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glibc/printf-overrun.patch
Andreas Schwab 746e16d2b9 Accepting request 186119 from home:Andreas_Schwab:glibc 
- Update to glibc 2.17.90 85891acadf1b:
  * CVE-2013-2207 Incorrectly granting access to another user's pseudo-terminal
    has been fixed by disabling the use of pt_chown (Bugzilla #15755).
    Distributions can re-enable building and using pt_chown via the new configure
    option `--enable-pt_chown'.  Enabling the use of pt_chown carries with it
    considerable security risks and should only be used if the distribution
    understands and accepts the risks.
  * CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
    #15078).
  * CVE-2013-1914 Stack overflow in getaddrinfo with many results has been
    fixed (Bugzilla #15330).
  * Add support for calling C++11 thread_local object destructors on thread
    and program exit.  This needs compiler support for offloading C++11
    destructor calls to glibc.
  * Improved worst case performance of libm functions with double inputs and
    output.
  * Support for priority inherited mutexes in pthread condition variables on
    non-x86 architectures.
  * Optimized string functions for AArch64.  Implemented by Marcus Shawcroft.
  * Optimized string functions for ARM.  Implemented by Will Newton and
    Richard Henderson.
  * Added a benchmark framework to track performance of functions in glibc.
  * New <math.h> macro named issignaling to check for a signaling NaN (sNaN).
    It is based on draft TS 18661 and currently enabled as a GNU extension.
  * On Linux, the clock function now uses the clock_gettime system call
    for improved precision, rather than old times system call.
  * Added new API functions pthread_getattr_default_np and
    pthread_setattr_default_np to get and set the default pthread
    attributes of a process.
  * Added support for TSX lock elision for pthread mutexes on i386 and x86-64.

OBS-URL: https://build.opensuse.org/request/show/186119
OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=304
2013-08-06 14:52:55 +00:00

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From 1aa92494e55792b568663b5aad81a58fad35490d Mon Sep 17 00:00:00 2001
From: Eric Biggers <ebiggers3@gmail.com>
Date: Thu, 18 Apr 2013 17:46:08 +0200
Subject: [PATCH] PR15362
[BZ #15362]
* libio/fileops.c: Revert problematic fixes for [BZ #11741]
* libio/iofwrite.c: Likewise.
* libio/iofwrite_u.c: Likewise.
* libio/iopadn.c: Likewise.
* libio/iowpadn.c: Likewise.
* stdio-common/vfprintf.c: Fix [BZ #11741] properly by checking whether
_IO_padn() returned the full count written.
---
libio/fileops.c | 21 +++++++++------------
libio/iofwrite.c | 10 +++++-----
libio/iofwrite_u.c | 10 +++++-----
libio/iopadn.c | 2 +-
libio/iowpadn.c | 2 +-
stdio-common/vfprintf.c | 12 ++++++------
6 files changed, 27 insertions(+), 30 deletions(-)
Index: glibc-2.17.90/libio/fileops.c
===================================================================
--- glibc-2.17.90.orig/libio/fileops.c
+++ glibc-2.17.90/libio/fileops.c
@@ -1245,13 +1245,12 @@ _IO_new_file_write (f, data, n)
_IO_ssize_t n;
{
_IO_ssize_t to_do = n;
- _IO_ssize_t count = 0;
while (to_do > 0)
{
- count = (__builtin_expect (f->_flags2
- & _IO_FLAGS2_NOTCANCEL, 0)
- ? write_not_cancel (f->_fileno, data, to_do)
- : write (f->_fileno, data, to_do));
+ _IO_ssize_t count = (__builtin_expect (f->_flags2
+ & _IO_FLAGS2_NOTCANCEL, 0)
+ ? write_not_cancel (f->_fileno, data, to_do)
+ : write (f->_fileno, data, to_do));
if (count < 0)
{
f->_flags |= _IO_ERR_SEEN;
@@ -1263,7 +1262,7 @@ _IO_new_file_write (f, data, n)
n -= to_do;
if (f->_offset >= 0)
f->_offset += n;
- return count < 0 ? count : n;
+ return n;
}
_IO_size_t
@@ -1323,13 +1322,11 @@ _IO_new_file_xsputn (f, data, n)
_IO_size_t block_size, do_write;
/* Next flush the (full) buffer. */
if (_IO_OVERFLOW (f, EOF) == EOF)
- /* If nothing else has to be written or nothing has been written, we
- must not signal the caller that the call was even partially
- successful. */
- return (to_do == 0 || to_do == n) ? EOF : n - to_do;
+ /* If nothing else has to be written we must not signal the
+ caller that everything has been written. */
+ return to_do == 0 ? EOF : n - to_do;
- /* Try to maintain alignment: write a whole number of blocks.
- dont_write is what gets left over. */
+ /* Try to maintain alignment: write a whole number of blocks. */
block_size = f->_IO_buf_end - f->_IO_buf_base;
do_write = to_do - (block_size >= 128 ? to_do % block_size : 0);
Index: glibc-2.17.90/libio/iofwrite.c
===================================================================
--- glibc-2.17.90.orig/libio/iofwrite.c
+++ glibc-2.17.90/libio/iofwrite.c
@@ -42,12 +42,12 @@ _IO_fwrite (buf, size, count, fp)
if (_IO_vtable_offset (fp) != 0 || _IO_fwide (fp, -1) == -1)
written = _IO_sputn (fp, (const char *) buf, request);
_IO_release_lock (fp);
- /* We are guaranteed to have written all of the input, none of it, or
- some of it. */
- if (written == request)
+ /* We have written all of the input in case the return value indicates
+ this or EOF is returned. The latter is a special case where we
+ simply did not manage to flush the buffer. But the data is in the
+ buffer and therefore written as far as fwrite is concerned. */
+ if (written == request || written == EOF)
return count;
- else if (written == EOF)
- return 0;
else
return written / size;
}
Index: glibc-2.17.90/libio/iofwrite_u.c
===================================================================
--- glibc-2.17.90.orig/libio/iofwrite_u.c
+++ glibc-2.17.90/libio/iofwrite_u.c
@@ -44,12 +44,12 @@ fwrite_unlocked (buf, size, count, fp)
if (_IO_fwide (fp, -1) == -1)
{
written = _IO_sputn (fp, (const char *) buf, request);
- /* We are guaranteed to have written all of the input, none of it, or
- some of it. */
- if (written == request)
+ /* We have written all of the input in case the return value indicates
+ this or EOF is returned. The latter is a special case where we
+ simply did not manage to flush the buffer. But the data is in the
+ buffer and therefore written as far as fwrite is concerned. */
+ if (written == request || written == EOF)
return count;
- else if (written == EOF)
- return 0;
}
return written / size;
Index: glibc-2.17.90/libio/iopadn.c
===================================================================
--- glibc-2.17.90.orig/libio/iopadn.c
+++ glibc-2.17.90/libio/iopadn.c
@@ -59,7 +59,7 @@ _IO_padn (fp, pad, count)
w = _IO_sputn (fp, padptr, PADSIZE);
written += w;
if (w != PADSIZE)
- return w == EOF ? w : written;
+ return written;
}
if (i > 0)
Index: glibc-2.17.90/libio/iowpadn.c
===================================================================
--- glibc-2.17.90.orig/libio/iowpadn.c
+++ glibc-2.17.90/libio/iowpadn.c
@@ -65,7 +65,7 @@ _IO_wpadn (fp, pad, count)
w = _IO_sputn (fp, (char *) padptr, PADSIZE);
written += w;
if (w != PADSIZE)
- return w == EOF ? w : written;
+ return written;
}
if (i > 0)
Index: glibc-2.17.90/stdio-common/vfprintf.c
===================================================================
--- glibc-2.17.90.orig/stdio-common/vfprintf.c
+++ glibc-2.17.90/stdio-common/vfprintf.c
@@ -90,13 +90,13 @@
do { \
if (width > 0) \
{ \
- unsigned int d = _IO_padn (s, (Padchar), width); \
- if (__glibc_unlikely (d == EOF)) \
+ _IO_ssize_t written = _IO_padn (s, (Padchar), width); \
+ if (__glibc_unlikely (written != width)) \
{ \
done = -1; \
goto all_done; \
} \
- done_add (d); \
+ done_add (written); \
} \
} while (0)
# define PUTC(C, F) _IO_putc_unlocked (C, F)
@@ -119,13 +119,13 @@
do { \
if (width > 0) \
{ \
- unsigned int d = _IO_wpadn (s, (Padchar), width); \
- if (__glibc_unlikely (d == EOF)) \
+ _IO_ssize_t written = _IO_wpadn (s, (Padchar), width); \
+ if (__glibc_unlikely (written != width)) \
{ \
done = -1; \
goto all_done; \
} \
- done_add (d); \
+ done_add (written); \
} \
} while (0)
# define PUTC(C, F) _IO_putwc_unlocked (C, F)
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