Still trying to develop some kind of test to reliably trigger this. > My guess is that that may be collateral damage from the double > unhashing of the stateid. It certainly doesn't look directly related to > anything in knfsd -- it's a crash down deep in the POSIX ACL code, > apparently. Thinking that it's collateral - here's the backtrace from a similar event. (was preceded by both the WARN_ON_ONCE() and the list_del corruption messages) running 3.18.9: [846121.007040] general protection fault: 0000 [#1] SMP [846121.013461] Modules linked in: nfnetlink_queue nfnetlink_log nfnetlink bluetooth gfs2 dlm sctp sg dm_service_time cts iscsi_tcp libiscsi_tcp libiscsi rpcsec_gss_ krb5 nfsv4 dns_resolver nfs scsi_transport_iscsi fscache 8021q nf_log_ipv4 nf_log_common garp xt_LOG mrp stp llc bonding xt_conntrack cfg80211 iptable_filter nf_conn track_ftp nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack rfkill ip_tables dm_multipath x86_pkg_temp_thermal coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul crc32 c_intel ghash_clmulni_intel mei_me mei aesni_intel lrw gf128mul glue_helper nfsd ablk_helper sb_edac iTCO_wdt ipmi_devintf pcspkr acpi_power_meter iTCO_vendor_suppor t dcdbas ipmi_si edac_core cryptd lpc_ich mfd_core wmi shpchp ipmi_msghandler acpi_pad auth_rpcgss nfs_acl lockd grace sunrpc binfmt_misc xfs sr_mod cdrom mgag200 sy scopyarea sd_mod sysfillrect sysimgblt i2c_algo_bit ixgbe drm_kms_helper mdio tg3 ttm ahci dca drm libahci ptp libata megaraid_sas i2c_core pps_core dm_mirror dm_region_hash dm_log dm_mod [846121.119250] CPU: 8 PID: 46216 Comm: nfsd Tainted: G W 3.18.9 #1 [846121.127982] Hardware name: Dell Inc. PowerEdge R720/0X3D66, BIOS 2.4.3 07/09/2014 [846121.137268] task: ffff881ecd854330 ti: ffff881ecebf4000 task.ti: ffff881ecebf4000 [846121.146540] RIP: 0010:[<ffffffff811c7595>] [<ffffffff811c7595>] kmem_cache_alloc+0x65/0x140 [846121.156839] RSP: 0018:ffff881ecebf7c28 EFLAGS: 00010286 [846121.163626] RAX: 0000000000000000 RBX: ffff8811bd0cf3e0 RCX: 0000000000003a0c [846121.172438] RDX: 0000000000003a0b RSI: 00000000000080d0 RDI: ffff881fff489000 [846121.181267] RBP: ffff881ecebf7c68 R08: 0000000000016ae0 R09: 00000000b9acddf8 [846121.190049] R10: ffff883fe43df000 R11: ffff881856038437 R12: ff88185603834800 [846121.198826] R13: 00000000000080d0 R14: ffff881fff489000 R15: ffffffffa0517b79 [846121.207623] FS: 0000000000000000(0000) GS:ffff881fffa80000(0000) knlGS:0000000000000000 [846121.217475] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [846121.224720] CR2: 00000000006e8360 CR3: 00000000019bc000 CR4: 00000000001407e0 [846121.233525] Stack: [846121.236601] 0000000000000014 ffff881fff403c00 ffff881ecebf7c88 ffff8811bd0cf3e0 [846121.245723] ffff883fe43df000 ffff8835d38afa80 0000000000000000 ffff881fff489000 [846121.254854] ffff881ecebf7ca8 ffffffffa0517b79 0000000000000000 ffff8811bd0cf3e0 [846121.263984] Call Trace: [846121.267559] [<ffffffffa0517b79>] nfs4_alloc_stid+0x29/0xc0 [nfsd] [846121.275355] [<ffffffffa051fcf8>] nfsd4_lock+0x6f8/0xda0 [nfsd] [846121.282870] [<ffffffffa050cf07>] nfsd4_proc_compound+0x4d7/0x7f0 [nfsd] [846121.291191] [<ffffffffa04f8e43>] nfsd_dispatch+0xc3/0x210 [nfsd] [846121.298869] [<ffffffffa01c8e02>] ? svc_tcp_adjust_wspace+0x12/0x30 [sunrpc] [846121.307590] [<ffffffffa01c7d23>] svc_process_common+0x453/0x6f0 [sunrpc] [846121.316018] [<ffffffffa01c80c7>] svc_process+0x107/0x170 [sunrpc] [846121.323764] [<ffffffffa04f87c7>] nfsd+0xf7/0x160 [nfsd] [846121.330541] [<ffffffffa04f86d0>] ? nfsd_destroy+0x80/0x80 [nfsd] [846121.338226] [<ffffffff81093861>] kthread+0xe1/0x100 [846121.344624] [<ffffffff81093780>] ? kthread_create_on_node+0x1b0/0x1b0 [846121.352776] [<ffffffff816912fc>] ret_from_fork+0x7c/0xb0 [846121.359661] [<ffffffff81093780>] ? kthread_create_on_node+0x1b0/0x1b0 [846121.367961] Code: cc 00 00 49 8b 50 08 4d 8b 20 49 8b 40 10 4d 85 e4 0f 84 a7 00 00 00 48 85 c0 0f 84 9e 00 00 00 49 63 46 20 48 8d 4a 01 4d 8b 06 <49> 8b 1c 04 4c 89 e0 65 49 0f c7 08 0f 94 c0 84 c0 74 b9 49 63 [846121.391248] RIP [<ffffffff811c7595>] kmem_cache_alloc+0x65/0x140 [846121.398936] RSP <ffff881ecebf7c28> -- Andrew W. Elble aweits@xxxxxxxxxxxxxxxxxx Infrastructure Engineer, Communications Technical Lead Rochester Institute of Technology PGP: BFAD 8461 4CCF DC95 DA2C B0EB 965B 082E 863E C912 -- To unsubscribe from this list: send the line "unsubscribe linux-nfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
