linux-kernel - [tip:x86/urgent] x86, mm: Correct vmflag test for checking VM

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Date:	Tue, 20 Nov 2012 16:58:44 -0800
From:	tip-bot for Joonsoo Kim <js1304@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, js1304@...il.com, hpa@...or.com,
	mingo@...nel.org, alex.shi@...el.com, tglx@...utronix.de,
	hpa@...ux.intel.com
Subject: [tip:x86/urgent] x86, mm:
  Correct vmflag test for checking VM_HUGETLB

Commit-ID:  ddd32b4289a6feda9ad9e68b0d85641c389a72ba
Gitweb:     http://git.kernel.org/tip/ddd32b4289a6feda9ad9e68b0d85641c389a72ba
Author:     Joonsoo Kim <js1304@...il.com>
AuthorDate: Tue, 13 Nov 2012 02:17:36 +0900
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Wed, 14 Nov 2012 15:03:20 -0800

x86, mm: Correct vmflag test for checking VM_HUGETLB

commit 611ae8e3f5204f7480b3b405993b3352cfa16662('enable tlb flush range
support for x86') change flush_tlb_mm_range() considerably. After this,
we test whether vmflag equal to VM_HUGETLB and it may be always failed,
because vmflag usually has other flags simultaneously.
Our intention is to check whether this vma is for hughtlb, so correct it
according to this purpose.

Signed-off-by: Joonsoo Kim <js1304@...il.com>
Acked-by: Alex Shi <alex.shi@...el.com>
Link: http://lkml.kernel.org/r/1352740656-19417-1-git-send-email-js1304@gmail.com
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/mm/tlb.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index 0777f04..60f926c 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -197,7 +197,7 @@ void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
 	}
 
 	if (end == TLB_FLUSH_ALL || tlb_flushall_shift == -1
-					|| vmflag == VM_HUGETLB) {
+					|| vmflag & VM_HUGETLB) {
 		local_flush_tlb();
 		goto flush_all;
 	}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/