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| author | Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> | 2009-01-06 14:40:44 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-01-06 15:59:11 -0800 |
| commit | eaccbfa564e48c87626594511f42dc8c0ad2daae (patch) | |
| tree | 9a23430bf4f82d4f3d26c9314d0149b14d0fab70 /fs/exec.c | |
| parent | bca1033b092a6fab2ed00036e8a7f6e2df5d99a2 (diff) | |
| download | lwn-eaccbfa564e48c87626594511f42dc8c0ad2daae.tar.gz lwn-eaccbfa564e48c87626594511f42dc8c0ad2daae.zip | |
fs/exec.c:__bprm_mm_init(): clean up error handling
Untangle the error unwinding in this function, saving a test of local
variable `vma'.
Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/exec.c')
| -rw-r--r-- | fs/exec.c | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/fs/exec.c b/fs/exec.c index 9c33f542dc77..6ca4e3d22a3d 100644 --- a/fs/exec.c +++ b/fs/exec.c @@ -232,13 +232,13 @@ static void flush_arg_page(struct linux_binprm *bprm, unsigned long pos, 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; @@ -251,28 +251,20 @@ static int __bprm_mm_init(struct linux_binprm *bprm) */ vma->vm_end = STACK_TOP_MAX; vma->vm_start = vma->vm_end - PAGE_SIZE; - vma->vm_flags = VM_STACK_FLAGS; vma->vm_page_prot = vm_get_page_prot(vma->vm_flags); err = insert_vm_struct(mm, vma); - if (err) { - up_write(&mm->mmap_sem); + if (err) goto err; - } mm->stack_vm = mm->total_vm = 1; up_write(&mm->mmap_sem); - bprm->p = vma->vm_end - sizeof(void *); - return 0; - err: - if (vma) { - bprm->vma = NULL; - kmem_cache_free(vm_area_cachep, vma); - } - + up_write(&mm->mmap_sem); + bprm->vma = NULL; + kmem_cache_free(vm_area_cachep, vma); return err; } |