From: Petr Vorel <pvorel@suse.cz>
To: linux-integrity@vger.kernel.org
Cc: Petr Vorel <pvorel@suse.cz>, Mimi Zohar <zohar@linux.vnet.ibm.com>
Subject: [PATCH] ima: Reflect correct permissions for policy
Date: Fri, 20 Apr 2018 15:28:57 +0200 [thread overview]
Message-ID: <20180420132857.31332-1-pvorel@suse.cz> (raw)
Kernel configured as CONFIG_IMA_READ_POLICY=y && CONFIG_IMA_WRITE_POLICY=n
keeps 0600 mode after loading policy. Remove write permission to state
that policy file no longer be written.
Signed-off-by: Petr Vorel <pvorel@suse.cz>
---
security/integrity/ima/ima_fs.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/security/integrity/ima/ima_fs.c b/security/integrity/ima/ima_fs.c
index fa540c0469da..c1265127d1b6 100644
--- a/security/integrity/ima/ima_fs.c
+++ b/security/integrity/ima/ima_fs.c
@@ -434,6 +434,8 @@ static int ima_release_policy(struct inode *inode, struct file *file)
ima_policy = NULL;
#elif defined(CONFIG_IMA_WRITE_POLICY)
clear_bit(IMA_FS_BUSY, &ima_fs_flags);
+#elif defined(CONFIG_IMA_READ_POLICY)
+ inode->i_mode &= ~S_IWUSR;
#endif
return 0;
}
--
2.12.3
next reply other threads:[~2018-04-20 13:29 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-04-20 13:28 Petr Vorel [this message]
2018-05-07 21:00 ` [PATCH] ima: Reflect correct permissions for policy Mimi Zohar
2018-05-16 21:34 ` Mimi Zohar
2018-05-18 14:45 ` Petr Vorel
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