From: Sunny Patel <nueralspacetech@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: David Hildenbrand <david@kernel.org>, 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>,
Balbir Singh <balbirs@nvidia.com>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Sunny Patel <nueralspacetech@gmail.com>,
stable@vger.kernel.org
Subject: [PATCH] mm/migrate_device: fix double unlock
Date: Tue, 14 Apr 2026 02:45:49 +0530 [thread overview]
Message-ID: <20260413211559.20969-1-nueralspacetech@gmail.com> (raw)
migrate_vma_collect_huge_pmd() calls spin_unlock(ptl) after
softleaf_entry_wait_on_locked(), which already releases the ptl.
Fixes: a30b48bf1b24 ("mm/migrate_device: implement THP migration of zone device pages")
Cc: stable@vger.kernel.org
Signed-off-by: Sunny Patel <nueralspacetech@gmail.com>
---
mm/migrate_device.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 8079676c8f1f..7eb2f87ea39d 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -177,7 +177,6 @@ static int migrate_vma_collect_huge_pmd(pmd_t *pmdp, unsigned long start,
if (softleaf_is_migration(entry)) {
softleaf_entry_wait_on_locked(entry, ptl);
- spin_unlock(ptl);
return -EAGAIN;
}
--
2.43.0
reply other threads:[~2026-04-13 21:16 UTC|newest]
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