diff options
Diffstat (limited to 'meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0057-Smack-handles-socket-in-file_receive.patch')
| -rw-r--r-- | meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0057-Smack-handles-socket-in-file_receive.patch | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0057-Smack-handles-socket-in-file_receive.patch b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0057-Smack-handles-socket-in-file_receive.patch new file mode 100644 index 0000000..ba02af8 --- /dev/null +++ b/meta-rcar-gen2/recipes-kernel/linux/linux-renesas/smack/0057-Smack-handles-socket-in-file_receive.patch @@ -0,0 +1,61 @@ +From 99719d12de612819e06fc3d0741b7e2da119d61c Mon Sep 17 00:00:00 2001 +From: =?UTF-8?q?Jos=C3=A9=20Bollo?= <jose.bollo@iot.bzh> +Date: Wed, 2 Nov 2016 18:32:32 +0100 +Subject: [PATCH] Smack: handles socket in file_receive +MIME-Version: 1.0 +Content-Type: text/plain; charset=UTF-8 +Content-Transfer-Encoding: 8bit + +The security context of sockets and the rules +of security are differents for sockets. + +This is a backport of http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=79be09350 + +Change-Id: Id520c9ca8f7ee8883523a0e4b40176524442db33 +Signed-off-by: José Bollo <jose.bollo@iot.bzh> +--- + security/smack/smack_lsm.c | 25 +++++++++++++++++++++++++ + 1 file changed, 25 insertions(+) + +diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c +index 94914db..3b09524 100644 +--- a/security/smack/smack_lsm.c ++++ b/security/smack/smack_lsm.c +@@ -1638,9 +1638,34 @@ static int smack_file_receive(struct file *file) + int may = 0; + struct smk_audit_info ad; + struct inode *inode = file_inode(file); ++ struct socket *sock; ++ struct task_smack *tsp; ++ struct socket_smack *ssp; ++ ++ if (unlikely(IS_PRIVATE(inode))) ++ return 0; + + smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH); + smk_ad_setfield_u_fs_path(&ad, file->f_path); ++ ++ if (S_ISSOCK(inode->i_mode)) { ++ sock = SOCKET_I(inode); ++ ssp = sock->sk->sk_security; ++ tsp = current_security(); ++ /* ++ * If the receiving process can't write to the ++ * passed socket or if the passed socket can't ++ * write to the receiving process don't accept ++ * the passed socket. ++ */ ++ rc = smk_access(tsp->smk_task, ssp->smk_out, MAY_WRITE, &ad); ++ rc = smk_bu_file(file, may, rc); ++ if (rc < 0) ++ return rc; ++ rc = smk_access(ssp->smk_in, tsp->smk_task, MAY_WRITE, &ad); ++ rc = smk_bu_file(file, may, rc); ++ return rc; ++ } + /* + * This code relies on bitmasks. + */ +-- +2.7.4 + |