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| author | Dan Carpenter <dan.carpenter@oracle.com> | 2016-09-15 16:44:56 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-10-22 12:06:48 +0200 |
| commit | 6e3655655623c52a8a55cec01be8cf6681ee54a3 (patch) | |
| tree | 9ea5b94a94a8b01d465cf0d359c1b5deb37eeb9b | |
| parent | 2ea1e5b248e29791ec72a5cf9eb6b28fe315ee76 (diff) | |
| download | linux-stable-6e3655655623c52a8a55cec01be8cf6681ee54a3.tar.gz linux-stable-6e3655655623c52a8a55cec01be8cf6681ee54a3.tar.bz2 linux-stable-6e3655655623c52a8a55cec01be8cf6681ee54a3.zip | |
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.
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: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -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 7640498964a5..110eca9eaca0 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); |