squashfs-tools-ng.git/lib, branch v1.1.2

libfstream: sanity check the buffer size in the gzip stream compressor

2021-06-25T13:15:05+00:00

Signed-off-by: David Oberhollenzer

Add default cases for every switch block

2021-06-25T13:12:41+00:00

Signed-off-by: David Oberhollenzer

Remove casual un-const casting in various places

2021-06-25T13:12:41+00:00

Signed-off-by: David Oberhollenzer

libutil: cleanup alignment trickery in mempool

2021-06-25T13:12:41+00:00

- Store the return value of the page allocation directly into the pool variable instead of an intermediate unsigned char pointer. - Make the blob[] array the same type as the bitmap, this saves us manual alignment trickery. - Cleanup the pointer arithmetic, let the compiler do the sizeof() multiplication. - Use uintptr_t for the manual alignment of the data pointer, so we don't run into signdness problems there. Signed-off-by: David Oberhollenzer

libsquashfs: get rid of potentially unaligned access and VLAs

2021-06-25T13:12:41+00:00

The same problem with the meta data header again, 16 bit read from a buffer: copy the buffer data into a 16 bit variable instead of casting to something potentially unaligned. Signed-off-by: David Oberhollenzer

libcommon: remove potentially un-aligned access in LZO compressor

2021-06-25T13:12:41+00:00

When accessing the 16 bit header, don't cast the buffer pointer to an uint16_t pointer, the result might not be aligned propperly. Instead memcpy to and from an uint16_t. Signed-off-by: David Oberhollenzer

libfstree: guard against possible overflow in readlink()

2021-06-25T13:12:41+00:00

*in theory*, say on a 32 bit system, we could have a 32 bit size_t and a 64 bit off_t. If the filesystem permitted this, we *could* then have a symlink with a target > 4G. Or the target is exacetely 4G, but adding a null-terminator could exceed addressable memory. This commit adds a check to guard against such an overflow and throw an error, instead of silently wrapping around. Signed-off-by: David Oberhollenzer

libfstree: guard against link count and inode number overflow

2021-06-25T13:12:41+00:00

If the hard link counter or the inode number counter overflow the maximum representable value (for SquashFS 16 bit and 32 bit respecitively), abort with an error message. Signed-off-by: David Oberhollenzer

libfstream: guard against potential integer overflows

2021-06-25T13:12:41+00:00

The differen compressor libraries use differnt integer types to tally the buffer sizes. The libfstream library uses size_t, which may be bigger than the actualy types, potentially causing an overflow if trying to compress to much at once. Signed-off-by: David Oberhollenzer

libsquashfs: fix: also preserve alignment flag in block processor

2021-06-07T09:28:47+00:00

Currently, when the block processor aggreagtes fragments into a fragment block, it applies the "don't compress" flag if any of the original framgnets has it set, but the "align to device block" flag is lost. This commit ensures that both flags get applied to the fragment block if set. Signed-off-by: David Oberhollenzer