This is a note to let you know that I've just added the patch titled
clk: Fix memory leak in clk_unregister()
to the 5.4-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:
clk-fix-memory-leak-in-clk_unregister.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 1eccd3bcfd1142d1a8de126ed1e14c4f533400d6
Author: Kishon Vijay Abraham I <kishon@xxxxxx>
Date: Tue Oct 22 12:41:53 2019 +0530
clk: Fix memory leak in clk_unregister()
[ Upstream commit 8247470772beb38822f226c99a2ed8c195f6b438 ]
Memory allocated in alloc_clk() for 'struct clk' and
'const char *con_id' while invoking clk_register() is never freed
in clk_unregister(), resulting in kmemleak showing the following
backtrace.
backtrace:
[<00000000546f5dd0>] kmem_cache_alloc+0x18c/0x270
[<0000000073a32862>] alloc_clk+0x30/0x70
[<0000000082942480>] __clk_register+0xc8/0x760
[<000000005c859fca>] devm_clk_register+0x54/0xb0
[<00000000868834a8>] 0xffff800008c60950
[<00000000d5a80534>] platform_drv_probe+0x50/0xa0
[<000000001b3889fc>] really_probe+0x108/0x348
[<00000000953fa60a>] driver_probe_device+0x58/0x100
[<0000000008acc17c>] device_driver_attach+0x6c/0x90
[<0000000022813df3>] __driver_attach+0x84/0xc8
[<00000000448d5443>] bus_for_each_dev+0x74/0xc8
[<00000000294aa93f>] driver_attach+0x20/0x28
[<00000000e5e52626>] bus_add_driver+0x148/0x1f0
[<000000001de21efc>] driver_register+0x60/0x110
[<00000000af07c068>] __platform_driver_register+0x40/0x48
[<0000000060fa80ee>] 0xffff800008c66020
Fix it here.
Cc: Tomi Valkeinen <tomi.valkeinen@xxxxxx>
Cc: Tero Kristo <t-kristo@xxxxxx>
Signed-off-by: Kishon Vijay Abraham I <kishon@xxxxxx>
Link: https://lkml.kernel.org/r/20191022071153.21118-1-kishon@xxxxxx
Fixes: 1df4046a93e0 ("clk: Combine __clk_get() and __clk_create_clk()")
Signed-off-by: Stephen Boyd <sboyd@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
index 1c677d7f7f53..2f2eea26c375 100644
--- a/drivers/clk/clk.c
+++ b/drivers/clk/clk.c
@@ -3879,6 +3879,7 @@ void clk_unregister(struct clk *clk)
__func__, clk->core->name);
kref_put(&clk->core->ref, __clk_release);
+ free_clk(clk);
unlock:
clk_prepare_unlock();
}
