Complete Yocto mirror with license table for TQMa6UL (2038-compliance)
- 264 license table entries with exact download URLs (224/264 resolved) - Complete sources/ directory with all BitBake recipes - Build configuration: tqma6ul-multi-mba6ulx, spaetzle (musl) - Full traceability for Softwarefreigabeantrag - GCC 13.4.0, Linux 6.6.102, U-Boot 2023.04, musl 1.2.4 - License distribution: GPL-2.0 (24), MIT (23), GPL-2.0+ (18), BSD-3 (16)
This commit is contained in:
Siggi (OpenClaw Agent)
@@ -0,0 +1,238 @@
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From 335947359ce2dd3862cd9f7c49f92eba065dfed4 Mon Sep 17 00:00:00 2001
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From: Su_Laus <sulau@freenet.de>
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Date: Thu, 1 Feb 2024 13:06:08 +0000
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Subject: [PATCH] manpage: Update TIFF documentation about TIFFOpenOptions.rst
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and TIFFOpenOptionsSetMaxSingleMemAlloc() usage and some other small fixes.
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CVE: CVE-2023-52355
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Upstream-Status: Backport [https://gitlab.com/libtiff/libtiff/-/commit/335947359ce2dd3862cd9f7c49f92eba065dfed4]
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Signed-off-by: Yogita Urade <yogita.urade@windriver.com>
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---
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doc/functions/TIFFDeferStrileArrayWriting.rst | 5 +++
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doc/functions/TIFFError.rst | 3 ++
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doc/functions/TIFFOpen.rst | 13 +++---
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doc/functions/TIFFOpenOptions.rst | 44 ++++++++++++++++++-
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doc/functions/TIFFStrileQuery.rst | 5 +++
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doc/libtiff.rst | 31 ++++++++++++-
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6 files changed, 91 insertions(+), 10 deletions(-)
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diff --git a/doc/functions/TIFFDeferStrileArrayWriting.rst b/doc/functions/TIFFDeferStrileArrayWriting.rst
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index 60ee746..705aebc 100644
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--- a/doc/functions/TIFFDeferStrileArrayWriting.rst
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+++ b/doc/functions/TIFFDeferStrileArrayWriting.rst
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@@ -61,6 +61,11 @@ Diagnostics
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All error messages are directed to the :c:func:`TIFFErrorExtR` routine.
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Likewise, warning messages are directed to the :c:func:`TIFFWarningExtR` routine.
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+Note
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+----
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+
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+This functionality was introduced with libtiff 4.1.
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+
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See also
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--------
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diff --git a/doc/functions/TIFFError.rst b/doc/functions/TIFFError.rst
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index 99924ad..cf4b37c 100644
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--- a/doc/functions/TIFFError.rst
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+++ b/doc/functions/TIFFError.rst
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@@ -65,6 +65,9 @@ or :c:func:`TIFFClientOpenExt`.
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Furthermore, a **custom defined data structure** *user_data* for the
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error handler can be given along.
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+Please refer to :doc:`/functions/TIFFOpenOptions` for how to setup the
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+application-specific handler introduced with libtiff 4.5.
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+
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Note
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----
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diff --git a/doc/functions/TIFFOpen.rst b/doc/functions/TIFFOpen.rst
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index db79d7b..adc474f 100644
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--- a/doc/functions/TIFFOpen.rst
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+++ b/doc/functions/TIFFOpen.rst
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@@ -94,8 +94,9 @@ TIFF structure without closing the file handle and afterwards the
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file should be closed using its file descriptor *fd*.
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:c:func:`TIFFOpenExt` (added in libtiff 4.5) is like :c:func:`TIFFOpen`,
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-but options, such as re-entrant error and warning handlers may be passed
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-with the *opts* argument. The *opts* argument may be NULL.
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+but options, such as re-entrant error and warning handlers and a limit in byte
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+that libtiff internal memory allocation functions are allowed to request per call
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+may be passed with the *opts* argument. The *opts* argument may be NULL.
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Refer to :doc:`TIFFOpenOptions` for allocating and filling the *opts* argument
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parameters. The allocated memory for :c:type:`TIFFOpenOptions`
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can be released straight after successful execution of the related
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@@ -105,9 +106,7 @@ can be released straight after successful execution of the related
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but opens a TIFF file with a Unicode filename.
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:c:func:`TIFFFdOpenExt` (added in libtiff 4.5) is like :c:func:`TIFFFdOpen`,
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-but options, such as re-entrant error and warning handlers may be passed
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-with the *opts* argument. The *opts* argument may be NULL.
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-Refer to :doc:`TIFFOpenOptions` for filling the *opts* argument.
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+but options argument *opts* like for :c:func:`TIFFOpenExt` can be passed.
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:c:func:`TIFFSetFileName` sets the file name in the tif-structure
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and returns the old file name.
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@@ -326,5 +325,5 @@ See also
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:doc:`libtiff` (3tiff),
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:doc:`TIFFClose` (3tiff),
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-:doc:`TIFFStrileQuery`,
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-:doc:`TIFFOpenOptions`
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\ No newline at end of file
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+:doc:`TIFFStrileQuery` (3tiff),
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+:doc:`TIFFOpenOptions`
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diff --git a/doc/functions/TIFFOpenOptions.rst b/doc/functions/TIFFOpenOptions.rst
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index 5c67566..23f2975 100644
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--- a/doc/functions/TIFFOpenOptions.rst
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+++ b/doc/functions/TIFFOpenOptions.rst
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@@ -38,12 +38,17 @@ opaque structure and returns a :c:type:`TIFFOpenOptions` pointer.
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:c:func:`TIFFOpenOptionsFree` releases the allocated memory for
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:c:type:`TIFFOpenOptions`. The allocated memory for :c:type:`TIFFOpenOptions`
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can be released straight after successful execution of the related
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-TIFF open"Ext" functions like :c:func:`TIFFOpenExt`.
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+TIFFOpen"Ext" functions like :c:func:`TIFFOpenExt`.
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:c:func:`TIFFOpenOptionsSetMaxSingleMemAlloc` sets parameter for the
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maximum single memory limit in byte that ``libtiff`` internal memory allocation
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functions are allowed to request per call.
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+.. note::
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+ However, the ``libtiff`` external functions :c:func:`_TIFFmalloc`
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+ and :c:func:`_TIFFrealloc` **do not apply** this internal memory
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+ allocation limit set by :c:func:`TIFFOpenOptionsSetMaxSingleMemAlloc`!
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+
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:c:func:`TIFFOpenOptionsSetErrorHandlerExtR` sets the function pointer to
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an application-specific and per-TIFF handle (re-entrant) error handler.
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Furthermore, a pointer to a **custom defined data structure** *errorhandler_user_data*
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@@ -55,6 +60,43 @@ The *errorhandler_user_data* argument may be NULL.
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:c:func:`TIFFOpenOptionsSetErrorHandlerExtR` but for the warning handler,
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which is invoked through :c:func:`TIFFWarningExtR`
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+Example
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+-------
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+
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+::
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+
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+ #include "tiffio.h"
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+
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+ typedef struct MyErrorHandlerUserDataStruct
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+ {
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+ /* ... any user data structure ... */
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+ } MyErrorHandlerUserDataStruct;
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+
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+ static int myErrorHandler(TIFF *tiff, void *user_data, const char *module,
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+ const char *fmt, va_list ap)
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+ {
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+ MyErrorHandlerUserDataStruct *errorhandler_user_data =
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+ (MyErrorHandlerUserDataStruct *)user_data;
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+ /*... code of myErrorHandler ...*/
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+ return 1;
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+ }
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+
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+
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+ main()
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+ {
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+ tmsize_t limit = (256 * 1024 * 1024);
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+ MyErrorHandlerUserDataStruct user_data = { /* ... any data ... */};
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+
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+ TIFFOpenOptions *opts = TIFFOpenOptionsAlloc();
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+ TIFFOpenOptionsSetMaxSingleMemAlloc(opts, limit);
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+ TIFFOpenOptionsSetErrorHandlerExtR(opts, myErrorHandler, &user_data);
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+ TIFF *tif = TIFFOpenExt("foo.tif", "r", opts);
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+ TIFFOpenOptionsFree(opts);
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+ /* ... go on here ... */
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+
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+ TIFFClose(tif);
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+ }
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+
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Note
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----
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diff --git a/doc/functions/TIFFStrileQuery.rst b/doc/functions/TIFFStrileQuery.rst
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index f8631af..7931fe4 100644
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--- a/doc/functions/TIFFStrileQuery.rst
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+++ b/doc/functions/TIFFStrileQuery.rst
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@@ -66,6 +66,11 @@ Diagnostics
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All error messages are directed to the :c:func:`TIFFErrorExtR` routine.
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Likewise, warning messages are directed to the :c:func:`TIFFWarningExtR` routine.
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+Note
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+----
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+
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+This functionality was introduced with libtiff 4.1.
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+
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See also
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--------
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diff --git a/doc/libtiff.rst b/doc/libtiff.rst
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index 6a0054c..d96a860 100644
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--- a/doc/libtiff.rst
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+++ b/doc/libtiff.rst
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@@ -90,11 +90,15 @@ compatibility on machines with a segmented architecture.
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:c:func:`realloc`, and :c:func:`free` routines in the C library.)
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To deal with segmented pointer issues ``libtiff`` also provides
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-:c:func:`_TIFFmemcpy`, :c:func:`_TIFFmemset`, and :c:func:`_TIFFmemmove`
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+:c:func:`_TIFFmemcpy`, :c:func:`_TIFFmemset`, and :c:func:`_TIFFmemcmp`
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routines that mimic the equivalent ANSI C routines, but that are
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intended for use with memory allocated through :c:func:`_TIFFmalloc`
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and :c:func:`_TIFFrealloc`.
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+With ``libtiff`` 4.5 a method was introduced to limit the internal
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+memory allocation that functions are allowed to request per call
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+(see :c:func:`TIFFOpenOptionsSetMaxSingleMemAlloc` and :c:func:`TIFFOpenExt`).
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+
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Error Handling
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--------------
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@@ -106,6 +110,10 @@ routine that can be specified with a call to :c:func:`TIFFSetErrorHandler`.
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Likewise warning messages are directed to a single handler routine
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that can be specified with a call to :c:func:`TIFFSetWarningHandler`
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+Further application-specific and per-TIFF handle (re-entrant) error handler
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+and warning handler can be set. Please refer to :doc:`/functions/TIFFError`
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+and :doc:`/functions/TIFFOpenOptions`.
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+
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Basic File Handling
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-------------------
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@@ -139,7 +147,7 @@ a ``"w"`` argument:
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main()
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{
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TIFF* tif = TIFFOpen("foo.tif", "w");
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- ... do stuff ...
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+ /* ... do stuff ... */
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TIFFClose(tif);
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}
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@@ -157,6 +165,25 @@ to always call :c:func:`TIFFClose` or :c:func:`TIFFFlush` to flush any
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buffered information to a file. Note that if you call :c:func:`TIFFClose`
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you do not need to call :c:func:`TIFFFlush`.
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+.. warning::
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+
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+ In order to prevent out-of-memory issues when opening a TIFF file
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+ :c:func:`TIFFOpenExt` can be used and then the maximum single memory
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+ limit in byte that ``libtiff`` internal memory allocation functions
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+ are allowed to request per call can be set with
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+ :c:func:`TIFFOpenOptionsSetMaxSingleMemAlloc`.
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+
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+Example
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+
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+::
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+
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+ tmsize_t limit = (256 * 1024 * 1024);
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+ TIFFOpenOptions *opts = TIFFOpenOptionsAlloc();
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+ TIFFOpenOptionsSetMaxSingleMemAlloc(opts, limit);
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+ TIFF *tif = TIFFOpenExt("foo.tif", "w", opts);
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+ TIFFOpenOptionsFree(opts);
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+ /* ... go on here ... */
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+
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TIFF Directories
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----------------
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--
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2.40.0
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