From: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> [ Upstream commit e52dce610a2d53bf2b5e94a8843c71cb73a91ea5 ] Signed-off-by: Konstantin Komarov <almaz.alexandrovich@xxxxxxxxxxxxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> --- fs/ntfs3/super.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c index 055c3764af26e..9d84f66e6a458 100644 --- a/fs/ntfs3/super.c +++ b/fs/ntfs3/super.c @@ -498,7 +498,12 @@ static ssize_t ntfs3_label_write(struct file *file, const char __user *buffer, struct super_block *sb = pde_data(file_inode(file)); struct ntfs_sb_info *sbi = sb->s_fs_info; ssize_t ret = count; - u8 *label = kmalloc(count, GFP_NOFS); + u8 *label; + + if (sb_rdonly(sb)) + return -EROFS; + + label = kmalloc(count, GFP_NOFS); if (!label) return -ENOMEM; -- 2.42.0
