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c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=B0b9UMK24v6NX2X8zYI+BkJ3zJnFD1PM99BHGur3P6E=; b=c5IETbTt9lanVYbc4ZQ30wIXplRE/9z6EuTP17waAUfU+VjkoWSg4jqOrUHEy0/o8w ZONaPdMC+Ly2vWVdTHZw2JQZCVT4UwfZDdTBur/wHeuTBFG3YsMpNFeqHnGxDefc2tmd 2WGZm5UaDMqvX3dJ5i2OF68MpLKY1iwRwZnNQpAj8Q+mclCEmSjskeYeYzTw+5u6em35 5egZgbVs1SyZiE1jeLMo19g+N3LNjRBbv10xEarVuhVgjholJmH/b2JFP1K5xoCa8SBc rz5NVMqL3gYs95s8k8iVD6UpQIsI2QlP3AIm/T+a62oxgcShYb3qzssJ5wNXSCVyk9nC fF6Q== X-Gm-Message-State: AOAM530ZSm7CXoKSUdvTYuJZ0zJNy0f1HWTkquU8a3UblR64Rf44u/gb iVtgy57yR89XU89zbpZxI+kgyOQel75U01zf/HhS0Q== X-Google-Smtp-Source: ABdhPJw9Kem7X/V6X+O7xfXZA3c3hpHwIItrswtiz2UQ+rk3CTaZObtbDgJMp5+mMd1VPa3PZcIbNSoqLrCV/vM3weM= X-Received: by 2002:ab0:5963:: with SMTP id o32mr19079185uad.142.1595925252099; Tue, 28 Jul 2020 01:34:12 -0700 (PDT) MIME-Version: 1.0 References: <20200727134914.312934924@linuxfoundation.org> In-Reply-To: <20200727134914.312934924@linuxfoundation.org> From: Naresh Kamboju Date: Tue, 28 Jul 2020 14:04:00 +0530 Message-ID: Subject: Re: [PATCH 4.19 00/86] 4.19.135-rc1 review To: Greg Kroah-Hartman , songmuchun@bytedance.com Cc: open list , Linus Torvalds , Andrew Morton , Guenter Roeck , Shuah Khan , patches@kernelci.org, Ben Hutchings , linux- stable , Hugh Dickins , Christoph Lameter , Roman Gushchin , iamjoonsoo.kim@lge.com, linux-mm , mm-commits@vger.kernel.org, penberg@kernel.org, rientjes@google.com, Shakeel Butt , Vlastimil Babka , Arnd Bergmann , lkft-triage@lists.linaro.org, clang-built-linux@googlegroups.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 7EB1F16A06B X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 27 Jul 2020 at 19:40, Greg Kroah-Hartman wrote: > > This is the start of the stable review cycle for the 4.19.135 release. > There are 86 patches in this series, all will be posted as a response > to this one. If anyone has any issues with these being applied, please > let me know. > > Responses should be made by Wed, 29 Jul 2020 13:48:51 +0000. > Anything received after that time might be too late. > > The whole patch series can be found in one patch at: > https://www.kernel.org/pub/linux/kernel/v4.x/stable-review/patch-= 4.19.135-rc1.gz > or in the git tree and branch at: > git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable= -rc.git linux-4.19.y > and the diffstat can be found below. > > thanks, > > greg k-h > > ------------- > Pseudo-Shortlog of commits: Results from Linaro=E2=80=99s test farm. Regressions detected on x86_64. Boot failures on x86_64 devices running 4.19.135-rc1 kernel. Summary ------------------------------------------------------------------------ kernel: 4.19.135-rc1 git repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stab= le-rc.git git branch: linux-4.19.y git commit: e11702667f84474535b156dbb194deffa0a6cdb4 git describe: v4.19.134-87-ge11702667f84 Test details: https://qa-reports.linaro.org/lkft/linux-stable-rc-4.19-oe/bu= ild/v4.19.134-87-ge11702667f84 > Muchun Song > mm: memcg/slab: fix memory leak at non-root kmem_cache destroy [ 2.510884] =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D [ 2.510884] WARNING: possible recursive locking detected [ 2.510884] 4.19.135-rc1 #1 Not tainted [ 2.510884] -------------------------------------------- [ 2.510884] swapper/0/1 is trying to acquire lock: [ 2.510884] 0000000088703397 (slab_mutex){+.+.}, at: kmem_cache_destroy+0x9a/0x2b0 [ 2.510884] [ 2.510884] but task is already holding lock: [ 2.510884] 0000000088703397 (slab_mutex){+.+.}, at: kmem_cache_destroy+0x45/0x2b0 [ 2.510884] [ 2.510884] other info that might help us debug this: [ 2.510884] Possible unsafe locking scenario: [ 2.510884] [ 2.510884] CPU0 [ 2.510884] ---- [ 2.510884] lock(slab_mutex); [ 2.510884] lock(slab_mutex); [ 2.510884] [ 2.510884] *** DEADLOCK *** [ 2.510884] [ 2.510884] May be due to missing lock nesting notation [ 2.510884] [ 2.510884] 3 locks held by swapper/0/1: [ 2.510884] #0: 000000008702dddc (cpu_hotplug_lock.rw_sem){++++}, at: kmem_cache_destroy+0x32/0x2b0 [ 2.510884] #1: 0000000050103e4d (mem_hotplug_lock.rw_sem){++++}, at: kmem_cache_destroy+0x37/0x2b0 [ 2.510884] #2: 0000000088703397 (slab_mutex){+.+.}, at: kmem_cache_destroy+0x45/0x2b0 [ 2.510884] [ 2.510884] stack backtrace: [ 2.510884] CPU: 2 PID: 1 Comm: swapper/0 Not tainted 4.19.135-rc1 #1 [ 2.510884] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS 2.0b 07/27/2017 [ 2.510884] Call Trace: [ 2.510884] dump_stack+0x7a/0xa5 [ 2.510884] __lock_acquire+0x6f1/0x1380 [ 2.510884] ? ret_from_fork+0x3a/0x50 [ 2.510884] lock_acquire+0x95/0x190 [ 2.510884] ? lock_acquire+0x95/0x190 [ 2.510884] ? kmem_cache_destroy+0x9a/0x2b0 [ 2.510884] ? kmem_cache_destroy+0x9a/0x2b0 [ 2.510884] __mutex_lock+0x83/0x990 [ 2.510884] ? kmem_cache_destroy+0x9a/0x2b0 [ 2.510884] ? kmem_cache_destroy+0x60/0x2b0 [ 2.510884] ? set_debug_rodata+0x17/0x17 [ 2.510884] ? set_debug_rodata+0x17/0x17 [ 2.510884] mutex_lock_nested+0x1b/0x20 [ 2.510884] ? get_online_mems+0x5f/0x90 [ 2.510884] ? mutex_lock_nested+0x1b/0x20 [ 2.510884] kmem_cache_destroy+0x9a/0x2b0 [ 2.510884] ? set_debug_rodata+0x17/0x17 [ 2.510884] intel_iommu_init+0x11c6/0x1326 [ 2.510884] ? kfree+0xc4/0x240 [ 2.510884] ? lockdep_hardirqs_on+0xef/0x180 [ 2.510884] ? kfree+0xc4/0x240 [ 2.510884] ? trace_hardirqs_on+0x4c/0x100 [ 2.510884] ? unpack_to_rootfs+0x272/0x29a [ 2.510884] ? e820__memblock_setup+0x64/0x64 [ 2.510884] ? set_debug_rodata+0x17/0x17 [ 2.510884] pci_iommu_init+0x1a/0x44 [ 2.510884] ? e820__memblock_setup+0x64/0x64 [ 2.510884] ? pci_iommu_init+0x1a/0x44 [ 2.510884] do_one_initcall+0x61/0x2b4 [ 2.510884] ? set_debug_rodata+0xa/0x17 [ 2.510884] ? rcu_read_lock_sched_held+0x81/0x90 [ 2.510884] kernel_init_freeable+0x1d8/0x270 [ 2.510884] ? rest_init+0x190/0x190 [ 2.510884] kernel_init+0xe/0x110 [ 2.510884] ret_from_fork+0x3a/0x50 Full test log: https://pastebin.com/PWkk0YaF --=20 Linaro LKFT https://lkft.linaro.org