From: Kit Westneat <kwestneat@xxxxxxx>
e2image manually opens a new IO channel, and then sets the file system
to use this new IO channel via ext2fs_rewrite+to_io(). We need to
make sure the IO channel is set to the file system's block size to
avoid some nasty buffer overruns.
[ Modified by tytso to use io_channel_set_blksize() ]
Signed-off-by: Kit Westneat <kwestneat@xxxxxxx>
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Reviewed-by: Andreas Dilger <andreas.dilger@xxxxxxxxx>
---
lib/ext2fs/openfs.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/lib/ext2fs/openfs.c b/lib/ext2fs/openfs.c
index 9fe1645..c38b586 100644
--- a/lib/ext2fs/openfs.c
+++ b/lib/ext2fs/openfs.c
@@ -451,8 +451,13 @@ errcode_t ext2fs_set_data_io(ext2_filsys fs, io_channel new_io)
errcode_t ext2fs_rewrite_to_io(ext2_filsys fs, io_channel new_io)
{
+ errcode_t err;
+
if ((fs->flags & EXT2_FLAG_IMAGE_FILE) == 0)
return EXT2_ET_NOT_IMAGE_FILE;
+ err = io_channel_set_blksize(new_io, fs->blocksize);
+ if (err)
+ return err;
fs->io = fs->image_io = new_io;
fs->flags |= EXT2_FLAG_DIRTY | EXT2_FLAG_RW |
EXT2_FLAG_BB_DIRTY | EXT2_FLAG_IB_DIRTY;
--
1.8.5.rc3.362.gdf10213
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