From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 33D534E9C36; Thu, 17 Sep 2026 16:54:15 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789664056; cv=none; b=t5ELCcfYjeagfGcs4zpIUpdNOHYLw/m3d+KoDiRxJ3p+H/kYn1G6H2vT9KXtylgZJYzOzZe+Qgvgl+CRKoM+oIG4aOMkO0SU8F4ZRS02brONGOkw8Sy3zDqhUcRkL3qjlecaB5VyHO9iQGKQ8ihejoM8frzB0pzFyJcFMzsFaJw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789664056; c=relaxed/simple; bh=gEilLrmRitm83j4Uzbjg2drRXfPdtSHvU7y4LIaYKlQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=hZubQ5snsXQ/JDgWSHGKPzX7bcucaZE+jylVqEJAb0tpw5Hl0MDpa2NOFXGSlHVimhhaFBO0ONoSpU0+Q1IQrsS9roP98h7ppUVdh9Rv8U5oxuSnXCbR7Zp1I76FSR3Jyel3xyizB0+LClmKXgEPxpVdBBV2obn4uUlRad/FVpQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=1H/+qc7v; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="1H/+qc7v" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8BE5D1F000FF; Thu, 17 Sep 2026 16:54:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1789664055; bh=Lj0pWclodmdo1QUTdefePqLIQTE1xyoo92T0QQIaVYs=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=1H/+qc7v8FAsDzb10YxeuV6cq3k/12kR6T1poZUFTpemeBZlrESMJ3qoDVspopsJW oHDSCPFu45LOkAn0cMap2uz+TldK0Jxw9Yz4GIDHFgfNnbN2LeYYd/hEYu5zM9cLU3 qMa4s2YSSwquV1DnV8Lg8HH7dqxyClE+VpxY07uQ= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, ikaros , "Rafael J. Wysocki" , Sasha Levin Subject: [PATCH 6.18 0243/1250] ACPICA: Add package limit checks in parser functions Date: Thu, 17 Sep 2026 16:00:38 +0100 Message-ID: <20260917151558.731250833@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260917151551.901433442@linuxfoundation.org> References: <20260917151551.901433442@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: ikaros [ Upstream commit d27d48a528e437aed690f977e69a6fe73fe82ab5 ] Add package limit checks in parser functions to prevent out-of-bounds access. Link: https://github.com/acpica/acpica/commit/b31b45af2122 Signed-off-by: ikaros Signed-off-by: Rafael J. Wysocki Link: https://patch.msgid.link/3212937.CbtlEUcBR6@rafael.j.wysocki Signed-off-by: Sasha Levin --- drivers/acpi/acpica/nsxfname.c | 4 ++++ drivers/acpi/acpica/psargs.c | 4 ++++ drivers/acpi/acpica/psloop.c | 25 +++++++++++++++++++++++++ drivers/acpi/acpica/psparse.c | 8 ++++++++ 4 files changed, 41 insertions(+) diff --git a/drivers/acpi/acpica/nsxfname.c b/drivers/acpi/acpica/nsxfname.c index 1db831545ec8c..821fb4930e9d8 100644 --- a/drivers/acpi/acpica/nsxfname.c +++ b/drivers/acpi/acpica/nsxfname.c @@ -512,6 +512,10 @@ acpi_status acpi_install_method(u8 *buffer) parser_state.aml += acpi_ps_get_opcode_size(opcode); parser_state.pkg_end = acpi_ps_get_next_package_end(&parser_state); + if ((parser_state.pkg_end > parser_state.aml_end) || + (parser_state.pkg_end < parser_state.aml)) { + return (AE_AML_PACKAGE_LIMIT); + } path = acpi_ps_get_next_namestring(&parser_state); method_flags = *parser_state.aml++; diff --git a/drivers/acpi/acpica/psargs.c b/drivers/acpi/acpica/psargs.c index 064652d11d9aa..34d887e2211ac 100644 --- a/drivers/acpi/acpica/psargs.c +++ b/drivers/acpi/acpica/psargs.c @@ -867,6 +867,10 @@ acpi_ps_get_next_arg(struct acpi_walk_state *walk_state, parser_state->pkg_end = acpi_ps_get_next_package_end(parser_state); + if ((parser_state->pkg_end > parser_state->aml_end) + || (parser_state->pkg_end < parser_state->aml)) { + return_ACPI_STATUS(AE_AML_PACKAGE_LIMIT); + } break; case ARGP_FIELDLIST: diff --git a/drivers/acpi/acpica/psloop.c b/drivers/acpi/acpica/psloop.c index 35111ff2526b1..7c3caf0ccab62 100644 --- a/drivers/acpi/acpica/psloop.c +++ b/drivers/acpi/acpica/psloop.c @@ -361,6 +361,13 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) walk_state->parser_state.aml = acpi_ps_get_next_package_end (&walk_state->parser_state); + if ((walk_state->parser_state.aml > + walk_state->parser_state.aml_end) + || (walk_state->parser_state.aml < + walk_state->aml)) { + return_ACPI_STATUS + (AE_AML_PACKAGE_LIMIT); + } walk_state->aml = walk_state->parser_state.aml; } @@ -421,6 +428,14 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) parser_state->aml = acpi_ps_get_next_package_end (parser_state); + if ((parser_state->aml > + parser_state->aml_end) + || (parser_state->aml < + walk_state->control_state-> + control.aml_predicate_start)) { + return_ACPI_STATUS + (AE_AML_PACKAGE_LIMIT); + } walk_state->aml = parser_state->aml; ACPI_ERROR((AE_INFO, @@ -436,6 +451,16 @@ acpi_status acpi_ps_parse_loop(struct acpi_walk_state *walk_state) walk_state->parser_state.aml = acpi_ps_get_next_package_end (parser_state); + if ((walk_state->parser_state. + aml > + walk_state->parser_state. + aml_end) + || (walk_state-> + parser_state.aml < + walk_state->aml)) { + return_ACPI_STATUS + (AE_AML_PACKAGE_LIMIT); + } walk_state->aml = parser_state->aml; } diff --git a/drivers/acpi/acpica/psparse.c b/drivers/acpi/acpica/psparse.c index 55a416e56fd83..b4f21a8988795 100644 --- a/drivers/acpi/acpica/psparse.c +++ b/drivers/acpi/acpica/psparse.c @@ -300,6 +300,7 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state, { struct acpi_parse_state *parser_state = &walk_state->parser_state; acpi_status status = AE_CTRL_PENDING; + u8 *aml; ACPI_FUNCTION_TRACE_PTR(ps_next_parse_state, op); @@ -344,7 +345,14 @@ acpi_ps_next_parse_state(struct acpi_walk_state *walk_state, * Predicate of an IF was true, and we are at the matching ELSE. * Just close out this package */ + aml = parser_state->aml; + parser_state->aml = acpi_ps_get_next_package_end(parser_state); + if ((parser_state->aml > parser_state->aml_end) || + (parser_state->aml < aml)) { + status = AE_AML_PACKAGE_LIMIT; + break; + } status = AE_CTRL_PENDING; break; -- 2.53.0