linux-stable/lib/xz
Lasse Collin 0b1a4d0ff9 lib/xz: Validate the value before assigning it to an enum variable
[ Upstream commit 4f8d7abaa4 ]

This might matter, for example, if the underlying type of enum xz_check
was a signed char. In such a case the validation wouldn't have caught an
unsupported header. I don't know if this problem can occur in the kernel
on any arch but it's still good to fix it because some people might copy
the XZ code to their own projects from Linux instead of the upstream
XZ Embedded repository.

This change may increase the code size by a few bytes. An alternative
would have been to use an unsigned int instead of enum xz_check but
using an enumeration looks cleaner.

Link: https://lore.kernel.org/r/20211010213145.17462-3-xiang@kernel.org
Signed-off-by: Lasse Collin <lasse.collin@tukaani.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2021-11-18 19:16:17 +01:00
..
Kconfig
Makefile
xz_crc32.c
xz_dec_bcj.c lib/decompressors: fix spelling mistakes 2021-07-01 11:06:05 -07:00
xz_dec_lzma2.c lib/xz: Avoid overlapping memcpy() with invalid input with in-place decompression 2021-11-18 19:16:17 +01:00
xz_dec_stream.c lib/xz: Validate the value before assigning it to an enum variable 2021-11-18 19:16:17 +01:00
xz_dec_syms.c
xz_dec_test.c
xz_lzma2.h
xz_private.h
xz_stream.h