| From | Willy Tarreau <> | Subject | [PATCH 3.10 147/319] scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer() | Date | Sun, 5 Feb 2017 20:19:29 +0100 |
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From: Dan Carpenter <dan.carpenter@oracle.com>
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> --- drivers/scsi/arcmsr/arcmsr_hba.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 1822cb9..66dda86 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; -- 2.8.0.rc2.1.gbe9624a
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