The patch titled
Subject: mm: move debug checks from __vunmap to remove_vm_area
has been added to the -mm mm-unstable branch. Its filename is
mm-move-debug-checks-from-__vunmap-to-remove_vm_area.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-move-debug-checks-from-__vunmap-to-remove_vm_area.patch
This patch will later appear in the mm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Christoph Hellwig <hch@xxxxxx>
Subject: mm: move debug checks from __vunmap to remove_vm_area
Date: Sat, 21 Jan 2023 08:10:49 +0100
All these checks apply to the free_vm_area interface as well, so move them
to the common routine.
Link: https://lkml.kernel.org/r/20230121071051.1143058-9-hch@xxxxxx
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@xxxxxxxxx>
Cc: Alexander Potapenko <glider@xxxxxxxxxx>
Cc: Andrey Konovalov <andreyknvl@xxxxxxxxx>
Cc: Andrey Ryabinin <ryabinin.a.a@xxxxxxxxx>
Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Cc: Vincenzo Frascino <vincenzo.frascino@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
--- a/mm/vmalloc.c~mm-move-debug-checks-from-__vunmap-to-remove_vm_area
+++ a/mm/vmalloc.c
@@ -2588,11 +2588,20 @@ struct vm_struct *remove_vm_area(const v
might_sleep();
+ if (WARN(!PAGE_ALIGNED(addr), "Trying to vfree() bad address (%p)\n",
+ addr))
+ return NULL;
+
va = find_unlink_vmap_area((unsigned long)addr);
if (!va || !va->vm)
return NULL;
vm = va->vm;
+
+ debug_check_no_locks_freed(vm->addr, get_vm_area_size(vm));
+ debug_check_no_obj_freed(vm->addr, get_vm_area_size(vm));
kasan_free_module_shadow(vm);
+ kasan_poison_vmalloc(vm->addr, get_vm_area_size(vm));
+
free_unmap_vmap_area(va);
return vm;
}
@@ -2664,10 +2673,6 @@ static void __vunmap(const void *addr, i
if (!addr)
return;
- if (WARN(!PAGE_ALIGNED(addr), "Trying to vfree() bad address (%p)\n",
- addr))
- return;
-
area = remove_vm_area(addr);
if (unlikely(!area)) {
WARN(1, KERN_ERR "Trying to vfree() nonexistent vm area (%p)\n",
@@ -2675,11 +2680,6 @@ static void __vunmap(const void *addr, i
return;
}
- debug_check_no_locks_freed(area->addr, get_vm_area_size(area));
- debug_check_no_obj_freed(area->addr, get_vm_area_size(area));
-
- kasan_poison_vmalloc(area->addr, get_vm_area_size(area));
-
vm_remove_mappings(area, deallocate_pages);
if (deallocate_pages) {
_
Patches currently in -mm which might be from hch@xxxxxx are
revert-remoteproc-qcom_q6v5_mss-map-unmap-metadata-region-before-after-use.patch
mm-reject-vmap-with-vm_flush_reset_perms.patch
mm-remove-__vfree.patch
mm-remove-__vfree_deferred.patch
mm-move-vmalloc_init-and-free_work-down-in-vmallocc.patch
mm-call-vfree-instead-of-__vunmap-from-delayed_vfree_work.patch
mm-move-__remove_vm_area-out-of-va_remove_mappings.patch
mm-use-remove_vm_area-in-__vunmap.patch
mm-move-debug-checks-from-__vunmap-to-remove_vm_area.patch
mm-split-__vunmap.patch
mm-refactor-va_remove_mappings.patch
