[merged] mm-mlock-fix-potential-imbalanced-rlimit-ucounts-adjustment.patch removed from -mm tree

[merged] mm-mlock-fix-potential-imbalanced-rlimit-ucounts-adjustment.patch removed from -mm tree

[Andrew Morton]

The patch titled
     Subject: mm/mlock: fix potential imbalanced rlimit ucounts adjustment
has been removed from the -mm tree.  Its filename was
     mm-mlock-fix-potential-imbalanced-rlimit-ucounts-adjustment.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
From: Miaohe Lin <linmiaohe@huawei.com>
Subject: mm/mlock: fix potential imbalanced rlimit ucounts adjustment

user_shm_lock forgets to set allowed to 0 when get_ucounts fails. So
the later user_shm_unlock might do the extra dec_rlimit_ucounts. Fix
this by resetting allowed to 0.

Link: https://lkml.kernel.org/r/20220310132417.41189-1-linmiaohe@huawei.com
Fixes: d7c9e99aee48 ("Reimplement RLIMIT_MEMLOCK on top of ucounts")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Hugh Dickins <hughd@google.com>
Cc: Herbert van den Bergh <herbert.van.den.bergh@oracle.com>
Cc: Chris Mason <chris.mason@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/mlock.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/mlock.c~mm-mlock-fix-potential-imbalanced-rlimit-ucounts-adjustment
+++ a/mm/mlock.c
@@ -839,6 +839,7 @@ int user_shm_lock(size_t size, struct uc
 	}
 	if (!get_ucounts(ucounts)) {
 		dec_rlimit_ucounts(ucounts, UCOUNT_RLIMIT_MEMLOCK, locked);
+		allowed = 0;
 		goto out;
 	}
 	allowed = 1;
_

Patches currently in -mm which might be from linmiaohe@huawei.com are

mm-huge_memory-make-is_transparent_hugepage-static.patch