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* [Bug libc/11571] getlogin_r (NULL, 0) segfaults
[not found] <bug-11571-131@http.sourceware.org/bugzilla/>
@ 2014-06-30 18:07 ` fweimer at redhat dot com
0 siblings, 0 replies; 4+ messages in thread
From: fweimer at redhat dot com @ 2014-06-30 18:07 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=11571
Florian Weimer <fweimer at redhat dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Flags| |security-
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* [Bug libc/11571] getlogin_r (NULL, 0) segfaults
2010-05-05 16:01 [Bug libc/11571] New: " rjones at redhat dot com
2010-05-05 16:03 ` [Bug libc/11571] " rjones at redhat dot com
2010-05-05 16:09 ` rjones at redhat dot com
@ 2010-05-05 16:45 ` drepper at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: drepper at redhat dot com @ 2010-05-05 16:45 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From drepper at redhat dot com 2010-05-05 16:45 -------
Fixed in git.
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What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |FIXED
http://sourceware.org/bugzilla/show_bug.cgi?id=11571
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* [Bug libc/11571] getlogin_r (NULL, 0) segfaults
2010-05-05 16:01 [Bug libc/11571] New: " rjones at redhat dot com
2010-05-05 16:03 ` [Bug libc/11571] " rjones at redhat dot com
@ 2010-05-05 16:09 ` rjones at redhat dot com
2010-05-05 16:45 ` drepper at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: rjones at redhat dot com @ 2010-05-05 16:09 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From rjones at redhat dot com 2010-05-05 16:08 -------
Problem is:
getlogin_r.c:84 strncpy (name, pwd.pw_name, namesize - 1);
http://sourceware.org/git/?
p=glibc.git;a=blob;f=sysdeps/unix/sysv/linux/getlogin_r.c;h=d9c66fe2598fb9dbc0fe1a6577f5db420598
0392;hb=HEAD#l84
namesize == 0, so it calls strncpy with -1 as the 3rd parameter.
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http://sourceware.org/bugzilla/show_bug.cgi?id=11571
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* [Bug libc/11571] getlogin_r (NULL, 0) segfaults
2010-05-05 16:01 [Bug libc/11571] New: " rjones at redhat dot com
@ 2010-05-05 16:03 ` rjones at redhat dot com
2010-05-05 16:09 ` rjones at redhat dot com
2010-05-05 16:45 ` drepper at redhat dot com
2 siblings, 0 replies; 4+ messages in thread
From: rjones at redhat dot com @ 2010-05-05 16:03 UTC (permalink / raw)
To: glibc-bugs
------- Additional Comments From rjones at redhat dot com 2010-05-05 16:03 -------
Note the problem is the zero length, not the
NULL pointer. For example this also segfaults:
#include <unistd.h>
main ()
{
char buffer[10000];
getlogin_r (buffer, 0);
}
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end of thread, other threads:[~2014-06-30 18:07 UTC | newest]
Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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[not found] <bug-11571-131@http.sourceware.org/bugzilla/>
2014-06-30 18:07 ` [Bug libc/11571] getlogin_r (NULL, 0) segfaults fweimer at redhat dot com
2010-05-05 16:01 [Bug libc/11571] New: " rjones at redhat dot com
2010-05-05 16:03 ` [Bug libc/11571] " rjones at redhat dot com
2010-05-05 16:09 ` rjones at redhat dot com
2010-05-05 16:45 ` drepper at redhat dot com
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