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kallsyms, bpf: Move find_kallsyms_symbol_value out of internal header

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Moving find_kallsyms_symbol_value from kernel/module/internal.h to
include/linux/module.h. The reason is that internal.h is not prepared to
be included when CONFIG_MODULES=n. find_kallsyms_symbol_value is used by
kernel/bpf/verifier.c and including internal.h from it (without modules)
leads into a compilation error:

  In file included from ../include/linux/container_of.h:5,
                   from ../include/linux/list.h:5,
                   from ../include/linux/timer.h:5,
                   from ../include/linux/workqueue.h:9,
                   from ../include/linux/bpf.h:10,
                   from ../include/linux/bpf-cgroup.h:5,
                   from ../kernel/bpf/verifier.c:7:
  ../kernel/bpf/../module/internal.h: In function 'mod_find':
  ../include/linux/container_of.h:20:54: error: invalid use of undefined type 'struct module'
     20 |         static_assert(__same_type(*(ptr), ((type *)0)->member) ||       \
        |                                                      ^~
  [...]

This patch fixes the above error.

Fixes: 31bf1dbccf ("bpf: Fix attaching fentry/fexit/fmod_ret/lsm to modules")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Viktor Malik <vmalik@redhat.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/oe-kbuild-all/202303161404.OrmfCy09-lkp@intel.com/
Link: https://lore.kernel.org/bpf/20230317095601.386738-1-vmalik@redhat.com
This commit is contained in:
Viktor Malik
2023-03-17 10:56:01 +01:00
committed by Daniel Borkmann
parent 94bbbdfbde
commit bd5314f8dd
3 changed files with 9 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/linux/module.h
+8
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@@ -616,6 +616,8 @@ int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
/* Look for this name: can be of form module:name. */
unsigned long module_kallsyms_lookup_name(const char *name);
unsigned long find_kallsyms_symbol_value(struct module *mod, const char *name);
extern void __noreturn __module_put_and_kthread_exit(struct module *mod,
long code);
#define module_put_and_kthread_exit(code) __module_put_and_kthread_exit(THIS_MODULE, code)
@@ -796,6 +798,12 @@ static inline unsigned long module_kallsyms_lookup_name(const char *name)
return 0;
}
static inline unsigned long find_kallsyms_symbol_value(struct module *mod,
const char *name)
{
return 0;
}
static inline int register_module_notifier(struct notifier_block *nb)
{
/* no events will happen anyway, so this can always succeed */