When we're iterating a directory, the loop control code reads the
length of the next directory record, failing to account for the fact
that there must be at least 8 bytes (the minimum size of a directory
entry) left in the buffer to read the next directory record. Fix the
loop conditional so that we don't read off the end of the buffer.
Signed-off-by: Darrick J. Wong <darrick.wong@xxxxxxxxxx>
Reported-by: Sami Liedes <sami.liedes@xxxxxx>
---
lib/ext2fs/dir_iterate.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/lib/ext2fs/dir_iterate.c b/lib/ext2fs/dir_iterate.c
index 67152cc..9063c17 100644
--- a/lib/ext2fs/dir_iterate.c
+++ b/lib/ext2fs/dir_iterate.c
@@ -222,7 +222,7 @@ int ext2fs_process_dir_block(ext2_filsys fs,
EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))
csum_size = sizeof(struct ext2_dir_entry_tail);
- while (offset < buflen) {
+ while (offset < buflen - 8) {
dirent = (struct ext2_dir_entry *) (ctx->buf + offset);
if (ext2fs_get_rec_len(fs, dirent, &rec_len))
return BLOCK_ABORT;
--
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