Unverified Commit 78b54b0b authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!7274 binder: fix race between mmput() and do_exit() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Guo Mengqi <guomengqi3@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/ORSBW5Z36P5E2VG4ECPQTFOL2GWWY5JF/ 
 
https://gitee.com/src-openeuler/kernel/issues/I99JWJ 
 
Link:https://gitee.com/openeuler/kernel/pulls/7274

 

Reviewed-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
Signed-off-by: default avatarJialin Zhang <zhangjialin11@huawei.com>
parents ee0e1716 8512067d

drivers/android/binder_alloc.c

+2 −2
Original line number Diff line number Diff line
@@ -271,7 +271,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, 
	}

	if (mm) {

		mmap_write_unlock(mm);

		mmput(mm);

		mmput_async(mm);

	}

	return 0;
@@ -304,7 +304,7 @@ static int binder_update_page_range(struct binder_alloc *alloc, int allocate, 
err_no_vma:

	if (mm) {

		mmap_write_unlock(mm);

		mmput(mm);

		mmput_async(mm);

	}

	return vma ? -ENOMEM : -ESRCH;

}