D61461.1794667295.diff
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	diff --git a/sys/kern/vfs_extattr.c b/sys/kern/vfs_extattr.c
	--- a/sys/kern/vfs_extattr.c
	+++ b/sys/kern/vfs_extattr.c
	@@ -737,7 +737,7 @@
	sizep = NULL;
	cnt = 0;
	if (auiop != NULL) {
	- if (auiop->uio_resid > IOSIZE_MAX)
	+ if (auiop->uio_resid < 0 \|\| auiop->uio_resid > IOSIZE_MAX)
	return (EINVAL);
	cnt = auiop->uio_resid;
	} else
	@@ -787,6 +787,9 @@
	struct uio auio, *auiop;
	struct iovec aiov;

	+ if (nbytes > IOSIZE_MAX)
	+ return (EINVAL);
	+
	if (data != NULL) {
	aiov.iov_base = data;
	aiov.iov_len = nbytes;
	@@ -870,6 +873,9 @@
	struct uio auio, *auiop;
	struct iovec aiov;

	+ if (nbytes > IOSIZE_MAX)
	+ return (EINVAL);
	+
	if (data != NULL) {
	aiov.iov_base = data;
	aiov.iov_len = nbytes;