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a55f36211e
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Thiago Macieira a55f36211e Fix the JPEG EXIF reader to deal with some broken/corrupt files 
We parse the EXIF header in order to get the proper orientation, so
let's be a bit more careful in what we accept. This patch adds better
handling for reading past the end of the stream, plus it limits the
number of IFDs read (to avoid processing too much data) and deals with a
pathological case of the EXIF file format: EXIF (due to its TIFF
origins) permits the offset to the next IFD to be backwards in the file,
which means it could result in a loop or pointing to plain corrupt data.
We disallow any backwards pointers, since it seems that's what other
decoders do (libexif, for example).

Change-Id: Iaeecaffe26af4535b416fffd1489332db92e3888
(cherry picked from 5.6 commit 02150649f95b8f46f826e6e002be3fa0b6d009bc)
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
2016-12-01 08:17:04 +00:00
bin Merge remote-tracking branch 'origin/5.6' into 5.7 2016-09-28 11:51:35 +02:00
config.tests Merge remote-tracking branch 'origin/5.6' into 5.7 2016-09-16 23:16:25 +02:00
dist Add changes file for 5.7.1 2016-11-03 05:12:00 +00:00
doc Merge remote-tracking branch 'origin/5.6' into 5.7 2016-10-01 22:15:55 +02:00
examples Merge remote-tracking branch 'origin/5.6' into 5.7 2016-09-16 23:16:25 +02:00
lib Purge all fonts 2015-08-18 19:59:14 +00:00
mkspecs qmake: fix installation of asset catalog files 2016-11-17 19:34:21 +00:00
qmake Merge remote-tracking branch 'origin/5.6' into 5.7 2016-10-01 22:15:55 +02:00
src Fix the JPEG EXIF reader to deal with some broken/corrupt files 2016-12-01 08:17:04 +00:00
tests Fix the JPEG EXIF reader to deal with some broken/corrupt files 2016-12-01 08:17:04 +00:00
tools configure: Determine MSVC version by evaluating macro _MSC_FULL_VER 2016-10-31 05:03:45 +00:00
util Re-generate QLocale data from CLDR v29 2016-04-08 03:51:18 +00:00
.gitattributes Update the git-archive export options 2012-09-07 15:39:31 +02:00
.gitignore Update gitignore 2016-08-19 10:43:26 +00:00
.qmake.conf Bump version 2016-07-28 13:50:04 +02:00
.tag Update the git-archive export options 2012-09-07 15:39:31 +02:00
configure Merge remote-tracking branch 'origin/5.6' into 5.7 2016-08-29 08:13:40 +02:00
configure.bat Don't compile configure.exe with clang-cl.exe if cl.exe is available 2016-07-21 00:16:04 +00:00
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INSTALL Doc: Update links in INSTALL file 2015-02-16 09:06:41 +00:00
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qtbase.pro Merge remote-tracking branch 'origin/5.6' into 5.7 2016-10-01 22:15:55 +02:00
sync.profile make a proper header-only module for QtZlib 2015-11-17 20:22:17 +00:00