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

clk: fix a panic error caused by accessing NULL pointer

to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: clk-fix-a-panic-error-caused-by-accessing-null-pointer.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 foo@baz Fri Feb 23 11:58:50 CET 2018

From: Cai Li cai.li@spreadtrum.com Date: Tue, 21 Nov 2017 17:24:38 +0800 Subject: clk: fix a panic error caused by accessing NULL pointer

From: Cai Li cai.li@spreadtrum.com

[ Upstream commit 975b820b6836b6b6c42fb84cd2e772e2b41bca67 ]

In some cases the clock parent would be set NULL when doing re-parent, it will cause a NULL pointer accessing if clk_set trace event is enabled.

This patch sets the parent as "none" if the input parameter is NULL.

Fixes: dfc202ead312 (clk: Add tracepoints for hardware operations) Signed-off-by: Cai Li cai.li@spreadtrum.com Signed-off-by: Chunyan Zhang chunyan.zhang@spreadtrum.com Signed-off-by: Stephen Boyd sboyd@codeaurora.org Signed-off-by: Sasha Levin alexander.levin@microsoft.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- include/trace/events/clk.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)

--- a/include/trace/events/clk.h +++ b/include/trace/events/clk.h @@ -134,12 +134,12 @@ DECLARE_EVENT_CLASS(clk_parent,

TP_STRUCT__entry( __string( name, core->name ) - __string( pname, parent->name ) + __string( pname, parent ? parent->name : "none" ) ),

TP_fast_assign( __assign_str(name, core->name); - __assign_str(pname, parent->name); + __assign_str(pname, parent ? parent->name : "none"); ),

TP_printk("%s %s", __get_str(name), __get_str(pname))

Patches currently in stable-queue which might be from cai.li@spreadtrum.com are

queue-4.4/clk-fix-a-panic-error-caused-by-accessing-null-pointer.patch