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authorLorenzo Hernández García-Hierro <lorenzo@gnu.org>2005-06-25 17:54:35 -0400
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-25 19:24:26 -0400
commit09ffd94fb15d85fbf9eebb8180f50264b264d6fe (patch)
tree688a5b60f9718a56a5d4386ef10596e77fb65b7b /security/selinux/include
parent6b9921976f0861e04828b3aff66696c1f3fd900d (diff)
[PATCH] selinux: add executable heap check
This patch,based on sample code by Roland McGrath, adds an execheap permission check that controls the ability to make the heap executable so that this can be prevented in almost all cases (the X server is presently an exception, but this will hopefully be resolved in the future) so that even programs with execmem permission will need to have the anonymous memory mapped in order to make it executable. The only reason that we use a permission check for such restriction (vs. making it unconditional) is that the X module loader presently needs it; it could possibly be made unconditional in the future when X is changed. The policy patch for the execheap permission is available at: http://pearls.tuxedo-es.org/patches/selinux/policy-execheap.patch Signed-off-by: Lorenzo Hernandez Garcia-Hierro <lorenzo@gnu.org> Acked-by: James Morris <jmorris@redhat.com> Acked-by: Stephen Smalley <sds@tycho.nsa.gov> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'security/selinux/include')
-rw-r--r--security/selinux/include/av_perm_to_string.h1
-rw-r--r--security/selinux/include/av_permissions.h1
2 files changed, 2 insertions, 0 deletions
diff --git a/security/selinux/include/av_perm_to_string.h b/security/selinux/include/av_perm_to_string.h
index e81f0226c37d..1deb59e1b762 100644
--- a/security/selinux/include/av_perm_to_string.h
+++ b/security/selinux/include/av_perm_to_string.h
@@ -71,6 +71,7 @@
71 S_(SECCLASS_PROCESS, PROCESS__SETCURRENT, "setcurrent") 71 S_(SECCLASS_PROCESS, PROCESS__SETCURRENT, "setcurrent")
72 S_(SECCLASS_PROCESS, PROCESS__EXECMEM, "execmem") 72 S_(SECCLASS_PROCESS, PROCESS__EXECMEM, "execmem")
73 S_(SECCLASS_PROCESS, PROCESS__EXECSTACK, "execstack") 73 S_(SECCLASS_PROCESS, PROCESS__EXECSTACK, "execstack")
74 S_(SECCLASS_PROCESS, PROCESS__EXECHEAP, "execheap")
74 S_(SECCLASS_MSGQ, MSGQ__ENQUEUE, "enqueue") 75 S_(SECCLASS_MSGQ, MSGQ__ENQUEUE, "enqueue")
75 S_(SECCLASS_MSG, MSG__SEND, "send") 76 S_(SECCLASS_MSG, MSG__SEND, "send")
76 S_(SECCLASS_MSG, MSG__RECEIVE, "receive") 77 S_(SECCLASS_MSG, MSG__RECEIVE, "receive")
diff --git a/security/selinux/include/av_permissions.h b/security/selinux/include/av_permissions.h
index 38ce18b33284..a78b5d59c9fc 100644
--- a/security/selinux/include/av_permissions.h
+++ b/security/selinux/include/av_permissions.h
@@ -466,6 +466,7 @@
466#define PROCESS__SETCURRENT 0x01000000UL 466#define PROCESS__SETCURRENT 0x01000000UL
467#define PROCESS__EXECMEM 0x02000000UL 467#define PROCESS__EXECMEM 0x02000000UL
468#define PROCESS__EXECSTACK 0x04000000UL 468#define PROCESS__EXECSTACK 0x04000000UL
469#define PROCESS__EXECHEAP 0x08000000UL
469 470
470#define IPC__CREATE 0x00000001UL 471#define IPC__CREATE 0x00000001UL
471#define IPC__DESTROY 0x00000002UL 472#define IPC__DESTROY 0x00000002UL