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| author | Eric Biggers <ebiggers@google.com> | 2017-11-06 21:57:26 -0800 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@gmail.com> | 2017-11-13 12:12:44 +0100 |
| commit | b11270853fa3654f08d4a6a03b23ddb220512d8d (patch) | |
| tree | d9f851b984bda537edced56d652af69a5a79b04c /net/ceph/crypto.c | |
| parent | 7c084289795bc0f3b9ab315ac3c8d269dd4d0215 (diff) | |
| download | linux-stable-b11270853fa3654f08d4a6a03b23ddb220512d8d.tar.gz linux-stable-b11270853fa3654f08d4a6a03b23ddb220512d8d.tar.bz2 linux-stable-b11270853fa3654f08d4a6a03b23ddb220512d8d.zip | |
libceph: don't WARN() if user tries to add invalid key
The WARN_ON(!key->len) in set_secret() in net/ceph/crypto.c is hit if a
user tries to add a key of type "ceph" with an invalid payload as
follows (assuming CONFIG_CEPH_LIB=y):
echo -e -n '\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00' \
| keyctl padd ceph desc @s
This can be hit by fuzzers. As this is merely bad input and not a
kernel bug, replace the WARN_ON() with return -EINVAL.
Fixes: 7af3ea189a9a ("libceph: stop allocating a new cipher on every crypto request")
Cc: <stable@vger.kernel.org> # v4.10+
Signed-off-by: Eric Biggers <ebiggers@google.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'net/ceph/crypto.c')
| -rw-r--r-- | net/ceph/crypto.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/net/ceph/crypto.c b/net/ceph/crypto.c index 489610ac1cdd..bf9d079cbafd 100644 --- a/net/ceph/crypto.c +++ b/net/ceph/crypto.c @@ -37,7 +37,9 @@ static int set_secret(struct ceph_crypto_key *key, void *buf) return -ENOTSUPP; } - WARN_ON(!key->len); + if (!key->len) + return -EINVAL; + key->key = kmemdup(buf, key->len, GFP_NOIO); if (!key->key) { ret = -ENOMEM; |