Jan Engelhardt
6dbc03955a
OBS-URL: https://build.opensuse.org/package/show/Base:System/kmod?expand=0&rev=77
109 lines
3.3 KiB
Diff
109 lines
3.3 KiB
Diff
From 153da67042852b7667ce4479d14835450c908417 Mon Sep 17 00:00:00 2001
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From: Michal Marek <mmarek@suse.cz>
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Date: Wed, 5 Mar 2014 14:40:14 +0100
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Subject: [PATCH 3/5] libkmod: Implement filtering of unsupported modules (off
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by default)
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References: fate#316971
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Patch-mainline: never
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---
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libkmod/libkmod-config.c | 12 ++++++++++--
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libkmod/libkmod-internal.h | 1 +
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libkmod/libkmod-module.c | 31 +++++++++++++++++++++++++++++++
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3 files changed, 42 insertions(+), 2 deletions(-)
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diff --git a/libkmod/libkmod-config.c b/libkmod/libkmod-config.c
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index 79bfb9b..9f47cfd 100644
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--- a/libkmod/libkmod-config.c
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+++ b/libkmod/libkmod-config.c
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@@ -668,8 +668,16 @@ static int kmod_config_parse(struct kmod_config *config, int fd,
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ERR(ctx, "%s: command %s is deprecated and not parsed anymore\n",
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filename, cmd);
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} else if (streq(cmd, "allow_unsupported_modules")) {
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- /* dummy option for now */
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- ;
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+ char *param = strtok_r(NULL, "\t ", &saveptr);
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+
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+ if (param == NULL)
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+ goto syntax_error;
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+ if (streq(param, "yes") || streq(param, "1"))
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+ config->block_unsupported = 0;
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+ else if (streq(param, "no") || streq(param, "0"))
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+ config->block_unsupported = 1;
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+ else
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+ goto syntax_error;
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} else {
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syntax_error:
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ERR(ctx, "%s line %u: ignoring bad line starting with '%s'\n",
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diff --git a/libkmod/libkmod-internal.h b/libkmod/libkmod-internal.h
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index 93a00c1..3a46b6b 100644
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--- a/libkmod/libkmod-internal.h
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+++ b/libkmod/libkmod-internal.h
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@@ -119,6 +119,7 @@ struct kmod_config {
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struct kmod_list *softdeps;
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struct kmod_list *paths;
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+ int block_unsupported;
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};
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int kmod_config_new(struct kmod_ctx *ctx, struct kmod_config **config, const char * const *config_paths) __attribute__((nonnull(1, 2,3)));
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diff --git a/libkmod/libkmod-module.c b/libkmod/libkmod-module.c
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index e3cc5a7..3a9ce7c 100644
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--- a/libkmod/libkmod-module.c
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+++ b/libkmod/libkmod-module.c
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@@ -782,6 +782,24 @@ KMOD_EXPORT int kmod_module_remove_module(struct kmod_module *mod,
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extern long init_module(const void *mem, unsigned long len, const char *args);
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+static int check_module_supported(struct kmod_module *mod)
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+{
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+ char **strings;
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+ int i, count;
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+ struct kmod_elf *elf;
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+
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+ elf = kmod_file_get_elf(mod->file);
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+ count = kmod_elf_get_strings(elf, ".modinfo", &strings);
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+ if (count < 0)
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+ return count;
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+ for (i = 0; i < count; i++)
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+ if (streq(strings[i], "supported=yes") ||
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+ streq(strings[i], "supported=external")) {
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+ return 1;
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+ }
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+ return 0;
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+}
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+
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/**
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* kmod_module_insert_module:
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* @mod: kmod module
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@@ -807,6 +825,7 @@ KMOD_EXPORT int kmod_module_insert_module(struct kmod_module *mod,
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struct kmod_elf *elf;
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const char *path;
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const char *args = options ? options : "";
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+ const struct kmod_config *config = kmod_get_config(mod->ctx);
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if (mod == NULL)
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return -ENOENT;
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@@ -823,6 +842,18 @@ KMOD_EXPORT int kmod_module_insert_module(struct kmod_module *mod,
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return err;
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}
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+ if (config->block_unsupported) {
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+ err = check_module_supported(mod);
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+ if (err < 0)
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+ return err;
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+ else if (err == 0) {
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+ ERR(mod->ctx, "module '%s' is unsupported\n", mod->name);
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+ ERR(mod->ctx, "Use --allow-unsupported or set allow_unsupported_modules 1 in\n");
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+ ERR(mod->ctx, "/etc/modprobe.d/10-unsupported-modules.conf\n");
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+ return -EPERM;
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+ }
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+ }
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+
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if (kmod_file_get_direct(mod->file)) {
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unsigned int kernel_flags = 0;
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--
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1.8.4.5
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