diff options
| author | Dan Carpenter <dan.carpenter@oracle.com> | 2016-09-15 16:44:56 +0300 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:14 +0200 |
| commit | 83ef995089564f34bfe17e83e931df9601ff3f3d (patch) | |
| tree | d578f8ec0bd746ffbda2f74d37364dc4448b1d7d | |
| parent | 94d308de6eca432520e1cc36d215e2ffeffeee1b (diff) | |
scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer()
commit 7bc2b55a5c030685b399bb65b6baa9ccc3d1f167 upstream.
We need to put an upper bound on "user_len" so the memcpy() doesn't
overflow.
[js] no ARCMSR_API_DATA_BUFLEN defined, use the number
Reported-by: Marco Grassi <marco.gra@gmail.com>
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 1822cb9ec..66dda86e6 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -1803,7 +1803,8 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, case ARCMSR_MESSAGE_WRITE_WQBUFFER: { unsigned char *ver_addr; - int32_t my_empty_len, user_len, wqbuf_firstindex, wqbuf_lastindex; + uint32_t user_len; + int32_t my_empty_len, wqbuf_firstindex, wqbuf_lastindex; uint8_t *pQbuffer, *ptmpuserbuffer; ver_addr = kmalloc(1032, GFP_ATOMIC); @@ -1820,6 +1821,11 @@ static int arcmsr_iop_message_xfer(struct AdapterControlBlock *acb, } ptmpuserbuffer = ver_addr; user_len = pcmdmessagefld->cmdmessage.Length; + if (user_len > 1032) { + retvalue = ARCMSR_MESSAGE_FAIL; + kfree(ver_addr); + goto message_out; + } memcpy(ptmpuserbuffer, pcmdmessagefld->messagedatabuffer, user_len); wqbuf_lastindex = acb->wqbuf_lastindex; wqbuf_firstindex = acb->wqbuf_firstindex; |