From f4cdf7ca9a1fdcca413157df19753f388a5a224e Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Wed, 19 Aug 2026 10:09:22 -0700 Subject: Merge tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - v4l2-core: added ISP statistics support and per-block validation - v4l2-core: Allow unknown HDR10 white point and luminance - New camera sensors: Sony IMX678 and IMX471m, Himax HM1092 IR sensor - New codec: Milos: VPU v2.0 codec support - isp driver: gained support for Dreamchip RPPX1 ISP framework - vsp1 driver: gained support for RZ/T2H and RZ/N2H - Novalake driver: gained CVS support for new NVL hardware - dvb-core: fix feed leak on failed DMX_ADD_PID - several driver fixes, cleanups and minor improvements * tag 'media/v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (308 commits) media: ipu-bridge: check all DMI entries when overriding sensor rotation media: v4l2-async: avoid deleting unlinked ASC entry on link error media: rzg2l-cru: Align bytesperline to hardware DMA stride requirement media: intel/ipu6: fix async notifier cleanup leak on parse error media: staging/ipu7: fix async notifier UAF on probe error path media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem() media: rcar-isp: Fix VSPX reference leaks media: rcar-isp: Release ISPCORE resources media: i2c: imx415: Release runtime PM reference on VBLANK error media: i2c: imx415: Return test pattern write errors media: renesas: vsp1: Declare index variables in for loop statement media: renesas: vsp1: Make reset control optional to support platforms without a reset line media: dt-bindings: media: renesas,vsp1: Document RZ/T2H and RZ/N2H SoCs media: dt-bindings: media: renesas,fcp: Document RZ/T2H and RZ/N2H SoCs media: nxp: imx8-isi: Add additional 32-bit RGB format support media: nxp: imx8-isi: Add 16-bit raw Bayer format support media: nxp: imx8-isi: Implement per-stream reference counting for multiplexed streams media: nxp: imx8-isi: Use BIT_ULL() for 64-bit stream masks media: nxp: imx8-isi: Correct color map between V4L2 and ISI ... --- security/selinux/ima.c | 120 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 120 insertions(+) create mode 100644 security/selinux/ima.c (limited to 'security/selinux/ima.c') diff --git a/security/selinux/ima.c b/security/selinux/ima.c new file mode 100644 index 000000000..aa34da9b0 --- /dev/null +++ b/security/selinux/ima.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2021 Microsoft Corporation + * + * Author: Lakshmi Ramasubramanian (nramas@linux.microsoft.com) + * + * Measure critical data structures maintained by SELinux + * using IMA subsystem. + */ +#include +#include +#include "security.h" +#include "ima.h" + +/* + * selinux_ima_collect_state - Read selinux configuration settings + * + * On success returns the configuration settings string. + * On error, returns NULL. + */ +static char *selinux_ima_collect_state(void) +{ + const char *on = "=1;", *off = "=0;"; + char *buf; + int buf_len, len, i, rc; + + buf_len = strlen("initialized=0;enforcing=0;checkreqprot=0;") + 1; + + len = strlen(on); + for (i = 0; i < __POLICYDB_CAP_MAX; i++) + buf_len += strlen(selinux_policycap_names[i]) + len; + + buf = kzalloc(buf_len, GFP_KERNEL); + if (!buf) + return NULL; + + rc = strscpy(buf, "initialized", buf_len); + WARN_ON(rc < 0); + + rc = strlcat(buf, selinux_initialized() ? on : off, buf_len); + WARN_ON(rc >= buf_len); + + rc = strlcat(buf, "enforcing", buf_len); + WARN_ON(rc >= buf_len); + + rc = strlcat(buf, enforcing_enabled() ? on : off, buf_len); + WARN_ON(rc >= buf_len); + + rc = strlcat(buf, "checkreqprot", buf_len); + WARN_ON(rc >= buf_len); + + rc = strlcat(buf, checkreqprot_get() ? on : off, buf_len); + WARN_ON(rc >= buf_len); + + for (i = 0; i < __POLICYDB_CAP_MAX; i++) { + rc = strlcat(buf, selinux_policycap_names[i], buf_len); + WARN_ON(rc >= buf_len); + + rc = strlcat(buf, selinux_state.policycap[i] ? on : off, + buf_len); + WARN_ON(rc >= buf_len); + } + + return buf; +} + +/* + * selinux_ima_measure_state_locked - Measure SELinux state and hash of policy + */ +void selinux_ima_measure_state_locked(void) +{ + char *state_str = NULL; + void *policy = NULL; + size_t policy_len; + int rc = 0; + + lockdep_assert_held(&selinux_state.policy_mutex); + + state_str = selinux_ima_collect_state(); + if (!state_str) { + pr_err("SELinux: %s: failed to read state.\n", __func__); + return; + } + + ima_measure_critical_data("selinux", "selinux-state", + state_str, strlen(state_str), false, + NULL, 0); + + kfree(state_str); + + /* + * Measure SELinux policy only after initialization is completed. + */ + if (!selinux_initialized()) + return; + + rc = security_read_state_kernel(&policy, &policy_len); + if (rc) { + pr_err("SELinux: %s: failed to read policy %d.\n", __func__, rc); + return; + } + + ima_measure_critical_data("selinux", "selinux-policy-hash", + policy, policy_len, true, + NULL, 0); + + vfree(policy); +} + +/* + * selinux_ima_measure_state - Measure SELinux state and hash of policy + */ +void selinux_ima_measure_state(void) +{ + lockdep_assert_not_held(&selinux_state.policy_mutex); + + mutex_lock(&selinux_state.policy_mutex); + selinux_ima_measure_state_locked(); + mutex_unlock(&selinux_state.policy_mutex); +} -- cgit v1.3.1