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Date: Sun, 21 Mar 2021 08:05:52 +0100
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: "J. Bruce Fields" <bfields@...hat.com>,
linux-kernel@...r.kernel.org
Subject: Re: Linux 5.10.25
On Sat, Mar 20, 2021 at 09:31:55PM +0000, Jamie Heilman wrote:
> [ugh, resent with the lkml headers unbroken, sorry about the dupe]
>
> Greg Kroah-Hartman wrote:
> > J. Bruce Fields (2):
> > Revert "nfsd4: remove check_conflicting_opens warning"
> > Revert "nfsd4: a client's own opens needn't prevent delegations"
>
> Hrm, just got this when I udpated my nfs server (32bit Via EPIA system)
> from 5.10.20 to 5.10.25:
>
> [ 49.225914] NFSD: Using UMH upcall client tracking operations.
> [ 49.231919] NFSD: starting 90-second grace period (net f0000036)
> [ 50.036973] ------------[ cut here ]------------
> [ 50.041771] WARNING: CPU: 0 PID: 2284 at fs/nfsd/nfs4state.c:4968 nfsd4_process_open2+0xf9c/0x1170 [nfsd]
> [ 50.051434] Modules linked in: md5 cpufreq_conservative cpufreq_userspace cpufreq_powersave cpufreq_ondemand autofs4 quota_v2 quota_tree nfsd auth_rpcgss nfs lockd grace nfs_ssc fscache sunrpc xt_mark cls_fw sch_htb iptable_nat xt_nat nf_nat ipt_REJECT nf_reject_ipv4 xt_tcpudp xt_multiport iptable_mangle xt_state xt_conntrack nf_conntrack nf_defrag_ipv4 nf_log_ipv4 nf_log_common xt_LOG xt_limit iptable_filter ip_tables x_tables nhpoly1305 chacha_generic libchacha adiantum libpoly1305 dm_crypt dm_mod snd_hda_codec_via snd_hda_codec_generic snd_hda_intel snd_intel_dspcfg snd_hda_codec snd_hwdep snd_hda_core snd_pcm snd_timer snd via_rhine psmouse soundcore mii via_agp sg via_velocity evdev agpgart
> [ 50.113386] CPU: 0 PID: 2284 Comm: nfsd Tainted: G T 5.10.25 #1
> [ 50.120669] Hardware name: To Be Filled By O.E.M. To Be Filled By O.E.M./To be filled by O.E.M., BIOS 080014 06/01/2009
> [ 50.131652] EIP: nfsd4_process_open2+0xf9c/0x1170 [nfsd]
> [ 50.137036] Code: 04 88 45 a4 88 07 8b 45 a0 8d 78 49 8b 45 84 8d 70 01 e9 2b f8 ff ff c7 45 9c 00 00 00 00 31 ff bb 00 00 27 67 e9 04 f6 ff ff <0f> 0b e9 a0 f5 ff ff 0f b6 d4 0f a3 15 94 3f 23 f8 0f 83 b1 fd ff
> [ 50.155866] EAX: 00000000 EBX: 82da25b0 ECX: 830c0920 EDX: 00000000
> [ 50.162187] ESI: 82da25b0 EDI: 82da55a0 EBP: 8310be68 ESP: 8310bddc
> [ 50.168507] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 EFLAGS: 00010246
> [ 50.175338] CR0: 80050033 CR2: 00551e50 CR3: 03222000 CR4: 000006b0
> [ 50.181654] Call Trace:
> [ 50.184165] ? inode_permission+0x17/0xc0
> [ 50.188289] nfsd4_open+0x429/0x910 [nfsd]
> [ 50.192483] ? nfsd4_encode_operation+0x185/0x1e0 [nfsd]
> [ 50.197900] ? nfsd4_rename+0x1a0/0x1a0 [nfsd]
> [ 50.202439] nfsd4_proc_compound+0x457/0x6c0 [nfsd]
> [ 50.207419] nfsd_dispatch+0xdc/0x1a0 [nfsd]
> [ 50.211816] svc_process_common+0x38a/0x650 [sunrpc]
> [ 50.216880] ? svc_xprt_do_enqueue+0xd7/0xe0 [sunrpc]
> [ 50.222017] ? svc_xprt_received+0x5d/0xf0 [sunrpc]
> [ 50.227000] ? nfsd_svc+0x300/0x300 [nfsd]
> [ 50.231190] svc_process+0xa9/0xf0 [sunrpc]
> [ 50.235468] nfsd+0xcd/0x120 [nfsd]
> [ 50.239025] kthread+0xe1/0x100
> [ 50.242259] ? nfsd_destroy+0x50/0x50 [nfsd]
> [ 50.246588] ? kthread_create_on_node+0x30/0x30
> [ 50.251165] ret_from_fork+0x1c/0x28
> [ 50.254789] ---[ end trace 171bde4774bc9795 ]---
>
> Can't readily reproduce it though, so likely a race condition or
> something that requires more state buildup than I have after a few
> minutes of uptime. Kernel config at
> http://audible.transient.net/~jamie/k/nfsd.config-5.10.25 in case you
> think this worth more investigation.
Do you also have this issue in Linus's tree and the latest 5.11.y
release?
thanks,
greg k-h
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