linux-kernel - PATCH: __bprm_mm_init(): remove uneeded goto

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:	Tue, 4 Nov 2008 14:03:14 -0200
From:	"Luiz Fernando N. Capitulino" <lcapitulino@...driva.com.br>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org
Subject: PATCH: __bprm_mm_init(): remove uneeded goto


It is only really used if insert_vm_struct() fails, we can inline it
and drop some (uneeded) lines of code.

Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@...driva.com.br>

---
 fs/exec.c |   16 +++++-----------
 1 file changed, 5 insertions(+), 11 deletions(-)

Index: linux-2.6/fs/exec.c
===================================================================
--- linux-2.6.orig/fs/exec.c
+++ linux-2.6/fs/exec.c
@@ -232,13 +232,13 @@ static void flush_arg_page(struct linux_
 
 static int __bprm_mm_init(struct linux_binprm *bprm)
 {
-	int err = -ENOMEM;
+	int err;
 	struct vm_area_struct *vma = NULL;
 	struct mm_struct *mm = bprm->mm;
 
 	bprm->vma = vma = kmem_cache_zalloc(vm_area_cachep, GFP_KERNEL);
 	if (!vma)
-		goto err;
+		return -ENOMEM;
 
 	down_write(&mm->mmap_sem);
 	vma->vm_mm = mm;
@@ -257,7 +257,9 @@ static int __bprm_mm_init(struct linux_b
 	err = insert_vm_struct(mm, vma);
 	if (err) {
 		up_write(&mm->mmap_sem);
-		goto err;
+		kmem_cache_free(vm_area_cachep, vma);
+		bprm->vma = NULL;
+		return err;
 	}
 
 	mm->stack_vm = mm->total_vm = 1;
@@ -266,14 +268,6 @@ static int __bprm_mm_init(struct linux_b
 	bprm->p = vma->vm_end - sizeof(void *);
 
 	return 0;
-
-err:
-	if (vma) {
-		bprm->vma = NULL;
-		kmem_cache_free(vm_area_cachep, vma);
-	}
-
-	return err;
 }
 
 static bool valid_arg_len(struct linux_binprm *bprm, long len)


-- 
Luiz Fernando N. Capitulino
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/