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From: Luis Chamberlain <mcgrof@kernel.org>
To: linux-modules@vger.kernel.org, linux-kernel@vger.kernel.org,
	pmladek@suse.com, david@redhat.com, petr.pavlu@suse.com,
	prarit@redhat.com
Cc: christophe.leroy@csgroup.eu, song@kernel.org, mcgrof@kernel.org,
	torvalds@linux-foundation.org
Subject: [RFC 07/12] module: move check_modinfo() early to early_mod_check()
Date: Fri, 10 Mar 2023 21:17:07 -0800	[thread overview]
Message-ID: <20230311051712.4095040-8-mcgrof@kernel.org> (raw)
In-Reply-To: <20230311051712.4095040-1-mcgrof@kernel.org>

This moves check_modinfo() to early_mod_check(). This
doesn't make any functional changes either, as check_modinfo()
was the first call on layout_and_allocate(), so we're just
moving it back one routine and at the end.

This let's us keep separate the checkers from the allocater.

Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
 kernel/module/main.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/kernel/module/main.c b/kernel/module/main.c
index 32c92fb69c05..e9c7eb827f0d 100644
--- a/kernel/module/main.c
+++ b/kernel/module/main.c
@@ -2284,10 +2284,6 @@ static struct module *layout_and_allocate(struct load_info *info, int flags)
 	unsigned int ndx;
 	int err;
 
-	err = check_modinfo(info->mod, info, flags);
-	if (err)
-		return ERR_PTR(err);
-
 	/* Allow arches to frob section contents and sizes.  */
 	err = module_frob_arch_sections(info->hdr, info->sechdrs,
 					info->secstrings, info->mod);
@@ -2702,7 +2698,11 @@ static int early_mod_check(struct load_info *info, int flags)
 
 	/* Check module struct version now, before we try to use module. */
 	if (!check_modstruct_version(info, info->mod))
-		return ENOEXEC;
+		return -ENOEXEC;
+
+	err = check_modinfo(info->mod, info, flags);
+	if (err)
+		return err;
 
 	return 0;
 }
-- 
2.39.1


  parent reply	other threads:[~2023-03-11  5:17 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-11  5:17 [RFC 00/12] module: avoid userspace pressure on unwanted allocations Luis Chamberlain
2023-03-11  5:17 ` [RFC 01/12] module: use goto errors on check_modinfo() and layout_and_allocate() Luis Chamberlain
2023-03-11  5:17 ` [RFC 02/12] module: move get_modinfo() helpers all above Luis Chamberlain
2023-03-11  5:17 ` [RFC 03/12] module: rename next_string() to module_next_tag_pair() Luis Chamberlain
2023-03-11  5:17 ` [RFC 04/12] module: add a for_each_modinfo_entry() Luis Chamberlain
2023-03-11  5:17 ` [RFC 05/12] module: add debugging alias parsing support Luis Chamberlain
2023-03-11  5:17 ` [RFC 06/12] module: move early sanity checks into a helper Luis Chamberlain
2023-03-11  5:17 ` Luis Chamberlain [this message]
2023-03-11  5:17 ` [RFC 08/12] module: move finished_loading() Luis Chamberlain
2023-03-11  5:17 ` [RFC 09/12] module: extract patient module check into helper Luis Chamberlain
2023-03-11  5:17 ` [RFC 10/12] module: avoid allocation if module is already present and ready Luis Chamberlain
2023-03-11  5:17 ` [RFC 11/12] module: use list_add_tail_rcu() when adding module Luis Chamberlain
2023-03-11  5:17 ` [RFC 12/12] module: use aliases to find module on find_module_all() Luis Chamberlain
2023-03-15 14:43   ` Petr Pavlu
2023-03-15 16:12     ` Luis Chamberlain
2023-03-15 12:24 ` [RFC 00/12] module: avoid userspace pressure on unwanted allocations David Hildenbrand
2023-03-15 16:10   ` Luis Chamberlain
2023-03-15 16:41     ` David Hildenbrand
2023-03-16 23:55       ` Luis Chamberlain
2023-03-16 23:56         ` Luis Chamberlain
2023-03-18  0:11           ` Luis Chamberlain
2023-03-20  9:38             ` David Hildenbrand
2023-03-20 19:40               ` David Hildenbrand
2023-03-20 21:09                 ` Luis Chamberlain
2023-03-20 21:15                   ` David Hildenbrand
2023-03-20 21:23                     ` Luis Chamberlain
2023-03-20 21:27                       ` Luis Chamberlain
2023-03-21 19:32                         ` David Hildenbrand
2023-03-24  9:27                           ` David Hildenbrand
2023-03-24 17:54                             ` Luis Chamberlain
2023-03-24 19:11                               ` Linus Torvalds
2023-03-24 19:59                                 ` Luis Chamberlain
2023-03-24 20:28                                   ` Linus Torvalds
2023-03-24 21:14                                     ` Luis Chamberlain
2023-03-24 23:27                                       ` Luis Chamberlain
2023-03-24 23:41                                         ` Linus Torvalds
2023-03-28  3:44                               ` David Hildenbrand
2023-03-28  6:16                                 ` Luis Chamberlain
2023-03-28 21:02                                   ` David Hildenbrand
2023-03-29  5:31                                     ` Luis Chamberlain
2023-03-30  4:42                                       ` David Hildenbrand
2023-03-21 15:11                       ` David Hildenbrand
2023-03-21 16:52                         ` Luis Chamberlain
2023-03-21 17:01                           ` David Hildenbrand
2023-03-20  9:37           ` David Hildenbrand

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