Date:   Mon, 4 Oct 2021 10:50:45 -0700
From:   Eric Dumazet <edumazet@...gle.com>
To:     Naresh Kamboju <naresh.kamboju@...aro.org>
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        open list <linux-kernel@...r.kernel.org>,
        Shuah Khan <shuah@...nel.org>,
        Florian Fainelli <f.fainelli@...il.com>, patches@...nelci.org,
        lkft-triage@...ts.linaro.org, Jon Hunter <jonathanh@...dia.com>,
        linux-stable <stable@...r.kernel.org>,
        Pavel Machek <pavel@...x.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        Guenter Roeck <linux@...ck-us.net>,
        Netdev <netdev@...r.kernel.org>
Subject: Re: [PATCH 4.14 00/75] 4.14.249-rc1 review

On Mon, Oct 4, 2021 at 10:49 AM Naresh Kamboju
<naresh.kamboju@...aro.org> wrote:
>
> On Mon, 4 Oct 2021 at 18:29, Greg Kroah-Hartman
> <gregkh@...uxfoundation.org> wrote:
> >
> > This is the start of the stable review cycle for the 4.14.249 release.
> > There are 75 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, 06 Oct 2021 12:50:17 +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-4.14.249-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-4.14.y
> > and the diffstat can be found below.
> >
> > thanks,
> >
> > greg k-h
>
> Regression found on arm, arm64, i386 and x86.
> following kernel crash reported on stable-rc linux-4.14.y.
>
> The regression found to be the same as linux-4.19.y regression report.
>

Same comment really.

Please backport f06bc03339ad4c1baa964a5f0606247ac1c3c50b
("cred: allow get_cred() and put_cred() to be given NULL.")


> metadata:
>   git branch: linux-4.14.y
>   git repo: https://gitlab.com/Linaro/lkft/mirrors/stable/linux-stable-rc
>   git commit: 7f6d4fdae68d03504a8db861c9b0b7d141fc8e1b
>   git describe: v4.14.248-76-g7f6d4fdae68d
>   make_kernelversion: 4.14.249-rc1
>   kernel-config: https://builds.tuxbuild.com/1z2iunDwXCLi5DKUEpJHnhM0ySR/config
>
> Kernel crash:
> --------------
> [   14.317412] BUG: unable to handle kernel NULL pointer dereference
> at           (null)
> [   14.325232] IP: __sk_destruct+0xb9/0x190
> [   14.329155] PGD 0 P4D 0
> [   14.331687] Oops: 0002 [#1] SMP PTI
> [   14.335171] Modules linked in:
> [   14.338222] CPU: 2 PID: 0 Comm: swapper/2 Not tainted 4.14.249-rc1 #1
> [   14.344652] Hardware name: Supermicro SYS-5019S-ML/X11SSH-F, BIOS
> 2.0b 07/27/2017
> [   14.352122] task: ffff8dc95d6dac40 task.stack: ffffaa1401930000
> [   14.358052] RIP: 0010:__sk_destruct+0xb9/0x190
> [   14.362514] RSP: 0000:ffff8dc96fd03dc8 EFLAGS: 00010246
> [   14.367730] RAX: 0000000000000000 RBX: ffff8dc95ba682c0 RCX: 0000000000000002
> [   14.374856] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
> [   14.381978] RBP: ffff8dc96fd03de8 R08: ffff8dc95ba68000 R09: 0000000000000000
> [   14.389103] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8dc95ba68000
> [   14.396226] R13: ffff8dc95ba682c0 R14: ffff8dc95c33b540 R15: 00000000ffffff0c
> [   14.403351] FS:  0000000000000000(0000) GS:ffff8dc96fd00000(0000)
> knlGS:0000000000000000
> [   14.411428] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> [   14.417164] CR2: 0000000000000000 CR3: 0000000310c0a001 CR4: 00000000003606e0
> [   14.424291] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> [   14.431414] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
> [   14.438538] Call Trace:
> [   14.440982]  <IRQ>
> [   14.442994]  __sk_free+0x5d/0x100
> [   14.446311]  __sock_wfree+0x2c/0x30
> [   14.449796]  skb_release_head_state+0x52/0xa0
> [   14.454146]  napi_consume_skb+0x5a/0x140
> [   14.458081]  igb_poll+0xc7/0xf40
> [   14.461305]  net_rx_action+0x12c/0x3c0
> [   14.465049]  ? __napi_schedule+0x54/0x70
> [   14.468993]  __do_softirq+0xf6/0x316
> [   14.472565]  irq_exit+0xab/0xe0
> [   14.475710]  do_IRQ+0x90/0xe0
> [   14.478673]  common_interrupt+0x97/0x97
> [   14.482503]  </IRQ>
> [   14.484601] RIP: 0010:cpuidle_enter_state+0x10b/0x270
> [   14.489644] RSP: 0000:ffffaa1401933e90 EFLAGS: 00000246 ORIG_RAX:
> ffffffffffffffbd
> [   14.497200] RAX: ffff8dc96fd1fb00 RBX: ffff8dc95ce2b400 RCX: 000000000000001f
> [   14.504326] RDX: 20c49ba5e353f7cf RSI: ffffffeef3e739ed RDI: 0000000000000000
> [   14.511448] RBP: ffffaa1401933ec8 R08: 0000000355625095 R09: 0000000000000002
> [   14.518574] R10: 0000000000000032 R11: ffff8dc95ce2b400 R12: 0000000000000001
> [   14.525697] R13: ffffffff8accb7c0 R14: ffffffff8accb820 R15: 0000000355625095
> [   14.532824]  cpuidle_enter+0x17/0x20
> [   14.536401]  call_cpuidle+0x23/0x40
> [   14.539886]  do_idle+0x15c/0x1b0
> [   14.543109]  cpu_startup_entry+0x20/0x30
> [   14.547052]  start_secondary+0x179/0x1b0
> [   14.550995]  secondary_startup_64+0xa5/0xb0
> [   14.555174] Code: 23 48 8b 47 20 48 8d 50 ff a8 01 48 0f 45 fa f0
> ff 4f 1c 0f 84 d3 00 00 00 48 c7 83 08 ff ff ff 00 00 00 00 48 8b bb
> 78 ff ff ff <f0> ff 0f 0f 84 9a 00 00 00 48 8b bb 70 ff ff ff e8 52 29
> 77 ff
> [   14.574049] RIP: __sk_destruct+0xb9/0x190 RSP: ffff8dc96fd03dc8
> [   14.579984] CR2: 0000000000000000
> [   14.583297] ---[ end trace 60cf825c79b13148 ]---
> [   14.587914] Kernel panic - not syncing: Fatal exception in interrupt
> [   14.594301] Kernel Offset: 0x8400000 from 0xffffffff81000000
> (relocation range: 0xffffffff80000000-0xffffffffbfffffff)
> [   14.604987] ---[ end Kernel panic - not syncing: Fatal exception in interrupt
>
> Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>
>
> ref:
> https://lkft.validation.linaro.org/scheduler/job/3657328#L932
>
> --
> Linaro LKFT
> https://lkft.linaro.org

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