4.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Andrey Ryabinin <a.ryabinin@xxxxxxxxxxx> 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.ryabinin@xxxxxxxxxxx> Cc: Alexander Popov <alpopov@xxxxxxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Andrey Konovalov <adech.fo@xxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: http://lkml.kernel.org/r/1435828178-10975-4-git-send-email-a.ryabinin@xxxxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/x86/mm/kasan_init_64.c | 2 ++ 1 file changed, 2 insertions(+) --- 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; } -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html