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| author | Mimi Zohar <zohar@linux.vnet.ibm.com> | 2010-08-31 09:38:51 -0400 |
|---|---|---|
| committer | James Morris <jmorris@namei.org> | 2010-09-08 09:51:41 +1000 |
| commit | e950598d43dce8d97e7d5270808393425d1e5cbd (patch) | |
| tree | 916c8a6c5dc63cd3486aa7200964269ea31b4d42 | |
| parent | 999b4f0aa2314b76857775334cb94bafa053db64 (diff) | |
| download | lwn-e950598d43dce8d97e7d5270808393425d1e5cbd.tar.gz lwn-e950598d43dce8d97e7d5270808393425d1e5cbd.zip | |
ima: always maintain counters
commit 8262bb85da allocated the inode integrity struct (iint) before any
inodes were created. Only after IMA was initialized in late_initcall were
the counters updated. This patch updates the counters, whether or not IMA
has been initialized, to resolve 'imbalance' messages.
This patch fixes the bug as reported in bugzilla: 15673. When the i915
is builtin, the ring_buffer is initialized before IMA, causing the
imbalance message on suspend.
Reported-by: Thomas Meyer <thomas@m3y3r.de>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
Tested-by: Thomas Meyer <thomas@m3y3r.de>
Tested-by: David Safford<safford@watson.ibm.com>
Cc: Stable Kernel <stable@kernel.org>
Signed-off-by: James Morris <jmorris@namei.org>
| -rw-r--r-- | security/integrity/ima/ima.h | 1 | ||||
| -rw-r--r-- | security/integrity/ima/ima_iint.c | 4 | ||||
| -rw-r--r-- | security/integrity/ima/ima_main.c | 8 |
3 files changed, 9 insertions, 4 deletions
diff --git a/security/integrity/ima/ima.h b/security/integrity/ima/ima.h index 16d100d3fc38..3fbcd1dda0ef 100644 --- a/security/integrity/ima/ima.h +++ b/security/integrity/ima/ima.h @@ -35,6 +35,7 @@ enum tpm_pcrs { TPM_PCR0 = 0, TPM_PCR8 = 8 }; #define IMA_MEASURE_HTABLE_SIZE (1 << IMA_HASH_BITS) /* set during initialization */ +extern int iint_initialized; extern int ima_initialized; extern int ima_used_chip; extern char *ima_hash; diff --git a/security/integrity/ima/ima_iint.c b/security/integrity/ima/ima_iint.c index 7625b85c2274..afba4aef812f 100644 --- a/security/integrity/ima/ima_iint.c +++ b/security/integrity/ima/ima_iint.c @@ -22,9 +22,10 @@ RADIX_TREE(ima_iint_store, GFP_ATOMIC); DEFINE_SPINLOCK(ima_iint_lock); - static struct kmem_cache *iint_cache __read_mostly; +int iint_initialized = 0; + /* ima_iint_find_get - return the iint associated with an inode * * ima_iint_find_get gets a reference to the iint. Caller must @@ -141,6 +142,7 @@ static int __init ima_iintcache_init(void) iint_cache = kmem_cache_create("iint_cache", sizeof(struct ima_iint_cache), 0, SLAB_PANIC, init_once); + iint_initialized = 1; return 0; } security_initcall(ima_iintcache_init); diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index f93641382e9f..e662b89d4079 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -148,12 +148,14 @@ void ima_counts_get(struct file *file) struct ima_iint_cache *iint; int rc; - if (!ima_initialized || !S_ISREG(inode->i_mode)) + if (!iint_initialized || !S_ISREG(inode->i_mode)) return; iint = ima_iint_find_get(inode); if (!iint) return; mutex_lock(&iint->mutex); + if (!ima_initialized) + goto out; rc = ima_must_measure(iint, inode, MAY_READ, FILE_CHECK); if (rc < 0) goto out; @@ -213,7 +215,7 @@ void ima_file_free(struct file *file) struct inode *inode = file->f_dentry->d_inode; struct ima_iint_cache *iint; - if (!ima_initialized || !S_ISREG(inode->i_mode)) + if (!iint_initialized || !S_ISREG(inode->i_mode)) return; iint = ima_iint_find_get(inode); if (!iint) @@ -230,7 +232,7 @@ static int process_measurement(struct file *file, const unsigned char *filename, { struct inode *inode = file->f_dentry->d_inode; struct ima_iint_cache *iint; - int rc; + int rc = 0; if (!ima_initialized || !S_ISREG(inode->i_mode)) return 0; |