From: Matthew Wilcox <willy@infradead.org>
To: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
Zi Yan <ziy@nvidia.com>, Kairui Song <ryncsn@gmail.com>,
Jan Kara <jack@suse.cz>, David Hildenbrand <david@kernel.org>,
Kiryl Shutsemau <kas@kernel.org>,
Chris Arges <carges@cloudflare.com>,
linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org
Subject: Re: [PATCH] mm/filemap: __filemap_add_folio() restore index before retrying
Date: Tue, 28 Jul 2026 14:22:05 +0100 [thread overview]
Message-ID: <amis_VNEmkifOAoI@casper.infradead.org> (raw)
In-Reply-To: <562fbfa6-dd6d-0b6a-2461-ed2ff1173bc8@google.com>
On Mon, Jul 27, 2026 at 10:24:14PM -0700, Hugh Dickins wrote:
> Production was suffering from rare SIGILLs and SIGSEGVs, executable text
> found a page away from where it belonged, !folio_contains() bug hit when
> debug enabled: symptoms not seen since this patch went in.
That can't have been fun to find. Thanks, Hugh!
> Fixes: 200a89c159a7 ("mm/filemap: use xas_try_split() in __filemap_add_folio()")
> Signed-off-by: Hugh Dickins <hughd@google.com>
> Cc: stable@vger.kernel.org
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
next prev parent reply other threads:[~2026-07-28 13:22 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-28 5:24 [PATCH] mm/filemap: __filemap_add_folio() restore index before retrying Hugh Dickins
2026-07-28 10:24 ` Kiryl Shutsemau
2026-07-28 13:22 ` Matthew Wilcox [this message]
2026-07-28 15:29 ` Zi Yan
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