From 79bc79b07c9c6f8ae9290704e9e503a9327fcbb2 Mon Sep 17 00:00:00 2001 From: "pageexec@freemail.hu" Date: Wed, 28 Jun 2006 20:44:16 +0200 Subject: [PATCH] [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 --- arch/i386/kernel/sysenter.c | 10 ++++------ 1 file changed, 4 insertions(+), 6 deletions(-) diff --git a/arch/i386/kernel/sysenter.c b/arch/i386/kernel/sysenter.c index c60419dee018..713ba39d32c6 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) -- GitLab