From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 31 Mar 2015 16:30:48 +0000 (-0400)
Subject: acct: check FMODE_CAN_WRITE
X-Git-Tag: firefly_0821_release~176^2~1853^2~70
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=d0f88f8d5da674445f23ace60bb1896f4a3a3783;p=firefly-linux-kernel-4.4.55.git

acct: check FMODE_CAN_WRITE

it's not calling ->write() directly anymore.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/kernel/acct.c b/kernel/acct.c
index e6c10d1a4058..74963d192c5d 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -213,7 +213,7 @@ static int acct_on(struct filename *pathname)
 		return -EACCES;
 	}
 
-	if (!file->f_op->write) {
+	if (!(file->f_mode & FMODE_CAN_WRITE)) {
 		kfree(acct);
 		filp_close(file, NULL);
 		return -EIO;