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| author | Mark Johnston <markj@FreeBSD.org> | 2021-05-11 21:36:12 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2021-05-11 21:36:12 +0000 |
| commit | 1a04f0156c4e6abfc01d5841341a94179f317f31 (patch) | |
| tree | 89d3ba93038f2c103d195865dd354c2a856fcb49 /sys/opencrypto/cryptodev.c | |
| parent | b8f113cab91f288e5d5e29d21184d1601b87cfdd (diff) | |
| download | src-1a04f0156c4e6abfc01d5841341a94179f317f31.tar.gz src-1a04f0156c4e6abfc01d5841341a94179f317f31.zip | |
cryptodev: Fix some input validation bugs
- When we do not have a separate IV, make sure that the IV length
specified by the session is not larger than the payload size.
- Disallow AEAD requests without a separate IV. crp_sanity() asserts
that CRYPTO_F_IV_SEPARATE is set for AEAD requests, and some (but not
all) drivers require it.
- Return EINVAL for AEAD requests if an IV is specified but the
transform does not expect one.
Reported by: syzbot+c9e8f6ff5cb7fa6a1250@syzkaller.appspotmail.com
Reported by: syzbot+007341439ae295cee74f@syzkaller.appspotmail.com
Reported by: syzbot+46e0cc42a428b3b0a40d@syzkaller.appspotmail.com
Reported by: syzbot+2c4d670173b8bdb947df@syzkaller.appspotmail.com
Reported by: syzbot+220faa5eeb4d47b23877@syzkaller.appspotmail.com
Reported by: syzbot+e83434b40f05843722f7@syzkaller.appspotmail.com
Reviewed by: jhb
MFC after: 3 days
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D30154
Diffstat (limited to 'sys/opencrypto/cryptodev.c')
| -rw-r--r-- | sys/opencrypto/cryptodev.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/sys/opencrypto/cryptodev.c b/sys/opencrypto/cryptodev.c index f102b59b82ac..d179dd6348e5 100644 --- a/sys/opencrypto/cryptodev.c +++ b/sys/opencrypto/cryptodev.c @@ -878,6 +878,11 @@ cryptodev_op(struct csession *cse, const struct crypt_op *cop) } crp->crp_flags |= CRYPTO_F_IV_SEPARATE; } else if (cse->ivsize != 0) { + if (crp->crp_payload_length < cse->ivsize) { + SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); + error = EINVAL; + goto bail; + } crp->crp_iv_start = 0; crp->crp_payload_start += cse->ivsize; crp->crp_payload_length -= cse->ivsize; @@ -1058,6 +1063,11 @@ cryptodev_aead(struct csession *cse, struct crypt_aead *caead) cse->ivsize == AES_XTS_IV_LEN) caead->ivlen = AES_XTS_IV_LEN; + if (cse->ivsize == 0) { + SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); + error = EINVAL; + goto bail; + } if (caead->ivlen != cse->ivsize) { error = EINVAL; SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); @@ -1071,10 +1081,9 @@ cryptodev_aead(struct csession *cse, struct crypt_aead *caead) } crp->crp_flags |= CRYPTO_F_IV_SEPARATE; } else { - crp->crp_iv_start = crp->crp_payload_start; - crp->crp_payload_start += cse->ivsize; - crp->crp_payload_length -= cse->ivsize; - dst += cse->ivsize; + error = EINVAL; + SDT_PROBE1(opencrypto, dev, ioctl, error, __LINE__); + goto bail; } if (crp->crp_op & CRYPTO_OP_VERIFY_DIGEST) { |