From: Alex Suykov <alex.suy...@gmail.com>
When passing ancillary data through a unix socket, handle
credentials properly instead of doing a simple copy and
issuing a warning.
Signed-off-by: Alex Suykov <alex.suy...@gmail.com>
Signed-off-by: Riku Voipio <riku.voi...@linaro.org>
---
linux-user/syscall.c | 18 ++++++++++++++----
1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 683f8cc..d4398b9 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1214,16 +1214,26 @@ static inline abi_long target_to_host_cmsg(struct
msghdr *msgh,
cmsg->cmsg_type = tswap32(target_cmsg->cmsg_type);
cmsg->cmsg_len = CMSG_LEN(len);
- if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
- gemu_log("Unsupported ancillary data: %d/%d\n", cmsg->cmsg_level,
cmsg->cmsg_type);
- memcpy(data, target_data, len);
- } else {
+ if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) {
int *fd = (int *)data;
int *target_fd = (int *)target_data;
int i, numfds = len / sizeof(int);
for (i = 0; i < numfds; i++)
fd[i] = tswap32(target_fd[i]);
+ } else if (cmsg->cmsg_level == SOL_SOCKET
+ && cmsg->cmsg_type == SCM_CREDENTIALS) {
+ struct ucred *cred = (struct ucred *)data;
+ struct target_ucred *target_cred =
+ (struct target_ucred *)target_data;
+
+ __put_user(target_cred->pid, &cred->pid);
+ __put_user(target_cred->uid, &cred->uid);
+ __put_user(target_cred->gid, &cred->gid);
+ } else {
+ gemu_log("Unsupported ancillary data: %d/%d\n",
+ cmsg->cmsg_level, cmsg->cmsg_type);
+ memcpy(data, target_data, len);
}
cmsg = CMSG_NXTHDR(msgh, cmsg);
--
2.1.4
