This is a note to let you know that I've just added the patch titled
SCSI: libiscsi: fix potential buffer overrun in __iscsi_conn_send_pdu
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
scsi-libiscsi-fix-potential-buffer-overrun-in-__iscsi_conn_send_pdu.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From db9bfd64b14a3a8f1868d2164518fdeab1b26ad1 Mon Sep 17 00:00:00 2001
From: Mike Christie <michaelc@xxxxxxxxxxx>
Date: Wed, 3 Sep 2014 00:00:39 -0500
Subject: SCSI: libiscsi: fix potential buffer overrun in __iscsi_conn_send_pdu
From: Mike Christie <michaelc@xxxxxxxxxxx>
commit db9bfd64b14a3a8f1868d2164518fdeab1b26ad1 upstream.
This patches fixes a potential buffer overrun in __iscsi_conn_send_pdu.
This function is used by iscsi drivers and userspace to send iscsi PDUs/
commands. For login commands, we have a set buffer size. For all other
commands we do not support data buffers.
This was reported by Dan Carpenter here:
http://www.spinics.net/lists/linux-scsi/msg66838.html
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Signed-off-by: Mike Christie <michaelc@xxxxxxxxxxx>
Reviewed-by: Sagi Grimberg <sagig@xxxxxxxxxxxx>
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
Signed-off-by: James Bottomley <JBottomley@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/libiscsi.c | 10 ++++++++++
1 file changed, 10 insertions(+)
--- a/drivers/scsi/libiscsi.c
+++ b/drivers/scsi/libiscsi.c
@@ -717,11 +717,21 @@ __iscsi_conn_send_pdu(struct iscsi_conn
return NULL;
}
+ if (data_size > ISCSI_DEF_MAX_RECV_SEG_LEN) {
+ iscsi_conn_printk(KERN_ERR, conn, "Invalid buffer len of %u for login task. Max len is %u\n", data_size, ISCSI_DEF_MAX_RECV_SEG_LEN);
+ return NULL;
+ }
+
task = conn->login_task;
} else {
if (session->state != ISCSI_STATE_LOGGED_IN)
return NULL;
+ if (data_size != 0) {
+ iscsi_conn_printk(KERN_ERR, conn, "Can not send data buffer of len %u for op 0x%x\n", data_size, opcode);
+ return NULL;
+ }
+
BUG_ON(conn->c_stage == ISCSI_CONN_INITIAL_STAGE);
BUG_ON(conn->c_stage == ISCSI_CONN_STOPPED);
Patches currently in stable-queue which might be from michaelc@xxxxxxxxxxx are
queue-3.14/scsi-libiscsi-fix-potential-buffer-overrun-in-__iscsi_conn_send_pdu.patch
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