From: Waiman Long <longman@redhat.com>
To: Mirsad Todorovac <mirsad.todorovac@alu.hr>, linux-kernel@vger.kernel.org
Cc: Zefan Li <lizefan.x@bytedance.com>, Tejun Heo <tj@kernel.org>,
Johannes Weiner <hannes@cmpxchg.org>,
Shuah Khan <shuah@kernel.org>,
cgroups@vger.kernel.org, linux-kselftest@vger.kernel.org,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
Alexander Viro <viro@zeniv.linux.org.uk>,
Christian Brauner <brauner@kernel.org>, Jan Kara <jack@suse.cz>,
linux-fsdevel@vger.kernel.org
Subject: Re: [BUG] selftests: cgroup: KMEMLEAK in cgroup/test_cpuset_prs.sh
Date: Tue, 27 Feb 2024 17:10:22 -0500 [thread overview]
Message-ID: <d1af171a-49e5-4dcb-987c-c41cf166bac1@redhat.com> (raw)
In-Reply-To: <14915689-27a3-4cd8-80d2-9c30d0c768b6@alu.unizg.hr>
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)
>
>
>
>
prev parent reply other threads:[~2024-02-27 22:10 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-27 19:50 [BUG] selftests: cgroup: KMEMLEAK in cgroup/test_cpuset_prs.sh Mirsad Todorovac
2024-02-27 22:10 ` Waiman Long [this message]
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