Fix multiple vulnerabilities (closes: #850432)

- New patch 934_menu.patch to fix buffer overflow (tats/w3m#49)
- New patch 935_shiftanchor.patch to fix buffer overflow (tats/w3m#62)
- New patch 936_metarefresh.patch to fix buffer overflow (tats/w3m#63)
- New patch 937_lineproc0.patch to fix buffer overflow (tats/w3m#67)
- New patch 938_lineproc2body.patch to fix buffer overflow (tats/w3m#61)
- New patch 939_textarea.patch to fix buffer overflow (tats/w3m#58)
- New patch 940_tabattr.patch to fix buffer overflow (tats/w3m#60)
- New patch 941_integeredwidth.patch to fix buffer overflow (tats/w3m#70)
- New patch 942_tridvalue.patch to fix buffer overflow (tats/w3m#71)
- New patch 943_pushlink.patch to fix buffer overflow (tats/w3m#64, #66)
- New patch 944_lineproc0.patch to fix use after free (tats/w3m#65)
- New patch 945_wtfstrwidth.patch to fix buffer overflow (tats/w3m#57)
- New patch 946_strnewsize.patch to fix buffer overflow (tats/w3m#72)
- New patch 947_realcolumn.patch to fix buffer overflow (tats/w3m#69)
- New patch 948_getmclen.patch to fix buffer overflow
  (tats/w3m#59, #73, #74, #75, #76, #78, #79, #80, #83, #84)
- New patch 949_wtftowcs.patch to fix buffer overflow (tats/w3m#77)
- New patch 950_textarea.patch to fix infinite loop (tats/w3m#85)
- New patch 951_lineproc0.patch to fix use after free (tats/w3m#81)
- New patch 952_formupdatebuffer.patch to fix buffer overflow (tats/w3m#82)
- New patch 953_formupdateline.patch to fix buffer overflow
  (tats/w3m#68#issuecomment-266214643)
- New patch 954_wtfparse1.patch to fix buffer overflow (tats/w3m#68)

1 files changed, 32 insertions, 0 deletions

diff --git a/debian/patches/943_pushlink.patch b/debian/patches/943_pushlink.patch
new file mode 100644
index 0000000..3b24cb4
--- /dev/null
+++ b/debian/patches/943_pushlink.patch
@@ -0,0 +1,32 @@
+Subject: Prevent negative values for offset and pos in push_link()
+From: Tatsuya Kinoshita <tats@debian.org>
+Bug-Debian: https://github.com/tats/w3m/issues/64
+Bug-Debian: https://github.com/tats/w3m/issues/66
+Origin: https://anonscm.debian.org/cgit/collab-maint/w3m.git/commit/?id=ecf57714191b77142da74035b748262cdc80dfb7
+
+---
+ file.c | 8 ++++++--
+ 1 file changed, 6 insertions(+), 2 deletions(-)
+
+diff --git a/file.c b/file.c
+index 330ae3a..483180a 100644
+--- a/file.c
++++ b/file.c
+@@ -2307,8 +2307,12 @@ push_link(int cmd, int offset, int pos)
+     struct link_stack *p;
+     p = New(struct link_stack);
+     p->cmd = cmd;
+-    p->offset = offset;
+-    p->pos = pos;
++    p->offset = (short)offset;
++    if (p->offset < 0)
++	p->offset = 0;
++    p->pos = (short)pos;
++    if (p->pos < 0)
++	p->pos = 0;
+     p->next = link_stack;
+     link_stack = p;
+ }
+-- 
+2.10.2
+