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Miller" , Anand Moon , Bartlomiej Zolnierkiewicz , Marek Szyprowski , linux-crypto@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org Message-id: <77384548-9870-40b8-46fc-4bd62747efd6@partner.samsung.com> Date: Wed, 07 Feb 2018 16:52:09 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 MIME-version: 1.0 Content-type: text/plain; charset="utf-8" Content-language: en-US Content-transfer-encoding: 7bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrNKsWRmVeSWpSXmKPExsWy7djP87qrFaqjDO6+UrHYOGM9q8Wc8y0s Ft2vZCzOn9/AbnH/3k8mi8u75rBZzDi/j8li3cZb7BZrj9xlt/j/q5nZgctjy8qbTB47Z91l 99h2QNVj06pONo9/C6ewePRtWcXo8XmTXAB7FJdNSmpOZllqkb5dAldG449ZTAXzJCreTnzI 2sDYJ9LFyMkhIWAice3vFEYIW0ziwr31bF2MXBxCAksZJV73bWaHcD4zStxt/s0K03Fy4jdG iMQyRolV/88zQTjPGCX273jHBlLFJmAu8Wj7GSYQW1jATWLpnYdgO0QEdCRWvlzMCtLALPCU SeL9gYtgCV6gojdLXjGD2CwCqhLre9vZQWxRgQiJhVOfQtUISvyYfI8FxGYW0JR48WUSlC0u 0dx6E8qWl9i85i0zyAIJgftsEhOvXGOGuNtF4uS0zSwQtrDEq+Nb2CFsGYnOjoNMEA39jBLL b5xih3CmMEocn3aVCaLKWuLw8YusECv4JCZtmw40lQMozivR0SYEUeIh8eHEd6hljhKfLkNc JyQQK9G1/hPTBEa5WUiemIXkiVlInpiF5IkFjCyrGEVSS4tz01OLTfWKE3OLS/PS9ZLzczcx ApPQ6X/Hv+5gXHrM6hCjAAejEg+vwYbKKCHWxLLiytxDjBIczEoivO7s1VFCvCmJlVWpRfnx RaU5qcWHGKU5WJTEeW2j2iKFBNITS1KzU1MLUotgskwcnFINjPqyyuueLgmRLp7x95XL58WN syemnV+S9lbsU/KfqTxz97c46ZxcNYWreMYUi81Htbgdt+75H8R14lPI/+4Cz10cWvwfRLy2 ltTW8zPNuK8vJP3PSFG0O3bOa6tJHqu6GP7ITM2oLd77pW1K5NyXjL69vdoaCnPjxTKZDFvv Wt6T4wtc8vrqKiWW4oxEQy3mouJEALSFiYg+AwAA X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFvrILMWRmVeSWpSXmKPExsVy+t/xa7qrFaqjDDqaWSw2zljPajHnfAuL RfcrGYvz5zewW9y/95PJ4vKuOWwWM87vY7JYt/EWu8XaI3fZLf7/amZ24PLYsvImk8fOWXfZ PbYdUPXYtKqTzePfwiksHn1bVjF6fN4kF8AexWWTkpqTWZZapG+XwJXR+GMWU8E8iYq3Ex+y NjD2iXQxcnJICJhInJz4jRHCFpO4cG89WxcjF4eQwBJGiWkfp0E5zxglTj86wgpSxSZgLvFo +xkmEFtYwE1i6Z2HYN0iAjoSK18uZgVpYBZ4zCTRe+YkG0iCF6jozZJXzCA2i4CqxPrednYQ W1QgQqJz5XwWiBpBiR+T7wHZHEDN6hJTpuSChJkFxCWaW2+yQNjyEpvXvGWewMg/C0nHLISO WUg6ZiHpWMDIsopRJLW0ODc9t9hQrzgxt7g0L10vOT93EyMwIrYd+7l5B+OljcGHGAU4GJV4 eA02VEYJsSaWFVfmHmKU4GBWEuF1Z6+OEuJNSaysSi3Kjy8qzUktPsQozcGiJM573gCoWiA9 sSQ1OzW1ILUIJsvEwSnVwFi7iyXm99PoqCu8M588e+t7Qds1MOzRs70/jAyD7i2yjzQO1P63 Y+3U1lOc6k9O5/2OXzbp3Zy1zO9sjn++8X/ri5bztmn2bzh3lGfPnfHIVWH5nzenWv0VW/PY KzZFrhO395skukzTX2P7r8XbAh4Z1P7q/c5gvFbl1Kv/vtYCr/c1aeuv2mykxFKckWioxVxU nAgANehB8YQCAAA= X-CMS-MailID: 20180207155211eucas1p2d8d04871aaeb49efc30909d46e47e028 X-Msg-Generator: CA CMS-TYPE: 201P X-CMS-RootMailID: 20180207155211eucas1p2d8d04871aaeb49efc30909d46e47e028 X-RootMTR: 20180207155211eucas1p2d8d04871aaeb49efc30909d46e47e028 References: Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP In AES-ECB mode crypt is done with key only, so any use of IV can cause kernel Oops. Use IV only in AES-CBC and AES-CTR. Signed-off-by: Kamil Konieczny Reported-by: Anand Moon Reviewed-by: Krzysztof Kozlowski Tested-by: Anand Moon Cc: stable@vger.kernel.org # can be applied after commit 8f9702aad138 --- version 3: Change commit message: drop 'Fixes: 8f9702aad138' as the error was introduced earlier. version 2: Change commit message. Tested on Odroid XU4/HC1, kernel 4.15 with following command: fallocate -l 128MiB /tmp/test.bin dd if=/dev/urandom of=/tmp/testkey.key bs=128 count=1 sync cryptsetup luksFormat --debug -q -d /tmp/testkey.key \ --cipher aes-cbc-essiv:sha256 -h sha256 -s 128 /tmp/test.bin The original report by Anand Moon: https://www.spinics.net/lists/linux-crypto/msg31180.html Oops reproduced with cryptsetup 2.0.0, kernel 4.15, in .config in crypto API ECB support was turned off, and s5p-sss AES driver on. cryptsetup is using aes-ecb and has req->info in aes_ctx set to 0x10, which caused Oops: [ 2078.683779] Internal error: Oops: 17 [#1] PREEMPT SMP ARM [ 2078.689148] Modules linked in: algif_skcipher af_alg sd_mod sg evdev uas usb_storage scsi_mod gpio_keys fbtft(C) spidev spi_s3c64xx ipv6 [ 2078.701377] CPU: 1 PID: 15 Comm: ksoftirqd/1 Tainted: G C 4.15.0-rc9-xu4krck #1 [ 2078.709861] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) [ 2078.715932] PC is at memcpy+0x80/0x330 [ 2078.719652] LR is at s5p_tasklet_cb+0x19c/0x328 drivers/crypto/s5p-sss.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/drivers/crypto/s5p-sss.c b/drivers/crypto/s5p-sss.c index 142c6020cec7..5c0496d1ed41 100644 --- a/drivers/crypto/s5p-sss.c +++ b/drivers/crypto/s5p-sss.c @@ -1926,15 +1926,21 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) uint32_t aes_control; unsigned long flags; int err; + u8 *iv; aes_control = SSS_AES_KEY_CHANGE_MODE; if (mode & FLAGS_AES_DECRYPT) aes_control |= SSS_AES_MODE_DECRYPT; - if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) + if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CBC) { aes_control |= SSS_AES_CHAIN_MODE_CBC; - else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) + iv = req->info; + } else if ((mode & FLAGS_AES_MODE_MASK) == FLAGS_AES_CTR) { aes_control |= SSS_AES_CHAIN_MODE_CTR; + iv = req->info; + } else { + iv = NULL; /* AES_ECB */ + } if (dev->ctx->keylen == AES_KEYSIZE_192) aes_control |= SSS_AES_KEY_SIZE_192; @@ -1965,7 +1971,7 @@ static void s5p_aes_crypt_start(struct s5p_aes_dev *dev, unsigned long mode) goto outdata_error; SSS_AES_WRITE(dev, AES_CONTROL, aes_control); - s5p_set_aes(dev, dev->ctx->aes_key, req->info, dev->ctx->keylen); + s5p_set_aes(dev, dev->ctx->aes_key, iv, dev->ctx->keylen); s5p_set_dma_indata(dev, dev->sg_src); s5p_set_dma_outdata(dev, dev->sg_dst);