linux-kernel - [PATCH] mm: /proc/pid/smaps_rollup: fix maple tree search

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Message-ID: <3011bee7-182-97a2-1083-d5f5b688e54b@google.com>
Date:   Tue, 18 Oct 2022 20:18:38 -0700 (PDT)
From:   Hugh Dickins <hughd@...gle.com>
To:     Andrew Morton <akpm@...ux-foundation.org>
cc:     Matthew Wilcox <willy@...radead.org>,
        "Liam R. Howlett" <Liam.Howlett@...cle.com>,
        Alexey Dobriyan <adobriyan@...il.com>,
        Seth Jenkins <sethjenkins@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org
Subject: [PATCH] mm: /proc/pid/smaps_rollup: fix maple tree search

/proc/pid/smaps_rollup showed 0 kB for everything: now find first vma.

Fixes: c4c84f06285e ("fs/proc/task_mmu: stop using linked list and highest_vm_end")
Signed-off-by: Hugh Dickins <hughd@...gle.com>
---

 fs/proc/task_mmu.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- 6.1-rc1/fs/proc/task_mmu.c
+++ linux/fs/proc/task_mmu.c
@@ -902,7 +902,7 @@ static int show_smaps_rollup(struct seq_
 		goto out_put_mm;
 
 	hold_task_mempolicy(priv);
-	vma = mas_find(&mas, 0);
+	vma = mas_find(&mas, ULONG_MAX);
 
 	if (unlikely(!vma))
 		goto empty_set;