From: Christian Brauner <brauner@kernel.org> maillist inclusion category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/IAGHK5 CVE: NA Reference: https://lore.kernel.org/linux-unionfs/20240705011510.794025-1-chengzhihao1@h... -------------------------------- So it can be used for parsing the Opt_lowerdir. Signed-off-by: Christian Brauner <brauner@kernel.org> Signed-off-by: Zhihao Cheng <chengzhihao1@huawei.com> Signed-off-by: Zhihao Cheng <chengzhihao@huaweicloud.com> --- fs/overlayfs/params.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) diff --git a/fs/overlayfs/params.c b/fs/overlayfs/params.c index 488f920f79d2..17b9c1838182 100644 --- a/fs/overlayfs/params.c +++ b/fs/overlayfs/params.c @@ -369,10 +369,9 @@ static void ovl_add_layer(struct fs_context *fc, enum ovl_opt layer, } } -static int ovl_parse_layer(struct fs_context *fc, struct fs_parameter *param, - enum ovl_opt layer) +static int ovl_parse_layer(struct fs_context *fc, const char *layer_name, enum ovl_opt layer) { - char *name = kstrdup(param->string, GFP_KERNEL); + char *name = kstrdup(layer_name, GFP_KERNEL); bool upper = (layer == Opt_upperdir || layer == Opt_workdir); struct path path; int err; @@ -586,7 +585,7 @@ static int ovl_parse_param(struct fs_context *fc, struct fs_parameter *param) case Opt_datadir_add: case Opt_upperdir: case Opt_workdir: - err = ovl_parse_layer(fc, param, opt); + err = ovl_parse_layer(fc, param->string, opt); break; case Opt_default_permissions: config->default_permissions = true; -- 2.31.1