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clk: fix leak on devm_clk_bulk_get_all() unwind 

commit f828b0bcacef189edbd247e9f48864fc36bfbe33 upstream.

clk_bulk_get_all() allocates an array of struct clk_bulk data for us
(unlike clk_bulk_get()), so we need to free it. Let's use the
clk_bulk_put_all() helper.

kmemleak complains, on an RK3399 Gru/Kevin system:

unreferenced object 0xffffff80045def00 (size 128):
  comm "swapper/0", pid 1, jiffies 4294667682 (age 86.394s)
  hex dump (first 32 bytes):
    44 32 60 fe fe ff ff ff 00 00 00 00 00 00 00 00  D2`.............
    48 32 60 fe fe ff ff ff 00 00 00 00 00 00 00 00  H2`.............
  backtrace:
    [<00000000742860d6>] __kmalloc+0x22c/0x39c
    [<00000000b0493f2c>] clk_bulk_get_all+0x64/0x188
    [<00000000325f5900>] devm_clk_bulk_get_all+0x58/0xa8
    [<00000000175b9bc5>] dwc3_probe+0x8ac/0xb5c
    [<000000009169e2f9>] platform_drv_probe+0x9c/0xbc
    [<000000005c51e2ee>] really_probe+0x13c/0x378
    [<00000000c47b1f24>] driver_probe_device+0x84/0xc0
    [<00000000f870fcfb>] __device_attach_driver+0x94/0xb0
    [<000000004d1b92ae>] bus_for_each_drv+0x8c/0xd8
    [<00000000481d60c3>] __device_attach+0xc4/0x150
    [<00000000a163bd36>] device_initial_probe+0x1c/0x28
    [<00000000accb6bad>] bus_probe_device+0x3c/0x9c
    [<000000001a199f89>] device_add+0x218/0x3cc
    [<000000001bd84952>] of_device_add+0x40/0x50
    [<000000009c658c29>] of_platform_device_create_pdata+0xac/0x100
    [<0000000021c69ba4>] of_platform_bus_create+0x190/0x224

Fixes: f08c2e2865 ("clk: add managed version of clk_bulk_get_all")
Cc: Dong Aisheng <aisheng.dong@nxp.com>
Cc: stable@vger.kernel.org
Signed-off-by: Brian Norris <briannorris@chromium.org>
Link: https://lore.kernel.org/r/20210731025950.2238582-1-briannorris@chromium.org
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Brian Norris 2021-07-30 19:59:50 -07:00 committed by Greg Kroah-Hartman
parent ed5c9a49e6
commit 8d1191f924
1 changed files with 8 additions and 1 deletions
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9
drivers/clk/clk-devres.c
View File

@ -92,13 +92,20 @@ int __must_check devm_clk_bulk_get_optional(struct device *dev, int num_clks,
}
EXPORT_SYMBOL_GPL(devm_clk_bulk_get_optional);
static void devm_clk_bulk_release_all(struct device *dev, void *res)
{
struct clk_bulk_devres *devres = res;
clk_bulk_put_all(devres->num_clks, devres->clks);
}
int __must_check devm_clk_bulk_get_all(struct device *dev,
struct clk_bulk_data **clks)
{
struct clk_bulk_devres *devres;
int ret;
devres = devres_alloc(devm_clk_bulk_release,
devres = devres_alloc(devm_clk_bulk_release_all,
sizeof(*devres), GFP_KERNEL);
if (!devres)
return -ENOMEM;