From: "David Hildenbrand (Arm)" <david@kernel.org>
To: Sunny Patel <nueralspacetech@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>
Cc: Zi Yan <ziy@nvidia.com>, Matthew Brost <matthew.brost@intel.com>,
Joshua Hahn <joshua.hahnjy@gmail.com>,
Rakie Kim <rakie.kim@sk.com>, Byungchul Park <byungchul@sk.com>,
Gregory Price <gourry@gourry.net>,
Ying Huang <ying.huang@linux.alibaba.com>,
Alistair Popple <apopple@nvidia.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] mm/migrate_device: fix spinlock leak in migrate_vma_insert_huge_pmd_page
Date: Mon, 27 Apr 2026 12:18:57 +0200 [thread overview]
Message-ID: <8c9069b0-6668-43fd-ace0-c707d7aff082@kernel.org> (raw)
In-Reply-To: <20260425133537.17463-1-nueralspacetech@gmail.com>
On 4/25/26 15:35, Sunny Patel wrote:
> When check_stable_address_space() fails after the PMD spinlock has
> been acquired via pmd_lock(), the code jumps directly to the abort
> label, bypassing the spin_unlock() call in unlock_abort. This causes
> the PMD spinlock to be permanently held, leading to a deadlock.
>
> Change the goto target from abort to unlock_abort to ensure the
> spinlock is always released on this error path.
>
> Signed-off-by: Sunny Patel <nueralspacetech@gmail.com>
> ---
Thanks!
Acked-by: David Hildenbrand (Arm) <david@kernel.org>
--
Cheers,
David
prev parent reply other threads:[~2026-04-27 10:19 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-25 13:35 [PATCH] mm/migrate_device: fix spinlock leak in migrate_vma_insert_huge_pmd_page Sunny Patel
2026-04-25 13:54 ` Andrew Morton
2026-04-26 0:50 ` Balbir Singh
2026-04-25 14:21 ` Zi Yan
2026-04-27 10:18 ` David Hildenbrand (Arm) [this message]
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