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audit: treat s_id as an untrusted string

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The use of s_id should go through the untrusted string path, just to be
extra careful.

Signed-off-by: Kees Cook <keescook@chromium.org>
Acked-by: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: Eric Paris <eparis@redhat.com>
This commit is contained in:
Kees Cook
2012-01-07 10:41:04 -08:00
committed by Al Viro
parent 5afb8a3f96
commit 41fdc3054e
2 changed files with 18 additions and 13 deletions
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23
security/lsm_audit.c
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@@ -235,10 +235,11 @@ static void dump_common_audit_data(struct audit_buffer *ab,
audit_log_d_path(ab, "path=", &a->u.path);
inode = a->u.path.dentry->d_inode;
if (inode)
audit_log_format(ab, " dev=%s ino=%lu",
inode->i_sb->s_id,
inode->i_ino);
if (inode) {
audit_log_format(ab, " dev=");
audit_log_untrustedstring(ab, inode->i_sb->s_id);
audit_log_format(ab, " ino=%lu", inode->i_ino);
}
break;
}
case LSM_AUDIT_DATA_DENTRY: {
@@ -248,10 +249,11 @@ static void dump_common_audit_data(struct audit_buffer *ab,
audit_log_untrustedstring(ab, a->u.dentry->d_name.name);
inode = a->u.dentry->d_inode;
if (inode)
audit_log_format(ab, " dev=%s ino=%lu",
inode->i_sb->s_id,
inode->i_ino);
if (inode) {
audit_log_format(ab, " dev=");
audit_log_untrustedstring(ab, inode->i_sb->s_id);
audit_log_format(ab, " ino=%lu", inode->i_ino);
}
break;
}
case LSM_AUDIT_DATA_INODE: {
@@ -266,8 +268,9 @@ static void dump_common_audit_data(struct audit_buffer *ab,
dentry->d_name.name);
dput(dentry);
}
audit_log_format(ab, " dev=%s ino=%lu", inode->i_sb->s_id,
inode->i_ino);
audit_log_format(ab, " dev=");
audit_log_untrustedstring(ab, inode->i_sb->s_id);
audit_log_format(ab, " ino=%lu", inode->i_ino);
break;
}
case LSM_AUDIT_DATA_TASK: