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| author |   Dan Carpenter <dan.carpenter@oracle.com> | 2017-05-01 21:43:43 +0300 |
|---|---|---|
| committer |   Steve French <smfrench@gmail.com> | 2017-05-02 14:57:34 -0500 |
| commit | 564277eceeca01e02b1ef3e141cfb939184601b4 (patch) | |
| tree | 57e17aa79a915acfe21d8e428c9be0c28df84c9e /fs/cifs | |
| parent | Merge branch 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs (diff) | |
| download | wireguard-linux-564277eceeca01e02b1ef3e141cfb939184601b4.tar.xz wireguard-linux-564277eceeca01e02b1ef3e141cfb939184601b4.zip | |
cifs: small underflow in cnvrtDosUnixTm()
January is month 1. There is no zero-th month. If someone passes a
zero month then it means we read from one space before the start of the
total_days_of_prev_months[] array.
We may as well also be strict about days as well.
Fixes: 1bd5bbcb6531 ("[CIFS] Legacy time handling for Win9x and OS/2 part 1")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs')
| -rw-r--r-- | fs/cifs/netmisc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c index abae6dd2c6b9..cc88f4f0325e 100644 --- a/fs/cifs/netmisc.c +++ b/fs/cifs/netmisc.c @@ -980,10 +980,10 @@ struct timespec cnvrtDosUnixTm(__le16 le_date, __le16 le_time, int offset) cifs_dbg(VFS, "illegal hours %d\n", st->Hours); days = sd->Day; month = sd->Month; - if ((days > 31) || (month > 12)) { + if (days < 1 || days > 31 || month < 1 || month > 12) { cifs_dbg(VFS, "illegal date, month %d day: %d\n", month, days); - if (month > 12) - month = 12; + days = clamp(days, 1, 31); + month = clamp(month, 1, 12); } month -= 1; days += total_days_of_prev_months[month]; |