Skip to main content

Browse the archive

Revision 070e76cb3ffe43f6855492e77c96680c562598f0 authored by Leonid Yegoshin on 27 November 2014, 11:13:08 UTC, committed by Ralf Baechle on 27 November 2014, 16:21:56 UTC 
MIPS: tlbex: Fix potential HTW race on TLBL/M/S handlers
 
There is a potential race when probing the TLB in TLBL/M/S exception
handlers for a matching entry. Between the time we hit a TLBL/S/M
exception and the time we get to execute the TLBP instruction, the
HTW may have replaced the TLB entry we are interested in hence the TLB
probe may fail. However, in the existing handlers, we never checked the
status of the TLBP (ie check the result in the C0/Index register). We
fix this by adding such a check when the core implements the HTW. If
we couldn't find a matching entry, we return back and try again.

Signed-off-by: Leonid Yegoshin <Leonid.Yegoshin@imgtec.com>
Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Cc: <stable@vger.kernel.org> # v3.17+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/8599/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
1 parent b4da18b
Raw File
inet6_connection_sock.h 
/*
 * NET		Generic infrastructure for INET6 connection oriented protocols.
 *
 * Authors:	Many people, see the TCPv6 sources
 *
 * 		From code originally in TCPv6
 *
 *		This program is free software; you can redistribute it and/or
 *		modify it under the terms of the GNU General Public License
 *		as published by the Free Software Foundation; either version
 *		2 of the License, or (at your option) any later version.
 */
#ifndef _INET6_CONNECTION_SOCK_H
#define _INET6_CONNECTION_SOCK_H

#include <linux/types.h>

struct in6_addr;
struct inet_bind_bucket;
struct request_sock;
struct sk_buff;
struct sock;
struct sockaddr;

int inet6_csk_bind_conflict(const struct sock *sk,
			    const struct inet_bind_bucket *tb, bool relax);

struct dst_entry *inet6_csk_route_req(struct sock *sk, struct flowi6 *fl6,
				      const struct request_sock *req);

struct request_sock *inet6_csk_search_req(const struct sock *sk,
					  struct request_sock ***prevp,
					  const __be16 rport,
					  const struct in6_addr *raddr,
					  const struct in6_addr *laddr,
					  const int iif);

void inet6_csk_reqsk_queue_hash_add(struct sock *sk, struct request_sock *req,
				    const unsigned long timeout);

void inet6_csk_addr2sockaddr(struct sock *sk, struct sockaddr *uaddr);

int inet6_csk_xmit(struct sock *sk, struct sk_buff *skb, struct flowi *fl);

struct dst_entry *inet6_csk_update_pmtu(struct sock *sk, u32 mtu);
#endif /* _INET6_CONNECTION_SOCK_H */
back to top