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-rw-r--r--fs/isofs/rock.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c
index f488bbae541a..bb63254ed848 100644
--- a/fs/isofs/rock.c
+++ b/fs/isofs/rock.c
@@ -30,6 +30,7 @@ struct rock_state {
int cont_size;
int cont_extent;
int cont_offset;
+ int cont_loops;
struct inode *inode;
};
@@ -73,6 +74,9 @@ static void init_rock_state(struct rock_state *rs, struct inode *inode)
rs->inode = inode;
}
+/* Maximum number of Rock Ridge continuation entries */
+#define RR_MAX_CE_ENTRIES 32
+
/*
* Returns 0 if the caller should continue scanning, 1 if the scan must end
* and -ve on error.
@@ -105,6 +109,8 @@ static int rock_continue(struct rock_state *rs)
goto out;
}
ret = -EIO;
+ if (++rs->cont_loops >= RR_MAX_CE_ENTRIES)
+ goto out;
bh = sb_bread(rs->inode->i_sb, rs->cont_extent);
if (bh) {
memcpy(rs->buffer, bh->b_data + rs->cont_offset,