+ selftests-cgroup-fix-unsigned-comparison-with-less-than-zero.patch added to mm-nonmm-unstable branch

+ selftests-cgroup-fix-unsigned-comparison-with-less-than-zero.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: selftests: cgroup: fix unsigned comparison with less than zero
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     selftests-cgroup-fix-unsigned-comparison-with-less-than-zero.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/selftests-cgroup-fix-unsigned-comparison-with-less-than-zero.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: YueHaibing <yuehaibing@huawei.com>
Subject: selftests: cgroup: fix unsigned comparison with less than zero
Date: Sat, 5 Nov 2022 19:06:11 +0800

'size' is unsigned, it never less than zero.

Link: https://lkml.kernel.org/r/20221105110611.28920-1-yuehaibing@huawei.com
Fixes: 6c26df84e1f2 ("selftests: cgroup: return -errno from cg_read()/cg_write() on failure")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Yosry Ahmed <yosryahmed@google.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Roman Gushchin <roman.gushchin@linux.dev>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: zefan li <lizefan.x@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 tools/testing/selftests/cgroup/cgroup_util.c |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- a/tools/testing/selftests/cgroup/cgroup_util.c~selftests-cgroup-fix-unsigned-comparison-with-less-than-zero
+++ a/tools/testing/selftests/cgroup/cgroup_util.c
@@ -555,6 +555,7 @@ int proc_mount_contains(const char *opti
 ssize_t proc_read_text(int pid, bool thread, const char *item, char *buf, size_t size)
 {
 	char path[PATH_MAX];
+	ssize_t ret;
 
 	if (!pid)
 		snprintf(path, sizeof(path), "/proc/%s/%s",
@@ -562,8 +563,8 @@ ssize_t proc_read_text(int pid, bool thr
 	else
 		snprintf(path, sizeof(path), "/proc/%d/%s", pid, item);
 
-	size = read_text(path, buf, size);
-	return size < 0 ? -1 : size;
+	ret = read_text(path, buf, size);
+	return ret < 0 ? -1 : ret;
 }
 
 int proc_read_strstr(int pid, bool thread, const char *item, const char *needle)
_

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

selftests-cgroup-fix-unsigned-comparison-with-less-than-zero.patch