This is a note to let you know that I've just added the patch titled
net/x25: fix incorrect parameter validation in the x25_getsockopt() function
to the 6.6-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:
net-x25-fix-incorrect-parameter-validation-in-the-x2.patch
and it can be found in the queue-6.6 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 6749199bf7733e3519a321c08071da9ba617f633
Author: Gavrilov Ilia <Ilia.Gavrilov@xxxxxxxxxxx>
Date: Thu Mar 7 14:23:50 2024 +0000
net/x25: fix incorrect parameter validation in the x25_getsockopt() function
[ Upstream commit d6eb8de2015f0c24822e47356f839167ebde2945 ]
The 'len' variable can't be negative when assigned the result of
'min_t' because all 'min_t' parameters are cast to unsigned int,
and then the minimum one is chosen.
To fix the logic, check 'len' as read from 'optlen',
where the types of relevant variables are (signed) int.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@xxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index 0fb5143bec7ac..f15a4493eb0bf 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -460,12 +460,12 @@ static int x25_getsockopt(struct socket *sock, int level, int optname,
if (get_user(len, optlen))
goto out;
- len = min_t(unsigned int, len, sizeof(int));
-
rc = -EINVAL;
if (len < 0)
goto out;
+ len = min_t(unsigned int, len, sizeof(int));
+
rc = -EFAULT;
if (put_user(len, optlen))
goto out;
