+++ /dev/null
-From 4e78921ba4dd0aca1cc89168f45039add4183f8e Mon Sep 17 00:00:00 2001
-From: Gen Zhang <blackgod016574@gmail.com>
-Date: Sat, 25 May 2019 13:25:58 +0200
-Subject: efi/x86/Add missing error handling to old_memmap 1:1 mapping code
-
-From: Gen Zhang <blackgod016574@gmail.com>
-
-commit 4e78921ba4dd0aca1cc89168f45039add4183f8e upstream.
-
-The old_memmap flow in efi_call_phys_prolog() performs numerous memory
-allocations, and either does not check for failure at all, or it does
-but fails to propagate it back to the caller, which may end up calling
-into the firmware with an incomplete 1:1 mapping.
-
-So let's fix this by returning NULL from efi_call_phys_prolog() on
-memory allocation failures only, and by handling this condition in the
-caller. Also, clean up any half baked sets of page tables that we may
-have created before returning with a NULL return value.
-
-Note that any failure at this level will trigger a panic() two levels
-up, so none of this makes a huge difference, but it is a nice cleanup
-nonetheless.
-
-[ardb: update commit log, add efi_call_phys_epilog() call on error path]
-
-Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
-Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-Cc: Linus Torvalds <torvalds@linux-foundation.org>
-Cc: Peter Zijlstra <peterz@infradead.org>
-Cc: Rob Bradford <robert.bradford@intel.com>
-Cc: Thomas Gleixner <tglx@linutronix.de>
-Cc: linux-efi@vger.kernel.org
-Link: http://lkml.kernel.org/r/20190525112559.7917-2-ard.biesheuvel@linaro.org
-Signed-off-by: Ingo Molnar <mingo@kernel.org>
-Cc: Zubin Mithra <zsm@chromium.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- arch/x86/platform/efi/efi.c | 2 ++
- arch/x86/platform/efi/efi_64.c | 9 ++++++---
- 2 files changed, 8 insertions(+), 3 deletions(-)
-
---- a/arch/x86/platform/efi/efi.c
-+++ b/arch/x86/platform/efi/efi.c
-@@ -86,6 +86,8 @@ static efi_status_t __init phys_efi_set_
- pgd_t *save_pgd;
-
- save_pgd = efi_call_phys_prolog();
-+ if (!save_pgd)
-+ return EFI_ABORTED;
-
- /* Disable interrupts around EFI calls: */
- local_irq_save(flags);
---- a/arch/x86/platform/efi/efi_64.c
-+++ b/arch/x86/platform/efi/efi_64.c
-@@ -84,13 +84,15 @@ pgd_t * __init efi_call_phys_prolog(void
-
- if (!efi_enabled(EFI_OLD_MEMMAP)) {
- efi_switch_mm(&efi_mm);
-- return NULL;
-+ return efi_mm.pgd;
- }
-
- early_code_mapping_set_exec(1);
-
- n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE);
- save_pgd = kmalloc_array(n_pgds, sizeof(*save_pgd), GFP_KERNEL);
-+ if (!save_pgd)
-+ return NULL;
-
- /*
- * Build 1:1 identity mapping for efi=old_map usage. Note that
-@@ -138,10 +140,11 @@ pgd_t * __init efi_call_phys_prolog(void
- pgd_offset_k(pgd * PGDIR_SIZE)->pgd &= ~_PAGE_NX;
- }
-
--out:
- __flush_tlb_all();
--
- return save_pgd;
-+out:
-+ efi_call_phys_epilog(save_pgd);
-+ return NULL;
- }
-
- void __init efi_call_phys_epilog(pgd_t *save_pgd)
cifs-cifs_read_allocate_pages-don-t-iterate-through-whole-page-array-on-enomem.patch
revert-lockd-show-pid-of-lockd-for-remote-locks.patch
gcc-plugins-fix-build-failures-under-darwin-host.patch
-efi-x86-add-missing-error-handling-to-old_memmap-1-1-mapping-code.patch
drm-tegra-gem-fix-cpu-cache-maintenance-for-bo-s-allocated-using-get_pages.patch
drm-vmwgfx-don-t-send-drm-sysfs-hotplug-events-on-initial-master-set.patch
drm-sun4i-fix-sun8i-hdmi-phy-clock-initialization.patch
+++ /dev/null
-From 4e78921ba4dd0aca1cc89168f45039add4183f8e Mon Sep 17 00:00:00 2001
-From: Gen Zhang <blackgod016574@gmail.com>
-Date: Sat, 25 May 2019 13:25:58 +0200
-Subject: efi/x86/Add missing error handling to old_memmap 1:1 mapping code
-
-From: Gen Zhang <blackgod016574@gmail.com>
-
-commit 4e78921ba4dd0aca1cc89168f45039add4183f8e upstream.
-
-The old_memmap flow in efi_call_phys_prolog() performs numerous memory
-allocations, and either does not check for failure at all, or it does
-but fails to propagate it back to the caller, which may end up calling
-into the firmware with an incomplete 1:1 mapping.
-
-So let's fix this by returning NULL from efi_call_phys_prolog() on
-memory allocation failures only, and by handling this condition in the
-caller. Also, clean up any half baked sets of page tables that we may
-have created before returning with a NULL return value.
-
-Note that any failure at this level will trigger a panic() two levels
-up, so none of this makes a huge difference, but it is a nice cleanup
-nonetheless.
-
-[ardb: update commit log, add efi_call_phys_epilog() call on error path]
-
-Signed-off-by: Gen Zhang <blackgod016574@gmail.com>
-Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
-Cc: Linus Torvalds <torvalds@linux-foundation.org>
-Cc: Peter Zijlstra <peterz@infradead.org>
-Cc: Rob Bradford <robert.bradford@intel.com>
-Cc: Thomas Gleixner <tglx@linutronix.de>
-Cc: linux-efi@vger.kernel.org
-Link: http://lkml.kernel.org/r/20190525112559.7917-2-ard.biesheuvel@linaro.org
-Signed-off-by: Ingo Molnar <mingo@kernel.org>
-Cc: Zubin Mithra <zsm@chromium.org>
-Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-
----
- arch/x86/platform/efi/efi.c | 2 ++
- arch/x86/platform/efi/efi_64.c | 9 ++++++---
- 2 files changed, 8 insertions(+), 3 deletions(-)
-
---- a/arch/x86/platform/efi/efi.c
-+++ b/arch/x86/platform/efi/efi.c
-@@ -85,6 +85,8 @@ static efi_status_t __init phys_efi_set_
- pgd_t *save_pgd;
-
- save_pgd = efi_call_phys_prolog();
-+ if (!save_pgd)
-+ return EFI_ABORTED;
-
- /* Disable interrupts around EFI calls: */
- local_irq_save(flags);
---- a/arch/x86/platform/efi/efi_64.c
-+++ b/arch/x86/platform/efi/efi_64.c
-@@ -84,13 +84,15 @@ pgd_t * __init efi_call_phys_prolog(void
-
- if (!efi_enabled(EFI_OLD_MEMMAP)) {
- efi_switch_mm(&efi_mm);
-- return NULL;
-+ return efi_mm.pgd;
- }
-
- early_code_mapping_set_exec(1);
-
- n_pgds = DIV_ROUND_UP((max_pfn << PAGE_SHIFT), PGDIR_SIZE);
- save_pgd = kmalloc_array(n_pgds, sizeof(*save_pgd), GFP_KERNEL);
-+ if (!save_pgd)
-+ return NULL;
-
- /*
- * Build 1:1 identity mapping for efi=old_map usage. Note that
-@@ -138,10 +140,11 @@ pgd_t * __init efi_call_phys_prolog(void
- pgd_offset_k(pgd * PGDIR_SIZE)->pgd &= ~_PAGE_NX;
- }
-
--out:
- __flush_tlb_all();
--
- return save_pgd;
-+out:
-+ efi_call_phys_epilog(save_pgd);
-+ return NULL;
- }
-
- void __init efi_call_phys_epilog(pgd_t *save_pgd)
cifs-cifs_read_allocate_pages-don-t-iterate-through-whole-page-array-on-enomem.patch
revert-lockd-show-pid-of-lockd-for-remote-locks.patch
gcc-plugins-fix-build-failures-under-darwin-host.patch
-efi-x86-add-missing-error-handling-to-old_memmap-1-1-mapping-code.patch
drm-tegra-gem-fix-cpu-cache-maintenance-for-bo-s-allocated-using-get_pages.patch
drm-vmwgfx-fix-user-space-handle-equal-to-zero.patch
drm-vmwgfx-fix-compat-mode-shader-operation.patch
projects / thirdparty / kernel / stable-queue.git / commitdiff
