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Modules updates for v5.10

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Summary of modules changes for the 5.10 merge window:
 
 - Code cleanups. More informative error messages and statically
   initialize init_free_wq to avoid a workqueue warning.
 
 Signed-off-by: Jessica Yu <jeyu@kernel.org>
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Merge tag 'modules-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux

Pull modules updates from Jessica Yu:
 "Code cleanups: more informative error messages and statically
  initialize init_free_wq to avoid a workqueue warning"

* tag 'modules-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  module: statically initialize init section freeing data
  module: Add more error message for failed kernel module loading
This commit is contained in:
Linus Torvalds 2020-10-22 13:08:57 -07:00
commit 2b71482060
1 changed files with 11 additions and 12 deletions
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23
kernel/module.c
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@ -92,8 +92,9 @@ EXPORT_SYMBOL_GPL(module_mutex);
static LIST_HEAD(modules); static LIST_HEAD(modules);
/* Work queue for freeing init sections in success case */ /* Work queue for freeing init sections in success case */
static struct work_struct init_free_wq; static void do_free_init(struct work_struct *w);
static struct llist_head init_free_list; static DECLARE_WORK(init_free_wq, do_free_init);
static LLIST_HEAD(init_free_list);
#ifdef CONFIG_MODULES_TREE_LOOKUP #ifdef CONFIG_MODULES_TREE_LOOKUP
@ -2097,8 +2098,11 @@ static int module_enforce_rwx_sections(Elf_Ehdr *hdr, Elf_Shdr *sechdrs,
int i; int i;
for (i = 0; i < hdr->e_shnum; i++) { for (i = 0; i < hdr->e_shnum; i++) {
if ((sechdrs[i].sh_flags & shf_wx) == shf_wx) if ((sechdrs[i].sh_flags & shf_wx) == shf_wx) {
pr_err("%s: section %s (index %d) has invalid WRITE|EXEC flags\n",
mod->name, secstrings + sechdrs[i].sh_name, i);
return -ENOEXEC; return -ENOEXEC;
}
} }
return 0; return 0;
@ -3591,14 +3595,6 @@ static void do_free_init(struct work_struct *w)
} }
} }
static int __init modules_wq_init(void)
{
INIT_WORK(&init_free_wq, do_free_init);
init_llist_head(&init_free_list);
return 0;
}
module_init(modules_wq_init);
/* /*
* This is where the real work happens. * This is where the real work happens.
* *
@ -3841,8 +3837,10 @@ static int load_module(struct load_info *info, const char __user *uargs,
char *after_dashes; char *after_dashes;
err = elf_header_check(info); err = elf_header_check(info);
if (err) if (err) {
pr_err("Module has invalid ELF header\n");
goto free_copy; goto free_copy;
}
err = setup_load_info(info, flags); err = setup_load_info(info, flags);
if (err) if (err)
@ -3850,6 +3848,7 @@ static int load_module(struct load_info *info, const char __user *uargs,
if (blacklisted(info->name)) { if (blacklisted(info->name)) {
err = -EPERM; err = -EPERM;
pr_err("Module %s is blacklisted\n", info->name);
goto free_copy; goto free_copy;
} }