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| author | Dmitry Kasatkin <dmitry.kasatkin@intel.com> | 2012-01-26 19:13:24 +0200 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2012-02-02 00:24:04 +1100 |
| commit | 86f8bedc9e1a8ddb4f1d9ff1f0c1229cc0797d6d (patch) | |
| tree | a0b67fa9e778cba871b8135cf6976066d11af83b /lib/digsig.c | |
| parent | 43b2c0aeaab2237996a72f9b9d7952ba82d56913 (diff) | |
| download | lwn-86f8bedc9e1a8ddb4f1d9ff1f0c1229cc0797d6d.tar.gz lwn-86f8bedc9e1a8ddb4f1d9ff1f0c1229cc0797d6d.zip | |
lib/digsig: checks for NULL return value
mpi_read_from_buffer() return value must not be NULL.
Signed-off-by: Dmitry Kasatkin <dmitry.kasatkin@intel.com>
Reviewed-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'lib/digsig.c')
| -rw-r--r-- | lib/digsig.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/lib/digsig.c b/lib/digsig.c index b67e82c024b3..286d558033e2 100644 --- a/lib/digsig.c +++ b/lib/digsig.c @@ -109,9 +109,13 @@ static int digsig_verify_rsa(struct key *key, datap = pkh->mpi; endp = ukp->data + ukp->datalen; + err = -ENOMEM; + for (i = 0; i < pkh->nmpi; i++) { unsigned int remaining = endp - datap; pkey[i] = mpi_read_from_buffer(datap, &remaining); + if (!pkey[i]) + goto err; datap += remaining; } @@ -168,8 +172,8 @@ err: mpi_free(res); kfree(out1); kfree(out2); - mpi_free(pkey[0]); - mpi_free(pkey[1]); + while (--i >= 0) + mpi_free(pkey[i]); err1: up_read(&key->sem); |