Re: [PATCH v4] fs: fix memory access via /dev/mem for MIPS64

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Hi Peter,

On Thu, May 24, 2018 at 05:01:33PM +0300, Peter Mamonov wrote:
> lseek checks for non-negative in-memory offsets (addresses), failing otherwise.
> However negative address 0xffffffffXXXXXXXX is a valid MIPS64 virtual address.
> ---
>  fs/fs.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)

The patch looks good now, but lacks a Signed-off-by: Could you resend
it?

Sascha

> 
> diff --git a/fs/fs.c b/fs/fs.c
> index b66cc9b17..8a49e32b5 100644
> --- a/fs/fs.c
> +++ b/fs/fs.c
> @@ -962,7 +962,7 @@ loff_t lseek(int fildes, loff_t offset, int whence)
>  	case SEEK_SET:
>  		if (f->size != FILE_SIZE_STREAM && offset > f->size)
>  			goto out;
> -		if (offset < 0)
> +		if (IS_ERR_VALUE(offset))
>  			goto out;
>  		pos = offset;
>  		break;
> @@ -981,7 +981,7 @@ loff_t lseek(int fildes, loff_t offset, int whence)
>  	}
>  
>  	pos = fsdrv->lseek(&f->fsdev->dev, f, pos);
> -	if (pos < 0) {
> +	if (IS_ERR_VALUE(pos)) {
>  		errno = -pos;
>  		return -1;
>  	}
> -- 
> 2.17.0
> 
> 

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