[JFFS2] Handle dirents on the flash with embedded zero bytes in names.

In three places: summary scan, normal scan, REF_PRISTINE GC.

Just truncate at the NUL, since that was the correct thing to do in the
only case where this (inexplicable) breakage has been seen.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

1 files changed, 6 insertions, 1 deletions

diff --git a/fs/jffs2/gc.c b/fs/jffs2/gc.c
index 95be264fe9b6..f25e485ed879 100644
--- a/fs/jffs2/gc.c
+++ b/fs/jffs2/gc.c
@@ -608,10 +608,15 @@ static int jffs2_garbage_collect_pristine(struct jffs2_sb_info *c,
                         goto bail;
                 }
 
+                if (strnlen(node->d.name, node->d.nsize) != node->d.nsize) {
+                        printk(KERN_WARNING "Name in dirent node at 0x%08x contains zeroes\n", ref_offset(raw));
+                        goto bail;
+                }
+
                 if (node->d.nsize) {
                         crc = crc32(0, node->d.name, node->d.nsize);
                         if (je32_to_cpu(node->d.name_crc) != crc) {
-                                printk(KERN_WARNING "Name CRC failed on REF_PRISTINE dirent ode at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
+                                printk(KERN_WARNING "Name CRC failed on REF_PRISTINE dirent node at 0x%08x: Read 0x%08x, calculated 0x%08x\n",
                                        ref_offset(raw), je32_to_cpu(node->d.name_crc), crc);
                                 goto bail;
                         }