linux-kernel - [PATCH 1/3] module: use goto errors on check_modinfo() and layout_and

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Date:   Wed, 29 Nov 2017 18:36:03 -0800
From:   "Luis R. Rodriguez" <mcgrof@...nel.org>
To:     jeyu@...hat.com, rusty@...tcorp.com.au
Cc:     keescook@...omium.org, tixxdz@...il.com, mbenes@...e.cz,
        atomlin@...hat.com, pmladek@...e.com, hare@...e.com,
        james.l.morris@...cle.com, ebiederm@...ssion.com,
        davem@...emloft.net, akpm@...ux-foundation.org,
        torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
        "Luis R. Rodriguez" <mcgrof@...nel.org>
Subject: [PATCH 1/3] module: use goto errors on check_modinfo() and layout_and_allocate()

Although both routines don't have much complex errors paths we
will expand on these routine in the future, setting up error lables
now for both will make subsequent changes easier to review. This
changes has no functional changes.

Signed-off-by: Luis R. Rodriguez <mcgrof@...nel.org>
---
 kernel/module.c | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/kernel/module.c b/kernel/module.c
index 3e1c1e217e3f..bb595dc87651 100644
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -3037,12 +3037,14 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags)
 
 	err = check_modinfo_livepatch(mod, info);
 	if (err)
-		return err;
+		goto err_out;
 
 	/* Set up license info based on the info section */
 	set_license(mod, get_modinfo(info, "license"));
 
 	return 0;
+err_out:
+	return err;
 }
 
 static int find_module_sections(struct module *mod, struct load_info *info)
@@ -3313,7 +3315,7 @@ static struct module *layout_and_allocate(struct load_info *info, int flags)
 	err = module_frob_arch_sections(info->hdr, info->sechdrs,
 					info->secstrings, mod);
 	if (err < 0)
-		return ERR_PTR(err);
+		goto err_out;
 
 	/* We will do a special allocation for per-cpu sections later. */
 	info->sechdrs[info->index.pcpu].sh_flags &= ~(unsigned long)SHF_ALLOC;
@@ -3336,12 +3338,14 @@ static struct module *layout_and_allocate(struct load_info *info, int flags)
 	/* Allocate and move to the final place */
 	err = move_module(mod, info);
 	if (err)
-		return ERR_PTR(err);
+		goto err_out;
 
 	/* Module has been copied to its final place now: return it. */
 	mod = (void *)info->sechdrs[info->index.mod].sh_addr;
 	kmemleak_load_module(mod, info);
 	return mod;
+err_out:
+	return ERR_PTR(err);
 }
 
 /* mod is no longer valid after this! */
-- 
2.15.0