
        buf_ofs = jeb->offset;
 
        if (!buf_size) {