Patch "MIPS: OCTEON: irq: Check for null return on kzalloc allocation" has been added to the 4.4-stable tree

Patch "MIPS: OCTEON: irq: Check for null return on kzalloc allocation" has been added to the 4.4-stable tree

[gregkh]

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

    MIPS: OCTEON: irq: Check for null return on kzalloc allocation

to the 4.4-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-octeon-irq-check-for-null-return-on-kzalloc-allocation.patch
and it can be found in the queue-4.4 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 902f4d067a50ccf645a58dd5fb1d113b6e0f9b5b Mon Sep 17 00:00:00 2001
From: Colin Ian King <colin.king@canonical.com>
Date: Thu, 22 Feb 2018 18:08:53 +0000
Subject: MIPS: OCTEON: irq: Check for null return on kzalloc allocation

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

commit 902f4d067a50ccf645a58dd5fb1d113b6e0f9b5b upstream.

The allocation of host_data is not null checked, leading to a null
pointer dereference if the allocation fails. Fix this by adding a null
check and return with -ENOMEM.

Fixes: 64b139f97c01 ("MIPS: OCTEON: irq: add CIB and other fixes")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: David Daney <david.daney@cavium.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: "Steven J. Hill" <Steven.Hill@cavium.com>
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 4.0+
Patchwork: https://patchwork.linux-mips.org/patch/18658/
Signed-off-by: James Hogan <jhogan@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 arch/mips/cavium-octeon/octeon-irq.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/arch/mips/cavium-octeon/octeon-irq.c
+++ b/arch/mips/cavium-octeon/octeon-irq.c
@@ -2246,6 +2246,8 @@ static int __init octeon_irq_init_cib(st
 	}
 
 	host_data = kzalloc(sizeof(*host_data), GFP_KERNEL);
+	if (!host_data)
+		return -ENOMEM;
 	raw_spin_lock_init(&host_data->lock);
 
 	addr = of_get_address(ciu_node, 0, NULL, NULL);


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

queue-4.4/mips-ath25-check-for-kzalloc-allocation-failure.patch
queue-4.4/mips-octeon-irq-check-for-null-return-on-kzalloc-allocation.patch