The branch main has been updated by dchagin:
URL:
https://cgit.FreeBSD.org/src/commit/?id=d6ccce0aa267db8ee57736e944520e2967896340
commit d6ccce0aa267db8ee57736e944520e2967896340
Author: Dmitry Chagin <dcha...@freebsd.org>
AuthorDate: 2022-03-31 18:21:41 +0000
Commit: Dmitry Chagin <dcha...@freebsd.org>
CommitDate: 2022-03-31 18:21:41 +0000
linux(4): readlink should fail if bufzis <= 0.
MFC after: 2 weeks
---
sys/compat/linux/linux_file.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/sys/compat/linux/linux_file.c b/sys/compat/linux/linux_file.c
index 6a1402c09456..8926e760fc39 100644
--- a/sys/compat/linux/linux_file.c
+++ b/sys/compat/linux/linux_file.c
@@ -1042,6 +1042,9 @@ linux_readlink(struct thread *td, struct
linux_readlink_args *args)
char *name;
int error;
+ if (args->count <= 0)
+ return (EINVAL);
+
if (!LUSECONVPATH(td)) {
return (kern_readlinkat(td, AT_FDCWD, args->name, UIO_USERSPACE,
args->buf, UIO_USERSPACE, args->count));
@@ -1060,6 +1063,9 @@ linux_readlinkat(struct thread *td, struct
linux_readlinkat_args *args)
char *name;
int error, dfd;
+ if (args->bufsiz <= 0)
+ return (EINVAL);
+
dfd = (args->dfd == LINUX_AT_FDCWD) ? AT_FDCWD : args->dfd;
if (!LUSECONVPATH(td)) {
return (kern_readlinkat(td, dfd, args->path, UIO_USERSPACE,
