summaryrefslogtreecommitdiffstats
path: root/net/socket.c
diff options
context:
space:
mode:
authorJens Axboe <axboe@kernel.dk>2022-07-25 02:41:03 +0200
committerJens Axboe <axboe@kernel.dk>2022-07-25 02:41:03 +0200
commit4effe18fc0da27ae5d51a702841e87fa13b8a32d (patch)
tree468f353a3713c93b27e7b2c262efd747e66ff199 /net/socket.c
parentMerge branch 'io_uring-zerocopy-send' of git://git.kernel.org/pub/scm/linux/k... (diff)
parentio_uring: ensure REQ_F_ISREG is set async offload (diff)
downloadlinux-4effe18fc0da27ae5d51a702841e87fa13b8a32d.tar.xz
linux-4effe18fc0da27ae5d51a702841e87fa13b8a32d.zip
Merge branch 'for-5.20/io_uring' into for-5.20/io_uring-zerocopy-send
* for-5.20/io_uring: (716 commits) io_uring: ensure REQ_F_ISREG is set async offload net: fix compat pointer in get_compat_msghdr() io_uring: Don't require reinitable percpu_ref io_uring: fix types in io_recvmsg_multishot_overflow io_uring: Use atomic_long_try_cmpxchg in __io_account_mem io_uring: support multishot in recvmsg net: copy from user before calling __get_compat_msghdr net: copy from user before calling __copy_msghdr io_uring: support 0 length iov in buffer select in compat io_uring: fix multishot ending when not polled io_uring: add netmsg cache io_uring: impose max limit on apoll cache io_uring: add abstraction around apoll cache io_uring: move apoll cache to poll.c io_uring: consolidate hash_locked io-wq handling io_uring: clear REQ_F_HASH_LOCKED on hash removal io_uring: don't race double poll setting REQ_F_ASYNC_DATA io_uring: don't miss setting REQ_F_DOUBLE_POLL io_uring: disable multishot recvmsg io_uring: only trace one of complete or overflow ... Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c37
1 files changed, 16 insertions, 21 deletions
diff --git a/net/socket.c b/net/socket.c
index 82af3882b876..ec9ef13a702e 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -2359,25 +2359,20 @@ struct used_address {
unsigned int name_len;
};
-int __copy_msghdr_from_user(struct msghdr *kmsg,
- struct user_msghdr __user *umsg,
- struct sockaddr __user **save_addr,
- struct iovec __user **uiov, size_t *nsegs)
+int __copy_msghdr(struct msghdr *kmsg,
+ struct user_msghdr *msg,
+ struct sockaddr __user **save_addr)
{
- struct user_msghdr msg;
ssize_t err;
- if (copy_from_user(&msg, umsg, sizeof(*umsg)))
- return -EFAULT;
-
kmsg->msg_control_is_user = true;
kmsg->msg_get_inq = 0;
- kmsg->msg_control_user = msg.msg_control;
- kmsg->msg_controllen = msg.msg_controllen;
- kmsg->msg_flags = msg.msg_flags;
+ kmsg->msg_control_user = msg->msg_control;
+ kmsg->msg_controllen = msg->msg_controllen;
+ kmsg->msg_flags = msg->msg_flags;
- kmsg->msg_namelen = msg.msg_namelen;
- if (!msg.msg_name)
+ kmsg->msg_namelen = msg->msg_namelen;
+ if (!msg->msg_name)
kmsg->msg_namelen = 0;
if (kmsg->msg_namelen < 0)
@@ -2387,11 +2382,11 @@ int __copy_msghdr_from_user(struct msghdr *kmsg,
kmsg->msg_namelen = sizeof(struct sockaddr_storage);
if (save_addr)
- *save_addr = msg.msg_name;
+ *save_addr = msg->msg_name;
- if (msg.msg_name && kmsg->msg_namelen) {
+ if (msg->msg_name && kmsg->msg_namelen) {
if (!save_addr) {
- err = move_addr_to_kernel(msg.msg_name,
+ err = move_addr_to_kernel(msg->msg_name,
kmsg->msg_namelen,
kmsg->msg_name);
if (err < 0)
@@ -2402,13 +2397,11 @@ int __copy_msghdr_from_user(struct msghdr *kmsg,
kmsg->msg_namelen = 0;
}
- if (msg.msg_iovlen > UIO_MAXIOV)
+ if (msg->msg_iovlen > UIO_MAXIOV)
return -EMSGSIZE;
kmsg->msg_iocb = NULL;
kmsg->msg_ubuf = NULL;
- *uiov = msg.msg_iov;
- *nsegs = msg.msg_iovlen;
return 0;
}
@@ -2420,8 +2413,10 @@ static int copy_msghdr_from_user(struct msghdr *kmsg,
struct user_msghdr msg;
ssize_t err;
- err = __copy_msghdr_from_user(kmsg, umsg, save_addr, &msg.msg_iov,
- &msg.msg_iovlen);
+ if (copy_from_user(&msg, umsg, sizeof(*umsg)))
+ return -EFAULT;
+
+ err = __copy_msghdr(kmsg, &msg, save_addr);
if (err)
return err;