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  PHC 
Open Source and information security mailing list archives
 
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Date:   Wed, 20 May 2020 20:23:17 -0700
From:   Andrew Morton <akpm@...ux-foundation.org>
To:     Michel Lespinasse <walken@...gle.com>
Cc:     linux-mm <linux-mm@...ck.org>, LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Laurent Dufour <ldufour@...ux.ibm.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Matthew Wilcox <willy@...radead.org>,
        Liam Howlett <Liam.Howlett@...cle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Davidlohr Bueso <dave@...olabs.net>,
        David Rientjes <rientjes@...gle.com>,
        Hugh Dickins <hughd@...gle.com>, Ying Han <yinghan@...gle.com>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Daniel Jordan <daniel.m.jordan@...cle.com>,
        John Hubbard <jhubbard@...dia.com>
Subject: Re: [PATCH v6 05/12] mmap locking API: convert mmap_sem call sites
 missed by coccinelle

On Tue, 19 May 2020 22:29:01 -0700 Michel Lespinasse <walken@...gle.com> wrote:

> Convert the last few remaining mmap_sem rwsem calls to use the new
> mmap locking API. These were missed by coccinelle for some reason
> (I think coccinelle does not support some of the preprocessor
> constructs in these files ?)


From: Andrew Morton <akpm@...ux-foundation.org>
Subject: mmap-locking-api-convert-mmap_sem-call-sites-missed-by-coccinelle-fix

convert linux-next leftovers

Cc: Michel Lespinasse <walken@...gle.com>
Cc: Daniel Jordan <daniel.m.jordan@...cle.com>
Cc: Laurent Dufour <ldufour@...ux.ibm.com>
Cc: Vlastimil Babka <vbabka@...e.cz>
Cc: Davidlohr Bueso <dbueso@...e.de>
Cc: David Rientjes <rientjes@...gle.com>
Cc: Hugh Dickins <hughd@...gle.com>
Cc: Jason Gunthorpe <jgg@...pe.ca>
Cc: Jerome Glisse <jglisse@...hat.com>
Cc: John Hubbard <jhubbard@...dia.com>
Cc: Liam Howlett <Liam.Howlett@...cle.com>
Cc: Matthew Wilcox <willy@...radead.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Ying Han <yinghan@...gle.com>
Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
---

 arch/arm64/kvm/mmu.c |   14 +++++++-------
 lib/test_hmm.c       |   14 +++++++-------
 2 files changed, 14 insertions(+), 14 deletions(-)

--- a/lib/test_hmm.c~mmap-locking-api-convert-mmap_sem-call-sites-missed-by-coccinelle-fix
+++ a/lib/test_hmm.c
@@ -243,9 +243,9 @@ static int dmirror_range_fault(struct dm
 		}
 
 		range->notifier_seq = mmu_interval_read_begin(range->notifier);
-		down_read(&mm->mmap_sem);
+		mmap_read_lock(mm);
 		ret = hmm_range_fault(range);
-		up_read(&mm->mmap_sem);
+		mmap_read_unlock(mm);
 		if (ret) {
 			if (ret == -EBUSY)
 				continue;
@@ -684,7 +684,7 @@ static int dmirror_migrate(struct dmirro
 	if (!mmget_not_zero(mm))
 		return -EINVAL;
 
-	down_read(&mm->mmap_sem);
+	mmap_read_lock(mm);
 	for (addr = start; addr < end; addr = next) {
 		vma = find_vma(mm, addr);
 		if (!vma || addr < vma->vm_start ||
@@ -711,7 +711,7 @@ static int dmirror_migrate(struct dmirro
 		dmirror_migrate_finalize_and_map(&args, dmirror);
 		migrate_vma_finalize(&args);
 	}
-	up_read(&mm->mmap_sem);
+	mmap_read_unlock(mm);
 	mmput(mm);
 
 	/* Return the migrated data for verification. */
@@ -731,7 +731,7 @@ static int dmirror_migrate(struct dmirro
 	return ret;
 
 out:
-	up_read(&mm->mmap_sem);
+	mmap_read_unlock(mm);
 	mmput(mm);
 	return ret;
 }
@@ -823,9 +823,9 @@ static int dmirror_range_snapshot(struct
 
 		range->notifier_seq = mmu_interval_read_begin(range->notifier);
 
-		down_read(&mm->mmap_sem);
+		mmap_read_lock(mm);
 		ret = hmm_range_fault(range);
-		up_read(&mm->mmap_sem);
+		mmap_read_unlock(mm);
 		if (ret) {
 			if (ret == -EBUSY)
 				continue;
--- a/arch/arm64/kvm/mmu.c~mmap-locking-api-convert-mmap_sem-call-sites-missed-by-coccinelle-fix
+++ a/arch/arm64/kvm/mmu.c
@@ -1084,7 +1084,7 @@ void stage2_unmap_vm(struct kvm *kvm)
 	int idx;
 
 	idx = srcu_read_lock(&kvm->srcu);
-	down_read(&current->mm->mmap_sem);
+	mmap_read_lock(current->mm);
 	spin_lock(&kvm->mmu_lock);
 
 	slots = kvm_memslots(kvm);
@@ -1092,7 +1092,7 @@ void stage2_unmap_vm(struct kvm *kvm)
 		stage2_unmap_memslot(kvm, memslot);
 
 	spin_unlock(&kvm->mmu_lock);
-	up_read(&current->mm->mmap_sem);
+	mmap_read_unlock(current->mm);
 	srcu_read_unlock(&kvm->srcu, idx);
 }
 
@@ -1848,11 +1848,11 @@ static int user_mem_abort(struct kvm_vcp
 	}
 
 	/* Let's check if we will get back a huge page backed by hugetlbfs */
-	down_read(&current->mm->mmap_sem);
+	mmap_read_lock(current->mm);
 	vma = find_vma_intersection(current->mm, hva, hva + 1);
 	if (unlikely(!vma)) {
 		kvm_err("Failed to find VMA for hva 0x%lx\n", hva);
-		up_read(&current->mm->mmap_sem);
+		mmap_read_unlock(current->mm);
 		return -EFAULT;
 	}
 
@@ -1879,7 +1879,7 @@ static int user_mem_abort(struct kvm_vcp
 	if (vma_pagesize == PMD_SIZE ||
 	    (vma_pagesize == PUD_SIZE && kvm_stage2_has_pmd(kvm)))
 		gfn = (fault_ipa & huge_page_mask(hstate_vma(vma))) >> PAGE_SHIFT;
-	up_read(&current->mm->mmap_sem);
+	mmap_read_unlock(current->mm);
 
 	/* We need minimum second+third level pages */
 	ret = mmu_topup_memory_cache(memcache, kvm_mmu_cache_min_pages(kvm),
@@ -2456,7 +2456,7 @@ int kvm_arch_prepare_memory_region(struc
 	    (kvm_phys_size(kvm) >> PAGE_SHIFT))
 		return -EFAULT;
 
-	down_read(&current->mm->mmap_sem);
+	mmap_read_lock(current->mm);
 	/*
 	 * A memory region could potentially cover multiple VMAs, and any holes
 	 * between them, so iterate over all of them to find out if we can map
@@ -2515,7 +2515,7 @@ int kvm_arch_prepare_memory_region(struc
 		stage2_flush_memslot(kvm, memslot);
 	spin_unlock(&kvm->mmu_lock);
 out:
-	up_read(&current->mm->mmap_sem);
+	mmap_read_unlock(current->mm);
 	return ret;
 }
 
_

Powered by blists - more mailing lists