45e5421eb5
Add more validity checks at policy load time to reject malformed policies and prevent subsequent out-of-range indexing when in permissive mode. Resolves the NULL pointer dereference reported in https://bugzilla.redhat.com/show_bug.cgi?id=357541. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: James Morris <jmorris@namei.org>
88 lines
2.4 KiB
C
88 lines
2.4 KiB
C
/*
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* Multi-level security (MLS) policy operations.
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*
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* Author : Stephen Smalley, <sds@epoch.ncsc.mil>
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*/
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/*
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* Updated: Trusted Computer Solutions, Inc. <dgoeddel@trustedcs.com>
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*
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* Support for enhanced MLS infrastructure.
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*
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* Copyright (C) 2004-2006 Trusted Computer Solutions, Inc.
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*/
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/*
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* Updated: Hewlett-Packard <paul.moore@hp.com>
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*
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* Added support to import/export the MLS label from NetLabel
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*
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* (c) Copyright Hewlett-Packard Development Company, L.P., 2006
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*/
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#ifndef _SS_MLS_H_
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#define _SS_MLS_H_
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#include "context.h"
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#include "policydb.h"
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int mls_compute_context_len(struct context *context);
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void mls_sid_to_context(struct context *context, char **scontext);
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int mls_context_isvalid(struct policydb *p, struct context *c);
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int mls_range_isvalid(struct policydb *p, struct mls_range *r);
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int mls_level_isvalid(struct policydb *p, struct mls_level *l);
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int mls_context_to_sid(char oldc,
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char **scontext,
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struct context *context,
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struct sidtab *s,
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u32 def_sid);
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int mls_from_string(char *str, struct context *context, gfp_t gfp_mask);
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int mls_convert_context(struct policydb *oldp,
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struct policydb *newp,
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struct context *context);
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int mls_compute_sid(struct context *scontext,
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struct context *tcontext,
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u16 tclass,
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u32 specified,
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struct context *newcontext);
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int mls_setup_user_range(struct context *fromcon, struct user_datum *user,
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struct context *usercon);
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#ifdef CONFIG_NETLABEL
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void mls_export_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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void mls_import_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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int mls_export_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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int mls_import_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr);
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#else
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static inline void mls_export_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return;
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}
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static inline void mls_import_netlbl_lvl(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return;
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}
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static inline int mls_export_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return -ENOMEM;
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}
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static inline int mls_import_netlbl_cat(struct context *context,
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struct netlbl_lsm_secattr *secattr)
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{
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return -ENOMEM;
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}
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#endif
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#endif /* _SS_MLS_H */
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