From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Google-Smtp-Source: AH8x224w1kCPrLgxhMDH+0QzIUr33IkIsTYCLLbNu+PiUbbnZ9cp/FJYmAcXtCs7Cbp9rOKRFrur ARC-Seal: i=1; a=rsa-sha256; t=1519411682; cv=none; d=google.com; s=arc-20160816; b=K7bJSJZAf1p35Y9yvLL9sjxGikotfhRkDSwNVLtCgIo2trR0cLopvU4r9q/TUlzt97 w1ULf/DLHJ/iFc2yHWvqPd6af0ZJAP30UxPegrTR/KR5D1xJgAgUrfXZshfJzywBBvSF lt6J+Pydp9PybIMqpuwvs42lLOkYrUhZoOZ2vl3WH7n3UdxO4zmQPXo0ho+uA1TMqiXT vdmiQIutS7EwUVyiHHjrAmBFi36zgMmyGZXMekq8TKqMEkAqXZfQqswhb2hIcsxd78Bm +ExJUxt0rATGox3gxIv41SdIyg8VF5HeCuSnh47/kdgV/afr6Ewmf0s9UTJNIDv7K3sh CSkQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=mime-version:user-agent:references:in-reply-to:message-id:date :subject:cc:to:from:arc-authentication-results; bh=6bL5JSIRE5YCb9oLw018BycvSeOMECbQOqezEjxd7Ok=; b=jmEJjEqRSmrrR9dpVZL10/NN+m73qNfT2Fu+Ay4UK1uREt2F0a/NHKJBKPlXwgHCM2 FvvdVUu9TjD3QijjClzMoIIW8u8cPRPfUtYWT0cVU0ZhuvpInaRboBUrKT1V1EUNLEkW /m4L1fAu46mwEnIJ0LnXlx+Nb+VMWzvKIuBHSPFhkjjwUGr0mSv3yRmcr/qon2GBF2eh QbCagpd+f/dvj76zlBfMl4+USMFIfSjDg1/HzewJ86v1w1GyuAXdpok63LTSZjxhLnkq 3ZXR9/qJcSmuyZzQDfyLXjg7aF8r7HAwMFIc0WAC7u6kXa2Y5efgGh6kl3Ah8Kfk3fbF X0Mw== ARC-Authentication-Results: i=1; mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org Authentication-Results: mx.google.com; spf=softfail (google.com: domain of transitioning gregkh@linuxfoundation.org does not designate 90.92.71.90 as permitted sender) smtp.mailfrom=gregkh@linuxfoundation.org From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Christophe Leroy , Herbert Xu Subject: [PATCH 4.9 090/145] crypto: talitos - fix Kernel Oops on hashing an empty file Date: Fri, 23 Feb 2018 19:26:36 +0100 Message-Id: <20180223170736.426421571@linuxfoundation.org> X-Mailer: git-send-email 2.16.2 In-Reply-To: <20180223170724.669759283@linuxfoundation.org> References: <20180223170724.669759283@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-LABELS: =?utf-8?b?IlxcU2VudCI=?= X-GMAIL-THRID: =?utf-8?q?1593218624011124864?= X-GMAIL-MSGID: =?utf-8?q?1593218624011124864?= X-Mailing-List: linux-kernel@vger.kernel.org List-ID: 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ From: LEROY Christophe commit 87a81dce53b1ea61acaeefa5191a0376a2d1d721 upstream. Performing the hash of an empty file leads to a kernel Oops [ 44.504600] Unable to handle kernel paging request for data at address 0x0000000c [ 44.512819] Faulting instruction address: 0xc02d2be8 [ 44.524088] Oops: Kernel access of bad area, sig: 11 [#1] [ 44.529171] BE PREEMPT CMPC885 [ 44.532232] CPU: 0 PID: 491 Comm: md5sum Not tainted 4.15.0-rc8-00211-g3a968610b6ea #81 [ 44.540814] NIP: c02d2be8 LR: c02d2984 CTR: 00000000 [ 44.545812] REGS: c6813c90 TRAP: 0300 Not tainted (4.15.0-rc8-00211-g3a968610b6ea) [ 44.554223] MSR: 00009032 CR: 48222822 XER: 20000000 [ 44.560855] DAR: 0000000c DSISR: c0000000 [ 44.560855] GPR00: c02d28fc c6813d40 c6828000 c646fa40 00000001 00000001 00000001 00000000 [ 44.560855] GPR08: 0000004c 00000000 c000bfcc 00000000 28222822 100280d4 00000000 10020008 [ 44.560855] GPR16: 00000000 00000020 00000000 00000000 10024008 00000000 c646f9f0 c6179a10 [ 44.560855] GPR24: 00000000 00000001 c62f0018 c6179a10 00000000 c6367a30 c62f0000 c646f9c0 [ 44.598542] NIP [c02d2be8] ahash_process_req+0x448/0x700 [ 44.603751] LR [c02d2984] ahash_process_req+0x1e4/0x700 [ 44.608868] Call Trace: [ 44.611329] [c6813d40] [c02d28fc] ahash_process_req+0x15c/0x700 (unreliable) [ 44.618302] [c6813d90] [c02060c4] hash_recvmsg+0x11c/0x210 [ 44.623716] [c6813db0] [c0331354] ___sys_recvmsg+0x98/0x138 [ 44.629226] [c6813eb0] [c03332c0] __sys_recvmsg+0x40/0x84 [ 44.634562] [c6813f10] [c03336c0] SyS_socketcall+0xb8/0x1d4 [ 44.640073] [c6813f40] [c000d1ac] ret_from_syscall+0x0/0x38 [ 44.645530] Instruction dump: [ 44.648465] 38c00001 7f63db78 4e800421 7c791b78 54690ffe 0f090000 80ff0190 2f870000 [ 44.656122] 40befe50 2f990001 409e0210 813f01bc <8129000c> b39e003a 7d29c214 913e003c This patch fixes that Oops by checking if src is NULL. Fixes: 6a1e8d14156d4 ("crypto: talitos - making mapping helpers more generic") Cc: Signed-off-by: Christophe Leroy Signed-off-by: Herbert Xu Signed-off-by: Greg Kroah-Hartman --- drivers/crypto/talitos.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/drivers/crypto/talitos.c +++ b/drivers/crypto/talitos.c @@ -1124,6 +1124,11 @@ int talitos_sg_map(struct device *dev, s struct talitos_private *priv = dev_get_drvdata(dev); bool is_sec1 = has_ftr_sec1(priv); + if (!src) { + *ptr = zero_entry; + return 1; + } + to_talitos_ptr_len(ptr, len, is_sec1); to_talitos_ptr_ext_set(ptr, 0, is_sec1);