From: Stefan Wahren Date: Thu, 31 Aug 2017 20:24:36 +0000 (+0200) Subject: ARM: cpuidle: Avoid memleak if init fail X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=ed40fad9a568efe83f5e80897ded71117b6911b3;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git ARM: cpuidle: Avoid memleak if init fail In case there are no DT idle states defined or cpuidle_register_driver() fails, the copy of the idle driver is leaked: unreferenced object 0xede0dc00 (size 1024): comm "swapper/0", pid 1, jiffies 4294937431 (age 744.510s) hex dump (first 32 bytes): 94 9e 0b c1 00 00 00 00 00 00 00 00 00 00 00 00 ................ 57 46 49 00 00 00 00 00 00 00 00 00 00 00 00 00 WFI............. backtrace: [] arm_idle_init+0x44/0x1ac [] do_one_initcall+0x3c/0x16c [] kernel_init_freeable+0x110/0x1d0 [] kernel_init+0x8/0x114 [] ret_from_fork+0x14/0x3c So fix this by freeing the unregistered copy in error case. Signed-off-by: Stefan Wahren Fixes: d50a7d8acd78 (ARM: cpuidle: Support asymmetric idle definition) Signed-off-by: Rafael J. Wysocki --- diff --git a/drivers/cpuidle/cpuidle-arm.c b/drivers/cpuidle/cpuidle-arm.c index 7080c384ad5d..52a75053ee03 100644 --- a/drivers/cpuidle/cpuidle-arm.c +++ b/drivers/cpuidle/cpuidle-arm.c @@ -104,13 +104,13 @@ static int __init arm_idle_init(void) ret = dt_init_idle_driver(drv, arm_idle_state_match, 1); if (ret <= 0) { ret = ret ? : -ENODEV; - goto out_fail; + goto init_fail; } ret = cpuidle_register_driver(drv); if (ret) { pr_err("Failed to register cpuidle driver\n"); - goto out_fail; + goto init_fail; } /* @@ -149,6 +149,8 @@ static int __init arm_idle_init(void) } return 0; +init_fail: + kfree(drv); out_fail: while (--cpu >= 0) { dev = per_cpu(cpuidle_devices, cpu);