diff mbox series

[net] netrom: fix api breakage in nr_setsockopt()

Message ID 20220107071209.GA22086@kili (mailing list archive)
State Accepted
Commit dc35616e6c2907b0c0c391a205802d8880f7fd85
Delegated to: Netdev Maintainers
Headers show
Series [net] netrom: fix api breakage in nr_setsockopt() | expand

Checks

Context Check Description
netdev/tree_selection success Clearly marked for net
netdev/fixes_present success Fixes tag present in non-next series
netdev/subject_prefix success Link
netdev/cover_letter success Single patches do not need cover letters
netdev/patch_count success Link
netdev/header_inline success No static functions without inline keyword in header files
netdev/build_32bit success Errors and warnings before: 0 this patch: 0
netdev/cc_maintainers success CCed 5 of 5 maintainers
netdev/build_clang success Errors and warnings before: 0 this patch: 0
netdev/module_param success Was 0 now: 0
netdev/verify_signedoff success Signed-off-by tag matches author and committer
netdev/verify_fixes success Fixes tag looks correct
netdev/build_allmodconfig_warn success Errors and warnings before: 0 this patch: 0
netdev/checkpatch success total: 0 errors, 0 warnings, 0 checks, 44 lines checked
netdev/kdoc success Errors and warnings before: 0 this patch: 0
netdev/source_inline success Was 0 now: 0

Commit Message

Dan Carpenter Jan. 7, 2022, 7:12 a.m. UTC 
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: 3087a6f36ee0 ("netrom: fix copying in user data in nr_setsockopt")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
---
 net/netrom/af_netrom.c | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

Comments

patchwork-bot+netdevbpf@kernel.org Jan. 7, 2022, 2:20 p.m. UTC | #1 
Hello:

This patch was applied to netdev/net.git (master)
by David S. Miller <davem@davemloft.net>:

On Fri, 7 Jan 2022 10:12:10 +0300 you wrote:
> 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.
> 
> [...]

Here is the summary with links:
  - [net] netrom: fix api breakage in nr_setsockopt()
    https://git.kernel.org/netdev/net/c/dc35616e6c29

You are awesome, thank you!
diff mbox series

Patch

diff --git a/net/netrom/af_netrom.c b/net/netrom/af_netrom.c
index f1ba7dd3d253..fa9dc2ba3941 100644
--- a/net/netrom/af_netrom.c
+++ b/net/netrom/af_netrom.c
@@ -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;