diff options
| -rw-r--r-- | security/smack/smack_lsm.c | 114 |
1 files changed, 57 insertions, 57 deletions
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c index b607b1151e30..dba7bc53d86a 100644 --- a/security/smack/smack_lsm.c +++ b/security/smack/smack_lsm.c @@ -629,6 +629,54 @@ static int smack_sb_copy_data(char *orig, char *smackopts) return 0; } +static int smack_add_opt(int token, const char *s, void **mnt_opts) +{ + struct smack_mnt_opts *opts = *mnt_opts; + + if (!opts) { + opts = kzalloc(sizeof(struct smack_mnt_opts), GFP_KERNEL); + if (!opts) + return -ENOMEM; + *mnt_opts = opts; + } + + if (!s) + return -ENOMEM; + + switch (token) { + case Opt_fsdefault: + if (opts->fsdefault) + goto out_opt_err; + opts->fsdefault = s; + break; + case Opt_fsfloor: + if (opts->fsfloor) + goto out_opt_err; + opts->fsfloor = s; + break; + case Opt_fshat: + if (opts->fshat) + goto out_opt_err; + opts->fshat = s; + break; + case Opt_fsroot: + if (opts->fsroot) + goto out_opt_err; + opts->fsroot = s; + break; + case Opt_fstransmute: + if (opts->fstransmute) + goto out_opt_err; + opts->fstransmute = s; + break; + } + return 0; + +out_opt_err: + pr_warn("Smack: duplicate mount options\n"); + return -EINVAL; +} + /** * smack_parse_opts_str - parse Smack specific mount options * @options: mount options string @@ -641,7 +689,6 @@ static int smack_sb_copy_data(char *orig, char *smackopts) static int smack_parse_opts_str(char *options, void **mnt_opts) { - struct smack_mnt_opts *opts = *mnt_opts; char *p; int rc = -ENOMEM; int token; @@ -651,71 +698,24 @@ static int smack_parse_opts_str(char *options, while ((p = strsep(&options, ",")) != NULL) { substring_t args[MAX_OPT_ARGS]; + const char *arg; if (!*p) continue; token = match_token(p, smk_mount_tokens, args); - if (!opts) { - opts = kzalloc(sizeof(struct smack_mnt_opts), GFP_KERNEL); - if (!opts) - return -ENOMEM; - } - - switch (token) { - case Opt_fsdefault: - if (opts->fsdefault) - goto out_opt_err; - opts->fsdefault = match_strdup(&args[0]); - if (!opts->fsdefault) - goto out_err; - break; - case Opt_fsfloor: - if (opts->fsfloor) - goto out_opt_err; - opts->fsfloor = match_strdup(&args[0]); - if (!opts->fsfloor) - goto out_err; - break; - case Opt_fshat: - if (opts->fshat) - goto out_opt_err; - opts->fshat = match_strdup(&args[0]); - if (!opts->fshat) - goto out_err; - break; - case Opt_fsroot: - if (opts->fsroot) - goto out_opt_err; - opts->fsroot = match_strdup(&args[0]); - if (!opts->fsroot) - goto out_err; - break; - case Opt_fstransmute: - if (opts->fstransmute) - goto out_opt_err; - opts->fstransmute = match_strdup(&args[0]); - if (!opts->fstransmute) - goto out_err; - break; - default: - rc = -EINVAL; - pr_warn("Smack: unknown mount option\n"); - goto out_err; + arg = match_strdup(&args[0]); + rc = smack_add_opt(token, arg, mnt_opts); + if (unlikely(rc)) { + kfree(arg); + if (*mnt_opts) + smack_free_mnt_opts(*mnt_opts); + *mnt_opts = NULL; + return rc; } } - *mnt_opts = opts; return 0; - -out_opt_err: - rc = -EINVAL; - pr_warn("Smack: duplicate mount options\n"); - -out_err: - if (opts) - smack_free_mnt_opts(opts); - return rc; } static int smack_sb_eat_lsm_opts(char *options, void **mnt_opts) |