diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-02 06:41:41 -0600 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-03-02 06:41:41 -0600 |
| commit | e130a920f69399777062f9fe7763abe895d386b0 (patch) | |
| tree | b036019bf4b28104efe2c7daf9163bced957a354 /drivers | |
| parent | 98d54f81e36ba3bf92172791eba5ca5bd813989b (diff) | |
| parent | be36f9e7517e17810ec369626a128d7948942259 (diff) | |
Merge branch 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull EFI fixes from Ingo Molnar:
"Three fixes to EFI mixed boot mode, mostly related to x86-64 vmap
stacks activated years ago, bug-fixed recently for EFI, which had
knock-on effects of various 1:1 mapping assumptions in mixed mode.
There's also a READ_ONCE() fix for reading an mmap-ed EFI firmware
data field only once, out of caution"
* 'efi-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
efi: READ_ONCE rng seed size before munmap
efi/x86: Handle by-ref arguments covering multiple pages in mixed mode
efi/x86: Remove support for EFI time and counter services in mixed mode
efi/x86: Align GUIDs to their size in the mixed mode runtime wrapper
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/firmware/efi/efi.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 621220ab3d0e..21ea99f65113 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -552,7 +552,7 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz, seed = early_memremap(efi.rng_seed, sizeof(*seed)); if (seed != NULL) { - size = seed->size; + size = READ_ONCE(seed->size); early_memunmap(seed, sizeof(*seed)); } else { pr_err("Could not map UEFI random seed!\n"); @@ -562,7 +562,7 @@ int __init efi_config_parse_tables(void *config_tables, int count, int sz, sizeof(*seed) + size); if (seed != NULL) { pr_notice("seeding entropy pool\n"); - add_bootloader_randomness(seed->bits, seed->size); + add_bootloader_randomness(seed->bits, size); early_memunmap(seed, sizeof(*seed) + size); } else { pr_err("Could not map UEFI random seed!\n"); |