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Linux v4.10-rc4

This commit is contained in:
Justin M. Forbes 2017-01-16 10:06:57 -06:00
parent cf4759fc3f
commit 411d3b79f7
5 changed files with 9 additions and 153 deletions
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141
0001-efi-prune-invalid-memory-map-entries.patch
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@ -1,141 +0,0 @@
From c7c7030a020405d5826c03839e38986e0f78f2ea Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Tue, 13 Dec 2016 10:25:10 +0000
Subject: [PATCH] efi: prune invalid memory map entries
Some machines, such as the Lenovo ThinkPad W541 with firmware GNET80WW
(2.28), include memory map entries with phys_addr=0x0 and num_pages=0.
Currently the log output for this case (with efi=debug) looks like:
[ 0.000000] efi: mem45: [Reserved | | | | | | | | | | | | ] range=[0x0000000000000000-0xffffffffffffffff] (0MB)
This is clearly wrong, and also not as informative as it could be. This
patch changes it so that if we find obviously invalid memory map
entries, we print an error and those entries. It also detects the
display of the address range calculation overflow, so the new output is:
[ 0.000000] efi: [Firmware Bug]: Invalid EFI memory map entries:
[ 0.000000] efi: mem45: [Reserved | | | | | | | | | | | | ] range=[0x0000000000000000-0x0000000000000000] (invalid)
It also detects memory map sizes that would overflow the physical
address, for example phys_addr=0xfffffffffffff000 and
num_pages=0x0200000000000001, and prints:
[ 0.000000] efi: [Firmware Bug]: Invalid EFI memory map entries:
[ 0.000000] efi: mem45: [Reserved | | | | | | | | | | | | ] range=[phys_addr=0xfffffffffffff000-0x20ffffffffffffffff] (invalid)
It then removes these entries from the memory map.
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Peter Jones <pjones@redhat.com>
[ardb: refactor for clarity with no functional changes, avoid PAGE_SHIFT]
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
---
arch/x86/platform/efi/efi.c | 70 +++++++++++++++++++++++++++++++++++++++++++++
include/linux/efi.h | 1 +
2 files changed, 71 insertions(+)
diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c
index bf99aa7..0a1550b 100644
--- a/arch/x86/platform/efi/efi.c
+++ b/arch/x86/platform/efi/efi.c
@@ -210,6 +210,74 @@ int __init efi_memblock_x86_reserve_range(void)
return 0;
}
+#define OVERFLOW_ADDR_SHIFT (64 - EFI_PAGE_SHIFT)
+#define OVERFLOW_ADDR_MASK (U64_MAX << OVERFLOW_ADDR_SHIFT)
+#define U64_HIGH_BIT (~(U64_MAX >> 1))
+
+static bool __init efi_memmap_entry_valid(const efi_memory_desc_t *md, int i)
+{
+ static __initdata bool once = true;
+ u64 end = (md->num_pages << EFI_PAGE_SHIFT) + md->phys_addr - 1;
+ u64 end_hi = 0;
+ char buf[64];
+
+ if (md->num_pages == 0) {
+ end = 0;
+ } else if (md->num_pages > EFI_PAGES_MAX ||
+ EFI_PAGES_MAX - md->num_pages <
+ (md->phys_addr >> EFI_PAGE_SHIFT)) {
+ end_hi = (md->num_pages & OVERFLOW_ADDR_MASK)
+ >> OVERFLOW_ADDR_SHIFT;
+
+ if ((md->phys_addr & U64_HIGH_BIT) && !(end & U64_HIGH_BIT))
+ end_hi += 1;
+ } else {
+ return true;
+ }
+
+ if (once) {
+ pr_warn(FW_BUG "Invalid EFI memory map entries:\n");
+ once = false;
+ }
+
+ if (end_hi) {
+ pr_warn("mem%02u: %s range=[0x%016llx-0x%llx%016llx] (invalid)\n",
+ i, efi_md_typeattr_format(buf, sizeof(buf), md),
+ md->phys_addr, end_hi, end);
+ } else {
+ pr_warn("mem%02u: %s range=[0x%016llx-0x%016llx] (invalid)\n",
+ i, efi_md_typeattr_format(buf, sizeof(buf), md),
+ md->phys_addr, end);
+ }
+ return false;
+}
+
+static void __init efi_clean_memmap(void)
+{
+ efi_memory_desc_t *out = efi.memmap.map;
+ const efi_memory_desc_t *in = out;
+ const efi_memory_desc_t *end = efi.memmap.map_end;
+ int i, n_removal;
+
+ for (i = n_removal = 0; in < end; i++) {
+ if (efi_memmap_entry_valid(in, i)) {
+ if (out != in)
+ memcpy(out, in, efi.memmap.desc_size);
+ out = (void *)out + efi.memmap.desc_size;
+ } else {
+ n_removal++;
+ }
+ in = (void *)in + efi.memmap.desc_size;
+ }
+
+ if (n_removal > 0) {
+ u64 size = efi.memmap.nr_map - n_removal;
+
+ pr_warn("Removing %d invalid memory map entries.\n", n_removal);
+ efi_memmap_install(efi.memmap.phys_map, size);
+ }
+}
+
void __init efi_print_memmap(void)
{
efi_memory_desc_t *md;
@@ -472,6 +540,8 @@ void __init efi_init(void)
}
}
+ efi_clean_memmap();
+
if (efi_enabled(EFI_DBG))
efi_print_memmap();
}
diff --git a/include/linux/efi.h b/include/linux/efi.h
index 4c1b3ea..712a3aa 100644
--- a/include/linux/efi.h
+++ b/include/linux/efi.h
@@ -103,6 +103,7 @@ typedef struct {
#define EFI_PAGE_SHIFT 12
#define EFI_PAGE_SIZE (1UL << EFI_PAGE_SHIFT)
+#define EFI_PAGES_MAX (U64_MAX >> EFI_PAGE_SHIFT)
typedef struct {
u32 type;
--
2.9.3

4
efi-lockdown.patch
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@ -1073,8 +1073,8 @@ index 5bb1985..6441d21 100644
return -EFAULT;
@@ -515,6 +518,9 @@ static ssize_t write_kmem(struct file *file, const char __user *buf,
if (!pfn_valid(PFN_DOWN(p)))
return -EIO;
char *kbuf; /* k-addr because vwrite() takes vmlist_lock rwlock */
int err = 0;
+ if (kernel_is_locked_down())
+ return -EPERM;

2
gitrev
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@ -1 +1 @@
557ed56cc75e0a33c15ba438734a280bac23bd32
49def1853334396f948dcb4cedb9347abb318df5

12
kernel.spec
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@ -42,7 +42,7 @@ Summary: The Linux kernel
# For non-released -rc kernels, this will be appended after the rcX and
# gitX tags, so a 3 here would become part of release "0.rcX.gitX.3"
#
%global baserelease 2
%global baserelease 1
%global fedora_build %{baserelease}
# base_sublevel is the kernel version we're starting with and patching
@ -67,9 +67,9 @@ Summary: The Linux kernel
# The next upstream release sublevel (base_sublevel+1)
%define upstream_sublevel %(echo $((%{base_sublevel} + 1)))
# The rc snapshot level
%global rcrev 3
%global rcrev 4
# The git snapshot level
%define gitrev 4
%define gitrev 0
# Set rpm version accordingly
%define rpmversion 4.%{upstream_sublevel}.0
%endif
@ -579,9 +579,6 @@ Patch665: netfilter-x_tables-deal-with-bogus-nextoffset-values.patch
#ongoing complaint, full discussion delayed until ksummit/plumbers
Patch849: 0001-iio-Use-event-header-from-kernel-tree.patch
# Work around thinkpad firmware memory layout issues and efi_mem_reserve()
Patch850: 0001-efi-prune-invalid-memory-map-entries.patch
# Fix build issue with armada_trace
Patch851: Armada-trace-build-fix.patch
@ -2155,8 +2152,9 @@ fi
#
#
%changelog
* Mon Jan 16 2017 Justin M. Forbes <jforbes@fedoraproject.org> - 4.10.0-0.rc3.git4.2
* Mon Jan 16 2017 Justin M. Forbes <jforbes@fedoraproject.org> - 4.10.0-0.rc4.git0.1
- Disable debugging options.
- Linux v4.10-rc4
* Mon Jan 16 2017 Peter Robinson <pbrobinson@fedoraproject.org>
- Minor ARM updates

3
sources
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@ -1,4 +1,3 @@
SHA512 (linux-4.9.tar.xz) = bf67ff812cc3cb7e5059e82cc5db0d9a7c5637f7ed9a42e4730c715bf7047c81ed3a571225f92a33ef0b6d65f35595bc32d773356646df2627da55e9bc7f1f1a
SHA512 (perf-man-4.9.tar.gz) = d23bb3da1eadd6623fddbf4696948de7675f3dcf57c711a7427dd7ae111394f58d8f42752938bbea7cd219f1e7f6f116fc67a1c74f769711063940a065f37b99
SHA512 (patch-4.10-rc3.xz) = 3573b198b6ee488d6c573dd09c534548a08bcf8a017a94f74d127a58a018c9e97056006fccd555aa49513cc3f98ad5c1cb6545a7e261d3ccaea21456b53f2dd5
SHA512 (patch-4.10-rc3-git4.xz) = bad15249a0e5675fdfa5d628ac4c556e1e4b58c89239a9ae0357277b34738185e2176b5a0510a4e4eff417b2bf9d03f31f98711440961768e275bad04d638f93
SHA512 (patch-4.10-rc4.xz) = 89d903d52ff907f3911ac09214d1299c310fd67b7ff36170c6233e6348049fb0f669ba245a8ca310f52c91eb523aa5f91a9b52f4c67ca932b951fe2c60f25ae5