Skip to main content

Browse the archive

Revision a9fc4340aee041dd186d1fb8f1b5d1e9caf28212 authored by Dexuan Cui on 07 May 2019, 07:46:55 UTC, committed by Sasha Levin on 20 August 2019, 16:49:57 UTC 
Drivers: hv: vmbus: Fix virt_to_hvpfn() for X86_PAE
 
In the case of X86_PAE, unsigned long is u32, but the physical address type
should be u64. Due to the bug here, the netvsc driver can not load
successfully, and sometimes the VM can panic due to memory corruption (the
hypervisor writes data to the wrong location).

Fixes: 6ba34171bcbd ("Drivers: hv: vmbus: Remove use of slow_virt_to_phys()")
Cc: stable@vger.kernel.org
Cc: Michael Kelley <mikelley@microsoft.com>
Reported-and-tested-by: Juliana Rodrigueiro <juliana.rodrigueiro@intra2net.com>
Signed-off-by: Dexuan Cui <decui@microsoft.com>
Reviewed-by:  Michael Kelley <mikelley@microsoft.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
1 parent 89eb4d8
Raw File
btnode.h 
/* SPDX-License-Identifier: GPL-2.0+ */
/*
 * btnode.h - NILFS B-tree node cache
 *
 * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
 *
 * Written by Seiji Kihara.
 * Revised by Ryusuke Konishi.
 */

#ifndef _NILFS_BTNODE_H
#define _NILFS_BTNODE_H

#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
#include <linux/backing-dev.h>

/**
 * struct nilfs_btnode_chkey_ctxt - change key context
 * @oldkey: old key of block's moving content
 * @newkey: new key for block's content
 * @bh: buffer head of old buffer
 * @newbh: buffer head of new buffer
 */
struct nilfs_btnode_chkey_ctxt {
	__u64 oldkey;
	__u64 newkey;
	struct buffer_head *bh;
	struct buffer_head *newbh;
};

void nilfs_btnode_cache_clear(struct address_space *);
struct buffer_head *nilfs_btnode_create_block(struct address_space *btnc,
					      __u64 blocknr);
int nilfs_btnode_submit_block(struct address_space *, __u64, sector_t, int,
			      int, struct buffer_head **, sector_t *);
void nilfs_btnode_delete(struct buffer_head *);
int nilfs_btnode_prepare_change_key(struct address_space *,
				    struct nilfs_btnode_chkey_ctxt *);
void nilfs_btnode_commit_change_key(struct address_space *,
				    struct nilfs_btnode_chkey_ctxt *);
void nilfs_btnode_abort_change_key(struct address_space *,
				   struct nilfs_btnode_chkey_ctxt *);

#endif	/* _NILFS_BTNODE_H */
back to top