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authorFlorian Weimer <fweimer@redhat.com>2015-10-15 09:23:07 +0200
committerFlorian Weimer <fweimer@redhat.com>2015-10-15 09:23:32 +0200
commita014cecd82b71b70a6a843e250e06b541ad524f7 (patch)
treed402fc41e0212d4feb335c39972752fc5e320d3a /sysdeps
parent0c25f5b5bb48a9d550b5fb403b9a801ba04c146f (diff)
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Always enable pointer guard [BZ #18928]
Honoring the LD_POINTER_GUARD environment variable in AT_SECURE mode
has security implications.  This commit enables pointer guard
unconditionally, and the environment variable is now ignored.

        [BZ #18928]
        * sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Remove
        _dl_pointer_guard member.
        * elf/rtld.c (_rtld_global_ro): Remove _dl_pointer_guard
        initializer.
        (security_init): Always set up pointer guard.
        (process_envvars): Do not process LD_POINTER_GUARD.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/generic/ldsodefs.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index 7f7ff72f88..0625826c3b 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -592,9 +592,6 @@ struct rtld_global_ro
   /* List of auditing interfaces.  */
   struct audit_ifaces *_dl_audit;
   unsigned int _dl_naudit;
-
-  /* 0 if internal pointer values should not be guarded, 1 if they should.  */
-  EXTERN int _dl_pointer_guard;
 };
 # define __rtld_global_attribute__
 # if IS_IN (rtld)