diff options
Diffstat (limited to 'fs/fuse/inode.c')
| -rw-r--r-- | fs/fuse/inode.c | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c index 99e44ea7d8..32fe6fa72f 100644 --- a/fs/fuse/inode.c +++ b/fs/fuse/inode.c @@ -755,6 +755,8 @@ static int fuse_parse_param(struct fs_context *fsc, struct fs_parameter *param) struct fs_parse_result result; struct fuse_fs_context *ctx = fsc->fs_private; int opt; + kuid_t kuid; + kgid_t kgid; if (fsc->purpose == FS_CONTEXT_FOR_RECONFIGURE) { /* @@ -799,16 +801,30 @@ static int fuse_parse_param(struct fs_context *fsc, struct fs_parameter *param) break; case OPT_USER_ID: - ctx->user_id = make_kuid(fsc->user_ns, result.uint_32); - if (!uid_valid(ctx->user_id)) + kuid = make_kuid(fsc->user_ns, result.uint_32); + if (!uid_valid(kuid)) return invalfc(fsc, "Invalid user_id"); + /* + * The requested uid must be representable in the + * filesystem's idmapping. + */ + if (!kuid_has_mapping(fsc->user_ns, kuid)) + return invalfc(fsc, "Invalid user_id"); + ctx->user_id = kuid; ctx->user_id_present = true; break; case OPT_GROUP_ID: - ctx->group_id = make_kgid(fsc->user_ns, result.uint_32); - if (!gid_valid(ctx->group_id)) + kgid = make_kgid(fsc->user_ns, result.uint_32);; + if (!gid_valid(kgid)) + return invalfc(fsc, "Invalid group_id"); + /* + * The requested gid must be representable in the + * filesystem's idmapping. + */ + if (!kgid_has_mapping(fsc->user_ns, kgid)) return invalfc(fsc, "Invalid group_id"); + ctx->group_id = kgid; ctx->group_id_present = true; break; |