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Message-ID: <1532956125.2679.28.camel@arista.com>
Date: Mon, 30 Jul 2018 14:08:45 +0100
From: Dmitry Safonov <dima@...sta.com>
To: kernel test robot <lkp@...el.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
LKP <lkp@...org>, David Miller <davem@...emloft.net>
Subject: Re: [LKP] 7acf9d4237 BUG: kernel hang in test stage
Thanks for the report, looking into this..
On Mon, 2018-07-30 at 16:12 +0800, kernel test robot wrote:
> Greetings,
>
> 0day kernel testing robot got the below dmesg and the first bad
> commit is
>
> https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git master
>
> commit 7acf9d4237c46894e0fa0492dd96314a41742e84
> Author: Dmitry Safonov <dima@...sta.com>
> AuthorDate: Fri Jul 27 16:54:44 2018 +0100
> Commit: David S. Miller <davem@...emloft.net>
> CommitDate: Sun Jul 29 12:50:19 2018 -0700
>
> netlink: Do not subscribe to non-existent groups
>
> Make ABI more strict about subscribing to group > ngroups.
> Code doesn't check for that and it looks bogus.
> (one can subscribe to non-existing group)
> Still, it's possible to bind() to all possible groups with (-1)
>
> Cc: "David S. Miller" <davem@...emloft.net>
> Cc: Herbert Xu <herbert@...dor.apana.org.au>
> Cc: Steffen Klassert <steffen.klassert@...unet.com>
> Cc: netdev@...r.kernel.org
> Signed-off-by: Dmitry Safonov <dima@...sta.com>
> Signed-off-by: David S. Miller <davem@...emloft.net>
>
> 9939a46d90 NET: stmmac: align DMA stuff to largest cache line length
> 7acf9d4237 netlink: Do not subscribe to non-existent groups
> 25432eba9c openvswitch: meter: Fix setting meter id for new entries
> +--------------------------------------------------+------------+--
> ----------+------------+
> > | 9939a46d90 |
> > 7acf9d4237 | 25432eba9c |
>
> +--------------------------------------------------+------------+--
> ----------+------------+
> > boot_successes | 20 |
> > 4 | 4 |
> > boot_failures | 22 |
> > 11 | 11 |
> > INFO:task_blocked_for_more_than#seconds |
> > 22 | | |
> > Kernel_panic-not_syncing:hung_task:blocked_tasks |
> > 22 | | |
> > BUG:kernel_hang_in_test_stage | 0 |
> > 11 | 11 |
>
> +--------------------------------------------------+------------+--
> ----------+------------+
>
> [ 1414.113020] Writes: Total: 373492244 Max/Min: 0/0 Fail: 0
> [ 1472.149785] CE: Reprogramming failure. Giving up
> [ 1475.552294] Writes: Total: 387526813 Max/Min: 0/0 Fail: 0
> [ 1509.501097] CE: Reprogramming failure. Giving up
> [ 1536.992336] Writes: Total: 403788741 Max/Min: 0/0 Fail: 0
> BUG: kernel hang in test stage
>
>
> # HH:MM
> RESULT GOOD BAD GOOD_BUT_DIRTY DIRTY_NOT_BAD
> git bisect start 0a930dcfc77cb12bbf9bffd69fbadcb0c237f577
> d72e90f33aa4709ebecc5005562f52335e106a60 --
> git bisect bad f605359102be537b6217dc49600f4369d1f04932 #
> 07:19 B 0 11 27 0 Merge 'm68k/master' into devel-
> catchup-201807300507
> git bisect bad 375347c493a490f493fafa02f30fa23179acbdb9 #
> 07:53 B 0 11 27 0 Merge 'linux-review/Todd-
> Poynor/staging-gasket-fixes-and-cleanups/20180730-034316' into devel-
> catchup-201807300507
> git bisect good 86b34080126c3f4254a3f9e8d5dcb447d9233bc8 #
> 08:05 G 11 0 6 6 0day base guard for 'devel-catchup-
> 201807300507'
> git bisect bad ed28433e6f289d33dd6b4bbf627a60396234db58 #
> 08:40 B 0 1 17 0 Merge 'net/master' into devel-
> catchup-201807300507
> git bisect good 5b891af7fca14526b2a87c6f38b004e2df655ef4 #
> 08:54 G 11 0 11 11 bpf: Replace [u]int32_t and
> [u]int64_t in libbpf
> git bisect good c259b4fb33ee6e7667bf1d34bf0803b7c5fdbdce #
> 09:03 G 10 0 3 3 netdevsim: don't leak devlink
> resources
> git bisect good b0753408aadf32c7ece9e6b765017881e54af833 #
> 09:17 G 11 0 3 3 net: mdio-mux: bcm-iproc: fix wrong
> getter and setter pair
> git bisect good 71eb5255f55bdb484d35ff7c9a1803f453dfbf82 #
> 09:25 G 11 0 11 11 bpf: use GFP_ATOMIC instead of
> GFP_KERNEL in bpf_parse_prog()
> git bisect good 6d27c6dd1012e7be748ec05da78556319718fbe7 #
> 09:39 G 11 0 4 4 Merge branch 'net-socket-Fix-
> potential-spectre-v1-gadgets'
> git bisect good 9939a46d90c6c76f4533d534dbadfa7b39dc6acc #
> 09:55 G 11 0 7 7 NET: stmmac: align DMA stuff to
> largest cache line length
> git bisect bad 25432eba9cd8f2ef5afef55be811b010a004b5fa #
> 10:28 B 0 11 27 0 openvswitch: meter: Fix setting meter
> id for new entries
> git bisect bad 7acf9d4237c46894e0fa0492dd96314a41742e84 #
> 11:03 B 0 6 22 0 netlink: Do not subscribe to non-
> existent groups
> # first bad commit: [7acf9d4237c46894e0fa0492dd96314a41742e84]
> netlink: Do not subscribe to non-existent groups
> git bisect good 9939a46d90c6c76f4533d534dbadfa7b39dc6acc #
> 11:14 G 31 0 15 22 NET: stmmac: align DMA stuff to
> largest cache line length
> # extra tests with debug options
> git bisect bad 7acf9d4237c46894e0fa0492dd96314a41742e84 #
> 11:48 B 0 11 27 0 netlink: Do not subscribe to non-
> existent groups
> # extra tests on HEAD of linux-devel/devel-catchup-201807300507
> git bisect bad 0a930dcfc77cb12bbf9bffd69fbadcb0c237f577 #
> 11:49 B 0 13 31 0 0day head guard for 'devel-catchup-
> 201807300507'
> # extra tests on tree/branch net/master
> git bisect bad 25432eba9cd8f2ef5afef55be811b010a004b5fa #
> 11:50 B 0 11 27 0 openvswitch: meter: Fix setting meter
> id for new entries
> # extra tests with first bad commit reverted
> git bisect good e61543e57747e8fd80390af39504365a392cef2b #
> 12:04 G 11 0 4 4 Revert "netlink: Do not subscribe to
> non-existent groups"
>
> ---
> 0-DAY kernel test infrastructure Open Source
> Technology Center
> https://lists.01.org/pipermail/lkp Intel
> Corporation
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