[PATCH v2 00/14] lib/mpi: bug fixes and cleanup

Nicolai Stange
2016-03-20T12:32:22Z

The original v1 can be found here:

http://lkml.kernel.org/g/1458237606-4954-1-git-send-email-nicstange@gmail.com

While v1 (hopefully) fixed some issues in mpi_write_sgl() and
mpi_read_buffer() introduced by
commit 2d4d1eea540b ("lib/mpi: Add mpi sgl helpers") and by
commit 9cbe21d8f89d ("lib/mpi: only require buffers as big as needed for
the integer"),
I missed that there are some, including out-of-bounds buffer accesses,
in mpi_read_raw_from_sgl() as well.

Hence v2, which includes the original stuff from v1 plus my new fixes to
mpi_read_raw_from_sgl().

Applicable to linux-next-20160318.

Changes to v1:
- [1-8/14]
former [1-8/8], unchanged.

- [9-14/14]
Added in v2. Fixes to mpi_read_raw_from_sgl().

Nicolai Stange (14):
lib/mpi: mpi_write_sgl(): fix skipping of leading zero limbs
lib/mpi: mpi_write_sgl(): fix style issue with lzero decrement
lib/mpi: mpi_write_sgl(): purge redundant pointer arithmetic
lib/mpi: mpi_write_sgl(): fix out-of-bounds stack access
lib/mpi: mpi_write_sgl(): replace open coded endian conversion
lib/mpi: mpi_read_buffer(): optimize skipping of leading zero limbs
lib/mpi: mpi_read_buffer(): replace open coded endian conversion
lib/mpi: mpi_read_buffer(): fix buffer overflow
lib/mpi: mpi_read_raw_from_sgl(): replace len argument by nbytes
lib/mpi: mpi_read_raw_from_sgl(): don't include leading zero SGEs in
nbytes
lib/mpi: mpi_read_raw_from_sgl(): purge redundant clearing of nbits
lib/mpi: mpi_read_raw_from_sgl(): fix nbits calculation
lib/mpi: mpi_read_raw_from_sgl(): sanitize meaning of indices
lib/mpi: mpi_read_raw_from_sgl(): fix out-of-bounds buffer access

lib/mpi/mpicoder.c | 122 +++++++++++++++++++----------------------------------
1 file changed, 43 insertions(+), 79 deletions(-)

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2.7.3