Patch "MIPS: ath25: Check for kzalloc allocation failure" has been added to the 4.9-stable tree

Patch "MIPS: ath25: Check for kzalloc allocation failure" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    MIPS: ath25: Check for kzalloc allocation failure

to the 4.9-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     mips-ath25-check-for-kzalloc-allocation-failure.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 1b22b4b28fd5fbc51855219e3238b3ab81da8466 Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 22 Feb 2018 17:50:12 +0000
Subject: MIPS: ath25: Check for kzalloc allocation failure

From: Colin Ian King <colin.king@canonical.com>

commit 1b22b4b28fd5fbc51855219e3238b3ab81da8466 upstream.

Currently there is no null check on a failed allocation of board_data,
and hence a null pointer dereference will occurr. Fix this by checking
for the out of memory null pointer.

Fixes: a7473717483e ("MIPS: ath25: add board configuration detection")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.19+
Patchwork: https://patchwork.linux-mips.org/patch/18657/
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/ath25/board.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/mips/ath25/board.c
+++ b/arch/mips/ath25/board.c
@@ -135,6 +135,8 @@ int __init ath25_find_config(phys_addr_t
 	}
 
 	board_data = kzalloc(BOARD_CONFIG_BUFSZ, GFP_KERNEL);
+	if (!board_data)
+		goto error;
 	ath25_board.config = (struct ath25_boarddata *)board_data;
 	memcpy_fromio(board_data, bcfg, 0x100);
 	if (broken_boarddata) {


Patches currently in stable-queue which might be from colin.king@canonical.com are

queue-4.9/mips-ath25-check-for-kzalloc-allocation-failure.patch
queue-4.9/mips-octeon-irq-check-for-null-return-on-kzalloc-allocation.patch