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Bug#814239: marked as done (gcc-4.9: debian/patches/ada-symbolic-tracebacks.diff use snprintf return value without check)

Your message dated Tue, 20 Sep 2016 22:15:11 +0000
with message-id <[🔎] E1bmTJn-0005QY-0D@franck.debian.org>
and subject line Bug#838316: Removed package(s) from unstable
has caused the Debian Bug report #814239,
regarding gcc-4.9: debian/patches/ada-symbolic-tracebacks.diff use snprintf return value without check
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

(NB: If you are a system administrator and have no idea what this
message is talking about, this may indicate a serious mail system
misconfiguration somewhere. Please contact owner@bugs.debian.org
immediately.)


-- 
814239: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=814239
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: gcc-4.9
Version: 4.9.2-10
Severity: normal
Tags: security
During code search, I found potentially problematic code in debian/patches/ada-symbolic-tracebacks.diff: it uses snprintf() results without checking its range, like this: 

+            else {
+ *len += snprintf(s, (max_len - (*len)), "%p at %s",addrs[i], line); 
+            }
+            s = buf + (*len);
When formatted string would overflow supplied buffer or other error happens, snprintf returns value larger than buffer size or -1. In both cases, if you directly add it to the pointer, like in the above code, bad things will happen. 

(Same patch seems used with other versions of gcc-* packages.)

-- System Information:
Debian Release: 8.1
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 3.16.0-4-amd64 (SMP w/2 CPU cores)
Locale: LANG=ru_RU.KOI8-R, LC_CTYPE=ru_RU.KOI8-R (charmap=KOI8-R)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gcc-4.9 depends on:
ii  binutils        2.25-5
ii  cpp-4.9         4.9.2-10
ii  gcc-4.9-base    4.9.2-10
ii  libc6           2.19-18
ii  libcloog-isl4   0.18.2-1+b2
ii  libgcc-4.9-dev  4.9.2-10
ii  libgmp10        2:6.0.0+dfsg-6
ii  libisl10        0.12.2-2
ii  libmpc3         1.0.2-1
ii  libmpfr4        3.1.2-2
ii  zlib1g          1:1.2.8.dfsg-2+b1

Versions of packages gcc-4.9 recommends:
ii  libc6-dev  2.19-18

Versions of packages gcc-4.9 suggests:
ii  gcc-4.9-doc       4.9.1-3
pn  gcc-4.9-locales   <none>
ii  gcc-4.9-multilib  4.9.2-10
pn  libasan1-dbg      <none>
pn  libatomic1-dbg    <none>
pn  libcilkrts5-dbg   <none>
pn  libgcc1-dbg       <none>
pn  libgomp1-dbg      <none>
pn  libitm1-dbg       <none>
pn  liblsan0-dbg      <none>
pn  libquadmath0-dbg  <none>
pn  libtsan0-dbg      <none>
pn  libubsan0-dbg     <none>

-- no debconf information

--- End Message ---
--- Begin Message --- 
Version: 4.9.4-2+rm

Dear submitter,

as the package gcc-4.9 has just been removed from the Debian archive
unstable we hereby close the associated bug reports.  We are sorry
that we couldn't deal with your issue properly.

For details on the removal, please see https://bugs.debian.org/838316

The version of this package that was in Debian prior to this removal
can still be found using http://snapshot.debian.org/.

This message was generated automatically; if you believe that there is
a problem with it please contact the archive administrators by mailing
ftpmaster@ftp-master.debian.org.

Debian distribution maintenance software
pp.
Chris Lamb (the ftpmaster behind the curtain)

--- End Message ---
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