diff options
| -rw-r--r-- | fs/isofs/rock.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/fs/isofs/rock.c b/fs/isofs/rock.c index 977dd7009c0..9a81830abff 100644 --- a/fs/isofs/rock.c +++ b/fs/isofs/rock.c @@ -81,9 +81,22 @@ static void init_rock_state(struct rock_state *rs, struct inode *inode) static int rock_continue(struct rock_state *rs) { int ret = 1; + int blocksize = 1 << rs->inode->i_blkbits; + const int min_de_size = offsetof(struct rock_ridge, u); kfree(rs->buffer); rs->buffer = NULL; + + if ((unsigned)rs->cont_offset > blocksize - min_de_size || + (unsigned)rs->cont_size > blocksize || + (unsigned)(rs->cont_offset + rs->cont_size) > blocksize) { + printk(KERN_NOTICE "rock: corrupted directory entry. " + "extent=%d, offset=%d, size=%d\n", + rs->cont_extent, rs->cont_offset, rs->cont_size); + ret = -EIO; + goto out; + } + if (rs->cont_extent) { struct buffer_head *bh; |