The commit is pushed to "branch-rh7-3.10.0-229.7.2-ovz" and will appear at
https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-229.7.2.vz7.6.6
------>
commit f1796a8d4debf66ae569701aeaf5e739661808c2
Author: Andrey Ryabinin <aryabi...@odin.com>
Date: Thu Sep 3 19:27:51 2015 +0400
ms/x86/kasan: Flush TLBs after switching CR3
https://jira.sw.ru/browse/PSBM-26429
From: Andrey Ryabinin <a.ryabi...@samsung.com>
commit 241d2c54c62fa0939fc9a9512b48ac3434e90a89 upstream.
load_cr3() doesn't cause tlb_flush if PGE enabled.
This may cause tons of false positive reports spamming the
kernel to death.
To fix this __flush_tlb_all() should be called explicitly
after CR3 changed.
Signed-off-by: Andrey Ryabinin <a.ryabi...@samsung.com>
Cc: <sta...@vger.kernel.org> # 4.0+
Cc: Alexander Popov <alpo...@ptsecurity.com>
Cc: Alexander Potapenko <gli...@google.com>
Cc: Andrey Konovalov <adech...@gmail.com>
Cc: Borislav Petkov <b...@alien8.de>
Cc: Dmitry Vyukov <dvyu...@google.com>
Cc: Linus Torvalds <torva...@linux-foundation.org>
Cc: Peter Zijlstra <pet...@infradead.org>
Cc: Thomas Gleixner <t...@linutronix.de>
Link:
http://lkml.kernel.org/r/1435828178-10975-4-git-send-email-a.ryabi...@samsung.com
Signed-off-by: Ingo Molnar <mi...@kernel.org>
Signed-off-by: Andrey Ryabinin <aryabi...@odin.com>
Signed-off-by: Andrey Ryabinin <aryabi...@odin.com>
---
arch/x86/mm/kasan_init_64.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c
index ad0b931..0ada6cc 100644
--- a/arch/x86/mm/kasan_init_64.c
+++ b/arch/x86/mm/kasan_init_64.c
@@ -208,6 +208,7 @@ void __init kasan_init(void)
memcpy(early_level4_pgt, init_level4_pgt, sizeof(early_level4_pgt));
load_cr3(early_level4_pgt);
+ __flush_tlb_all();
clear_pgds(KASAN_SHADOW_START, KASAN_SHADOW_END);
@@ -234,5 +235,6 @@ void __init kasan_init(void)
memset(kasan_zero_page, 0, PAGE_SIZE);
load_cr3(init_level4_pgt);
+ __flush_tlb_all();
init_task.kasan_depth = 0;
}
_______________________________________________
Devel mailing list
Devel@openvz.org
https://lists.openvz.org/mailman/listinfo/devel
