Patch "hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()" has been added to the 4.7-stable tree

Patch "hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()" has been added to the 4.7-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()

to the 4.7-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     hostfs-freeing-an-err_ptr-in-hostfs_fill_sb_common.patch
and it can be found in the queue-4.7 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 8a545f185145e3c09348cd74326268ecfc6715a3 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@oracle.com>
Date: Wed, 13 Jul 2016 13:12:34 +0300
Subject: hostfs: Freeing an ERR_PTR in hostfs_fill_sb_common()

From: Dan Carpenter <dan.carpenter@oracle.com>

commit 8a545f185145e3c09348cd74326268ecfc6715a3 upstream.

We can't pass error pointers to kfree() or it causes an oops.

Fixes: 52b209f7b848 ('get rid of hostfs_read_inode()')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 fs/hostfs/hostfs_kern.c |    7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -959,10 +959,11 @@ static int hostfs_fill_sb_common(struct
 
 	if (S_ISLNK(root_inode->i_mode)) {
 		char *name = follow_link(host_root_path);
-		if (IS_ERR(name))
+		if (IS_ERR(name)) {
 			err = PTR_ERR(name);
-		else
-			err = read_name(root_inode, name);
+			goto out_put;
+		}
+		err = read_name(root_inode, name);
 		kfree(name);
 		if (err)
 			goto out_put;


Patches currently in stable-queue which might be from dan.carpenter@oracle.com are

queue-4.7/mtd-pmcmsp-flash-allocating-too-much-in-init_msp_flash.patch
queue-4.7/hostfs-freeing-an-err_ptr-in-hostfs_fill_sb_common.patch
queue-4.7/mtd-maps-sa1100-flash-potential-null-dereference.patch
queue-4.7/qxl-check-for-kmap-failures.patch
queue-4.7/power-supply-max17042_battery-fix-model-download-bug.patch