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@xxxxxxxxxx>
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@xxxxxxxxxx
Fixes: d7c9e99aee48 ("Reimplement RLIMIT_MEMLOCK on top of ucounts")
Signed-off-by: Miaohe Lin <linmiaohe@xxxxxxxxxx>
Reviewed-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Hugh Dickins <hughd@xxxxxxxxxx>
Cc: Herbert van den Bergh <herbert.van.den.bergh@xxxxxxxxxx>
Cc: Chris Mason <chris.mason@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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@xxxxxxxxxx are
mm-huge_memory-make-is_transparent_hugepage-static.patch
