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The two dimensional array p->posSlotEncoder[4][64] is being dereferenced using the GetLenToPosState() macro which checks if len is less than 5, and if so subtracts 2 from it. If len = 0, that is 0 - 2 = 4294967294. Obviously we don't want to dereference that far out so we check if the position found is greater or equal kNumLenToPosStates (4) and bail out. N.B.: Upstream LZMA 18.05 and later has this function completely rewritten without any history. Fixes: CID 51526 Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'