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From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	stable@vger.kernel.org, Marco Grassi <marco.gra@gmail.com>,
	Dan Carpenter <dan.carpenter@oracle.com>,
	Tomas Henzl <thenzl@redhat.com>,
	"Martin K. Petersen" <martin.petersen@oracle.com>
Subject: [PATCH 4.4 13/25] scsi: arcmsr: Buffer overflow in arcmsr_iop_message_xfer()
Date: Fri, 21 Oct 2016 11:16:04 +0200	[thread overview]
Message-ID: <20161021091413.907918848@linuxfoundation.org> (raw)
In-Reply-To: <20161021091413.053290730@linuxfoundation.org>

4.4-stable review patch.  If anyone has any objections, please let me know.

------------------

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.

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>

---
 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);

  parent reply	other threads:[~2016-10-21  9:16 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20161021091628uscas1p21e03f35d4481162f8066d9056c8aeb3c@uscas1p2.samsung.com>
2016-10-21  9:15 ` [PATCH 4.4 00/25] 4.4.27-stable review Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 01/25] serial: 8250_dw: Check the data->pclk when get apb_pclk Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 02/25] btrfs: assign error values to the correct bio structs Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 03/25] drivers: base: dma-mapping: page align the size when unmap_kernel_range Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 04/25] fuse: listxattr: verify xattr list Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 06/25] fuse: fix killing s[ug]id in setattr Greg Kroah-Hartman
2016-10-21  9:15   ` [PATCH 4.4 07/25] i40e: avoid NULL pointer dereference and recursive errors on early PCI error Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 09/25] ASoC: Intel: Atom: add a missing star in a memcpy call Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 10/25] reiserfs: Unlock superblock before calling reiserfs_quota_on_mount() Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 11/25] reiserfs: switch to generic_{get,set,remove}xattr() Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 12/25] async_pq_val: fix DMA memory leak Greg Kroah-Hartman
2016-10-21  9:16   ` Greg Kroah-Hartman [this message]
2016-10-21  9:16   ` [PATCH 4.4 14/25] scsi: arcmsr: Simplify user_len checking Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 15/25] scsi: ibmvfc: Fix I/O hang when port is not mapped Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 16/25] ext4: enforce online defrag restriction for encrypted files Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 17/25] ext4: reinforce check of i_dtime when clearing high fields of uid and gid Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 18/25] ext4: fix memory leak in ext4_insert_range() Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 19/25] ext4: allow DAX writeback for hole punch Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 20/25] ext4: release bh in make_indexed_dir Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 21/25] crypto: ghash-generic - move common definitions to a new header file Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 22/25] crypto: vmx - Fix memory corruption caused by p8_ghash Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 23/25] dlm: free workqueues after the connections Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 24/25] vfs: move permission checking into notify_change() for utimes(NULL) Greg Kroah-Hartman
2016-10-21  9:16   ` [PATCH 4.4 25/25] cfq: fix starvation of asynchronous writes Greg Kroah-Hartman
2016-10-21  9:16     ` Greg Kroah-Hartman
2016-10-21 15:44   ` [PATCH 4.4 00/25] 4.4.27-stable review Shuah Khan
2016-10-21 19:16   ` Guenter Roeck

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