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| author | Hailong Liu <liu.hailong6@zte.com.cn> | 2018-07-20 08:31:56 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-22 07:43:43 +0200 |
| commit | 421483e0c44435475e4a3f8f51037010dfa78620 (patch) | |
| tree | 11dd85e5deaf74ed0594f2d570b5bfeb3b57124e | |
| parent | 1d5fb78f91ae7814f77a32238d5d205390132b26 (diff) | |
| download | linux-421483e0c44435475e4a3f8f51037010dfa78620.tar.gz | |
uio: fix wrong return value from uio_mmap()
commit e7de2590f18a272e63732b9d519250d1b522b2c4 upstream.
uio_mmap has multiple fail paths to set return value to nonzero then
goto out. However, it always returns *0* from the *out* at end, and
this will mislead callers who check the return value of this function.
Fixes: 57c5f4df0a5a0ee ("uio: fix crash after the device is unregistered")
CC: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Hailong Liu <liu.hailong6@zte.com.cn>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Jiang Biao <jiang.biao2@zte.com.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/uio/uio.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/uio/uio.c b/drivers/uio/uio.c index 5d421d7e8904fc..0ddfda28ea95cd 100644 --- a/drivers/uio/uio.c +++ b/drivers/uio/uio.c @@ -814,7 +814,7 @@ static int uio_mmap(struct file *filep, struct vm_area_struct *vma) out: mutex_unlock(&idev->info_lock); - return 0; + return ret; } static const struct file_operations uio_fops = { |