Fixed
Created: Oct 26, 2017
Updated: Dec 3, 2018
Resolved Date: Mar 2, 2018
Found In Version: 9.0.0.11
Fix Version: 9.0.0.15
Severity: Standard
Applicable for: Wind River Linux 9
Component/s: Kernel
Environment
======================
BSP/Configuration: ti-am335x + glibc-std-sato
Sometimes there is kmemleak report.
Symptom Details
================
root@ti-am335x:/opt/wr-test# cat /sys/kernel/debug/kmemleak
unreferenced object 0xce2a0b00 (size 64):
comm "swapper", pid 1, jiffies 4294937329 (age 721.620s)
hex dump (first 32 bytes):
73 74 61 74 75 73 00 00 00 00 00 00 00 00 00 00 status..........
00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<c08459f0>] kmemleak_alloc+0x40/0x74
[<c023bd0c>] __kmalloc_track_caller+0x174/0x298
[<c020d248>] kstrdup+0x40/0x5c
[<c06afe70>] safe_name+0x90/0xbc
[<c06b12c8>] __of_add_property_sysfs+0x7c/0xe8
[<c06b13d4>] __of_attach_node_sysfs+0xa0/0xec
[<c0c3ef68>] of_core_init+0x58/0xb0
[<c0c396cc>] driver_init+0x30/0x34
[<c0c00e18>] kernel_init_freeable+0xf8/0x27c
[<c0844eac>] kernel_init+0x18/0x11c
[<c01077b8>] ret_from_fork+0x14/0x3c
[<ffffffff>] 0xffffffff
unreferenced object 0xccaaf680 (size 64):
comm "swapper", pid 1, jiffies 4294937746 (age 717.480s)
hex dump (first 32 bytes):
e0 66 d0 c0 04 1d d9 ce 00 b2 01 ce 00 b2 01 ce .f..............
e0 f4 d7 c0 00 00 00 00 00 00 00 00 00 00 00 00 ................
backtrace:
[<c08459f0>] kmemleak_alloc+0x40/0x74
[<c0238f98>] kmem_cache_alloc_trace+0x138/0x268
[<c0686e90>] ti_cpufreq_probe+0x70/0x318
[<c05c7d00>] platform_drv_probe+0x60/0xac
[<c05c5ef0>] driver_probe_device+0x1e0/0x2a8
[<c05c6160>] __device_attach_driver+0xa4/0xbc ot
@ti-am335x:/opt/wr-test#
1. To Get The Testing Layer:
# git clone git://git.wrs.com/git/projects/wassp-repos/testcases/wrlinux
# cd wrlinux;git checkout WRLINUX_9_0_HEAD
2.Project Build with BTS layer
--machines ti-am335x --dl-layers --distro wrlinux-std-sato --base-url git://pek-git.wrs.com
Build Steps:
. environment-setup-x86_64-wrlinuxsdk-linux
. oe-init-build-env
Add BTS layer
1).bitbake-layers add-layer <path to wr-testing/bts-dev>
2).echo "require templates/feature/bts/template.conf" >> conf/local.conf
3).bitbake wrlinux-image-glibc-std-sato
3. boot target
4. Sometimes kmemleak appeared
Run some cases, like ./main_test.py -s audio_aplay. The kmemleak was met once, when I again run the same one, not see the error.
