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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-23 00:05:48 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-11-23 00:05:48 +0300 |
| commit | 68d3fa235fd83ab0fd36c367c0530d16c764051b (patch) | |
| tree | 8bb9735bdf0c4c6a44216af51c67990b76ac5620 /arch | |
| parent | 7d53be55c9d78feb38b29fbcaf77af1343549cf1 (diff) | |
| parent | c2fe61d8be491ff8188edaf22e838f819999146b (diff) | |
| download | linux-68d3fa235fd83ab0fd36c367c0530d16c764051b.tar.xz | |
Merge tag 'efi-urgent-for-v5.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Borislav Petkov:
"Forwarded EFI fixes from Ard Biesheuvel:
- fix memory leak in efivarfs driver
- fix HYP mode issue in 32-bit ARM version of the EFI stub when built
in Thumb2 mode
- avoid leaking EFI pgd pages on allocation failure"
* tag 'efi-urgent-for-v5.10-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi/x86: Free efi_pgd with free_pages()
efivarfs: fix memory leak in efivarfs_create()
efi/arm: set HSCTLR Thumb2 bit correctly for HVC calls from HYP
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/boot/compressed/head.S | 3 | ||||
| -rw-r--r-- | arch/x86/platform/efi/efi_64.c | 24 |
2 files changed, 16 insertions, 11 deletions
diff --git a/arch/arm/boot/compressed/head.S b/arch/arm/boot/compressed/head.S index 2e04ec5b5446..caa27322a0ab 100644 --- a/arch/arm/boot/compressed/head.S +++ b/arch/arm/boot/compressed/head.S @@ -1472,6 +1472,9 @@ ENTRY(efi_enter_kernel) @ issued from HYP mode take us to the correct handler code. We @ will disable the MMU before jumping to the kernel proper. @ + ARM( bic r1, r1, #(1 << 30) ) @ clear HSCTLR.TE + THUMB( orr r1, r1, #(1 << 30) ) @ set HSCTLR.TE + mcr p15, 4, r1, c1, c0, 0 adr r0, __hyp_reentry_vectors mcr p15, 4, r0, c12, c0, 0 @ set HYP vector base (HVBAR) isb diff --git a/arch/x86/platform/efi/efi_64.c b/arch/x86/platform/efi/efi_64.c index 8f5759df7776..e1e8d4e3a213 100644 --- a/arch/x86/platform/efi/efi_64.c +++ b/arch/x86/platform/efi/efi_64.c @@ -78,28 +78,30 @@ int __init efi_alloc_page_tables(void) gfp_mask = GFP_KERNEL | __GFP_ZERO; efi_pgd = (pgd_t *)__get_free_pages(gfp_mask, PGD_ALLOCATION_ORDER); if (!efi_pgd) - return -ENOMEM; + goto fail; pgd = efi_pgd + pgd_index(EFI_VA_END); p4d = p4d_alloc(&init_mm, pgd, EFI_VA_END); - if (!p4d) { - free_page((unsigned long)efi_pgd); - return -ENOMEM; - } + if (!p4d) + goto free_pgd; pud = pud_alloc(&init_mm, p4d, EFI_VA_END); - if (!pud) { - if (pgtable_l5_enabled()) - free_page((unsigned long) pgd_page_vaddr(*pgd)); - free_pages((unsigned long)efi_pgd, PGD_ALLOCATION_ORDER); - return -ENOMEM; - } + if (!pud) + goto free_p4d; efi_mm.pgd = efi_pgd; mm_init_cpumask(&efi_mm); init_new_context(NULL, &efi_mm); return 0; + +free_p4d: + if (pgtable_l5_enabled()) + free_page((unsigned long)pgd_page_vaddr(*pgd)); +free_pgd: + free_pages((unsigned long)efi_pgd, PGD_ALLOCATION_ORDER); +fail: + return -ENOMEM; } /* |