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Don't read past end of buffer in fmemopen

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This commit is contained in:
Andreas Schwab
2011-03-04 00:48:00 -05:00
committed by Ulrich Drepper
parent a5543c6ad8
commit 9d25c392ba
2 changed files with 6 additions and 2 deletions
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4
ChangeLog
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@@ -1,3 +1,7 @@
2011-03-03 Andreas Schwab <schwab@redhat.com>
* libio/fmemopen.c (fmemopen): Don't read past end of buffer.
2011-03-03 Roland McGrath <roland@redhat.com> 2011-03-03 Roland McGrath <roland@redhat.com>
* setjmp/bits/setjmp2.h: Canonicalize comment formatting. * setjmp/bits/setjmp2.h: Canonicalize comment formatting.

4
libio/fmemopen.c
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@@ -1,5 +1,5 @@
/* Fmemopen implementation. /* Fmemopen implementation.
Copyright (C) 2000, 2002, 2005, 2006, 2008, 2009 Copyright (C) 2000, 2002, 2005, 2006, 2008, 2009, 2011
Free Software Foundation, Inc. Free Software Foundation, Inc.
This file is part of the GNU C Library. This file is part of the GNU C Library.
Contributed by Hanno Mueller, kontakt@hanno.de, 2000. Contributed by Hanno Mueller, kontakt@hanno.de, 2000.
@@ -243,7 +243,7 @@ fmemopen (void *buf, size_t len, const char *mode)
if (mode[0] == 'w') if (mode[0] == 'w')
c->buffer[0] = '\0'; c->buffer[0] = '\0';
c->maxpos = strlen (c->buffer); c->maxpos = strnlen (c->buffer, len);
if (mode[0] == 'a') if (mode[0] == 'a')
c->pos = c->maxpos; c->pos = c->maxpos;