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| author | Stefan Wahren <stefan.wahren@i2se.com> | 2017-08-31 22:24:36 +0200 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2017-09-19 23:10:51 +0200 |
| commit | ed40fad9a568efe83f5e80897ded71117b6911b3 (patch) | |
| tree | cce66ea7a82acff442adb3c008e6c5470418a8b3 | |
| parent | 2bd6bf03f4c1c59381d62c61d03f6cc3fe71f66e (diff) | |
| download | linux-ed40fad9a568efe83f5e80897ded71117b6911b3.tar.gz linux-ed40fad9a568efe83f5e80897ded71117b6911b3.tar.bz2 linux-ed40fad9a568efe83f5e80897ded71117b6911b3.zip | |
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:
[<c1295f04>] arm_idle_init+0x44/0x1ac
[<c0301e6c>] do_one_initcall+0x3c/0x16c
[<c1200d70>] kernel_init_freeable+0x110/0x1d0
[<c0cb3624>] kernel_init+0x8/0x114
[<c0307a98>] ret_from_fork+0x14/0x3c
So fix this by freeing the unregistered copy in error case.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
Fixes: d50a7d8acd78 (ARM: cpuidle: Support asymmetric idle definition)
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
| -rw-r--r-- | drivers/cpuidle/cpuidle-arm.c | 6 |
1 files changed, 4 insertions, 2 deletions
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); |