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authorpageexec@freemail.hu <pageexec@freemail.hu>2006-06-28 20:44:16 +0200
committerLinus Torvalds <torvalds@g5.osdl.org>2006-06-28 12:05:50 -0700
commit79bc79b07c9c6f8ae9290704e9e503a9327fcbb2 (patch)
tree1e9b72b18d1605e8ea3fe72f9b992867a4697224 /arch
parenta39727f212426b9d5f9267b3318a2afaf9922d3b (diff)
[PATCH] small fix for not releasing the mmap semaphore in i386/arch_setup_additional_pages
the VDSO randomization code on i386 fails to release the mmap semaphore if insert_vm_struct() fails. [ Made the conditional unlikely. -- Linus ] Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/i386/kernel/sysenter.c10
1 files changed, 4 insertions, 6 deletions
diff --git a/arch/i386/kernel/sysenter.c b/arch/i386/kernel/sysenter.c
index c60419dee01..713ba39d32c 100644
--- a/arch/i386/kernel/sysenter.c
+++ b/arch/i386/kernel/sysenter.c
@@ -148,8 +148,10 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
vma->vm_mm = mm;
ret = insert_vm_struct(mm, vma);
- if (ret)
- goto free_vma;
+ if (unlikely(ret)) {
+ kmem_cache_free(vm_area_cachep, vma);
+ goto up_fail;
+ }
current->mm->context.vdso = (void *)addr;
current_thread_info()->sysenter_return =
@@ -158,10 +160,6 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int exstack)
up_fail:
up_write(&mm->mmap_sem);
return ret;
-
-free_vma:
- kmem_cache_free(vm_area_cachep, vma);
- return ret;
}
const char *arch_vma_name(struct vm_area_struct *vma)