Re: [PATCH] ntfs: mount hibernated volumes read-only regardless of errors=

[liubaolin <liubaolin12138@163.com>]

在 2026/9/14 11:42, Hongling Zeng 写道:
> The hibernation check in load_system_files() only converts the
> superblock to read-only under errors=remount-ro.  With the default
> errors=continue (and with errors=panic), a hibernated volume is
> mounted read-write and the mount-time $LogFile emptying writes to it,
> although a hibernated volume must not be written to at all.
> 
> Drop the on_errors term so that a hibernated volume, or a volume whose
> hibernation state cannot be determined, always mounts read-only.
> NVolErrors() is still recorded, so ntfs_reconfigure() keeps refusing
> remounts to read-write, and the $LogFile emptying is skipped by its
> !sb_rdonly() check.
> 
> Cc: stable@vger.kernel.org
> Signed-off-by: Hongling Zeng <zenghongling@kylinos.cn>
> ---
>   fs/ntfs/super.c | 9 +++++++--
>   1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
> index 2d4132aa39d3..fd7e5dbd1115 100644
> --- a/fs/ntfs/super.c
> +++ b/fs/ntfs/super.c
> @@ -1660,8 +1660,13 @@ static bool load_system_files(struct ntfs_volume *vol)
>   		const char *es1;
>   
>   		es1 = err < 0 ? es1a : es1b;
> -		/* If a read-write mount, convert it to a read-only mount. */
> -		if (!sb_rdonly(sb) && vol->on_errors == ON_ERRORS_REMOUNT_RO) {
> +		/*
> +		 * A Windows hibernation image is not a filesystem error, so
> +		 * this is a safety interlock rather than something the
> +		 * errors= policy may downgrade: always convert a read-write
> +		 * mount to read-only.
> +		 */
> +		if (!sb_rdonly(sb)) {
>   			sb->s_flags |= SB_RDONLY;
>   			ntfs_error(sb, "%s.  Mounting read-only%s", es1, es2);
>   		}

Looks good to me.

Reviewed-by: Baolin Liu <liubaolin@kylinos.cn>