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- libpciaccess-0.10.6-rom-sanity.patch: If we hit the /dev/mem path for

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reading a device's ROM, verify that it looks like it at least might
    belong to the device in question by checking vendor and device ID
    match. Fixes vbetool post hanging forever (and thus blocking boot) on
    some dual-gpu laptops.
This commit is contained in:
Adam Jackson 2009-08-05 15:52:45 +00:00
parent 975e140deb
commit 7f6800064f
2 changed files with 51 additions and 1 deletions
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41
libpciaccess-0.10.6-rom-sanity.patch Normal file
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@ -0,0 +1,41 @@
diff -up libpciaccess-0.10.6/src/linux_devmem.c.jx libpciaccess-0.10.6/src/linux_devmem.c
--- libpciaccess-0.10.6/src/linux_devmem.c.jx 2008-10-15 18:35:54.000000000 -0400
+++ libpciaccess-0.10.6/src/linux_devmem.c 2009-08-05 11:43:14.000000000 -0400
@@ -50,6 +50,30 @@
#include "pciaccess_private.h"
#include "linux_devmem.h"
+static int
+rom_sanity_check(struct pci_device *info, void *buffer)
+{
+ unsigned char *bios = buffer;
+ int offset;
+ unsigned short vendor, device;
+
+ if (bios[0] != 0x55 || bios[1] != 0xAA)
+ return 0;
+
+ offset = (bios[0x19] << 8) + bios[0x18];
+
+ if (bios[offset] != 'P' ||
+ bios[offset+1] != 'C' ||
+ bios[offset+2] != 'I' ||
+ bios[offset+3] != 'R')
+ return 0;
+
+ vendor = (bios[offset+5] << 8) + bios[offset+4];
+ device = (bios[offset+7] << 8) + bios[offset+6];
+
+ return (info->vendor_id == vendor) && (info->device_id == device);
+}
+
/**
* Read a device's expansion ROM using /dev/mem.
*
@@ -152,5 +176,5 @@ pci_device_linux_devmem_read_rom(struct
}
}
- return err;
+ return rom_sanity_check(dev, buffer);
}

11
libpciaccess.spec
View File

@ -3,7 +3,7 @@
Name: libpciaccess
Version: 0.10.6
Release: 4%{?dist}
Release: 5%{?dist}
Summary: PCI access library
Group: System Environment/Libraries
@ -21,6 +21,7 @@ Patch0: libpciaccess-fd-cache.patch
Patch2: libpciaccess-rom-size.patch
Patch3: libpciaccess-boot-vga.patch
Patch4: libpciaccess-vga-arbiter.patch
Patch5: libpciaccess-0.10.6-rom-sanity.patch
BuildRequires: autoconf automake libtool pkgconfig xorg-x11-util-macros
Requires: hwdata
@ -44,6 +45,7 @@ Development package for libpciaccess.
%patch2 -p1 -b .rom-size
%patch3 -p1 -b .bootvga
%patch4 -p1 -b .vgaarb
%patch5 -p1 -b .jx
%build
autoreconf -v --install
@ -74,6 +76,13 @@ rm -rf $RPM_BUILD_ROOT
%{_libdir}/pkgconfig/pciaccess.pc
%changelog
* Wed Aug 05 2009 Adam Jackson <ajax@redhat.com> 0.10.6-5
- libpciaccess-0.10.6-rom-sanity.patch: If we hit the /dev/mem path for
reading a device's ROM, verify that it looks like it at least might belong
to the device in question by checking vendor and device ID match. Fixes
vbetool post hanging forever (and thus blocking boot) on some dual-gpu
laptops.
* Mon Aug 03 2009 Dave Airlie <airlied@redhat.com> 0.10.6-4
- Add support for default vga arb device selection
- Update libpciaccess VGA arb code for newer kernel API