diff options
| author | Miklos Szeredi <mszeredi@redhat.com> | 2016-09-16 12:44:20 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-16 17:50:38 +0200 |
| commit | 889995959eb082d515effe001e51bbf2f7324059 (patch) | |
| tree | fa8350326b388ef381dc1e68fc78c5c5c2776662 | |
| parent | 8f730426896bb58cdf670a483451ad388c68a884 (diff) | |
| download | lwn-889995959eb082d515effe001e51bbf2f7324059.tar.gz lwn-889995959eb082d515effe001e51bbf2f7324059.zip | |
ima: use file_dentry()
commit e71b9dff0634edb127f449e076e883ef24a8c76c upstream.
Ima tries to call ->setxattr() on overlayfs dentry after having locked
underlying inode, which results in a deadlock.
Reported-by: Krisztian Litkey <kli@iki.fi>
Fixes: 4bacc9c9234c ("overlayfs: Make f_path always point to the overlay and f_inode to the underlay")
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Cc: Mimi Zohar <zohar@linux.vnet.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | security/integrity/ima/ima_appraise.c | 4 | ||||
| -rw-r--r-- | security/integrity/ima/ima_main.c | 2 |
2 files changed, 3 insertions, 3 deletions
diff --git a/security/integrity/ima/ima_appraise.c b/security/integrity/ima/ima_appraise.c index 1bcbc12e03d9..b5b932c7d1a8 100644 --- a/security/integrity/ima/ima_appraise.c +++ b/security/integrity/ima/ima_appraise.c @@ -190,7 +190,7 @@ int ima_appraise_measurement(enum ima_hooks func, { static const char op[] = "appraise_data"; char *cause = "unknown"; - struct dentry *dentry = file->f_path.dentry; + struct dentry *dentry = file_dentry(file); struct inode *inode = d_backing_inode(dentry); enum integrity_status status = INTEGRITY_UNKNOWN; int rc = xattr_len, hash_start = 0; @@ -295,7 +295,7 @@ out: */ void ima_update_xattr(struct integrity_iint_cache *iint, struct file *file) { - struct dentry *dentry = file->f_path.dentry; + struct dentry *dentry = file_dentry(file); int rc = 0; /* do not collect and update hash for digital signatures */ diff --git a/security/integrity/ima/ima_main.c b/security/integrity/ima/ima_main.c index 68b26c340acd..60ac3aeb5bc6 100644 --- a/security/integrity/ima/ima_main.c +++ b/security/integrity/ima/ima_main.c @@ -222,7 +222,7 @@ static int process_measurement(struct file *file, char *buf, loff_t size, if ((action & IMA_APPRAISE_SUBMASK) || strcmp(template_desc->name, IMA_TEMPLATE_IMA_NAME) != 0) /* read 'security.ima' */ - xattr_len = ima_read_xattr(file->f_path.dentry, &xattr_value); + xattr_len = ima_read_xattr(file_dentry(file), &xattr_value); hash_algo = ima_get_hash_algo(xattr_value, xattr_len); |