diff options
Diffstat (limited to 'fs/binfmt_misc.c')
| -rw-r--r-- | fs/binfmt_misc.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c index 31660d8cc2c6..432fbf4fc334 100644 --- a/fs/binfmt_misc.c +++ b/fs/binfmt_misc.c @@ -247,10 +247,13 @@ static int load_misc_binary(struct linux_binprm *bprm) if (retval < 0) goto ret; - if (fmt->flags & MISC_FMT_OPEN_FILE) + if (fmt->flags & MISC_FMT_OPEN_FILE) { interp_file = file_clone_open(fmt->interp_file); - else + if (!IS_ERR(interp_file)) + deny_write_access(interp_file); + } else { interp_file = open_exec(fmt->interpreter); + } retval = PTR_ERR(interp_file); if (IS_ERR(interp_file)) goto ret; @@ -839,7 +842,7 @@ static ssize_t bm_register_write(struct file *file, const char __user *buffer, } inode_lock(d_inode(root)); - dentry = lookup_one_len(e->name, root, strlen(e->name)); + dentry = lookup_noperm(&QSTR(e->name), root); err = PTR_ERR(dentry); if (IS_ERR(dentry)) goto out; @@ -998,7 +1001,7 @@ static int bm_fill_super(struct super_block *sb, struct fs_context *fc) /* * If it turns out that most user namespaces actually want to * register their own binary type handler and therefore all - * create their own separate binfm_misc mounts we should + * create their own separate binfmt_misc mounts we should * consider turning this into a kmem cache. */ misc = kzalloc(sizeof(struct binfmt_misc), GFP_KERNEL); |