linux-kernel - [PATCH v5 0/2] Fix issues with vmalloc flush flag

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Message-Id: <20190527211058.2729-1-rick.p.edgecombe@intel.com>
Date:   Mon, 27 May 2019 14:10:56 -0700
From:   Rick Edgecombe <rick.p.edgecombe@...el.com>
To:     linux-kernel@...r.kernel.org, peterz@...radead.org,
        sparclinux@...r.kernel.org, linux-mm@...ck.org,
        netdev@...r.kernel.org, luto@...nel.org
Cc:     dave.hansen@...el.com, namit@...are.com,
        Rick Edgecombe <rick.p.edgecombe@...el.com>
Subject: [PATCH v5 0/2] Fix issues with vmalloc flush flag

These two patches address issues with the recently added
VM_FLUSH_RESET_PERMS vmalloc flag.

Patch 1 addresses an issue that could cause a crash after other
architectures besides x86 rely on this path.

Patch 2 addresses an issue where in a rare case strange arguments
could be provided to flush_tlb_kernel_range(). 

v4->v5:
 - Update commit messages with info that the first issue will actually
   not cause problems today
 - Avoid re-use of variable (PeterZ)

v3->v4:
 - Drop patch that switched vm_unmap_alias() calls to regular flush (Andy)
 - Add patch to address correctness previously fixed in dropped patch

v2->v3:
 - Split into two patches (Andy)

v1->v2:
 - Update commit message with more detail
 - Fix flush end range on !CONFIG_ARCH_HAS_SET_DIRECT_MAP case


Rick Edgecombe (2):
  vmalloc: Fix calculation of direct map addr range
  vmalloc: Avoid rare case of flushing tlb with weird arguments

 mm/vmalloc.c | 15 +++++++++------
 1 file changed, 9 insertions(+), 6 deletions(-)

-- 
2.20.1