The branch stable/13 has been updated by kib:
URL:
https://cgit.FreeBSD.org/src/commit/?id=2df5e7711bee3c35209d576aa57ef09a7a839d79
commit 2df5e7711bee3c35209d576aa57ef09a7a839d79
Author: Konstantin Belousov <k...@freebsd.org>
AuthorDate: 2021-04-13 19:12:19 +0000
Commit: Konstantin Belousov <k...@freebsd.org>
CommitDate: 2021-04-23 11:14:09 +0000
sbuf_uionew(): sbuf_new() takes int as length
(cherry picked from commit 116f26f947b8bbf868dcd85d79226406029a45ee)
---
sys/kern/subr_sbuf.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/sys/kern/subr_sbuf.c b/sys/kern/subr_sbuf.c
index cdeaf690208f..b7f135e81206 100644
--- a/sys/kern/subr_sbuf.c
+++ b/sys/kern/subr_sbuf.c
@@ -266,6 +266,10 @@ sbuf_uionew(struct sbuf *s, struct uio *uio, int *error)
KASSERT(error != NULL,
("%s called with NULL error pointer", __func__));
+ if (uio->uio_resid >= INT_MAX || uio->uio_resid < SBUF_MINSIZE - 1) {
+ *error = EINVAL;
+ return (NULL);
+ }
s = sbuf_new(s, NULL, uio->uio_resid + 1, 0);
if (s == NULL) {
*error = ENOMEM;
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