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null pointer bug (from ralph)
[unix-history]
/
usr
/
src
/
sys
/
kern
/
vfs_vnops.c
diff --git
a/usr/src/sys/kern/vfs_vnops.c
b/usr/src/sys/kern/vfs_vnops.c
index
51d3994
..
280aaa6
100644
(file)
--- a/
usr/src/sys/kern/vfs_vnops.c
+++ b/
usr/src/sys/kern/vfs_vnops.c
@@
-9,7
+9,7
@@
*
* %sccs.include.redist.c%
*
*
* %sccs.include.redist.c%
*
- * @(#)vfs_vnops.c 8.1
3
(Berkeley) %G%
+ * @(#)vfs_vnops.c 8.1
4
(Berkeley) %G%
*/
#include <sys/param.h>
*/
#include <sys/param.h>
@@
-243,7
+243,8
@@
vn_write(fp, uio, cred)
ioflag |= IO_APPEND;
if (fp->f_flag & FNONBLOCK)
ioflag |= IO_NDELAY;
ioflag |= IO_APPEND;
if (fp->f_flag & FNONBLOCK)
ioflag |= IO_NDELAY;
- if ((fp->f_flag & O_FSYNC) || (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS))
+ if ((fp->f_flag & O_FSYNC) ||
+ (vp->v_mount && (vp->v_mount->mnt_flag & MNT_SYNCHRONOUS)))
ioflag |= IO_SYNC;
VOP_LEASE(vp, p, cred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);
ioflag |= IO_SYNC;
VOP_LEASE(vp, p, cred, LEASE_WRITE);
vn_lock(vp, LK_EXCLUSIVE | LK_RETRY, p);