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| author | Adrian Hunter <ext-adrian.hunter@nokia.com> | 2008-09-05 15:17:42 +0200 |
|---|---|---|
| committer | Artem Bityutskiy <Artem.Bityutskiy@nokia.com> | 2008-09-30 10:12:57 +0200 |
| commit | ed382d5898ccfc3d7ba775be2f1596f6a1547935 (patch) | |
| tree | 20738a804f51086e94f6c76c689b929582b7c415 /fs/ubifs | |
| parent | UBIFS: correct key comparison (diff) | |
| download | linux-ed382d5898ccfc3d7ba775be2f1596f6a1547935.tar.xz linux-ed382d5898ccfc3d7ba775be2f1596f6a1547935.zip | |
UBIFS: ensure data read beyond i_size is zeroed out correctly
Signed-off-by: Adrian Hunter <ext-adrian.hunter@nokia.com>
Diffstat (limited to 'fs/ubifs')
| -rw-r--r-- | fs/ubifs/file.c | 10 | ||||
| -rw-r--r-- | fs/ubifs/ubifs-media.h | 1 |
2 files changed, 8 insertions, 3 deletions
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c index cdcfe95cbfb4..2f20a49ba34e 100644 --- a/fs/ubifs/file.c +++ b/fs/ubifs/file.c @@ -147,6 +147,12 @@ static int do_readpage(struct page *page) err = ret; if (err != -ENOENT) break; + } else if (block + 1 == beyond) { + int dlen = le32_to_cpu(dn->size); + int ilen = i_size & (UBIFS_BLOCK_SIZE - 1); + + if (ilen && ilen < dlen) + memset(addr + ilen, 0, dlen - ilen); } } if (++i >= UBIFS_BLOCKS_PER_PAGE) @@ -601,7 +607,7 @@ static int populate_page(struct ubifs_info *c, struct page *page, addr = zaddr = kmap(page); - end_index = (i_size + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + end_index = (i_size - 1) >> PAGE_CACHE_SHIFT; if (!i_size || page->index > end_index) { memset(addr, 0, PAGE_CACHE_SIZE); goto out_hole; @@ -649,7 +655,7 @@ static int populate_page(struct ubifs_info *c, struct page *page, if (end_index == page->index) { int len = i_size & (PAGE_CACHE_SIZE - 1); - if (len < read) + if (len && len < read) memset(zaddr + len, 0, read - len); } diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h index a9ecbd9af20d..0b378042a3a2 100644 --- a/fs/ubifs/ubifs-media.h +++ b/fs/ubifs/ubifs-media.h @@ -75,7 +75,6 @@ */ #define UBIFS_BLOCK_SIZE 4096 #define UBIFS_BLOCK_SHIFT 12 -#define UBIFS_BLOCK_MASK 0x00000FFF /* UBIFS padding byte pattern (must not be first or last byte of node magic) */ #define UBIFS_PADDING_BYTE 0xCE |