1 files changed, 12 insertions, 0 deletions

diff --git a/fs/hfsplus/bitmap.c b/fs/hfsplus/bitmap.c
index d128a25b74d..ea30afc2a03 100644
--- a/fs/hfsplus/bitmap.c
+++ b/fs/hfsplus/bitmap.c
@@ -32,6 +32,10 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *ma
         mutex_lock(&HFSPLUS_SB(sb).alloc_file->i_mutex);
         mapping = HFSPLUS_SB(sb).alloc_file->i_mapping;
         page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS, NULL);
+        if (IS_ERR(page)) {
+                start = size;
+                goto out;
+        }
         pptr = kmap(page);
         curr = pptr + (offset & (PAGE_CACHE_BITS - 1)) / 32;
         i = offset % 32;
@@ -73,6 +77,10 @@ int hfsplus_block_allocate(struct super_block *sb, u32 size, u32 offset, u32 *ma
                         break;
                 page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS,
                                          NULL);
+                if (IS_ERR(page)) {
+                        start = size;
+                        goto out;
+                }
                 curr = pptr = kmap(page);
                 if ((size ^ offset) / PAGE_CACHE_BITS)
                         end = pptr + PAGE_CACHE_BITS / 32;
@@ -120,6 +128,10 @@ found:
                 offset += PAGE_CACHE_BITS;
                 page = read_mapping_page(mapping, offset / PAGE_CACHE_BITS,
                                          NULL);
+                if (IS_ERR(page)) {
+                        start = size;
+                        goto out;
+                }
                 pptr = kmap(page);
                 curr = pptr;
                 end = pptr + PAGE_CACHE_BITS / 32;