This is a note to let you know that I've just added the patch titled
scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer()
to the 4.4-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-arcmsr-buffer-overflow-in-arcmsr_iop_message_xfer.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 7bc2b55a5c030685b399bb65b6baa9ccc3d1f167 Mon Sep 17 00:00:00 2001
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Date: Thu, 15 Sep 2016 16:44:56 +0300
Subject: scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer()
From: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
commit 7bc2b55a5c030685b399bb65b6baa9ccc3d1f167 upstream.
We need to put an upper bound on "user_len" so the memcpy() doesn't
overflow.
Reported-by: Marco Grassi <marco.gra@xxxxxxxxx>
Signed-off-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Reviewed-by: Tomas Henzl <thenzl@xxxxxxxxxx>
Signed-off-by: Martin K. Petersen <martin.petersen@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/scsi/arcmsr/arcmsr_hba.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
@@ -2297,7 +2297,8 @@ static int arcmsr_iop_message_xfer(struc
}
case ARCMSR_MESSAGE_WRITE_WQBUFFER: {
unsigned char *ver_addr;
- int32_t user_len, cnt2end;
+ uint32_t user_len;
+ int32_t cnt2end;
uint8_t *pQbuffer, *ptmpuserbuffer;
ver_addr = kmalloc(ARCMSR_API_DATA_BUFLEN, GFP_ATOMIC);
if (!ver_addr) {
@@ -2306,6 +2307,11 @@ static int arcmsr_iop_message_xfer(struc
}
ptmpuserbuffer = ver_addr;
user_len = pcmdmessagefld->cmdmessage.Length;
+ if (user_len > ARCMSR_API_DATA_BUFLEN) {
+ retvalue = ARCMSR_MESSAGE_FAIL;
+ kfree(ver_addr);
+ goto message_out;
+ }
memcpy(ptmpuserbuffer,
pcmdmessagefld->messagedatabuffer, user_len);
spin_lock_irqsave(&acb->wqbuffer_lock, flags);
Patches currently in stable-queue which might be from dan.carpenter@xxxxxxxxxx are
queue-4.4/scsi-arcmsr-simplify-user_len-checking.patch
queue-4.4/scsi-arcmsr-buffer-overflow-in-arcmsr_iop_message_xfer.patch
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