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Crash on Win64 when embedded jpeg thumb is corrupted, Issue 2795

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This commit is contained in:
Ingo
2015-05-29 01:06:34 +02:00
parent d0af3d29b8
commit 345ad8bf8c
2 changed files with 89 additions and 83 deletions
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75
rtengine/imageio.cc
View File

@@ -338,16 +338,56 @@ int ImageIO::loadPNG (Glib::ustring fname) {
return IMIO_SUCCESS;
}
typedef struct {
struct jpeg_error_mgr pub; /* "public" fields */
jmp_buf setjmp_buffer; /* for return to caller */
} my_error_mgr;
void my_error_exit (j_common_ptr cinfo) {
/* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
my_error_mgr *myerr = (my_error_mgr*) cinfo->err;
/* Always display the message. */
/* We could postpone this until after returning, if we chose. */
(*cinfo->err->output_message) (cinfo);
/* Return control to the setjmp point */
#if defined( WIN32 ) && defined( __x86_64__ )
__builtin_longjmp(myerr->setjmp_buffer, 1);
#else
longjmp(myerr->setjmp_buffer, 1);
#endif
}
int ImageIO::loadJPEGFromMemory (const char* buffer, int bufsize)
{
jpeg_decompress_struct cinfo;
jpeg_error_mgr jerr;
cinfo.err = my_jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
jpeg_memory_src (&cinfo,(const JOCTET*)buffer,bufsize);
if ( setjmp((reinterpret_cast<rt_jpeg_error_mgr*>(cinfo.src))->error_jmp_buf) == 0 )
{
/* We use our private extension JPEG error handler.
Note that this struct must live as long as the main JPEG parameter
struct, to avoid dangling-pointer problems.
*/
my_error_mgr jerr;
/* We set up the normal JPEG error routines, then override error_exit. */
cinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
/* Establish the setjmp return context for my_error_exit to use. */
#if defined( WIN32 ) && defined( __x86_64__ )
if (__builtin_setjmp(jerr.setjmp_buffer)) {
#else
if (setjmp(jerr.setjmp_buffer)) {
#endif
/* If we get here, the JPEG code has signaled an error.
We need to clean up the JPEG object and return.
*/
jpeg_destroy_decompress(&cinfo);
return IMIO_READERROR;
}
if (pl) {
pl->setProgressStr ("PROGRESSBAR_LOADJPEG");
pl->setProgress (0.0);
@@ -356,7 +396,6 @@ int ImageIO::loadJPEGFromMemory (const char* buffer, int bufsize)
setup_read_icc_profile (&cinfo);
//jpeg_memory_src (&cinfo,buffer,bufsize);
jpeg_read_header(&cinfo, TRUE);
deleteLoadedProfileData();
@@ -396,11 +435,6 @@ int ImageIO::loadJPEGFromMemory (const char* buffer, int bufsize)
pl->setProgress (1.0);
}
return IMIO_SUCCESS;
}
else {
jpeg_destroy_decompress(&cinfo);
return IMIO_READERROR;
}
}
int ImageIO::loadJPEG (Glib::ustring fname) {
@@ -836,25 +870,6 @@ int ImageIO::savePNG (Glib::ustring fname, int compression, volatile int bps) {
}
typedef struct {
struct jpeg_error_mgr pub; /* "public" fields */
jmp_buf setjmp_buffer; /* for return to caller */
} my_error_mgr;
void my_error_exit (j_common_ptr cinfo) {
/* cinfo->err really points to a my_error_mgr struct, so coerce pointer */
my_error_mgr *myerr = (my_error_mgr*) cinfo->err;
/* Always display the message. */
/* We could postpone this until after returning, if we chose. */
(*cinfo->err->output_message) (cinfo);
/* Return control to the setjmp point */
#if defined( WIN32 ) && defined( __x86_64__ )
__builtin_longjmp(myerr->setjmp_buffer, 1);
#else
longjmp(myerr->setjmp_buffer, 1);
#endif
}
// Quality 0..100, subsampling: 1=low quality, 2=medium, 3=high
int ImageIO::saveJPEG (Glib::ustring fname, int quality, int subSamp) {

9
rtengine/rtthumbnail.cc
View File

@@ -183,16 +183,7 @@ Thumbnail* Thumbnail::loadQuickFromRaw (const Glib::ustring& fname, RawMetaDataL
const char* data((const char*)fdata(ri->get_thumbOffset(),ri->get_file()));
if ( (unsigned char)data[1] == 0xd8 )
{
#if defined( __WIN32__ ) && defined( __x86_64__ )
// This is a hack for Issue 2425, because loadJPEGFromMemory crashes on Win64 when jpg marker is incorrect
// (should be 0xff 0xd8, but is 0x02 0xd8 for mrw files)
std::string suffix = fname.length() > 4 ? fname.substr(fname.length()-3) : "";
for (int i = 0; i < suffix.length(); i++) suffix[i] = std::tolower(suffix[i]);
if(suffix != "mrw" || (unsigned char)data[0] == 0xff)
err = img->loadJPEGFromMemory(data,ri->get_thumbLength());
#else
err = img->loadJPEGFromMemory(data,ri->get_thumbLength());
#endif
}
else
{