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Reject an iovcnt argument of 0 to readv(), writev(), preadv() and pwritev() 

as invalid.  This has been stated by the respective manual pages at least
since Net/2, and is the behaviour specified by XSH5.
This commit is contained in:
kleink 1998-07-31 15:38:58 +00:00
parent 22554e01a9
commit 17de9df6c1
1 changed files with 9 additions and 5 deletions
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14
sys/kern/sys_generic.c
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@ -1,4 +1,4 @@
/* $NetBSD: sys_generic.c,v 1.40 1998/07/28 17:58:29 thorpej Exp $ */
/* $NetBSD: sys_generic.c,v 1.41 1998/07/31 15:38:58 kleink Exp $ */
/*
* Copyright (c) 1982, 1986, 1989, 1993
@ -205,10 +205,12 @@ dofilereadv(p, fd, fp, iovp, iovcnt, offset, flags, retval)
return (EINVAL);
MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
needfree = iov;
} else {
} else if ((u_int)iovcnt > 0) {
iov = aiov;
needfree = NULL;
}
} else
return (EINVAL);
auio.uio_iov = iov;
auio.uio_iovcnt = iovcnt;
auio.uio_rw = UIO_READ;
@ -404,10 +406,12 @@ dofilewritev(p, fd, fp, iovp, iovcnt, offset, flags, retval)
return (EINVAL);
MALLOC(iov, struct iovec *, iovlen, M_IOV, M_WAITOK);
needfree = iov;
} else {
} else if ((u_int)iovcnt > 0) {
iov = aiov;
needfree = NULL;
}
} else
return (EINVAL);
auio.uio_iov = iov;
auio.uio_iovcnt = iovcnt;
auio.uio_rw = UIO_WRITE;