Re: [PATCH v34 13/29] LSM: Use lsmblob in security_cred_getsecid

Hi Casey, I love your patch! Yet something to improve: [auto build test ERROR on pcmoore-selinux/next] [also build test ERROR on linus/master v5.18-rc1 next-20220407] [cannot apply to pcmoore-audit/next jmorris-security/next-testing] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/intel-lab-lkp/linux/commits/Casey-Schaufler/integrity-... base: https://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/selinux.git next config: s390-randconfig-r002-20220407 (https://download.01.org/0day-ci/archive/20220408/202204081320.5x10QzQZ-lk...) compiler: s390-linux-gcc (GCC) 11.2.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://github.com/intel-lab-lkp/linux/commit/bc9f0527e49aae03063d9cb0d32... git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Casey-Schaufler/integrity-disassociate-ima_filter_rule-from-security_audit_rule/20220408-062243 git checkout bc9f0527e49aae03063d9cb0d32345e53d2e2ad3 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=s390 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): drivers/android/binder.c: In function 'binder_transaction': 2986 | security_cred_getsecid(proc->cred, &blob); | ^~~~~ | | | struct lsmblob * In file included from drivers/android/binder.c:63: include/linux/security.h:1126:70: note: expected 'u32 *' {aka 'unsigned int *'} but argument is of type 'struct lsmblob *' 1126 | static inline void security_cred_getsecid(const struct cred *c, u32 *secid) | ~~~~~^~~~~ cc1: some warnings being treated as errors vim +/security_cred_getsecid +2986 drivers/android/binder.c 2699 2700 static void binder_transaction(struct binder_proc *proc, 2701 struct binder_thread *thread, 2702 struct binder_transaction_data *tr, int reply, 2703 binder_size_t extra_buffers_size) 2704 { 2705 int ret; 2706 struct binder_transaction *t; 2707 struct binder_work *w; 2708 struct binder_work *tcomplete; 2709 binder_size_t buffer_offset = 0; 2710 binder_size_t off_start_offset, off_end_offset; 2711 binder_size_t off_min; 2712 binder_size_t sg_buf_offset, sg_buf_end_offset; 2713 binder_size_t user_offset = 0; 2714 struct binder_proc *target_proc = NULL; 2715 struct binder_thread *target_thread = NULL; 2716 struct binder_node *target_node = NULL; 2717 struct binder_transaction *in_reply_to = NULL; 2718 struct binder_transaction_log_entry *e; 2719 uint32_t return_error = 0; 2720 uint32_t return_error_param = 0; 2721 uint32_t return_error_line = 0; 2722 binder_size_t last_fixup_obj_off = 0; 2723 binder_size_t last_fixup_min_off = 0; 2724 struct binder_context *context = proc->context; 2725 int t_debug_id = atomic_inc_return(&binder_last_id); 2726 char *secctx = NULL; 2727 u32 secctx_sz = 0; 2728 struct list_head sgc_head; 2729 struct list_head pf_head; 2730 const void __user *user_buffer = (const void __user *) 2731 (uintptr_t)tr->data.ptr.buffer; 2732 INIT_LIST_HEAD(&sgc_head); 2733 INIT_LIST_HEAD(&pf_head); 2734 2735 e = binder_transaction_log_add(&binder_transaction_log); 2736 e->debug_id = t_debug_id; 2737 e->call_type = reply ? 2 : !!(tr->flags & TF_ONE_WAY); 2738 e->from_proc = proc->pid; 2739 e->from_thread = thread->pid; 2740 e->target_handle = tr->target.handle; 2741 e->data_size = tr->data_size; 2742 e->offsets_size = tr->offsets_size; 2743 strscpy(e->context_name, proc->context->name, BINDERFS_MAX_NAME); 2744 2745 if (reply) { 2746 binder_inner_proc_lock(proc); 2747 in_reply_to = thread->transaction_stack; 2748 if (in_reply_to == NULL) { 2749 binder_inner_proc_unlock(proc); 2750 binder_user_error("%d:%d got reply transaction with no transaction stack\n", 2751 proc->pid, thread->pid); 2752 return_error = BR_FAILED_REPLY; 2753 return_error_param = -EPROTO; 2754 return_error_line = __LINE__; 2755 goto err_empty_call_stack; 2756 } 2757 if (in_reply_to->to_thread != thread) { 2758 spin_lock(&in_reply_to->lock); 2759 binder_user_error("%d:%d got reply transaction with bad transaction stack, transaction %d has target %d:%d\n", 2760 proc->pid, thread->pid, in_reply_to->debug_id, 2761 in_reply_to->to_proc ? 2762 in_reply_to->to_proc->pid : 0, 2763 in_reply_to->to_thread ? 2764 in_reply_to->to_thread->pid : 0); 2765 spin_unlock(&in_reply_to->lock); 2766 binder_inner_proc_unlock(proc); 2767 return_error = BR_FAILED_REPLY; 2768 return_error_param = -EPROTO; 2769 return_error_line = __LINE__; 2770 in_reply_to = NULL; 2771 goto err_bad_call_stack; 2772 } 2773 thread->transaction_stack = in_reply_to->to_parent; 2774 binder_inner_proc_unlock(proc); 2775 binder_set_nice(in_reply_to->saved_priority); 2776 target_thread = binder_get_txn_from_and_acq_inner(in_reply_to); 2777 if (target_thread == NULL) { 2778 /* annotation for sparse */ 2779 __release(&target_thread->proc->inner_lock); 2780 return_error = BR_DEAD_REPLY; 2781 return_error_line = __LINE__; 2782 goto err_dead_binder; 2783 } 2784 if (target_thread->transaction_stack != in_reply_to) { 2785 binder_user_error("%d:%d got reply transaction with bad target transaction stack %d, expected %d\n", 2786 proc->pid, thread->pid, 2787 target_thread->transaction_stack ? 2788 target_thread->transaction_stack->debug_id : 0, 2789 in_reply_to->debug_id); 2790 binder_inner_proc_unlock(target_thread->proc); 2791 return_error = BR_FAILED_REPLY; 2792 return_error_param = -EPROTO; 2793 return_error_line = __LINE__; 2794 in_reply_to = NULL; 2795 target_thread = NULL; 2796 goto err_dead_binder; 2797 } 2798 target_proc = target_thread->proc; 2799 target_proc->tmp_ref++; 2800 binder_inner_proc_unlock(target_thread->proc); 2801 } else { 2802 if (tr->target.handle) { 2803 struct binder_ref *ref; 2804 2805 /* 2806 * There must already be a strong ref 2807 * on this node. If so, do a strong 2808 * increment on the node to ensure it 2809 * stays alive until the transaction is 2810 * done. 2811 */ 2812 binder_proc_lock(proc); 2813 ref = binder_get_ref_olocked(proc, tr->target.handle, 2814 true); 2815 if (ref) { 2816 target_node = binder_get_node_refs_for_txn( 2817 ref->node, &target_proc, 2818 &return_error); 2819 } else { 2820 binder_user_error("%d:%d got transaction to invalid handle, %u\n", 2821 proc->pid, thread->pid, tr->target.handle); 2822 return_error = BR_FAILED_REPLY; 2823 } 2824 binder_proc_unlock(proc); 2825 } else { 2826 mutex_lock(&context->context_mgr_node_lock); 2827 target_node = context->binder_context_mgr_node; 2828 if (target_node) 2829 target_node = binder_get_node_refs_for_txn( 2830 target_node, &target_proc, 2831 &return_error); 2832 else 2833 return_error = BR_DEAD_REPLY; 2834 mutex_unlock(&context->context_mgr_node_lock); 2835 if (target_node && target_proc->pid == proc->pid) { 2836 binder_user_error("%d:%d got transaction to context manager from process owning it\n", 2837 proc->pid, thread->pid); 2838 return_error = BR_FAILED_REPLY; 2839 return_error_param = -EINVAL; 2840 return_error_line = __LINE__; 2841 goto err_invalid_target_handle; 2842 } 2843 } 2844 if (!target_node) { 2845 /* 2846 * return_error is set above 2847 */ 2848 return_error_param = -EINVAL; 2849 return_error_line = __LINE__; 2850 goto err_dead_binder; 2851 } 2852 e->to_node = target_node->debug_id; 2853 if (WARN_ON(proc == target_proc)) { 2854 return_error = BR_FAILED_REPLY; 2855 return_error_param = -EINVAL; 2856 return_error_line = __LINE__; 2857 goto err_invalid_target_handle; 2858 } 2859 if (security_binder_transaction(proc->cred, 2860 target_proc->cred) < 0) { 2861 return_error = BR_FAILED_REPLY; 2862 return_error_param = -EPERM; 2863 return_error_line = __LINE__; 2864 goto err_invalid_target_handle; 2865 } 2866 binder_inner_proc_lock(proc); 2867 2868 w = list_first_entry_or_null(&thread->todo, 2869 struct binder_work, entry); 2870 if (!(tr->flags & TF_ONE_WAY) && w && 2871 w->type == BINDER_WORK_TRANSACTION) { 2872 /* 2873 * Do not allow new outgoing transaction from a 2874 * thread that has a transaction at the head of 2875 * its todo list. Only need to check the head 2876 * because binder_select_thread_ilocked picks a 2877 * thread from proc->waiting_threads to enqueue 2878 * the transaction, and nothing is queued to the 2879 * todo list while the thread is on waiting_threads. 2880 */ 2881 binder_user_error("%d:%d new transaction not allowed when there is a transaction on thread todo\n", 2882 proc->pid, thread->pid); 2883 binder_inner_proc_unlock(proc); 2884 return_error = BR_FAILED_REPLY; 2885 return_error_param = -EPROTO; 2886 return_error_line = __LINE__; 2887 goto err_bad_todo_list; 2888 } 2889 2890 if (!(tr->flags & TF_ONE_WAY) && thread->transaction_stack) { 2891 struct binder_transaction *tmp; 2892 2893 tmp = thread->transaction_stack; 2894 if (tmp->to_thread != thread) { 2895 spin_lock(&tmp->lock); 2896 binder_user_error("%d:%d got new transaction with bad transaction stack, transaction %d has target %d:%d\n", 2897 proc->pid, thread->pid, tmp->debug_id, 2898 tmp->to_proc ? tmp->to_proc->pid : 0, 2899 tmp->to_thread ? 2900 tmp->to_thread->pid : 0); 2901 spin_unlock(&tmp->lock); 2902 binder_inner_proc_unlock(proc); 2903 return_error = BR_FAILED_REPLY; 2904 return_error_param = -EPROTO; 2905 return_error_line = __LINE__; 2906 goto err_bad_call_stack; 2907 } 2908 while (tmp) { 2909 struct binder_thread *from; 2910 2911 spin_lock(&tmp->lock); 2912 from = tmp->from; 2913 if (from && from->proc == target_proc) { 2914 atomic_inc(&from->tmp_ref); 2915 target_thread = from; 2916 spin_unlock(&tmp->lock); 2917 break; 2918 } 2919 spin_unlock(&tmp->lock); 2920 tmp = tmp->from_parent; 2921 } 2922 } 2923 binder_inner_proc_unlock(proc); 2924 } 2925 if (target_thread) 2926 e->to_thread = target_thread->pid; 2927 e->to_proc = target_proc->pid; 2928 2929 /* TODO: reuse incoming transaction for reply */ 2930 t = kzalloc(sizeof(*t), GFP_KERNEL); 2931 if (t == NULL) { 2932 return_error = BR_FAILED_REPLY; 2933 return_error_param = -ENOMEM; 2934 return_error_line = __LINE__; 2935 goto err_alloc_t_failed; 2936 } 2937 INIT_LIST_HEAD(&t->fd_fixups); 2938 binder_stats_created(BINDER_STAT_TRANSACTION); 2939 spin_lock_init(&t->lock); 2940 2941 tcomplete = kzalloc(sizeof(*tcomplete), GFP_KERNEL); 2942 if (tcomplete == NULL) { 2943 return_error = BR_FAILED_REPLY; 2944 return_error_param = -ENOMEM; 2945 return_error_line = __LINE__; 2946 goto err_alloc_tcomplete_failed; 2947 } 2948 binder_stats_created(BINDER_STAT_TRANSACTION_COMPLETE); 2949 2950 t->debug_id = t_debug_id; 2951 2952 if (reply) 2953 binder_debug(BINDER_DEBUG_TRANSACTION, 2954 "%d:%d BC_REPLY %d -> %d:%d, data %016llx-%016llx size %lld-%lld-%lld\n", 2955 proc->pid, thread->pid, t->debug_id, 2956 target_proc->pid, target_thread->pid, 2957 (u64)tr->data.ptr.buffer, 2958 (u64)tr->data.ptr.offsets, 2959 (u64)tr->data_size, (u64)tr->offsets_size, 2960 (u64)extra_buffers_size); 2961 else 2962 binder_debug(BINDER_DEBUG_TRANSACTION, 2963 "%d:%d BC_TRANSACTION %d -> %d - node %d, data %016llx-%016llx size %lld-%lld-%lld\n", 2964 proc->pid, thread->pid, t->debug_id, 2965 target_proc->pid, target_node->debug_id, 2966 (u64)tr->data.ptr.buffer, 2967 (u64)tr->data.ptr.offsets, 2968 (u64)tr->data_size, (u64)tr->offsets_size, 2969 (u64)extra_buffers_size); 2970 2971 if (!reply && !(tr->flags & TF_ONE_WAY)) 2972 t->from = thread; 2973 else 2974 t->from = NULL; 2975 t->sender_euid = task_euid(proc->tsk); 2976 t->to_proc = target_proc; 2977 t->to_thread = target_thread; 2978 t->code = tr->code; 2979 t->flags = tr->flags; 2980 t->priority = task_nice(current); 2981 2982 if (target_node && target_node->txn_security_ctx) { 2983 struct lsmblob blob; 2984 size_t added_size; 2985 2987 ret = security_secid_to_secctx(&blob, &secctx, &secctx_sz); 2988 if (ret) { 2989 return_error = BR_FAILED_REPLY; 2990 return_error_param = ret; 2991 return_error_line = __LINE__; 2992 goto err_get_secctx_failed; 2993 } 2994 added_size = ALIGN(secctx_sz, sizeof(u64)); 2995 extra_buffers_size += added_size; 2996 if (extra_buffers_size < added_size) { 2997 /* integer overflow of extra_buffers_size */ 2998 return_error = BR_FAILED_REPLY; 2999 return_error_param = -EINVAL; 3000 return_error_line = __LINE__; 3001 goto err_bad_extra_size; 3002 } 3003 } 3004 3005 trace_binder_transaction(reply, t, target_node); 3006 3007 t->buffer = binder_alloc_new_buf(&target_proc->alloc, tr->data_size, 3008 tr->offsets_size, extra_buffers_size, 3009 !reply && (t->flags & TF_ONE_WAY), current->tgid); 3010 if (IS_ERR(t->buffer)) { 3011 /* 3012 * -ESRCH indicates VMA cleared. The target is dying. 3013 */ 3014 return_error_param = PTR_ERR(t->buffer); 3015 return_error = return_error_param == -ESRCH ? 3016 BR_DEAD_REPLY : BR_FAILED_REPLY; 3017 return_error_line = __LINE__; 3018 t->buffer = NULL; 3019 goto err_binder_alloc_buf_failed; 3020 } 3021 if (secctx) { 3022 int err; 3023 size_t buf_offset = ALIGN(tr->data_size, sizeof(void *)) + 3024 ALIGN(tr->offsets_size, sizeof(void *)) + 3025 ALIGN(extra_buffers_size, sizeof(void *)) - 3026 ALIGN(secctx_sz, sizeof(u64)); 3027 3028 t->security_ctx = (uintptr_t)t->buffer->user_data + buf_offset; 3029 err = binder_alloc_copy_to_buffer(&target_proc->alloc, 3030 t->buffer, buf_offset, 3031 secctx, secctx_sz); 3032 if (err) { 3033 t->security_ctx = 0; 3034 WARN_ON(1); 3035 } 3036 security_release_secctx(secctx, secctx_sz); 3037 secctx = NULL; 3038 } 3039 t->buffer->debug_id = t->debug_id; 3040 t->buffer->transaction = t; 3041 t->buffer->target_node = target_node; 3042 t->buffer->clear_on_free = !!(t->flags & TF_CLEAR_BUF); 3043 trace_binder_transaction_alloc_buf(t->buffer); 3044 3045 if (binder_alloc_copy_user_to_buffer( 3046 &target_proc->alloc, 3047 t->buffer, 3048 ALIGN(tr->data_size, sizeof(void *)), 3049 (const void __user *) 3050 (uintptr_t)tr->data.ptr.offsets, 3051 tr->offsets_size)) { 3052 binder_user_error("%d:%d got transaction with invalid offsets ptr\n", 3053 proc->pid, thread->pid); 3054 return_error = BR_FAILED_REPLY; 3055 return_error_param = -EFAULT; 3056 return_error_line = __LINE__; 3057 goto err_copy_data_failed; 3058 } 3059 if (!IS_ALIGNED(tr->offsets_size, sizeof(binder_size_t))) { 3060 binder_user_error("%d:%d got transaction with invalid offsets size, %lld\n", 3061 proc->pid, thread->pid, (u64)tr->offsets_size); 3062 return_error = BR_FAILED_REPLY; 3063 return_error_param = -EINVAL; 3064 return_error_line = __LINE__; 3065 goto err_bad_offset; 3066 } 3067 if (!IS_ALIGNED(extra_buffers_size, sizeof(u64))) { 3068 binder_user_error("%d:%d got transaction with unaligned buffers size, %lld\n", 3069 proc->pid, thread->pid, 3070 (u64)extra_buffers_size); 3071 return_error = BR_FAILED_REPLY; 3072 return_error_param = -EINVAL; 3073 return_error_line = __LINE__; 3074 goto err_bad_offset; 3075 } 3076 off_start_offset = ALIGN(tr->data_size, sizeof(void *)); 3077 buffer_offset = off_start_offset; 3078 off_end_offset = off_start_offset + tr->offsets_size; 3079 sg_buf_offset = ALIGN(off_end_offset, sizeof(void *)); 3080 sg_buf_end_offset = sg_buf_offset + extra_buffers_size - 3081 ALIGN(secctx_sz, sizeof(u64)); 3082 off_min = 0; 3083 for (buffer_offset = off_start_offset; buffer_offset < off_end_offset; 3084 buffer_offset += sizeof(binder_size_t)) { 3085 struct binder_object_header *hdr; 3086 size_t object_size; 3087 struct binder_object object; 3088 binder_size_t object_offset; 3089 binder_size_t copy_size; 3090 3091 if (binder_alloc_copy_from_buffer(&target_proc->alloc, 3092 &object_offset, 3093 t->buffer, 3094 buffer_offset, 3095 sizeof(object_offset))) { 3096 return_error = BR_FAILED_REPLY; 3097 return_error_param = -EINVAL; 3098 return_error_line = __LINE__; 3099 goto err_bad_offset; 3100 } 3101 3102 /* 3103 * Copy the source user buffer up to the next object 3104 * that will be processed. 3105 */ 3106 copy_size = object_offset - user_offset; 3107 if (copy_size && (user_offset > object_offset || 3108 binder_alloc_copy_user_to_buffer( 3109 &target_proc->alloc, 3110 t->buffer, user_offset, 3111 user_buffer + user_offset, 3112 copy_size))) { 3113 binder_user_error("%d:%d got transaction with invalid data ptr\n", 3114 proc->pid, thread->pid); 3115 return_error = BR_FAILED_REPLY; 3116 return_error_param = -EFAULT; 3117 return_error_line = __LINE__; 3118 goto err_copy_data_failed; 3119 } 3120 object_size = binder_get_object(target_proc, user_buffer, 3121 t->buffer, object_offset, &object); 3122 if (object_size == 0 || object_offset < off_min) { 3123 binder_user_error("%d:%d got transaction with invalid offset (%lld, min %lld max %lld) or object.\n", 3124 proc->pid, thread->pid, 3125 (u64)object_offset, 3126 (u64)off_min, 3127 (u64)t->buffer->data_size); 3128 return_error = BR_FAILED_REPLY; 3129 return_error_param = -EINVAL; 3130 return_error_line = __LINE__; 3131 goto err_bad_offset; 3132 } 3133 /* 3134 * Set offset to the next buffer fragment to be 3135 * copied 3136 */ 3137 user_offset = object_offset + object_size; 3138 3139 hdr = &object.hdr; 3140 off_min = object_offset + object_size; 3141 switch (hdr->type) { 3142 case BINDER_TYPE_BINDER: 3143 case BINDER_TYPE_WEAK_BINDER: { 3144 struct flat_binder_object *fp; 3145 3146 fp = to_flat_binder_object(hdr); 3147 ret = binder_translate_binder(fp, t, thread); 3148 3149 if (ret < 0 || 3150 binder_alloc_copy_to_buffer(&target_proc->alloc, 3151 t->buffer, 3152 object_offset, 3153 fp, sizeof(*fp))) { 3154 return_error = BR_FAILED_REPLY; 3155 return_error_param = ret; 3156 return_error_line = __LINE__; 3157 goto err_translate_failed; 3158 } 3159 } break; 3160 case BINDER_TYPE_HANDLE: 3161 case BINDER_TYPE_WEAK_HANDLE: { 3162 struct flat_binder_object *fp; 3163 3164 fp = to_flat_binder_object(hdr); 3165 ret = binder_translate_handle(fp, t, thread); 3166 if (ret < 0 || 3167 binder_alloc_copy_to_buffer(&target_proc->alloc, 3168 t->buffer, 3169 object_offset, 3170 fp, sizeof(*fp))) { 3171 return_error = BR_FAILED_REPLY; 3172 return_error_param = ret; 3173 return_error_line = __LINE__; 3174 goto err_translate_failed; 3175 } 3176 } break; 3177 3178 case BINDER_TYPE_FD: { 3179 struct binder_fd_object *fp = to_binder_fd_object(hdr); 3180 binder_size_t fd_offset = object_offset + 3181 (uintptr_t)&fp->fd - (uintptr_t)fp; 3182 int ret = binder_translate_fd(fp->fd, fd_offset, t, 3183 thread, in_reply_to); 3184 3185 fp->pad_binder = 0; 3186 if (ret < 0 || 3187 binder_alloc_copy_to_buffer(&target_proc->alloc, 3188 t->buffer, 3189 object_offset, 3190 fp, sizeof(*fp))) { 3191 return_error = BR_FAILED_REPLY; 3192 return_error_param = ret; 3193 return_error_line = __LINE__; 3194 goto err_translate_failed; 3195 } 3196 } break; 3197 case BINDER_TYPE_FDA: { 3198 struct binder_object ptr_object; 3199 binder_size_t parent_offset; 3200 struct binder_object user_object; 3201 size_t user_parent_size; 3202 struct binder_fd_array_object *fda = 3203 to_binder_fd_array_object(hdr); 3204 size_t num_valid = (buffer_offset - off_start_offset) / 3205 sizeof(binder_size_t); 3206 struct binder_buffer_object *parent = 3207 binder_validate_ptr(target_proc, t->buffer, 3208 &ptr_object, fda->parent, 3209 off_start_offset, 3210 &parent_offset, 3211 num_valid); 3212 if (!parent) { 3213 binder_user_error("%d:%d got transaction with invalid parent offset or type\n", 3214 proc->pid, thread->pid); 3215 return_error = BR_FAILED_REPLY; 3216 return_error_param = -EINVAL; 3217 return_error_line = __LINE__; 3218 goto err_bad_parent; 3219 } 3220 if (!binder_validate_fixup(target_proc, t->buffer, 3221 off_start_offset, 3222 parent_offset, 3223 fda->parent_offset, 3224 last_fixup_obj_off, 3225 last_fixup_min_off)) { 3226 binder_user_error("%d:%d got transaction with out-of-order buffer fixup\n", 3227 proc->pid, thread->pid); 3228 return_error = BR_FAILED_REPLY; 3229 return_error_param = -EINVAL; 3230 return_error_line = __LINE__; 3231 goto err_bad_parent; 3232 } 3233 /* 3234 * We need to read the user version of the parent 3235 * object to get the original user offset 3236 */ 3237 user_parent_size = 3238 binder_get_object(proc, user_buffer, t->buffer, 3239 parent_offset, &user_object); 3240 if (user_parent_size != sizeof(user_object.bbo)) { 3241 binder_user_error("%d:%d invalid ptr object size: %zd vs %zd\n", 3242 proc->pid, thread->pid, 3243 user_parent_size, 3244 sizeof(user_object.bbo)); 3245 return_error = BR_FAILED_REPLY; 3246 return_error_param = -EINVAL; 3247 return_error_line = __LINE__; 3248 goto err_bad_parent; 3249 } 3250 ret = binder_translate_fd_array(&pf_head, fda, 3251 user_buffer, parent, 3252 &user_object.bbo, t, 3253 thread, in_reply_to); 3254 if (!ret) 3255 ret = binder_alloc_copy_to_buffer(&target_proc->alloc, 3256 t->buffer, 3257 object_offset, 3258 fda, sizeof(*fda)); 3259 if (ret) { 3260 return_error = BR_FAILED_REPLY; 3261 return_error_param = ret > 0 ? -EINVAL : ret; 3262 return_error_line = __LINE__; 3263 goto err_translate_failed; 3264 } 3265 last_fixup_obj_off = parent_offset; 3266 last_fixup_min_off = 3267 fda->parent_offset + sizeof(u32) * fda->num_fds; 3268 } break; 3269 case BINDER_TYPE_PTR: { 3270 struct binder_buffer_object *bp = 3271 to_binder_buffer_object(hdr); 3272 size_t buf_left = sg_buf_end_offset - sg_buf_offset; 3273 size_t num_valid; 3274 3275 if (bp->length > buf_left) { 3276 binder_user_error("%d:%d got transaction with too large buffer\n", 3277 proc->pid, thread->pid); 3278 return_error = BR_FAILED_REPLY; 3279 return_error_param = -EINVAL; 3280 return_error_line = __LINE__; 3281 goto err_bad_offset; 3282 } 3283 ret = binder_defer_copy(&sgc_head, sg_buf_offset, 3284 (const void __user *)(uintptr_t)bp->buffer, 3285 bp->length); 3286 if (ret) { 3287 return_error = BR_FAILED_REPLY; 3288 return_error_param = ret; 3289 return_error_line = __LINE__; 3290 goto err_translate_failed; 3291 } 3292 /* Fixup buffer pointer to target proc address space */ 3293 bp->buffer = (uintptr_t) 3294 t->buffer->user_data + sg_buf_offset; 3295 sg_buf_offset += ALIGN(bp->length, sizeof(u64)); 3296 3297 num_valid = (buffer_offset - off_start_offset) / 3298 sizeof(binder_size_t); 3299 ret = binder_fixup_parent(&pf_head, t, 3300 thread, bp, 3301 off_start_offset, 3302 num_valid, 3303 last_fixup_obj_off, 3304 last_fixup_min_off); 3305 if (ret < 0 || 3306 binder_alloc_copy_to_buffer(&target_proc->alloc, 3307 t->buffer, 3308 object_offset, 3309 bp, sizeof(*bp))) { 3310 return_error = BR_FAILED_REPLY; 3311 return_error_param = ret; 3312 return_error_line = __LINE__; 3313 goto err_translate_failed; 3314 } 3315 last_fixup_obj_off = object_offset; 3316 last_fixup_min_off = 0; 3317 } break; 3318 default: 3319 binder_user_error("%d:%d got transaction with invalid object type, %x\n", 3320 proc->pid, thread->pid, hdr->type); 3321 return_error = BR_FAILED_REPLY; 3322 return_error_param = -EINVAL; 3323 return_error_line = __LINE__; 3324 goto err_bad_object_type; 3325 } 3326 } 3327 /* Done processing objects, copy the rest of the buffer */ 3328 if (binder_alloc_copy_user_to_buffer( 3329 &target_proc->alloc, 3330 t->buffer, user_offset, 3331 user_buffer + user_offset, 3332 tr->data_size - user_offset)) { 3333 binder_user_error("%d:%d got transaction with invalid data ptr\n", 3334 proc->pid, thread->pid); 3335 return_error = BR_FAILED_REPLY; 3336 return_error_param = -EFAULT; 3337 return_error_line = __LINE__; 3338 goto err_copy_data_failed; 3339 } 3340 3341 ret = binder_do_deferred_txn_copies(&target_proc->alloc, t->buffer, 3342 &sgc_head, &pf_head); 3343 if (ret) { 3344 binder_user_error("%d:%d got transaction with invalid offsets ptr\n", 3345 proc->pid, thread->pid); 3346 return_error = BR_FAILED_REPLY; 3347 return_error_param = ret; 3348 return_error_line = __LINE__; 3349 goto err_copy_data_failed; 3350 } 3351 if (t->buffer->oneway_spam_suspect) 3352 tcomplete->type = BINDER_WORK_TRANSACTION_ONEWAY_SPAM_SUSPECT; 3353 else 3354 tcomplete->type = BINDER_WORK_TRANSACTION_COMPLETE; 3355 t->work.type = BINDER_WORK_TRANSACTION; 3356 3357 if (reply) { 3358 binder_enqueue_thread_work(thread, tcomplete); 3359 binder_inner_proc_lock(target_proc); 3360 if (target_thread->is_dead) { 3361 return_error = BR_DEAD_REPLY; 3362 binder_inner_proc_unlock(target_proc); 3363 goto err_dead_proc_or_thread; 3364 } 3365 BUG_ON(t->buffer->async_transaction != 0); 3366 binder_pop_transaction_ilocked(target_thread, in_reply_to); 3367 binder_enqueue_thread_work_ilocked(target_thread, &t->work); 3368 target_proc->outstanding_txns++; 3369 binder_inner_proc_unlock(target_proc); 3370 wake_up_interruptible_sync(&target_thread->wait); 3371 binder_free_transaction(in_reply_to); 3372 } else if (!(t->flags & TF_ONE_WAY)) { 3373 BUG_ON(t->buffer->async_transaction != 0); 3374 binder_inner_proc_lock(proc); 3375 /* 3376 * Defer the TRANSACTION_COMPLETE, so we don't return to 3377 * userspace immediately; this allows the target process to 3378 * immediately start processing this transaction, reducing 3379 * latency. We will then return the TRANSACTION_COMPLETE when 3380 * the target replies (or there is an error). 3381 */ 3382 binder_enqueue_deferred_thread_work_ilocked(thread, tcomplete); 3383 t->need_reply = 1; 3384 t->from_parent = thread->transaction_stack; 3385 thread->transaction_stack = t; 3386 binder_inner_proc_unlock(proc); 3387 return_error = binder_proc_transaction(t, 3388 target_proc, target_thread); 3389 if (return_error) { 3390 binder_inner_proc_lock(proc); 3391 binder_pop_transaction_ilocked(thread, t); 3392 binder_inner_proc_unlock(proc); 3393 goto err_dead_proc_or_thread; 3394 } 3395 } else { 3396 BUG_ON(target_node == NULL); 3397 BUG_ON(t->buffer->async_transaction != 1); 3398 binder_enqueue_thread_work(thread, tcomplete); 3399 return_error = binder_proc_transaction(t, target_proc, NULL); 3400 if (return_error) 3401 goto err_dead_proc_or_thread; 3402 } 3403 if (target_thread) 3404 binder_thread_dec_tmpref(target_thread); 3405 binder_proc_dec_tmpref(target_proc); 3406 if (target_node) 3407 binder_dec_node_tmpref(target_node); 3408 /* 3409 * write barrier to synchronize with initialization 3410 * of log entry 3411 */ 3412 smp_wmb(); 3413 WRITE_ONCE(e->debug_id_done, t_debug_id); 3414 return; 3415 3416 err_dead_proc_or_thread: 3417 return_error_line = __LINE__; 3418 binder_dequeue_work(proc, tcomplete); 3419 err_translate_failed: 3420 err_bad_object_type: 3421 err_bad_offset: 3422 err_bad_parent: 3423 err_copy_data_failed: 3424 binder_cleanup_deferred_txn_lists(&sgc_head, &pf_head); 3425 binder_free_txn_fixups(t); 3426 trace_binder_transaction_failed_buffer_release(t->buffer); 3427 binder_transaction_buffer_release(target_proc, NULL, t->buffer, 3428 buffer_offset, true); 3429 if (target_node) 3430 binder_dec_node_tmpref(target_node); 3431 target_node = NULL; 3432 t->buffer->transaction = NULL; 3433 binder_alloc_free_buf(&target_proc->alloc, t->buffer); 3434 err_binder_alloc_buf_failed: 3435 err_bad_extra_size: 3436 if (secctx) 3437 security_release_secctx(secctx, secctx_sz); 3438 err_get_secctx_failed: 3439 kfree(tcomplete); 3440 binder_stats_deleted(BINDER_STAT_TRANSACTION_COMPLETE); 3441 err_alloc_tcomplete_failed: 3442 if (trace_binder_txn_latency_free_enabled()) 3443 binder_txn_latency_free(t); 3444 kfree(t); 3445 binder_stats_deleted(BINDER_STAT_TRANSACTION); 3446 err_alloc_t_failed: 3447 err_bad_todo_list: 3448 err_bad_call_stack: 3449 err_empty_call_stack: 3450 err_dead_binder: 3451 err_invalid_target_handle: 3452 if (target_thread) 3453 binder_thread_dec_tmpref(target_thread); 3454 if (target_proc) 3455 binder_proc_dec_tmpref(target_proc); 3456 if (target_node) { 3457 binder_dec_node(target_node, 1, 0); 3458 binder_dec_node_tmpref(target_node); 3459 } 3460 3461 binder_debug(BINDER_DEBUG_FAILED_TRANSACTION, 3462 "%d:%d transaction failed %d/%d, size %lld-%lld line %d\n", 3463 proc->pid, thread->pid, return_error, return_error_param, 3464 (u64)tr->data_size, (u64)tr->offsets_size, 3465 return_error_line); 3466 3467 { 3468 struct binder_transaction_log_entry *fe; 3469 3470 e->return_error = return_error; 3471 e->return_error_param = return_error_param; 3472 e->return_error_line = return_error_line; 3473 fe = binder_transaction_log_add(&binder_transaction_log_failed); 3474 *fe = *e; 3475 /* 3476 * write barrier to synchronize with initialization 3477 * of log entry 3478 */ 3479 smp_wmb(); 3480 WRITE_ONCE(e->debug_id_done, t_debug_id); 3481 WRITE_ONCE(fe->debug_id_done, t_debug_id); 3482 } 3483 3484 BUG_ON(thread->return_error.cmd != BR_OK); 3485 if (in_reply_to) { 3486 thread->return_error.cmd = BR_TRANSACTION_COMPLETE; 3487 binder_enqueue_thread_work(thread, &thread->return_error.work); 3488 binder_send_failed_reply(in_reply_to, return_error); 3489 } else { 3490 thread->return_error.cmd = return_error; 3491 binder_enqueue_thread_work(thread, &thread->return_error.work); 3492 } 3493 } 3494 -- 0-DAY CI Kernel Test Service https://01.org/lkp