[mc] fix couple of segfaults (#907045, #912033, #923415)

[Jindrich Novy]

commit 6a9db2c373841b0081689eafe95514a2e0ddd039
Author: Jindrich Novy <jnovy at redhat.com>
Date:   Thu Mar 21 11:05:05 2013 +0100

    fix couple of segfaults (#907045, #912033, #923415)

 mc-VFSsegfault.patch    |   12 ++++++++++++
 mc-widgetsegfault.patch |   12 ++++++++++++
 mc.spec                 |   10 +++++++++-
 3 files changed, 33 insertions(+), 1 deletions(-)
---
diff --git a/mc-VFSsegfault.patch b/mc-VFSsegfault.patch
new file mode 100644
index 0000000..0ef9d8b
--- /dev/null
+++ b/mc-VFSsegfault.patch
@@ -0,0 +1,12 @@
+diff -up mc-4.8.7/lib/vfs/direntry.c.VFSsegfault mc-4.8.7/lib/vfs/direntry.c
+--- mc-4.8.7/lib/vfs/direntry.c.VFSsegfault	2012-12-27 09:13:20.000000000 +0100
++++ mc-4.8.7/lib/vfs/direntry.c	2013-03-21 10:54:15.344172569 +0100
+@@ -656,6 +656,8 @@ vfs_s_close (void *fh)
+     int res = 0;
+     struct vfs_class *me = FH_SUPER->me;
+ 
++    if (!me) return -1;
++
+     FH_SUPER->fd_usage--;
+     if (!FH_SUPER->fd_usage)
+         vfs_stamp_create (me, FH_SUPER);
diff --git a/mc-widgetsegfault.patch b/mc-widgetsegfault.patch
new file mode 100644
index 0000000..bcfb0bb
--- /dev/null
+++ b/mc-widgetsegfault.patch
@@ -0,0 +1,12 @@
+diff -up mc-4.8.7/lib/widget/widget-common.h.widgetsegfault mc-4.8.7/lib/widget/widget-common.h
+--- mc-4.8.7/lib/widget/widget-common.h.widgetsegfault	2012-12-10 22:04:32.000000000 +0100
++++ mc-4.8.7/lib/widget/widget-common.h	2013-03-21 09:38:39.000000000 +0100
+@@ -153,7 +153,7 @@ gboolean mouse_global_in_widget (const G
+ static inline cb_ret_t
+ send_message (void *w, void *sender, widget_msg_t msg, int parm, void *data)
+ {
+-    return WIDGET (w)->callback (WIDGET (w), WIDGET (sender), msg, parm, data);
++    return w ? WIDGET (w)->callback (WIDGET (w), WIDGET (sender), msg, parm, data) : 1;
+ }
+ 
+ #endif /* MC__WIDGET_INTERNAL_H */
diff --git a/mc.spec b/mc.spec
index ad0ffbb..4a287ce 100644
--- a/mc.spec
+++ b/mc.spec
@@ -1,7 +1,7 @@
 Summary:	User-friendly text console file manager and visual shell
 Name:		mc
 Version:	4.8.7
-Release:	2%{?dist}
+Release:	3%{?dist}
 Epoch:		1
 License:	GPLv3+
 Group:		System Environment/Shells
@@ -11,6 +11,8 @@ BuildRoot:	%{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:	glib2-devel e2fsprogs-devel slang-devel gpm-devel groff
 BuildRequires:	aspell-devel libssh2-devel >= 1.2.5
 Patch0:		mc-cpiosegfault.patch
+Patch1:		mc-widgetsegfault.patch
+Patch2:		mc-VFSsegfault.patch
 
 %description
 Midnight Commander is a visual shell much like a file manager, only
@@ -22,6 +24,8 @@ specific files.
 %prep
 %setup -q
 %patch0 -p1 -b .cpiosegfault
+%patch1 -p1 -b .widgetsegfault
+%patch2 -p1 -b .VFSsegfault
 
 %build
 export CFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE $RPM_OPT_FLAGS -Wno-strict-aliasing"
@@ -77,6 +81,10 @@ rm -rf $RPM_BUILD_ROOT
 %dir %{_libexecdir}/mc/ext.d
 
 %changelog
+* Thu Mar 21 2013 Jindrich Novy <jnovy at redhat.com> 4.8.7-3
+- attempt to fix segfault while passing messages to widgets (#907045, #912033)
+- fix possible segfault when freeing a VFS (#923415)
+
 * Thu Mar 14 2013 Jindrich Novy <jnovy at redhat.com> 4.8.7-2
 - fix segfault in cpio VFS while reading corrupted RPM (#921414)