svn commit: r311286 - head/sys/kern
Konstantin Belousov
kib at FreeBSD.org
Wed Jan 4 16:09:47 UTC 2017
Author: kib
Date: Wed Jan 4 16:09:45 2017
New Revision: 311286
URL: https://svnweb.freebsd.org/changeset/base/311286
Log:
The callers of kern_getfsstat(UIO_SYSSPACE) expect that *buf always
returns memory which must be freed, regardless of the error. Assign
NULL to *buf in case we are not going to allocate any memory due to
invalid mode.
Reported and tested by: pho
Reviewed by: jhb
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks (together with r310638)
Differential revision: https://reviews.freebsd.org/D9042
Modified:
head/sys/kern/vfs_syscalls.c
Modified: head/sys/kern/vfs_syscalls.c
==============================================================================
--- head/sys/kern/vfs_syscalls.c Wed Jan 4 16:09:08 2017 (r311285)
+++ head/sys/kern/vfs_syscalls.c Wed Jan 4 16:09:45 2017 (r311286)
@@ -429,6 +429,8 @@ kern_getfsstat(struct thread *td, struct
case MNT_NOWAIT:
break;
default:
+ if (bufseg == UIO_SYSSPACE)
+ *buf = NULL;
return (EINVAL);
}
restart:
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