diff options
Diffstat (limited to 'fs/libfs.c')
-rw-r--r-- | fs/libfs.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/libfs.c b/fs/libfs.c index 8debe7b33769..62baa0387d6e 100644 --- a/fs/libfs.c +++ b/fs/libfs.c | |||
@@ -925,6 +925,8 @@ EXPORT_SYMBOL(generic_file_fsync); | |||
925 | int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks) | 925 | int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks) |
926 | { | 926 | { |
927 | u64 last_fs_block = num_blocks - 1; | 927 | u64 last_fs_block = num_blocks - 1; |
928 | u64 last_fs_page = | ||
929 | last_fs_block >> (PAGE_CACHE_SHIFT - blocksize_bits); | ||
928 | 930 | ||
929 | if (unlikely(num_blocks == 0)) | 931 | if (unlikely(num_blocks == 0)) |
930 | return 0; | 932 | return 0; |
@@ -932,10 +934,8 @@ int generic_check_addressable(unsigned blocksize_bits, u64 num_blocks) | |||
932 | if ((blocksize_bits < 9) || (blocksize_bits > PAGE_CACHE_SHIFT)) | 934 | if ((blocksize_bits < 9) || (blocksize_bits > PAGE_CACHE_SHIFT)) |
933 | return -EINVAL; | 935 | return -EINVAL; |
934 | 936 | ||
935 | if ((last_fs_block > | 937 | if ((last_fs_block > (sector_t)(~0ULL) >> (blocksize_bits - 9)) || |
936 | (sector_t)(~0ULL) >> (blocksize_bits - 9)) || | 938 | (last_fs_page > (pgoff_t)(~0ULL))) { |
937 | (last_fs_block > | ||
938 | (pgoff_t)(~0ULL) >> (PAGE_CACHE_SHIFT - blocksize_bits))) { | ||
939 | return -EFBIG; | 939 | return -EFBIG; |
940 | } | 940 | } |
941 | return 0; | 941 | return 0; |