diff options
| author | David Rientjes <rientjes@google.com> | 2019-07-10 22:19:35 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2019-07-16 23:13:48 +0200 |
| commit | ffdb07f31252625b7bcbf1f424d7beccff02ba97 (patch) | |
| tree | ca21912b745930c66e86cb14826cd5e3476e9597 /arch | |
| parent | x86/boot: Fix memory leak in default_get_smp_config() (diff) | |
| download | linux-ffdb07f31252625b7bcbf1f424d7beccff02ba97.tar.xz linux-ffdb07f31252625b7bcbf1f424d7beccff02ba97.zip | |
x86/mm: Free sme_early_buffer after init
The contents of sme_early_buffer should be cleared after
__sme_early_enc_dec() because it is used to move encrypted and decrypted
data, but since __sme_early_enc_dec() is __init this buffer simply can be
freed after init.
This saves a page that is otherwise unreferenced after init.
Reported-by: Cfir Cohen <cfir@google.com>
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1907101318170.197432@chino.kir.corp.google.com
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/mm/mem_encrypt.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c index e0df96fdfe46..e94e0a62ba92 100644 --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -41,7 +41,7 @@ EXPORT_SYMBOL_GPL(sev_enable_key); bool sev_enabled __section(.data); /* Buffer used for early in-place encryption by BSP, no locking needed */ -static char sme_early_buffer[PAGE_SIZE] __aligned(PAGE_SIZE); +static char sme_early_buffer[PAGE_SIZE] __initdata __aligned(PAGE_SIZE); /* * This routine does not change the underlying encryption setting of the |