svn commit: r365254 - in releng: 11.3/sys/kern 11.4/sys/kern

[Gordon Tetlow]

Author: gordon
Date: Wed Sep  2 16:22:14 2020
New Revision: 365254
URL: https://svnweb.freebsd.org/changeset/base/365254

Log:
  Fix getfsstat compatibility system call panic.
  
  Approved by:	so
  Security:	FreeBSD-EN-20:18.getfsstat

Modified:
  releng/11.3/sys/kern/vfs_syscalls.c
  releng/11.4/sys/kern/vfs_syscalls.c

Modified: releng/11.3/sys/kern/vfs_syscalls.c
==============================================================================
--- releng/11.3/sys/kern/vfs_syscalls.c	Wed Sep  2 16:21:27 2020	(r365253)
+++ releng/11.3/sys/kern/vfs_syscalls.c	Wed Sep  2 16:22:14 2020	(r365254)
@@ -409,6 +409,8 @@ kern_getfsstat(struct thread *td, struct statfs **buf,
 	case MNT_NOWAIT:
 		break;
 	default:
+		if (bufseg == UIO_SYSSPACE)
+			*buf = NULL;
 		return (EINVAL);
 	}
 restart:

Modified: releng/11.4/sys/kern/vfs_syscalls.c
==============================================================================
--- releng/11.4/sys/kern/vfs_syscalls.c	Wed Sep  2 16:21:27 2020	(r365253)
+++ releng/11.4/sys/kern/vfs_syscalls.c	Wed Sep  2 16:22:14 2020	(r365254)
@@ -409,6 +409,8 @@ kern_getfsstat(struct thread *td, struct statfs **buf,
 	case MNT_NOWAIT:
 		break;
 	default:
+		if (bufseg == UIO_SYSSPACE)
+			*buf = NULL;
 		return (EINVAL);
 	}
 restart: