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Update to PackJPG 2.5i.

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Fixes crash with malformed Jpeg.
This commit is contained in:
Moinak Ghosh 2013-12-28 21:56:03 +05:30
parent f22a80f5e2
commit 35043a74b0
2 changed files with 11 additions and 3 deletions
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4
filters/packjpg/aricoder.cpp
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@ -280,7 +280,7 @@ model_s::model_s( int max_s, int max_c, int max_o, int c_lim )
null_table->links[ i ] = start_table;
// alloc memory for storage & contexts
storage = ( table_s** ) calloc( max_order + 2, sizeof( table_s* ) );
storage = ( table_s** ) calloc( max_order + 3, sizeof( table_s* ) );
if ( storage == NULL ) ERROR_EXIT;
contexts = storage + 1;
@ -758,7 +758,7 @@ model_b::model_b( int max_c, int max_o, int c_lim )
null_table->links[ i ] = start_table;
// alloc memory for storage & contexts
storage = ( table** ) calloc( max_order + 2, sizeof( table* ) );
storage = ( table** ) calloc( max_order + 3, sizeof( table* ) );
if ( storage == NULL ) ERROR_EXIT;
contexts = storage + 1;

10
filters/packjpg/packjpg.cpp
View file

@ -1,5 +1,5 @@
/*
packJPG v2.5h (12/07/2013)
packJPG v2.5i (12/12/2013)
~~~~~~~~~~~~~~~~~~~~~~~~~~
packJPG is a compression program specially designed for further
@ -229,6 +229,9 @@ v2.5g (09/14/13) (public)
v2.5h (12/07/13) (public)
- added a warning for inefficient huffman coding (thanks to Moinak Ghosh)
v2.5i (12/12/13) (public)
- fixed possible crash with malformed JPEG (thanks to Moinak Ghosh)
Acknowledgements
~~~~~~~~~~~~~~~~
@ -3723,6 +3726,11 @@ INTERN bool jpg_parse_jfif( unsigned char type, unsigned int len, unsigned char*
imgheight = B_SHORT( segment[ hpos + 1 ], segment[ hpos + 2 ] );
imgwidth = B_SHORT( segment[ hpos + 3 ], segment[ hpos + 4 ] );
cmpc = segment[ hpos + 5 ];
if ( ( imgwidth == 0 ) || ( imgheight == 0 ) ) {
sprintf( errormessage, "resolution is %ix%i, possible malformed JPEG", imgwidth, imgheight );
errorlevel = 2;
return false;
}
if ( cmpc > 4 ) {
sprintf( errormessage, "image has %i components, max 4 are supported", cmpc );
errorlevel = 2;