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module: Make module_flags_taint() accept a module's taints bitmap and usable outside core code

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No functional change.

The purpose of this patch is to modify module_flags_taint() to accept
a module's taints bitmap as a parameter and modifies all users
accordingly. Furthermore, it is now possible to access a given
module's taint flags data outside of non-essential code yet does
remain for internal use only.

This is in preparation for module unload taint tracking support.

Signed-off-by: Aaron Tomlin <atomlin@redhat.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
This commit is contained in:
Aaron Tomlin 2022-05-02 21:51:03 +01:00 committed by Luis Chamberlain
parent 80140a81f7
commit c14e522bc7
2 changed files with 5 additions and 4 deletions
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1
kernel/module/internal.h
View File

@ -100,6 +100,7 @@ int cmp_name(const void *name, const void *sym);
long module_get_offset(struct module *mod, unsigned int *size, Elf_Shdr *sechdr,
unsigned int section);
char *module_flags(struct module *mod, char *buf);
size_t module_flags_taint(unsigned long taints, char *buf);
static inline unsigned long kernel_symbol_value(const struct kernel_symbol *sym)
{

8
kernel/module/main.c
View File

@ -890,13 +890,13 @@ static inline int module_unload_init(struct module *mod)
}
#endif /* CONFIG_MODULE_UNLOAD */
static size_t module_flags_taint(struct module *mod, char *buf)
size_t module_flags_taint(unsigned long taints, char *buf)
{
size_t l = 0;
int i;
for (i = 0; i < TAINT_FLAGS_COUNT; i++) {
if (taint_flags[i].module && test_bit(i, &mod->taints))
if (taint_flags[i].module && test_bit(i, &taints))
buf[l++] = taint_flags[i].c_true;
}
@ -974,7 +974,7 @@ static ssize_t show_taint(struct module_attribute *mattr,
{
size_t l;
l = module_flags_taint(mk->mod, buffer);
l = module_flags_taint(mk->mod->taints, buffer);
buffer[l++] = '\n';
return l;
}
@ -2993,7 +2993,7 @@ char *module_flags(struct module *mod, char *buf)
mod->state == MODULE_STATE_GOING ||
mod->state == MODULE_STATE_COMING) {
buf[bx++] = '(';
bx += module_flags_taint(mod, buf + bx);
bx += module_flags_taint(mod->taints, buf + bx);
/* Show a - for module-is-being-unloaded */
if (mod->state == MODULE_STATE_GOING)
buf[bx++] = '-';