diff options
| author | Paul Davey <[email protected]> | 2018-11-05 18:09:29 +1300 |
|---|---|---|
| committer | Heiko Schocher <[email protected]> | 2018-11-07 08:49:27 +0100 |
| commit | e4aa10ba5770fc391bf8a4b00c131353901704e7 (patch) | |
| tree | 10771073ad0c27e127f55072065db6390e3dd5fc | |
| parent | dd610e616cceda16a81dfa6f9a134877f783548c (diff) | |
fs: ubifs: Fix UBIFS decompression on 64 bit
Add local size_t variable to crypto_comp_decompress as intermediate
storage for destination length to avoid memory corruption and incorrect
results on 64 bit targets.
This is what linux does for the various lz compression implementations.
Signed-off-by: Paul Davey <[email protected]>
Cc: Heiko Schocher <[email protected]>
Tested-by: Heiko Schocher <[email protected]>
| -rw-r--r-- | fs/ubifs/ubifs.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/fs/ubifs/ubifs.c b/fs/ubifs/ubifs.c index 47fa41ad1dd..d5101d3c459 100644 --- a/fs/ubifs/ubifs.c +++ b/fs/ubifs/ubifs.c @@ -125,6 +125,7 @@ crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm, { struct ubifs_compressor *compr = ubifs_compressors[tfm->compressor]; int err; + size_t tmp_len = *dlen; if (compr->compr_type == UBIFS_COMPR_NONE) { memcpy(dst, src, slen); @@ -132,11 +133,12 @@ crypto_comp_decompress(const struct ubifs_info *c, struct crypto_comp *tfm, return 0; } - err = compr->decompress(src, slen, dst, (size_t *)dlen); + err = compr->decompress(src, slen, dst, &tmp_len); if (err) ubifs_err(c, "cannot decompress %d bytes, compressor %s, " "error %d", slen, compr->name, err); + *dlen = tmp_len; return err; return 0; |