The patch titled
Subject: mm: kvrealloc: disable KASAN when switching to vmalloc
has been added to the -mm mm-unstable branch. Its filename is
mm-kvmalloc-align-kvrealloc-with-krealloc-fix-2.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/mm-kvmalloc-align-kvrealloc-with-krealloc-fix-2.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: Danilo Krummrich <dakr@xxxxxxxxxx>
Subject: mm: kvrealloc: disable KASAN when switching to vmalloc
Date: Tue, 30 Jul 2024 20:49:41 +0200
Disable KASAN accessibility checks when switching from a kmalloc buffer
to a vmalloc buffer.
Link: https://lkml.kernel.org/r/20240730185049.6244-2-dakr@xxxxxxxxxx
Fixes: 923a26b4c679 ("mm: kvmalloc: align kvrealloc() with krealloc()")
Signed-off-by: Danilo Krummrich <dakr@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/util.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
--- a/mm/util.c~mm-kvmalloc-align-kvrealloc-with-krealloc-fix-2
+++ a/mm/util.c
@@ -753,7 +753,10 @@ void *kvrealloc_noprof(const void *p, si
if (p) {
/* We already know that `p` is not a vmalloc address. */
- memcpy(n, p, ksize(p));
+ kasan_disable_current();
+ memcpy(n, kasan_reset_tag(p), ksize(p));
+ kasan_enable_current();
+
kfree(p);
}
}
_
Patches currently in -mm which might be from dakr@xxxxxxxxxx are
mm-vmalloc-implement-vrealloc.patch
mm-vmalloc-implement-vrealloc-fix.patch
mm-vmalloc-implement-vrealloc-fix-2.patch
mm-kvmalloc-align-kvrealloc-with-krealloc.patch
mm-kvmalloc-align-kvrealloc-with-krealloc-fix.patch
mm-kvmalloc-align-kvrealloc-with-krealloc-fix-2.patch
