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Message-ID: <ba97a544-eef8-4e48-8c8c-fe73fff6ae15@collabora.com>
Date: Fri, 14 Jun 2024 12:09:04 +0500
From: Muhammad Usama Anjum <usama.anjum@...labora.com>
To: Dan Carpenter <dan.carpenter@...aro.org>,
David Hildenbrand <david@...hat.com>
Cc: Muhammad Usama Anjum <usama.anjum@...labora.com>,
Andrew Morton <akpm@...ux-foundation.org>,
Matthew Wilcox <willy@...radead.org>, Andrei Vagin <avagin@...gle.com>,
Ryan Roberts <ryan.roberts@....com>, Hugh Dickins <hughd@...gle.com>,
Kefeng Wang <wangkefeng.wang@...wei.com>, linux-kernel@...r.kernel.org,
linux-fsdevel@...r.kernel.org, kernel-janitors@...r.kernel.org
Subject: Re: [PATCH] fs/proc/task_mmu: fix uninitialized variable in
pagemap_pmd_range()
On 6/13/24 7:34 PM, Dan Carpenter wrote:
> The "folio" pointer is tested for NULL, but it's either valid or
> uninitialized. Initialize it to NULL.
>
> Fixes: 84f57f8b8914 ("fs/proc: move page_mapcount() to fs/proc/internal.h")
> Signed-off-by: Dan Carpenter <dan.carpenter@...aro.org>
> ---
> fs/proc/task_mmu.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
> index 631371cb80a0..6ed1f56b32b4 100644
> --- a/fs/proc/task_mmu.c
> +++ b/fs/proc/task_mmu.c
> @@ -1492,7 +1492,7 @@ static int pagemap_pmd_range(pmd_t *pmdp, unsigned long addr, unsigned long end,
> u64 flags = 0, frame = 0;
> pmd_t pmd = *pmdp;
> struct page *page = NULL;
> - struct folio *folio;
> + struct folio *folio = NULL;
>
> if (vma->vm_flags & VM_SOFTDIRTY)
> flags |= PM_SOFT_DIRTY;
Reviewed-by: Muhammad Usama Anjum <usama.anjum@...labora.com>
--
BR,
Muhammad Usama Anjum
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