linux-kernel - [PATCH AUTOSEL 6.12 095/486] hypfs_create_cpu_files(): add missing check for hypfs

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Message-Id: <20250505223922.2682012-95-sashal@kernel.org>
Date: Mon,  5 May 2025 18:32:51 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Al Viro <viro@...iv.linux.org.uk>,
	Sasha Levin <sashal@...nel.org>,
	hca@...ux.ibm.com,
	gor@...ux.ibm.com,
	agordeev@...ux.ibm.com,
	linux-s390@...r.kernel.org
Subject: [PATCH AUTOSEL 6.12 095/486] hypfs_create_cpu_files(): add missing check for hypfs_mkdir() failure

From: Al Viro <viro@...iv.linux.org.uk>

[ Upstream commit 00cdfdcfa0806202aea56b02cedbf87ef1e75df8 ]

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 arch/s390/hypfs/hypfs_diag_fs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/s390/hypfs/hypfs_diag_fs.c b/arch/s390/hypfs/hypfs_diag_fs.c
index 00a6d370a2803..280266a74f378 100644
--- a/arch/s390/hypfs/hypfs_diag_fs.c
+++ b/arch/s390/hypfs/hypfs_diag_fs.c
@@ -208,6 +208,8 @@ static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
 	snprintf(buffer, TMP_SIZE, "%d", cpu_info__cpu_addr(diag204_get_info_type(),
 							    cpu_info));
 	cpu_dir = hypfs_mkdir(cpus_dir, buffer);
+	if (IS_ERR(cpu_dir))
+		return PTR_ERR(cpu_dir);
 	rc = hypfs_create_u64(cpu_dir, "mgmtime",
 			      cpu_info__acc_time(diag204_get_info_type(), cpu_info) -
 			      cpu_info__lp_time(diag204_get_info_type(), cpu_info));
-- 
2.39.5