diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-02-07 15:39:12 -0800 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-05-15 14:59:26 -0700 |
| commit | b8a9f9e183229d163d8ace855cbbb63c209fba3c (patch) | |
| tree | bbc939ff827c9ec3220bc5c6177c9964d45cc1e6 /fs/ext2/super.c | |
| parent | f04c6ce2cfaff4b982a6c8ad37e07c14379c111c (diff) | |
userns: Convert ext2 to use kuid/kgid where appropriate.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'fs/ext2/super.c')
| -rw-r--r-- | fs/ext2/super.c | 31 |
1 files changed, 23 insertions, 8 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index e1025c7a437a..38f816071ddb 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -228,13 +228,15 @@ static int ext2_show_options(struct seq_file *seq, struct dentry *root) seq_puts(seq, ",grpid"); if (!test_opt(sb, GRPID) && (def_mount_opts & EXT2_DEFM_BSDGROUPS)) seq_puts(seq, ",nogrpid"); - if (sbi->s_resuid != EXT2_DEF_RESUID || + if (!uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT2_DEF_RESUID)) || le16_to_cpu(es->s_def_resuid) != EXT2_DEF_RESUID) { - seq_printf(seq, ",resuid=%u", sbi->s_resuid); + seq_printf(seq, ",resuid=%u", + from_kuid_munged(&init_user_ns, sbi->s_resuid)); } - if (sbi->s_resgid != EXT2_DEF_RESGID || + if (!gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT2_DEF_RESGID)) || le16_to_cpu(es->s_def_resgid) != EXT2_DEF_RESGID) { - seq_printf(seq, ",resgid=%u", sbi->s_resgid); + seq_printf(seq, ",resgid=%u", + from_kgid_munged(&init_user_ns, sbi->s_resgid)); } if (test_opt(sb, ERRORS_RO)) { int def_errors = le16_to_cpu(es->s_errors); @@ -436,6 +438,8 @@ static int parse_options(char *options, struct super_block *sb) struct ext2_sb_info *sbi = EXT2_SB(sb); substring_t args[MAX_OPT_ARGS]; int option; + kuid_t uid; + kgid_t gid; if (!options) return 1; @@ -462,12 +466,23 @@ static int parse_options(char *options, struct super_block *sb) case Opt_resuid: if (match_int(&args[0], &option)) return 0; - sbi->s_resuid = option; + uid = make_kuid(current_user_ns(), option); + if (!uid_valid(uid)) { + ext2_msg(sb, KERN_ERR, "Invalid uid value %d", option); + return -1; + + } + sbi->s_resuid = uid; break; case Opt_resgid: if (match_int(&args[0], &option)) return 0; - sbi->s_resgid = option; + gid = make_kgid(current_user_ns(), option); + if (!gid_valid(gid)) { + ext2_msg(sb, KERN_ERR, "Invalid gid value %d", option); + return -1; + } + sbi->s_resgid = gid; break; case Opt_sb: /* handled by get_sb_block() instead of here */ @@ -841,8 +856,8 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent) else set_opt(sbi->s_mount_opt, ERRORS_RO); - sbi->s_resuid = le16_to_cpu(es->s_def_resuid); - sbi->s_resgid = le16_to_cpu(es->s_def_resgid); + sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); + sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); set_opt(sbi->s_mount_opt, RESERVATION); |