[Bug 658907] Re: crash in getlogin()

[Martin Pitt]

SRU ACK, please upload.

-- 
crash in getlogin()
https://bugs.launchpad.net/bugs/658907
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Status in “eglibc” package in Ubuntu: New

Bug description:
In maverick with libc6 2.12.1-0ubuntu6, the cvs postinst can sometimes trigger the following crash inside getlogin():

Program received signal SIGSEGV, Segmentation fault.
#0  0x00321755 in internal_getpwuid_r (uid=<value optimized out>,
    result=<value optimized out>, ent=0xbfffb65c,
    buffer=0xbfffef60 "festival", buflen=8192, errnop=0xb7fe6688)
    at nss_compat/compat-pwd.c:946
#1  0x00321b63 in _nss_compat_getpwuid_r (uid=4294967295, pwd=0xbffff384,
    buffer=0xbfffef60 "festival", buflen=8192, errnop=0xb7fe6688)
    at nss_compat/compat-pwd.c:1112
#2  0x0023b41d in __getpwuid_r (uid=4294967295, resbuf=0xbffff384,
    buffer=0xbfffef60 "festival", buflen=8192, result=0xbffff3ac)
    at ../nss/getXXbyYY_r.c:253
#3  0x0025d1fc in __getlogin_r_loginuid (name=0x2fed40 "", namesize=33)
    at ../sysdeps/unix/sysv/linux/getlogin_r.c:63
#4  0x0025cefd in getlogin () at ../sysdeps/unix/sysv/linux/getlogin.c:35

This bug was introduced by glibc-2.12~113 (so it is a regression from 2.11.x and earlier):
  http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=c8727fa6e5073d28ed6d0eb40a006ac2c1b9f9f3

It was fixed in the first three commits after glibc-2.12.1:
  http://sourceware.org/git/?p=glibc.git;a=shortlog;h=refs/heads/release/2.12/master
specifically
  http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=5305f9b09df3450b69d45bcf84d45afa6d9fd577
  http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=d48b760747e6e6eac5d294667a2aac94f55b7649
  http://sourceware.org/git/?p=glibc.git;a=commitdiff;h=d8d583fc44fbdc7014ae1f684589afd8214e73be