From cf9610f9116d55c5a66ef9f1faecacabd93a9322 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 24 Aug 2026 08:46:03 -0700 Subject: Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl Pull pin control updates from Linus Walleij: "Core changes: - Use the non-blocking mux_state_try_select() in the generic MUX pin control back-end - Free pin maps on pinctrl_generic_to_map() failure in the core helpers New hardware pin control: - Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC (this is for the low power audio, LPASS = Low Power Audio SubSystem portions) - Upboard support on top of the Intel pin controller - Apple T6030 and T6031 support (just compatible strings) - Samsung Exynos 8855 SoC - Mediatek MT6858 SoC - Rockchip RK3308B and RV1106 SoCs - Airoha EN7523 and AN7563 SoCs Improvements: - Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable - Qualcomm improvements on top of the Qualcomm PDC (power domain controller) irqchip improvements from tglx:s tree - Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups - The NPCM8xx driver has been put into shape fixing many pin and group definitions - Some non-urgent Tegra 264 pin assignments are fixed up - Some non-urgent fixups to Airoha AN7581 and AN7583 registers and pin assignments, missing features etc" * tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits) dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema pinctrl: meson: sync some modify from A4 pinctrl: meson: a4: Add input enable pin configuration pinctrl: realtek: rtd1625: remove unused group name spdif_sel pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13 dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema Revert "Merge branch 'ib-rsk7204' into devel" pinctrl: rockchip: Add RV1106 pinctrl support dt-bindings: pinctrl: rockchip: Add RV1106 compatible pinctrl: rockchip: Decode drive strength in the get function pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable pinctrl: airoha: add support of an7563 SoC dt-bindings: pinctrl: airoha: add support of an7563 pin controller pinctrl: airoha: try to find chip scu node by phandle first pinctrl: airoha: add support of en7523 SoC dt-bindings: pinctrl: airoha: add support of en7523 pin controller pinctrl: airoha: an7583: add support for olt pinmux pinctrl: airoha: an7583: add support for pon_alt pinmux pinctrl: airoha: an7583: add support for npu_uart pinmux dt-bindings: pinctrl: airoha: an7583: add missed features ... --- security/apparmor/capability.c | 223 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 223 insertions(+) create mode 100644 security/apparmor/capability.c (limited to 'security/apparmor/capability.c') diff --git a/security/apparmor/capability.c b/security/apparmor/capability.c new file mode 100644 index 000000000..b9ea6bc45 --- /dev/null +++ b/security/apparmor/capability.c @@ -0,0 +1,223 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * AppArmor security module + * + * This file contains AppArmor capability mediation functions + * + * Copyright (C) 1998-2008 Novell/SUSE + * Copyright 2009-2010 Canonical Ltd. + */ + +#include +#include +#include +#include +#include + +#include "include/apparmor.h" +#include "include/capability.h" +#include "include/cred.h" +#include "include/policy.h" +#include "include/audit.h" + +/* + * Table of capability names: we generate it from capabilities.h. + */ +#include "capability_names.h" + +struct aa_sfs_entry aa_sfs_entry_caps[] = { + AA_SFS_FILE_STRING("mask", AA_SFS_CAPS_MASK), + AA_SFS_FILE_BOOLEAN("extended", 1), + { } +}; + +struct audit_cache { + const struct cred *ad_subj_cred; + /* Capabilities go from 0 to CAP_LAST_CAP */ + u64 ktime_ns_expiration[CAP_LAST_CAP+1]; +}; + +static DEFINE_PER_CPU(struct audit_cache, audit_cache); + +/** + * audit_cb - call back for capability components of audit struct + * @ab: audit buffer (NOT NULL) + * @va: audit struct to audit data from (NOT NULL) + */ +static void audit_cb(struct audit_buffer *ab, void *va) +{ + struct common_audit_data *sa = va; + + audit_log_format(ab, " capname="); + audit_log_untrustedstring(ab, capability_names[sa->u.cap]); +} + +/** + * audit_caps - audit a capability + * @ad: audit data + * @profile: profile being tested for confinement (NOT NULL) + * @cap: capability tested + * @error: error code returned by test + * + * Do auditing of capability and handle, audit/complain/kill modes switching + * and duplicate message elimination. + * + * Returns: 0 or ad->error on success, error code on failure + */ +static int audit_caps(struct apparmor_audit_data *ad, struct aa_profile *profile, + int cap, int error) +{ + const u64 AUDIT_CACHE_TIMEOUT_NS = 1000*1000*1000; /* 1 second */ + + struct aa_ruleset *rules = profile->label.rules[0]; + struct audit_cache *ent; + int type = AUDIT_APPARMOR_AUTO; + + ad->error = error; + + if (likely(!error)) { + /* test if auditing is being forced */ + if (likely((AUDIT_MODE(profile) != AUDIT_ALL) && + !cap_raised(rules->caps.audit, cap))) + return 0; + type = AUDIT_APPARMOR_AUDIT; + } else if (KILL_MODE(profile) || + cap_raised(rules->caps.kill, cap)) { + type = AUDIT_APPARMOR_KILL; + } else if (cap_raised(rules->caps.quiet, cap) && + AUDIT_MODE(profile) != AUDIT_NOQUIET && + AUDIT_MODE(profile) != AUDIT_ALL) { + /* quiet auditing */ + return error; + } + + /* Do simple duplicate message elimination */ + ent = &get_cpu_var(audit_cache); + /* If the capability was never raised the timestamp check would also catch that */ + if (ad->subj_cred == ent->ad_subj_cred && ktime_get_ns() <= ent->ktime_ns_expiration[cap]) { + put_cpu_var(audit_cache); + if (COMPLAIN_MODE(profile)) + return complain_error(error); + return error; + } else { + put_cred(ent->ad_subj_cred); + ent->ad_subj_cred = get_cred(ad->subj_cred); + ent->ktime_ns_expiration[cap] = ktime_get_ns() + AUDIT_CACHE_TIMEOUT_NS; + } + put_cpu_var(audit_cache); + + return aa_audit(type, profile, ad, audit_cb); +} + +/** + * profile_capable - test if profile allows use of capability @cap + * @profile: profile being enforced (NOT NULL, NOT unconfined) + * @cap: capability to test if allowed + * @opts: CAP_OPT_NOAUDIT bit determines whether audit record is generated + * @ad: audit data (NOT NULL) + * + * Returns: 0 if allowed else -EPERM + */ +static int profile_capable(struct aa_profile *profile, int cap, + unsigned int opts, struct apparmor_audit_data *ad) +{ + struct aa_ruleset *rules = profile->label.rules[0]; + aa_state_t state; + int error; + + state = RULE_MEDIATES(rules, ad->class); + if (state) { + struct aa_perms perms = { }; + u32 request; + + /* caps broken into 256 x 32 bit permission chunks */ + state = aa_dfa_next(rules->policy->dfa, state, cap >> 5); + request = 1 << (cap & 0x1f); + perms = *aa_lookup_perms(rules->policy, state); + aa_apply_modes_to_perms(profile, &perms); + + if (opts & CAP_OPT_NOAUDIT) { + if (perms.complain & request) + ad->info = "optional: no audit"; + else + ad = NULL; + } + return aa_check_perms(profile, &perms, request, ad, + audit_cb); + } + + /* fallback to old caps mediation that doesn't support conditionals */ + if (cap_raised(rules->caps.allow, cap) && + !cap_raised(rules->caps.denied, cap)) + error = 0; + else + error = -EPERM; + + if (opts & CAP_OPT_NOAUDIT) { + if (!COMPLAIN_MODE(profile)) + return error; + /* audit the cap request in complain mode but note that it + * should be optional. + */ + ad->info = "optional: no audit"; + } + + return audit_caps(ad, profile, cap, error); +} + +/** + * aa_capable - test permission to use capability + * @subj_cred: cred we are testing capability against + * @label: label being tested for capability (NOT NULL) + * @cap: capability to be tested + * @opts: CAP_OPT_NOAUDIT bit determines whether audit record is generated + * + * Look up capability in profile capability set. + * + * Returns: 0 on success, or else an error code. + */ +int aa_capable(const struct cred *subj_cred, struct aa_label *label, + int cap, unsigned int opts) +{ + struct aa_profile *profile; + int error = 0; + DEFINE_AUDIT_DATA(ad, LSM_AUDIT_DATA_CAP, AA_CLASS_CAP, OP_CAPABLE); + + ad.subj_cred = subj_cred; + ad.common.u.cap = cap; + error = fn_for_each_confined(label, profile, + profile_capable(profile, cap, opts, &ad)); + + return error; +} + +kernel_cap_t aa_profile_capget(struct aa_profile *profile) +{ + struct aa_ruleset *rules = profile->label.rules[0]; + aa_state_t state; + + state = RULE_MEDIATES(rules, AA_CLASS_CAP); + if (state) { + kernel_cap_t caps = CAP_EMPTY_SET; + int i; + + /* caps broken into up to 256, 32 bit permission chunks */ + for (i = 0; i < (CAP_LAST_CAP >> 5); i++) { + struct aa_perms perms = { }; + aa_state_t tmp; + + tmp = aa_dfa_next(rules->policy->dfa, state, i); + perms = *aa_lookup_perms(rules->policy, tmp); + aa_apply_modes_to_perms(profile, &perms); + caps.val |= ((u64)(perms.allow)) << (i * 5); + caps.val |= ((u64)(perms.complain)) << (i * 5); + } + return caps; + } + + /* fallback to old caps */ + if (COMPLAIN_MODE(profile)) + return CAP_FULL_SET; + + return rules->caps.allow; +} -- cgit v1.3.1