[PATCH v2 1/6] Use KF_PATH to verify the size of a struct kinfo_file.

[John Baldwin <jhb@FreeBSD.org>]

fbsd_core_vnode_path needs to use the offset of the kf_path member of
struct kinfo_file as the minimum size of a struct kinfo_file object.
However, it was using KVE_PATH instead due to a copy and paste bug.

While here, fix another copy and paste bug in the error message for a
truncated kinfo_file object.

gdb/ChangeLog:

	* fbsd-tdep.c (fbsd_core_vnode_path): Use KF_PATH instead of
	KVE_PATH.
---
 gdb/ChangeLog   | 5 +++++
 gdb/fbsd-tdep.c | 6 +++---
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 454c45f9ad..d602e63eb0 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2018-09-12  John Baldwin  <jhb@FreeBSD.org>
+
+	* fbsd-tdep.c (fbsd_core_vnode_path): Use KF_PATH instead of
+	KVE_PATH.
+
 2018-09-12  John Baldwin  <jhb@FreeBSD.org>
 
 	* fbsd-nat.c (fbsd_nat_target::info_proc): Remove unused variable.
diff --git a/gdb/fbsd-tdep.c b/gdb/fbsd-tdep.c
index ed43087169..48544b5370 100644
--- a/gdb/fbsd-tdep.c
+++ b/gdb/fbsd-tdep.c
@@ -781,13 +781,13 @@ fbsd_core_vnode_path (struct gdbarch *gdbarch, int fd)
   /* Skip over the structure size.  */
   descdata += 4;
 
-  while (descdata + KVE_PATH < descend)
+  while (descdata + KF_PATH < descend)
     {
       ULONGEST structsize;
 
       structsize = bfd_get_32 (core_bfd, descdata + KF_STRUCTSIZE);
-      if (structsize < KVE_PATH)
-	error (_("malformed core note - vmmap entry too small"));
+      if (structsize < KF_PATH)
+	error (_("malformed core note - file structure too small"));
 
       if (bfd_get_32 (core_bfd, descdata + KF_TYPE) == KINFO_FILE_TYPE_VNODE
 	  && bfd_get_signed_32 (core_bfd, descdata + KF_FD) == fd)
-- 
2.18.0