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authorPhillip Lougher <phillip@squashfs.org.uk>2013-11-24 01:40:49 +0100
committerPhillip Lougher <phillip@squashfs.org.uk>2013-11-24 02:02:50 +0100
commit6d565409503f4e1f74ac30de14e8c91a2b826cd8 (patch)
tree733a81c4b0b7cdcbdda144a0a4e0909469b75116 /fs
parentSquashfs: Check stream is not NULL in decompressor_multi.c (diff)
downloadlinux-6d565409503f4e1f74ac30de14e8c91a2b826cd8.tar.xz
linux-6d565409503f4e1f74ac30de14e8c91a2b826cd8.zip
Squashfs: fix failure to unlock pages on decompress error
Direct decompression into the page cache. If we fall back to using an intermediate buffer (because we cannot grab all the page cache pages) and we get a decompress fail, we forgot to release the pages. Reported-by: Roman Peniaev <r.peniaev@gmail.com> Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Diffstat (limited to 'fs')
-rw-r--r--fs/squashfs/file_direct.c5
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/squashfs/file_direct.c b/fs/squashfs/file_direct.c
index 2943b2bfae48..62a0de6632e1 100644
--- a/fs/squashfs/file_direct.c
+++ b/fs/squashfs/file_direct.c
@@ -84,6 +84,9 @@ int squashfs_readpage_block(struct page *target_page, u64 block, int bsize)
*/
res = squashfs_read_cache(target_page, block, bsize, pages,
page);
+ if (res < 0)
+ goto mark_errored;
+
goto out;
}
@@ -119,7 +122,7 @@ mark_errored:
* dealt with by the caller
*/
for (i = 0; i < pages; i++) {
- if (page[i] == target_page)
+ if (page[i] == NULL || page[i] == target_page)
continue;
flush_dcache_page(page[i]);
SetPageError(page[i]);