[Bug network/16071] Segmentation fault in getaddrinfo() when processing entry mapping to long list of AF_INET address structures

["siddhesh at redhat dot com" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=16071

Siddhesh Poyarekar <siddhesh at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #1 from Siddhesh Poyarekar <siddhesh at redhat dot com> ---
Fixed in master:

commit 977f4b31b7ca4a4e498c397f3fd70510694bbd86
Author: Siddhesh Poyarekar <siddhesh@redhat.com>
Date:   Wed Oct 30 16:13:37 2013 +0530

    Fix reads for sizes larger than INT_MAX in AF_INET lookup

    Currently for AF_INET lookups from the hosts file, buffer sizes larger
    than INT_MAX silently overflow and may result in access beyond bounds
    of a buffer.  This happens when the number of results in an AF_INET
    lookup in /etc/hosts are very large.

    There are two aspects to the problem.  One problem is that the size
    computed from the buffer size is stored into an int, which results in
    overflow for large sizes.  Additionally, even if this size was
    expanded, the function used to read content into the buffer (fgets)
    accepts only int sizes.  As a result, the fix is to have a function
    wrap around fgets that calls it multiple times with int sizes if
    necessary.

 ChangeLog                 |  8 ++++++++
 NEWS                      |  2 +-
 nss/nss_files/files-XXX.c | 59
+++++++++++++++++++++++++++++++++++++++++++++++++++--------
 3 files changed, 60 insertions(+), 9 deletions(-)

-- 
You are receiving this mail because:
You are on the CC list for the bug.