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Fix race between cat /proc/slab_allocators and rmmod

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Same story as with cat /proc/*/wchan race vs rmmod race, only
/proc/slab_allocators want more info than just symbol name.

Signed-off-by: Alexey Dobriyan <adobriyan@sw.ru>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexey Dobriyan 2007-05-08 00:28:47 -07:00 • committed by Linus Torvalds
parent 9d65cb4a17
commit a5c43dae7a
5 changed files with 61 additions and 7 deletions
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27
kernel/module.c
View file

@ -2149,6 +2149,33 @@ out:
return -ERANGE;
}
int lookup_module_symbol_attrs(unsigned long addr, unsigned long *size,
unsigned long *offset, char *modname, char *name)
{
struct module *mod;
mutex_lock(&module_mutex);
list_for_each_entry(mod, &modules, list) {
if (within(addr, mod->module_init, mod->init_size) ||
within(addr, mod->module_core, mod->core_size)) {
const char *sym;
sym = get_ksymbol(mod, addr, size, offset);
if (!sym)
goto out;
if (modname)
strlcpy(modname, mod->name, MODULE_NAME_LEN + 1);
if (name)
strlcpy(name, sym, KSYM_NAME_LEN + 1);
mutex_unlock(&module_mutex);
return 0;
}
}
out:
mutex_unlock(&module_mutex);
return -ERANGE;
}
int module_get_kallsym(unsigned int symnum, unsigned long *value, char *type,
char *name, char *module_name, int *exported)
{