This is a note to let you know that I've just added the patch titled
cifs: small underflow in cnvrtDosUnixTm()
to the 3.18-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
cifs-small-underflow-in-cnvrtdosunixtm.patch
and it can be found in the queue-3.18 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Thu Mar 22 15:16:04 CET 2018
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Mon, 1 May 2017 21:43:43 +0300
Subject: cifs: small underflow in cnvrtDosUnixTm()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
[ Upstream commit 564277eceeca01e02b1ef3e141cfb939184601b4 ]
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@xxxxxxxxxx>
Signed-off-by: Steve French <smfrench@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/cifs/netmisc.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -980,10 +980,10 @@ struct timespec cnvrtDosUnixTm(__le16 le
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];
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-3.18/mmc-host-omap_hsmmc-checking-for-null-instead-of-is_err.patch
queue-3.18/hsi-ssi_protocol-double-free-in-ssip_pn_xmit.patch
queue-3.18/cifs-small-underflow-in-cnvrtdosunixtm.patch