2024-02-27 19:53:18

by Mirsad Todorovac

[permalink] [raw]

Subject: [BUG] selftests: cgroup: KMEMLEAK in cgroup/test_cpuset_prs.sh

---

Hi, everybody,

In the latest vanilla torvalds tree kernel v6.8-rc6-11-g45ec2f5f6ed3 on an Ubuntu 23.10 system, there
KMEMLEAK detected a couple of memory leaks:

Visually it appears like the same leak repeated six times, but I reckoned it might be of importance to
review them all.

It happened on two boxes, and both have AMD Ryzen processors 7 and 9.

Please find attached the build .config

Best regards,
Mirsad Todorovac

# cat /sys/kernel/debug/kmemleak [stack decoded]
unreferenced object 0xffff8d49bd92a720 (size 8):
comm "test_cpuset_prs", pid 9213, jiffies 4294953562
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:643 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff8d49bd92a488 (size 8):
comm "test_cpuset_prs", pid 9213, jiffies 4294953562
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:646 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff8d49bd92a890 (size 8):
comm "test_cpuset_prs", pid 9213, jiffies 4294953562
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:649 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff8d48c12f3720 (size 8):
comm "test_cpuset_prs", pid 28081, jiffies 4295018483
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:643 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff8d48c12f3180 (size 8):
comm "test_cpuset_prs", pid 28081, jiffies 4295018483
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:646 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
unreferenced object 0xffff8d48c12f3188 (size 8):
comm "test_cpuset_prs", pid 28081, jiffies 4295018483
hex dump (first 8 bytes):
00 00 00 00 00 00 00 00 ........
backtrace (crc 0):
kmemleak_alloc (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
__kmalloc_node (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980 /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
alloc_cpumask_var_node (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
cpuset_write_resmask (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:649 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601 /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
cgroup_file_write (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
kernfs_fop_write_iter (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
vfs_write (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497 /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
__x64_sys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
do_syscall_64 (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52 /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
entry_SYSCALL_64_after_hwframe (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)




--
CARNet system engineer
Faculty of Graphic Arts | Academy of Fine Arts
University of Zagreb

CARNet sistem inženjer
Grafički fakultet | Akademija likovnih umjetnosti
Sveučilište u Zagrebu

---

Attachments:

config-6.8.0-rc6-kmlk-00011-g45ec2f5f6ed3.xz (57.73 kB)

2024-02-27 22:10:40

by Waiman Long

[permalink] [raw]

Subject: Re: [BUG] selftests: cgroup: KMEMLEAK in cgroup/test_cpuset_prs.sh

---

On 2/27/24 14:50, Mirsad Todorovac wrote:
> Hi, everybody,
>
> In the latest vanilla torvalds tree kernel v6.8-rc6-11-g45ec2f5f6ed3
> on an Ubuntu 23.10 system, there
> KMEMLEAK detected a couple of memory leaks:
>
> Visually it appears like the same leak repeated six times, but I
> reckoned it might be of importance to
> review them all.
>
> It happened on two boxes, and both have AMD Ryzen processors 7 and 9.
>
> Please find attached the build .config
>
> Best regards,
> Mirsad Todorovac

Yes, you are right. There is a memory leak under certain condition. Will
post a patch to fix it.

Thanks,
Longman

>
> # cat /sys/kernel/debug/kmemleak [stack decoded]
> unreferenced object 0xffff8d49bd92a720 (size 8):
> comm "test_cpuset_prs", pid 9213, jiffies 4294953562
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:643
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
> unreferenced object 0xffff8d49bd92a488 (size 8):
> comm "test_cpuset_prs", pid 9213, jiffies 4294953562
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:646
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
> unreferenced object 0xffff8d49bd92a890 (size 8):
> comm "test_cpuset_prs", pid 9213, jiffies 4294953562
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:649
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
> unreferenced object 0xffff8d48c12f3720 (size 8):
> comm "test_cpuset_prs", pid 28081, jiffies 4295018483
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:643
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
> unreferenced object 0xffff8d48c12f3180 (size 8):
> comm "test_cpuset_prs", pid 28081, jiffies 4295018483
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:646
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
> unreferenced object 0xffff8d48c12f3188 (size 8):
> comm "test_cpuset_prs", pid 28081, jiffies 4295018483
> hex dump (first 8 bytes):
> 00 00 00 00 00 00 00 00                          ........
> backtrace (crc 0):
> kmemleak_alloc
> (/home/marvin/linux/kernel/linux_torvalds/mm/kmemleak.c:1045)
> __kmalloc_node
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/kmemleak.h:42
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3817
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3860
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3980
> /home/marvin/linux/kernel/linux_torvalds/mm/slub.c:3988)
> alloc_cpumask_var_node
> (/home/marvin/linux/kernel/linux_torvalds/lib/cpumask.c:71)
> cpuset_write_resmask
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:649
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:2601
> /home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cpuset.c:3630)
> cgroup_file_write
> (/home/marvin/linux/kernel/linux_torvalds/kernel/cgroup/cgroup.c:4092)
> kernfs_fop_write_iter
> (/home/marvin/linux/kernel/linux_torvalds/fs/kernfs/file.c:334)
> vfs_write
> (/home/marvin/linux/kernel/linux_torvalds/./include/linux/fs.h:2087
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:497
> /home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:590)
> ksys_write (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:643)
> __x64_sys_write
> (/home/marvin/linux/kernel/linux_torvalds/fs/read_write.c:652)
> do_syscall_64
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:52
> /home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/common.c:83)
> entry_SYSCALL_64_after_hwframe
> (/home/marvin/linux/kernel/linux_torvalds/arch/x86/entry/entry_64.S:129)
>
>
>
>