42 lines
1.5 KiB
Diff
42 lines
1.5 KiB
Diff
|
From: Dan Carpenter <dan.carpenter@oracle.com>
|
||
|
|
Date: 2016-09-15 13:44:56
|
||
|
|
Subject: [patch v2] arcmsr: buffer overflow in arcmsr_iop_message_xfer()
|
||
|
|
|
||
|
|
We need to put an upper bound on "user_len" so the memcpy() doesn't
|
||
|
|
overflow.
|
||
|
|
|
||
|
|
Reported-by: Marco Grassi <marco.gra@gmail.com>
|
||
|
|
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
|
||
|
|
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
|
||
|
|
|
||
|
|
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c
|
||
|
|
index 7640498..110eca9 100644
|
||
|
|
--- a/drivers/scsi/arcmsr/arcmsr_hba.c
|
||
|
|
+++ b/drivers/scsi/arcmsr/arcmsr_hba.c
|
||
|
|
@@ -2388,7 +2388,8 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
|
||
|
|
}
|
||
|
|
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) {
|
||
|
|
@@ -2397,6 +2398,11 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb,
|
||
|
|
}
|
||
|
|
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);
|
||
|
|
--
|
||
|
|
To unsubscribe from this list: send the line "unsubscribe linux-scsi" in
|
||
|
|
the body of a message to majordomo@vger.kernel.org
|
||
|
|
More majordomo info at http://vger.kernel.org/majordomo-info.html
|