From 801ab13d50cf3d26170ee073ea8bb4eececb76ab Mon Sep 17 00:00:00 2001 From: Tomas Henzl Date: Thu, 2 Feb 2023 17:24:50 +0100 Subject: scsi: ses: Fix possible desc_ptr out-of-bounds accesses Sanitize possible desc_ptr out-of-bounds accesses in ses_enclosure_data_process(). Link: https://lore.kernel.org/r/20230202162451.15346-4-thenzl@redhat.com Cc: stable@vger.kernel.org Signed-off-by: Tomas Henzl Signed-off-by: Martin K. Petersen --- drivers/scsi/ses.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) (limited to 'drivers') diff --git a/drivers/scsi/ses.c b/drivers/scsi/ses.c index 458ca7abbbef..f8031d0782f7 100644 --- a/drivers/scsi/ses.c +++ b/drivers/scsi/ses.c @@ -578,15 +578,19 @@ static void ses_enclosure_data_process(struct enclosure_device *edev, int max_desc_len; if (desc_ptr) { - if (desc_ptr >= buf + page7_len) { + if (desc_ptr + 3 >= buf + page7_len) { desc_ptr = NULL; } else { len = (desc_ptr[2] << 8) + desc_ptr[3]; desc_ptr += 4; - /* Add trailing zero - pushes into - * reserved space */ - desc_ptr[len] = '\0'; - name = desc_ptr; + if (desc_ptr + len > buf + page7_len) + desc_ptr = NULL; + else { + /* Add trailing zero - pushes into + * reserved space */ + desc_ptr[len] = '\0'; + name = desc_ptr; + } } } if (type_ptr[0] == ENCLOSURE_COMPONENT_DEVICE || -- cgit v1.2.3