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Fri, 20 Sep 2024 18:13:07 -0700 (PDT) Received: from gmail.com ([24.130.68.0]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-207945da7b8sm100732825ad.16.2024.09.20.18.13.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 20 Sep 2024 18:13:07 -0700 (PDT) Date: Fri, 20 Sep 2024 18:13:05 -0700 From: Chang Yu To: dhowells@redhat.com Cc: jlayton@kernel.org, netfs@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, marcus.yu.56@gmail.com, skhan@linuxfoundation.org Subject: [PATCH] netfs: Fix a KMSAN uninit-value error in netfs_clear_buffer Message-ID: Precedence: bulk X-Mailing-List: netfs@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Use kzalloc instead of kmalloc in netfs_buffer_append_folio to fix a KMSAN uninit-value error in netfs_clear_buffer Signed-off-by: Chang Yu Reported-by: syzbot+921873345a95f4dae7e9@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=921873345a95f4dae7e9 Fixes: cd0277ed0c18 ("netfs: Use new folio_queue data type and iterator instead of xarray iter") --- fs/netfs/misc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/netfs/misc.c b/fs/netfs/misc.c index 0ad0982ce0e2..6f967b6d30b6 100644 --- a/fs/netfs/misc.c +++ b/fs/netfs/misc.c @@ -22,7 +22,7 @@ int netfs_buffer_append_folio(struct netfs_io_request *rreq, struct folio *folio return -EIO; if (!tail || folioq_full(tail)) { - tail = kmalloc(sizeof(*tail), GFP_NOFS); + tail = kzalloc(sizeof(*tail), GFP_NOFS); if (!tail) return -ENOMEM; netfs_stat(&netfs_n_folioq); -- 2.46.0