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Nothing major: support for compressing modules, and auto-tainting params.

Browse source 
Cheers,
 Rusty.
 PS.  My virtio-next tree is empty: DaveM took the patches I had.  There might
      be a virtio-rng starvation fix, but so far it's a bit voodoo so I will
      get to that in the next two days or it will wait.
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Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

Pull module update from Rusty Russell:
 "Nothing major: support for compressing modules, and auto-tainting
  params.

  PS. My virtio-next tree is empty: DaveM took the patches I had.  There
      might be a virtio-rng starvation fix, but so far it's a bit voodoo
      so I will get to that in the next two days or it will wait"

* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
  moduleparam: Resolve missing-field-initializer warning
  kbuild: handle module compression while running 'make modules_install'.
  modinst: wrap long lines in order to enhance cmd_modules_install
  modsign: lookup lines ending in .ko in .mod files
  modpost: simplify file name generation of *.mod.c files
  modpost: reduce visibility of symbols and constify r/o arrays
  param: check for tainting before calling set op.
  drm/i915: taint the kernel if unsafe module parameters are set
  module: add module_param_unsafe and module_param_named_unsafe
  module: make it possible to have unsafe, tainting module params
  module: rename KERNEL_PARAM_FL_NOARG to avoid confusion
This commit is contained in:
Linus Torvalds 2014-10-07 20:17:38 -04:00
commit bdf428feb2
11 changed files with 139 additions and 36 deletions
Download patch file Download diff file Expand all files Collapse all files

2
kernel/module.c
View file

@ -135,7 +135,7 @@ static int param_set_bool_enable_only(const char *val,
}
static const struct kernel_param_ops param_ops_bool_enable_only = {
.flags = KERNEL_PARAM_FL_NOARG,
.flags = KERNEL_PARAM_OPS_FL_NOARG,
.set = param_set_bool_enable_only,
.get = param_get_bool,
};

17
kernel/params.c
View file

@ -83,6 +83,15 @@ bool parameq(const char *a, const char *b)
return parameqn(a, b, strlen(a)+1);
}
static void param_check_unsafe(const struct kernel_param *kp)
{
if (kp->flags & KERNEL_PARAM_FL_UNSAFE) {
pr_warn("Setting dangerous option %s - tainting kernel\n",
kp->name);
add_taint(TAINT_USER, LOCKDEP_STILL_OK);
}
}
static int parse_one(char *param,
char *val,
const char *doing,
@ -104,11 +113,12 @@ static int parse_one(char *param,
return 0;
/* No one handled NULL, so do it here. */
if (!val &&
!(params[i].ops->flags & KERNEL_PARAM_FL_NOARG))
!(params[i].ops->flags & KERNEL_PARAM_OPS_FL_NOARG))
return -EINVAL;
pr_debug("handling %s with %p\n", param,
params[i].ops->set);
mutex_lock(&param_lock);
param_check_unsafe(&params[i]);
err = params[i].ops->set(val, &params[i]);
mutex_unlock(&param_lock);
return err;
@ -318,7 +328,7 @@ int param_get_bool(char *buffer, const struct kernel_param *kp)
EXPORT_SYMBOL(param_get_bool);
struct kernel_param_ops param_ops_bool = {
.flags = KERNEL_PARAM_FL_NOARG,
.flags = KERNEL_PARAM_OPS_FL_NOARG,
.set = param_set_bool,
.get = param_get_bool,
};
@ -369,7 +379,7 @@ int param_set_bint(const char *val, const struct kernel_param *kp)
EXPORT_SYMBOL(param_set_bint);
struct kernel_param_ops param_ops_bint = {
.flags = KERNEL_PARAM_FL_NOARG,
.flags = KERNEL_PARAM_OPS_FL_NOARG,
.set = param_set_bint,
.get = param_get_int,
};
@ -552,6 +562,7 @@ static ssize_t param_attr_store(struct module_attribute *mattr,
return -EPERM;
mutex_lock(&param_lock);
param_check_unsafe(attribute->param);
err = attribute->param->ops->set(buf, attribute->param);
mutex_unlock(&param_lock);
if (!err)