linux-kernel - [ 10/68] watchdog: hpwdt: clean up set_memory

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20120309190215.797777665@linuxfoundation.org>
Date:	Fri, 09 Mar 2012 11:02:24 -0800
From:	Greg KH <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:	torvalds@...ux-foundation.org, akpm@...ux-foundation.org,
	alan@...rguk.ukuu.org.uk, Maxim Uvarov <maxim.uvarov@...cle.com>,
	Wim Van Sebroeck <wim@...ana.be>
Subject: [ 10/68] watchdog: hpwdt: clean up set_memory_x call for 32 bit

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Maxim Uvarov <maxim.uvarov@...cle.com>

commit 97d2a10d5804d585ab0b58efbd710948401b886a upstream.

1. address has to be page aligned.
2. set_memory_x uses page size argument, not size.
Bug causes with following commit:
	commit da28179b4e90dda56912ee825c7eaa62fc103797
	Author: Mingarelli, Thomas <Thomas.Mingarelli@...com>
	Date:   Mon Nov 7 10:59:00 2011 +0100

     watchdog: hpwdt: Changes to handle NX secure bit in 32bit path

    commit e67d668e147c3b4fec638c9e0ace04319f5ceccd upstream.

    This patch makes use of the set_memory_x() kernel API in order
    to make necessary BIOS calls to source NMIs.

Signed-off-by: Maxim Uvarov <maxim.uvarov@...cle.com>
Signed-off-by: Wim Van Sebroeck <wim@...ana.be>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/watchdog/hpwdt.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/drivers/watchdog/hpwdt.c
+++ b/drivers/watchdog/hpwdt.c
@@ -216,7 +216,7 @@ static int __devinit cru_detect(unsigned
 
 	cmn_regs.u1.reax = CRU_BIOS_SIGNATURE_VALUE;
 
-	set_memory_x((unsigned long)bios32_entrypoint, (2 * PAGE_SIZE));
+	set_memory_x((unsigned long)bios32_map, 2);
 	asminline_call(&cmn_regs, bios32_entrypoint);
 
 	if (cmn_regs.u1.ral != 0) {
@@ -235,7 +235,8 @@ static int __devinit cru_detect(unsigned
 			cru_rom_addr =
 				ioremap(cru_physical_address, cru_length);
 			if (cru_rom_addr) {
-				set_memory_x((unsigned long)cru_rom_addr, cru_length);
+				set_memory_x((unsigned long)cru_rom_addr & PAGE_MASK,
+					(cru_length + PAGE_SIZE - 1) >> PAGE_SHIFT);
 				retval = 0;
 			}
 		}


--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/