This is a note to let you know that I've just added the patch titled
dmi_scan: fix missing check for _DMI_ signature in smbios_present()
to the 3.4-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:
dmi_scan-fix-missing-check-for-_dmi_-signature-in-smbios_present.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From a40e7cf8f06b4e322ba902e4e9f6a6b0c2daa907 Mon Sep 17 00:00:00 2001
From: Ben Hutchings <[email protected]>
Date: Fri, 8 Mar 2013 12:43:32 -0800
Subject: dmi_scan: fix missing check for _DMI_ signature in smbios_present()
From: Ben Hutchings <[email protected]>
commit a40e7cf8f06b4e322ba902e4e9f6a6b0c2daa907 upstream.
Commit 9f9c9cbb6057 ("drivers/firmware/dmi_scan.c: fetch dmi version
from SMBIOS if it exists") hoisted the check for "_DMI_" into
dmi_scan_machine(), which means that we don't bother to check for
"_DMI_" at offset 16 in an SMBIOS entry. smbios_present() may also call
dmi_present() for an address where we found "_SM_", if it failed further
validation.
Check for "_DMI_" in smbios_present() before calling dmi_present().
[[email protected]: fix build]
Signed-off-by: Ben Hutchings <[email protected]>
Reported-by: Tim McGrath <[email protected]>
Tested-by: Tim Mcgrath <[email protected]>
Cc: Zhenzhong Duan <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
drivers/firmware/dmi_scan.c | 5 ++---
1 file changed, 2 insertions(+), 3 deletions(-)
--- a/drivers/firmware/dmi_scan.c
+++ b/drivers/firmware/dmi_scan.c
@@ -442,7 +442,6 @@ static int __init dmi_present(const char
static int __init smbios_present(const char __iomem *p)
{
u8 buf[32];
- int offset = 0;
memcpy_fromio(buf, p, 32);
if ((buf[5] < 32) && dmi_checksum(buf, buf[5])) {
@@ -461,9 +460,9 @@ static int __init smbios_present(const c
dmi_ver = 0x0206;
break;
}
- offset = 16;
+ return memcmp(p + 16, "_DMI_", 5) || dmi_present(p + 16);
}
- return dmi_present(buf + offset);
+ return 1;
}
void __init dmi_scan_machine(void)
Patches currently in stable-queue which might be from [email protected] are
queue-3.4/dmi_scan-fix-missing-check-for-_dmi_-signature-in-smbios_present.patch
queue-3.4/md-protect-against-crash-upon-fsync-on-ro-array.patch
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