From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8E7DB3148CD; Wed, 3 Dec 2025 16:48:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764780500; cv=none; b=HQoWdmNUODCzFERpYDDIGNzVDXynKz1tlKvqBy6YgMJKNvVFR/sqibnsFjQPM+zAhpIhjb3CtThOeSBVJ/5vmg7Dda0M9UjBQtC/2F5up7egHNigVfinVUpGUtwnGiSPRbIVOS3WCcSMphoECZRay7iG+wNNiSUjth4j0y/FMTM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764780500; c=relaxed/simple; bh=jCZ1nwn+SEayR32dmpb8s+RvFitztN7wEJtyxAiD+WI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=sCY1/KnEG/DTJBumUU7x7ythVqXcSn9N1l0RwqUVvP3v24JWF0JigVldmoF/JgMBwWEeuQ5WTfdkxNTWgxO6f6dDU2v9nVkUpuLQLF0gr4IYYsi+OsOuHF1HvgsoW3VXRlCBVG8C/dTDhxDImhC+Zs9rHBW3ypArSXpaj2v1SoM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=CG5owtj1; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="CG5owtj1" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12804C4CEF5; Wed, 3 Dec 2025 16:48:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1764780500; bh=jCZ1nwn+SEayR32dmpb8s+RvFitztN7wEJtyxAiD+WI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=CG5owtj1HxT6k4LXZC3hYtKq/4TlzvT7dXisUfgI0mPwRo1Qx6KnNFJrd87o/VeAK hdYQuxG0RG700Ap/AoS2yBIVly0yd483A7El83RlKUUfmZfnVKM8LMTbLccZN5zMWs Kvz8AEMHmEo+Y0Fwi1eB+KipoMAGWeKqkv+ptLz8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Igor Pylypiv , Terrence Adams , Jack Wang , "Martin K. Petersen" , Nazar Kalashnikov Subject: [PATCH 6.1 566/568] scsi: pm80xx: Set phy->enable_completion only when we Date: Wed, 3 Dec 2025 16:29:28 +0100 Message-ID: <20251203152501.479482878@linuxfoundation.org> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20251203152440.645416925@linuxfoundation.org> References: <20251203152440.645416925@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Igor Pylypiv [ Upstream commit e4f949ef1516c0d74745ee54a0f4882c1f6c7aea ] pm8001_phy_control() populates the enable_completion pointer with a stack address, sends a PHY_LINK_RESET / PHY_HARD_RESET, waits 300 ms, and returns. The problem arises when a phy control response comes late. After 300 ms the pm8001_phy_control() function returns and the passed enable_completion stack address is no longer valid. Late phy control response invokes complete() on a dangling enable_completion pointer which leads to a kernel crash. Signed-off-by: Igor Pylypiv Signed-off-by: Terrence Adams Link: https://lore.kernel.org/r/20240627155924.2361370-2-tadamsjr@google.com Acked-by: Jack Wang Signed-off-by: Martin K. Petersen Signed-off-by: Nazar Kalashnikov Signed-off-by: Greg Kroah-Hartman --- Backport fix for CVE-2024-47666 drivers/scsi/pm8001/pm8001_sas.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -168,7 +168,6 @@ int pm8001_phy_control(struct asd_sas_ph unsigned long flags; pm8001_ha = sas_phy->ha->lldd_ha; phy = &pm8001_ha->phy[phy_id]; - pm8001_ha->phy[phy_id].enable_completion = &completion; switch (func) { case PHY_FUNC_SET_LINK_RATE: rates = funcdata; @@ -181,6 +180,7 @@ int pm8001_phy_control(struct asd_sas_ph rates->maximum_linkrate; } if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -189,6 +189,7 @@ int pm8001_phy_control(struct asd_sas_ph break; case PHY_FUNC_HARD_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); } @@ -197,6 +198,7 @@ int pm8001_phy_control(struct asd_sas_ph break; case PHY_FUNC_LINK_RESET: if (pm8001_ha->phy[phy_id].phy_state == PHY_LINK_DISABLE) { + pm8001_ha->phy[phy_id].enable_completion = &completion; PM8001_CHIP_DISP->phy_start_req(pm8001_ha, phy_id); wait_for_completion(&completion); }