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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 15:18:57 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-09-23 15:18:57 -0700 |
| commit | c82ffab9a857f8286ed2b559624b7005a367b638 (patch) | |
| tree | a5d0895a0b55c2db1bf36f517ca273e7e0abdf71 /kernel/cred.c | |
| parent | a724eada8c2a7b62463b73ccf73fd0bb6e928aeb (diff) | |
| parent | 5224ee086321fec78970e2f2805892d2b34e8957 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/security-testing-2.6:
SELinux: do not destroy the avc_cache_nodep
KEYS: Have the garbage collector set its timer for live expired keys
tpm-fixup-pcrs-sysfs-file-update
creds_are_invalid() needs to be exported for use by modules:
include/linux/cred.h: fix build
Fix trivial BUILD_BUG_ON-induced conflicts in drivers/char/tpm/tpm.c
Diffstat (limited to 'kernel/cred.c')
| -rw-r--r-- | kernel/cred.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/kernel/cred.c b/kernel/cred.c index d7f7a01082e..dd76cfe5f5b 100644 --- a/kernel/cred.c +++ b/kernel/cred.c @@ -782,6 +782,25 @@ EXPORT_SYMBOL(set_create_files_as); #ifdef CONFIG_DEBUG_CREDENTIALS +bool creds_are_invalid(const struct cred *cred) +{ + if (cred->magic != CRED_MAGIC) + return true; + if (atomic_read(&cred->usage) < atomic_read(&cred->subscribers)) + return true; +#ifdef CONFIG_SECURITY_SELINUX + if (selinux_is_enabled()) { + if ((unsigned long) cred->security < PAGE_SIZE) + return true; + if ((*(u32 *)cred->security & 0xffffff00) == + (POISON_FREE << 24 | POISON_FREE << 16 | POISON_FREE << 8)) + return true; + } +#endif + return false; +} +EXPORT_SYMBOL(creds_are_invalid); + /* * dump invalid credentials */ |