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61 lines
1.4 KiB
61 lines
1.4 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* Module taint unload tracking support |
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* |
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* Copyright (C) 2022 Aaron Tomlin |
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*/ |
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#include <linux/module.h> |
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#include <linux/string.h> |
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#include <linux/printk.h> |
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#include <linux/slab.h> |
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#include <linux/list.h> |
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#include <linux/rculist.h> |
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#include "internal.h" |
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static LIST_HEAD(unloaded_tainted_modules); |
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int try_add_tainted_module(struct module *mod) |
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{ |
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struct mod_unload_taint *mod_taint; |
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module_assert_mutex_or_preempt(); |
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list_for_each_entry_rcu(mod_taint, &unloaded_tainted_modules, list, |
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lockdep_is_held(&module_mutex)) { |
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if (!strcmp(mod_taint->name, mod->name) && |
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mod_taint->taints & mod->taints) { |
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mod_taint->count++; |
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goto out; |
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} |
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} |
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mod_taint = kmalloc(sizeof(*mod_taint), GFP_KERNEL); |
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if (unlikely(!mod_taint)) |
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return -ENOMEM; |
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strscpy(mod_taint->name, mod->name, MODULE_NAME_LEN); |
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mod_taint->taints = mod->taints; |
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list_add_rcu(&mod_taint->list, &unloaded_tainted_modules); |
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mod_taint->count = 1; |
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out: |
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return 0; |
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} |
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void print_unloaded_tainted_modules(void) |
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{ |
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struct mod_unload_taint *mod_taint; |
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char buf[MODULE_FLAGS_BUF_SIZE]; |
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if (!list_empty(&unloaded_tainted_modules)) { |
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printk(KERN_DEFAULT "Unloaded tainted modules:"); |
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list_for_each_entry_rcu(mod_taint, &unloaded_tainted_modules, |
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list) { |
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size_t l; |
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l = module_flags_taint(mod_taint->taints, buf); |
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buf[l++] = '\0'; |
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pr_cont(" %s(%s):%llu", mod_taint->name, buf, |
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mod_taint->count); |
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} |
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} |
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}
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