diff options
| author | H. Peter Anvin <hpa@linux.intel.com> | 2014-02-14 20:11:18 +0100 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2014-02-14 20:11:18 +0100 |
| commit | 31fce91e7afc25c666276f65f019bc13fd27e216 (patch) | |
| tree | 24f9673614a98a06fd8f4254c63b306dddd5aac6 /arch | |
| parent | x86, smap: smap_violation() is bogus if CONFIG_X86_SMAP is off (diff) | |
| parent | x86/efi: Check status field to validate BGRT header (diff) | |
| download | linux-31fce91e7afc25c666276f65f019bc13fd27e216.tar.xz linux-31fce91e7afc25c666276f65f019bc13fd27e216.zip | |
Merge remote-tracking branch 'efi/urgent' into x86/urgent
There have been reports of EFI crashes since -rc1. The following two
commits fix known issues.
* Fix boot failure on 32-bit EFI due to the recent EFI memmap changes
merged during the merge window - Borislav Petkov
* Avoid a crash during efi_bgrt_init() by detecting invalid BGRT
headers based on the 'status' field.
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/efi.h | 2 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi-bgrt.c | 2 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi.c | 5 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_32.c | 6 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 9 |
5 files changed, 20 insertions, 4 deletions
diff --git a/arch/x86/include/asm/efi.h b/arch/x86/include/asm/efi.h index 3b978c472d08..3d6b9f81cc68 100644 --- a/arch/x86/include/asm/efi.h +++ b/arch/x86/include/asm/efi.h @@ -132,6 +132,8 @@ extern void __init efi_map_region_fixed(efi_memory_desc_t *md); extern void efi_sync_low_kernel_mappings(void); extern void efi_setup_page_tables(void); extern void __init old_map_region(efi_memory_desc_t *md); +extern void __init runtime_code_page_mkexec(void); +extern void __init efi_runtime_mkexec(void); struct efi_setup_data { u64 fw_vendor; diff --git a/arch/x86/platform/efi/efi-bgrt.c b/arch/x86/platform/efi/efi-bgrt.c index 4df9591eadad..f15103dff4b4 100644 --- a/arch/x86/platform/efi/efi-bgrt.c +++ b/arch/x86/platform/efi/efi-bgrt.c @@ -42,7 +42,7 @@ void __init efi_bgrt_init(void) if (bgrt_tab->header.length < sizeof(*bgrt_tab)) return; - if (bgrt_tab->version != 1) + if (bgrt_tab->version != 1 || bgrt_tab->status != 1) return; if (bgrt_tab->image_type != 0 || !bgrt_tab->image_address) return; diff --git a/arch/x86/platform/efi/efi.c b/arch/x86/platform/efi/efi.c index d62ec87a2b26..1a201ac7cef8 100644 --- a/arch/x86/platform/efi/efi.c +++ b/arch/x86/platform/efi/efi.c @@ -792,7 +792,7 @@ void __init efi_set_executable(efi_memory_desc_t *md, bool executable) set_memory_nx(addr, npages); } -static void __init runtime_code_page_mkexec(void) +void __init runtime_code_page_mkexec(void) { efi_memory_desc_t *md; void *p; @@ -1069,8 +1069,7 @@ void __init efi_enter_virtual_mode(void) efi.update_capsule = virt_efi_update_capsule; efi.query_capsule_caps = virt_efi_query_capsule_caps; - if (efi_enabled(EFI_OLD_MEMMAP) && (__supported_pte_mask & _PAGE_NX)) - runtime_code_page_mkexec(); + efi_runtime_mkexec(); kfree(new_memmap); diff --git a/arch/x86/platform/efi/efi_32.c b/arch/x86/platform/efi/efi_32.c index 249b183cf417..0b74cdf7f816 100644 --- a/arch/x86/platform/efi/efi_32.c +++ b/arch/x86/platform/efi/efi_32.c @@ -77,3 +77,9 @@ void efi_call_phys_epilog(void) local_irq_restore(efi_rt_eflags); } + +void __init efi_runtime_mkexec(void) +{ + if (__supported_pte_mask & _PAGE_NX) + runtime_code_page_mkexec(); +} diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 6284f158a47d..0c2a234fef1e 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -233,3 +233,12 @@ void __init parse_efi_setup(u64 phys_addr, u32 data_len) { efi_setup = phys_addr + sizeof(struct setup_data); } + +void __init efi_runtime_mkexec(void) +{ + if (!efi_enabled(EFI_OLD_MEMMAP)) + return; + + if (__supported_pte_mask & _PAGE_NX) + runtime_code_page_mkexec(); +} |