Re: [PATCH] crypto: s5p-sss.c: Fix kernel Oops in AES-ECB mode
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From: Krzysztof Kozlowski <krzk@kernel.org>
Date: 2018-02-06 12:11:45
Also in:
linux-samsung-soc, lkml
On Mon, Feb 5, 2018 at 6:40 PM, Kamil Konieczny [off-list ref] wrote:
In AES-ECB mode crypt is done with key only, so any use of IV can cause kernel Oops, as reported by Anand Moon. Fixed it by using IV only in AES-CBC and AES-CTR. Signed-off-by: Kamil Konieczny <redacted> Reported-by: Anand Moon <redacted> --- 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(-)
Fixes and cc-stable? Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org> Best regards, Krzysztof