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libpayload: cbfs: Require input size and output size for cbfs_decompress

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Currently, cbfs_decompress() calls ulzma() and ulz4f() for LZMA/LZ4
decompression. These two functions don't accept input/output size as
parameters. We can make cbfs_decompress more robust by calling ulzman()
and ulz4fn() instead. This could prevent us from overflowing destination
buffer.

BUG=none
BRANCH=none
TEST=boot into kernel on Kukui with COMPRESSED_PAYLOAD_LZMA /
     COMPRESSED_PAYLOAD_LZ4.

Change-Id: Ibe617825bd000ed618791d8e3c5f65bbbd5f7e33
Signed-off-by: You-Cheng Syu <youcheng@google.com>
Reviewed-on: https://review.coreboot.org/c/31606
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>
Reviewed-by: Daisuke Nojiri <dnojiri@chromium.org>
This commit is contained in:
You-Cheng Syu
2019-02-27 15:29:15 +08:00
committed by Patrick Georgi
parent 08087a3e8a
commit 5ec1d24974
3 changed files with 17 additions and 10 deletions
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5
payloads/libpayload/include/cbfs_core.h
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@ -253,8 +253,9 @@ struct cbfs_media {
void *cbfs_get_file_content(struct cbfs_media *media, const char *name,
int type, size_t *sz);
/* returns decompressed size on success, 0 on failure */
int cbfs_decompress(int algo, void *src, void *dst, int len);
/* Returns decompressed size on success, 0 on failure. */
size_t cbfs_decompress(int algo, const void *src, size_t srcn, void *dst,
size_t dstn);
/* returns a pointer to CBFS master header, or CBFS_HEADER_INVALID_ADDRESS
* on failure */