Commit 97b07970 authored by Peter Maydell's avatar Peter Maydell Committed by Riku Voipio
Browse files

linux-user: Fix errno for sendrecvmsg with large iovec length 



The sendmsg and recvmsg syscalls use a different errno to indicate
an overlarge iovec length from readv and writev. Handle this
special case in do_sendrcvmsg_locked() to avoid getting the
default errno returned by lock_iovec().

Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Signed-off-by: default avatarRiku Voipio <riku.voipio@linaro.org>
parent dab32b32

linux-user/syscall.c

+9 −0
Original line number Diff line number Diff line
@@ -3485,6 +3485,15 @@ static abi_long do_sendrecvmsg_locked(int fd, struct target_msghdr *msgp, 


    count = tswapal(msgp->msg_iovlen);

    target_vec = tswapal(msgp->msg_iov);



    if (count > IOV_MAX) {

        /* sendrcvmsg returns a different errno for this condition than

         * readv/writev, so we must catch it here before lock_iovec() does.

         */

        ret = -TARGET_EMSGSIZE;

        goto out2;

    }



    vec = lock_iovec(send ? VERIFY_READ : VERIFY_WRITE,

                     target_vec, count, send);

    if (vec == NULL) {