From nobody Sun Feb 8 23:25:54 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 87108EB64DB for ; Sat, 17 Jun 2023 02:30:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232709AbjFQC36 (ORCPT ); Fri, 16 Jun 2023 22:29:58 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51942 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231912AbjFQC3z (ORCPT ); Fri, 16 Jun 2023 22:29:55 -0400 Received: from mail-pf1-x42a.google.com (mail-pf1-x42a.google.com [IPv6:2607:f8b0:4864:20::42a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 33D2B3C04 for ; Fri, 16 Jun 2023 19:29:54 -0700 (PDT) Received: by mail-pf1-x42a.google.com with SMTP id d2e1a72fcca58-666ecf9a081so539225b3a.2 for ; Fri, 16 Jun 2023 19:29:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686968993; x=1689560993; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=DQ+LSaRX9M/Hgg+k8Zz1wqM97LbrcQmgbhN3eAMVaNk=; b=NDVUmvR2CHhAzJY3YEHl/hl/a8GIpqSr10tEHhXgD/y+TTOPsVbgwaeARffIbgIFCG E/gA5Ws0wfQgujed6Q5wdZzoDYnqbMEg7aLj6RS+VSeV3Vse8r4tXz+u+1wHPyJnmd+J 0cNkOq/h4iC15X2jLcrKUyS6Omr2BTJGToGKk= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686968993; x=1689560993; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=DQ+LSaRX9M/Hgg+k8Zz1wqM97LbrcQmgbhN3eAMVaNk=; b=OXLOoehPlkMgPKQsqN5OOP8EtZjaKRZYuZ8TbVoxVXde3iVXt20vTTn9TOXxkTg9uA /bL8BM1pHSDC8yxKyb7B0kDvz+nP4E5othrYjAJR5tuhxz73N7ldEcD4BnFye1HOBPRr YJ8IpEyOANTtVlA8PKByM6JBziwvcyHZOR9fGk2dJ7FaixVN2CEiidSzx2ct8+2ws7hG TAHcI4hsh3v05BFOHrTBA9tyFZ3MPWoDW3xL8sz7uEOlNFos4IgoNFBI5t05OJexCair DKpB1u5zjF83wPbOcBFT7Cjv1wPpvrMHrizo0t72bbe5R/tpa4QTO+JHNKGeSZ7ROahq oASQ== X-Gm-Message-State: AC+VfDw1ksxnXjgSTdIsdhrUbaghkEYZtzVdvWB1w1c1VTLgVn+I6pyH c1AJU2QrDqrF7KqFhJEjpsbCJw== X-Google-Smtp-Source: ACHHUZ7UMGMl8kimw/N1IsGg9o6gIwTW9/ddFvWZ9PnAtMRaWE3bQ1P9JGDdQJjPn5He/qJ1vvlJJA== X-Received: by 2002:a05:6a00:2d13:b0:666:acbb:abd2 with SMTP id fa19-20020a056a002d1300b00666acbbabd2mr5081848pfb.18.1686968993398; Fri, 16 Jun 2023 19:29:53 -0700 (PDT) Received: from ubuntu-22.localdomain ([192.19.222.250]) by smtp.gmail.com with ESMTPSA id b2-20020aa78702000000b006668f004420sm3520239pfo.148.2023.06.16.19.29.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Jun 2023 19:29:52 -0700 (PDT) From: William Zhang To: Broadcom Kernel List , Linux MTD List Cc: f.fainelli@gmail.com, rafal@milecki.pl, kursad.oney@broadcom.com, joel.peshkin@broadcom.com, computersforpeace@gmail.com, anand.gore@broadcom.com, dregan@mail.com, kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, William Zhang , Florian Fainelli , Rob Herring , linux-kernel@vger.kernel.org, Vignesh Raghavendra , Miquel Raynal , Richard Weinberger , Boris Brezillon , Kamal Dasu Subject: [PATCH v2 1/4] mtd: rawnand: brcmnand: Fix ECC level field setting for v7.2 controller Date: Fri, 16 Jun 2023 19:29:17 -0700 Message-Id: <20230617022920.67173-2-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230617022920.67173-1-william.zhang@broadcom.com> References: <20230617022920.67173-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="0000000000009f320a05fe4a13ab" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --0000000000009f320a05fe4a13ab Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" v7.2 controller has different ECC level field size and shift in the acc control register than its predecessor and successor controller. It needs to be set specifically. Fixes: decba6d47869 ("mtd: brcmnand: Add v7.2 controller support") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli --- Changes in v2: - Use driver static data for ECC level shift drivers/mtd/nand/raw/brcmnand/brcmnand.c | 74 +++++++++++++----------- 1 file changed, 41 insertions(+), 33 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/ra= w/brcmnand/brcmnand.c index 2e9c2e2d9c9f..69709419516a 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -272,6 +272,7 @@ struct brcmnand_controller { const unsigned int *page_sizes; unsigned int page_size_shift; unsigned int max_oob; + u32 ecc_level_shift; u32 features; =20 /* for low-power standby/resume only */ @@ -596,6 +597,34 @@ enum { INTFC_CTLR_READY =3D BIT(31), }; =20 +/*********************************************************************** + * NAND ACC CONTROL bitfield + * + * Some bits have remained constant throughout hardware revision, while + * others have shifted around. + ***********************************************************************/ + +/* Constant for all versions (where supported) */ +enum { + /* See BRCMNAND_HAS_CACHE_MODE */ + ACC_CONTROL_CACHE_MODE =3D BIT(22), + + /* See BRCMNAND_HAS_PREFETCH */ + ACC_CONTROL_PREFETCH =3D BIT(23), + + ACC_CONTROL_PAGE_HIT =3D BIT(24), + ACC_CONTROL_WR_PREEMPT =3D BIT(25), + ACC_CONTROL_PARTIAL_PAGE =3D BIT(26), + ACC_CONTROL_RD_ERASED =3D BIT(27), + ACC_CONTROL_FAST_PGM_RDIN =3D BIT(28), + ACC_CONTROL_WR_ECC =3D BIT(30), + ACC_CONTROL_RD_ECC =3D BIT(31), + + ACC_CONTROL_ECC_SHIFT =3D 16, + /* Only for v7.2 */ + ACC_CONTROL_ECC_EXT_SHIFT =3D 13, +}; + static inline bool brcmnand_non_mmio_ops(struct brcmnand_controller *ctrl) { #if IS_ENABLED(CONFIG_MTD_NAND_BRCMNAND_BCMA) @@ -737,6 +766,12 @@ static int brcmnand_revision_init(struct brcmnand_cont= roller *ctrl) else if (of_property_read_bool(ctrl->dev->of_node, "brcm,nand-has-wp")) ctrl->features |=3D BRCMNAND_HAS_WP; =20 + /* v7.2 has different ecc level shift in the acc register */ + if (ctrl->nand_version =3D=3D 0x0702) + ctrl->ecc_level_shift =3D ACC_CONTROL_ECC_EXT_SHIFT; + else + ctrl->ecc_level_shift =3D ACC_CONTROL_ECC_SHIFT; + return 0; } =20 @@ -931,30 +966,6 @@ static inline int brcmnand_cmd_shift(struct brcmnand_c= ontroller *ctrl) return 0; } =20 -/*********************************************************************** - * NAND ACC CONTROL bitfield - * - * Some bits have remained constant throughout hardware revision, while - * others have shifted around. - ***********************************************************************/ - -/* Constant for all versions (where supported) */ -enum { - /* See BRCMNAND_HAS_CACHE_MODE */ - ACC_CONTROL_CACHE_MODE =3D BIT(22), - - /* See BRCMNAND_HAS_PREFETCH */ - ACC_CONTROL_PREFETCH =3D BIT(23), - - ACC_CONTROL_PAGE_HIT =3D BIT(24), - ACC_CONTROL_WR_PREEMPT =3D BIT(25), - ACC_CONTROL_PARTIAL_PAGE =3D BIT(26), - ACC_CONTROL_RD_ERASED =3D BIT(27), - ACC_CONTROL_FAST_PGM_RDIN =3D BIT(28), - ACC_CONTROL_WR_ECC =3D BIT(30), - ACC_CONTROL_RD_ECC =3D BIT(31), -}; - static inline u32 brcmnand_spare_area_mask(struct brcmnand_controller *ctr= l) { if (ctrl->nand_version =3D=3D 0x0702) @@ -967,18 +978,15 @@ static inline u32 brcmnand_spare_area_mask(struct brc= mnand_controller *ctrl) return GENMASK(4, 0); } =20 -#define NAND_ACC_CONTROL_ECC_SHIFT 16 -#define NAND_ACC_CONTROL_ECC_EXT_SHIFT 13 - static inline u32 brcmnand_ecc_level_mask(struct brcmnand_controller *ctrl) { u32 mask =3D (ctrl->nand_version >=3D 0x0600) ? 0x1f : 0x0f; =20 - mask <<=3D NAND_ACC_CONTROL_ECC_SHIFT; + mask <<=3D ACC_CONTROL_ECC_SHIFT; =20 /* v7.2 includes additional ECC levels */ - if (ctrl->nand_version >=3D 0x0702) - mask |=3D 0x7 << NAND_ACC_CONTROL_ECC_EXT_SHIFT; + if (ctrl->nand_version =3D=3D 0x0702) + mask |=3D 0x7 << ACC_CONTROL_ECC_EXT_SHIFT; =20 return mask; } @@ -992,8 +1000,8 @@ static void brcmnand_set_ecc_enabled(struct brcmnand_h= ost *host, int en) =20 if (en) { acc_control |=3D ecc_flags; /* enable RD/WR ECC */ - acc_control |=3D host->hwcfg.ecc_level - << NAND_ACC_CONTROL_ECC_SHIFT; + acc_control &=3D ~brcmnand_ecc_level_mask(ctrl); + acc_control |=3D host->hwcfg.ecc_level << ctrl->ecc_level_shift; } else { acc_control &=3D ~ecc_flags; /* disable RD/WR ECC */ acc_control &=3D ~brcmnand_ecc_level_mask(ctrl); @@ -2561,7 +2569,7 @@ static int brcmnand_set_cfg(struct brcmnand_host *hos= t, tmp &=3D ~brcmnand_ecc_level_mask(ctrl); tmp &=3D ~brcmnand_spare_area_mask(ctrl); if (ctrl->nand_version >=3D 0x0302) { - tmp |=3D cfg->ecc_level << NAND_ACC_CONTROL_ECC_SHIFT; + tmp |=3D cfg->ecc_level << ctrl->ecc_level_shift; tmp |=3D cfg->spare_area_size; } nand_writereg(ctrl, acc_control_offs, tmp); --=20 2.37.3 --0000000000009f320a05fe4a13ab Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME 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linux-kernel@vger.kernel.org, Vignesh Raghavendra , Richard Weinberger , Boris Brezillon , Kamal Dasu Subject: [PATCH v2 2/4] mtd: rawnand: brcmnand: Fix potential false time out warning Date: Fri, 16 Jun 2023 19:29:18 -0700 Message-Id: <20230617022920.67173-3-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230617022920.67173-1-william.zhang@broadcom.com> References: <20230617022920.67173-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000c305f205fe4a132b" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000c305f205fe4a132b Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" If system is busy during the command status polling function, the driver may not get the chance to poll the status register till the end of time out and return the premature status. Do a final check after time out happens to ensure reading the correct status. Fixes: 9d2ee0a60b8b ("mtd: nand: brcmnand: Check flash #WP pin status befor= e nand erase/program") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli --- Changes in v2: None drivers/mtd/nand/raw/brcmnand/brcmnand.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/ra= w/brcmnand/brcmnand.c index 69709419516a..37c2c7cfa00e 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1080,6 +1080,14 @@ static int bcmnand_ctrl_poll_status(struct brcmnand_= controller *ctrl, cpu_relax(); } while (time_after(limit, jiffies)); =20 + /* + * do a final check after time out in case CPU is busy and driver does + * not get the enough time to poll to avoid false alarm + */ + val =3D brcmnand_read_reg(ctrl, BRCMNAND_INTFC_STATUS); + if ((val & mask) =3D=3D expected_val) + return 0; + dev_warn(ctrl->dev, "timeout on status poll (expected %x got %x)\n", expected_val, val & mask); 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Fri, 16 Jun 2023 19:29:59 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=broadcom.com; s=google; t=1686968998; x=1689560998; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:from:to:cc:subject:date:message-id:reply-to; bh=vSxxaZtEjn5rV3bppsvJwGxV+2k2QNug6CJhlPL5TKM=; b=SK+XQt0cAX6bNd8iyDZgiDXHAV/n/iWXvnMjZ5/gYAnF7FGVkZ1XGK/YhgoDVxvsdX yavVwVTvcKUx4QtIULkDpJPjhgrjP9HaMLgDUkrlR73RQVW9h+8kJe+2UlmaKrhBsx2+ vD4GqsBSdZBlLxT6Z5iH1gUKRR+FSvJDjFzFM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1686968998; x=1689560998; h=mime-version:references:in-reply-to:message-id:date:subject:cc:to :from:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=vSxxaZtEjn5rV3bppsvJwGxV+2k2QNug6CJhlPL5TKM=; b=cmsO41482oYagdpEc+B6PvXpzdmL921lpabc1YHMA8ijZn6ulyA0mvn0mB9Opqv7Rp f60DDOkVOQee2ZA7gJJ0iNzXUj3TjfvlcLl0y9qiXYn0P5WhbehEFWOBu63Ar+hhjH5H NFrFoTzaGvmjkNPzMIkTmewhTPrRWpGbBVHTpG99hBb7vcCg+H3wKW1p31vwNr8WfO9d 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dregan@mail.com, kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, William Zhang , Florian Fainelli , Miquel Raynal , linux-kernel@vger.kernel.org, Vignesh Raghavendra , Richard Weinberger , Kamal Dasu Subject: [PATCH v2 3/4] mtd: rawnand: brcmnand: Fix crash during the panic_write Date: Fri, 16 Jun 2023 19:29:19 -0700 Message-Id: <20230617022920.67173-4-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230617022920.67173-1-william.zhang@broadcom.com> References: <20230617022920.67173-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="000000000000ebe82505fe4a1398" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --000000000000ebe82505fe4a1398 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" During the panic write path to execute another nand command, if there is a pending command, we should wait for the command instead of calling BUG_ON so we don't crash while crashing. Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB= NAND controller") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli Reviewed-by: Kursad Oney Reviewed-by: Kamal Dasu --- Changes in v2: None drivers/mtd/nand/raw/brcmnand/brcmnand.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/ra= w/brcmnand/brcmnand.c index 37c2c7cfa00e..ea03104692bf 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1608,7 +1608,17 @@ static void brcmnand_send_cmd(struct brcmnand_host *= host, int cmd) =20 dev_dbg(ctrl->dev, "send native cmd %d addr 0x%llx\n", cmd, cmd_addr); =20 - BUG_ON(ctrl->cmd_pending !=3D 0); + /* + * If we came here through _panic_write and there is a pending + * command, try to wait for it. 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ESMTPSA id b2-20020aa78702000000b006668f004420sm3520239pfo.148.2023.06.16.19.29.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 16 Jun 2023 19:29:59 -0700 (PDT) From: William Zhang To: Broadcom Kernel List , Linux MTD List Cc: f.fainelli@gmail.com, rafal@milecki.pl, kursad.oney@broadcom.com, joel.peshkin@broadcom.com, computersforpeace@gmail.com, anand.gore@broadcom.com, dregan@mail.com, kamal.dasu@broadcom.com, tomer.yacoby@broadcom.com, dan.beygelman@broadcom.com, William Zhang , Florian Fainelli , Miquel Raynal , linux-kernel@vger.kernel.org, Vignesh Raghavendra , Richard Weinberger , Kamal Dasu Subject: [PATCH v2 4/4] mtd: rawnand: brcmnand: Fix potential out-of-bounds access in oob write Date: Fri, 16 Jun 2023 19:29:20 -0700 Message-Id: <20230617022920.67173-5-william.zhang@broadcom.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230617022920.67173-1-william.zhang@broadcom.com> References: <20230617022920.67173-1-william.zhang@broadcom.com> MIME-Version: 1.0 Content-Type: multipart/signed; protocol="application/pkcs7-signature"; micalg=sha-256; boundary="00000000000010d3f505fe4a14c2" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org --00000000000010d3f505fe4a14c2 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" When the oob buffer length is not in multiple of words, the oob write function does out-of-bounds read on the oob source buffer at the last iteration. Fix that by always checking length limit on the oob buffer read and fill with 0xff when reaching the end of the buffer to the oob registers. Fixes: 27c5b17cd1b1 ("mtd: nand: add NAND driver "library" for Broadcom STB= NAND controller") Signed-off-by: William Zhang Reviewed-by: Florian Fainelli --- Changes in v2: - Handle the remaining unaligned oob data after the oob data write loop drivers/mtd/nand/raw/brcmnand/brcmnand.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/mtd/nand/raw/brcmnand/brcmnand.c b/drivers/mtd/nand/ra= w/brcmnand/brcmnand.c index ea03104692bf..82e8434856c9 100644 --- a/drivers/mtd/nand/raw/brcmnand/brcmnand.c +++ b/drivers/mtd/nand/raw/brcmnand/brcmnand.c @@ -1477,19 +1477,28 @@ static int write_oob_to_regs(struct brcmnand_contro= ller *ctrl, int i, const u8 *oob, int sas, int sector_1k) { int tbytes =3D sas << sector_1k; - int j; + int j, k =3D 0; + u32 last =3D 0xffffffff; + u8 *plast =3D (u8 *)&last; =20 /* Adjust OOB values for 1K sector size */ if (sector_1k && (i & 0x01)) tbytes =3D max(0, tbytes - (int)ctrl->max_oob); tbytes =3D min_t(int, tbytes, ctrl->max_oob); =20 - for (j =3D 0; j < tbytes; j +=3D 4) + for (j =3D 0; (j + 3) < tbytes; j +=3D 4) oob_reg_write(ctrl, j, (oob[j + 0] << 24) | (oob[j + 1] << 16) | (oob[j + 2] << 8) | (oob[j + 3] << 0)); + + while (j < tbytes) + plast[k++] =3D oob[j++]; + + if (tbytes & 0x3) + oob_reg_write(ctrl, (tbytes & ~0x3), cpu_to_be32(last)); + return tbytes; } =20 --=20 2.37.3 --00000000000010d3f505fe4a14c2 Content-Type: application/pkcs7-signature; name="smime.p7s" Content-Transfer-Encoding: base64 Content-Disposition: attachment; filename="smime.p7s" Content-Description: S/MIME Cryptographic Signature MIIQcAYJKoZIhvcNAQcCoIIQYTCCEF0CAQExDzANBglghkgBZQMEAgEFADALBgkqhkiG9w0BBwGg gg3HMIIFDTCCA/WgAwIBAgIQeEqpED+lv77edQixNJMdADANBgkqhkiG9w0BAQsFADBMMSAwHgYD VQQLExdHbG9iYWxTaWduIFJvb3QgQ0EgLSBSMzETMBEGA1UEChMKR2xvYmFsU2lnbjETMBEGA1UE AxMKR2xvYmFsU2lnbjAeFw0yMDA5MTYwMDAwMDBaFw0yODA5MTYwMDAwMDBaMFsxCzAJBgNVBAYT AkJFMRkwFwYDVQQKExBHbG9iYWxTaWduIG52LXNhMTEwLwYDVQQDEyhHbG9iYWxTaWduIEdDQyBS 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