BackPup/Linux
1
0 Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-10-07 05:31:08 -04:00
Code Issues Packages Projects Releases Wiki Activity

netrom: fix api breakage in nr_setsockopt()

Browse Source 
This needs to copy an unsigned int from user space instead of a long to
avoid breaking user space with an API change.

I have updated all the integer overflow checks from ULONG to UINT as
well.  This is a slight API change but I do not expect it to affect
anything in real life.

Fixes: 3087a6f36e ("netrom: fix copying in user data in nr_setsockopt")
Signed-off-by: Dan Carpenter <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Dan Carpenter authored and David S. Miller committed 2022-01-07 14:11:05 +00:00
1 parent 9371937092
commit dc35616e6c
1 file changed
+6 -6
Download Patch File Download Diff File Expand all files Collapse all files
net/netrom/af_netrom.c
+6 -6
View File
@@ -298,7 +298,7 @@ static int nr_setsockopt(struct socket *sock, int level, int optname,
{
struct sock *sk = sock->sk;
struct nr_sock *nr = nr_sk(sk);
unsigned long opt;
unsigned int opt;
if (level != SOL_NETROM)
return -ENOPROTOOPT;
@@ -306,18 +306,18 @@ static int nr_setsockopt(struct socket *sock, int level, int optname,
if (optlen < sizeof(unsigned int))
return -EINVAL;
if (copy_from_sockptr(&opt, optval, sizeof(unsigned long)))
if (copy_from_sockptr(&opt, optval, sizeof(opt)))
return -EFAULT;
switch (optname) {
case NETROM_T1:
if (opt < 1 || opt > ULONG_MAX / HZ)
if (opt < 1 || opt > UINT_MAX / HZ)
return -EINVAL;
nr->t1 = opt * HZ;
return 0;
case NETROM_T2:
if (opt < 1 || opt > ULONG_MAX / HZ)
if (opt < 1 || opt > UINT_MAX / HZ)
return -EINVAL;
nr->t2 = opt * HZ;
return 0;
@@ -329,13 +329,13 @@ static int nr_setsockopt(struct socket *sock, int level, int optname,
return 0;
case NETROM_T4:
if (opt < 1 || opt > ULONG_MAX / HZ)
if (opt < 1 || opt > UINT_MAX / HZ)
return -EINVAL;
nr->t4 = opt * HZ;
return 0;
case NETROM_IDLE:
if (opt > ULONG_MAX / (60 * HZ))
if (opt > UINT_MAX / (60 * HZ))
return -EINVAL;
nr->idle = opt * 60 * HZ;
return 0;