From 7898db22ed6cee909513cf4935b5f9f0298b74f0 Mon Sep 17 00:00:00 2001 From: Jiasheng Jiang Date: Wed, 23 Nov 2022 16:48:46 +0800 Subject: [PATCH] fs/ntfs3: Add check for kmemdup [ Upstream commit e6c3cef24cb0d045f99d5cb039b344874e3cfd74 ] Since the kmemdup may return NULL pointer, it should be better to add check for the return value in order to avoid NULL pointer dereference. Fixes: b46acd6a6a62 ("fs/ntfs3: Add NTFS journal") Signed-off-by: Jiasheng Jiang Signed-off-by: Konstantin Komarov Signed-off-by: Sasha Levin --- fs/ntfs3/fslog.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/ntfs3/fslog.c b/fs/ntfs3/fslog.c index c662d2a..422057d 100644 --- a/fs/ntfs3/fslog.c +++ b/fs/ntfs3/fslog.c @@ -4258,6 +4258,10 @@ check_attribute_names: rec_len -= t32; attr_names = kmemdup(Add2Ptr(lrh, t32), rec_len, GFP_NOFS); + if (!attr_names) { + err = -ENOMEM; + goto out; + } lcb_put(lcb); lcb = NULL; -- 2.7.4