[merged mm-hotfixes-stable] ucounts-fix-counter-leak-in-inc_rlimit_get_ucounts.patch removed from -mm tree

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The quilt patch titled
     Subject: ucounts: fix counter leak in inc_rlimit_get_ucounts()
has been removed from the -mm tree.  Its filename was
     ucounts-fix-counter-leak-in-inc_rlimit_get_ucounts.patch

This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

------------------------------------------------------
From: Andrei Vagin <avagin@xxxxxxxxxx>
Subject: ucounts: fix counter leak in inc_rlimit_get_ucounts()
Date: Fri, 1 Nov 2024 19:19:40 +0000

The inc_rlimit_get_ucounts() increments the specified rlimit counter and
then checks its limit.  If the value exceeds the limit, the function
returns an error without decrementing the counter.

Link: https://lkml.kernel.org/r/20241101191940.3211128-1-roman.gushchin@xxxxxxxxx
Fixes: 15bc01effefe ("ucounts: Fix signal ucount refcounting")
Signed-off-by: Andrei Vagin <avagin@xxxxxxxxxx>
Co-developed-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Signed-off-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Tested-by: Roman Gushchin <roman.gushchin@xxxxxxxxx>
Acked-by: Alexey Gladkov <legion@xxxxxxxxxx>
Cc: Kees Cook <kees@xxxxxxxxxx>
Cc: Andrei Vagin <avagin@xxxxxxxxxx>
Cc: "Eric W. Biederman" <ebiederm@xxxxxxxxxxxx>
Cc: Alexey Gladkov <legion@xxxxxxxxxx>
Cc: Oleg Nesterov <oleg@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 kernel/ucount.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/kernel/ucount.c~ucounts-fix-counter-leak-in-inc_rlimit_get_ucounts
+++ a/kernel/ucount.c
@@ -317,7 +317,7 @@ long inc_rlimit_get_ucounts(struct ucoun
 	for (iter = ucounts; iter; iter = iter->ns->ucounts) {
 		long new = atomic_long_add_return(1, &iter->rlimit[type]);
 		if (new < 0 || new > max)
-			goto unwind;
+			goto dec_unwind;
 		if (iter == ucounts)
 			ret = new;
 		max = get_userns_rlimit_max(iter->ns, type);
@@ -334,7 +334,6 @@ long inc_rlimit_get_ucounts(struct ucoun
 dec_unwind:
 	dec = atomic_long_sub_return(1, &iter->rlimit[type]);
 	WARN_ON_ONCE(dec < 0);
-unwind:
 	do_dec_rlimit_put_ucounts(ucounts, iter, type);
 	return 0;
 }
_

Patches currently in -mm which might be from avagin@xxxxxxxxxx are






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