diff options
Diffstat (limited to 'sys/fs/msdosfs/msdosfs_conv.c')
| -rw-r--r-- | sys/fs/msdosfs/msdosfs_conv.c | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/sys/fs/msdosfs/msdosfs_conv.c b/sys/fs/msdosfs/msdosfs_conv.c index 32138c5..7b3591e 100644 --- a/sys/fs/msdosfs/msdosfs_conv.c +++ b/sys/fs/msdosfs/msdosfs_conv.c @@ -780,7 +780,14 @@ winChkName(un, unlen, wep, chksum, u2w_loaded, u2w, ul_loaded, ul) */ i = ((wep->weCnt&WIN_CNT) - 1) * WIN_CHARS; un += i; - if ((unlen -= i) <= 0) + unlen -= i; + + /* + * unlen being zero must not be treated as length missmatch. It is + * possible if the entry is WIN_LAST and contains nothing but the + * terminating 0. + */ + if (unlen < 0) return -1; if ((wep->weCnt&WIN_LAST) && unlen > WIN_CHARS) return -1; |
