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Date: Thu, 28 Jul 2016 13:59:29 +0300 From: "Alex Lyakas" <alex@...arastorage.com> To: <netdev@...r.kernel.org> Subject: skb_release_data causes "BUG: Bad page state" Greetings, We had this warning[1] on long-term mainline kernel 3.18.19. Can anybody please advise on what might be causing it. Thanks, Alex. [1] Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.538709] BUG: Bad page state in process kworker/0:1H pfn:4b317 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.539555] page:ffffea00012cc5c0 count:0 mapcount:-1 mapping: (null) index:0x0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.540541] flags: 0x1ffff0000008000(tail) Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541087] page dumped because: nonzero mapcount Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541664] Modules linked in: dm_crypt(OE) xfrm_user(E) xfrm4_tunnel(E) tunnel4(E) ipcomp(E) xfrm_ipcomp(E) esp4(E) ah4(E) xt_multiport(E) dm_queue_length(E) sd_mod(E) bonding(E) ib_iser(OE) rdma_cm(OE) iw_cm(OE) ib_cm(OE) ib_sa(OE) ib_mad(OE) ib_core(OE) ib_addr(OE) compat(OE) iscsi_tcp(OE) libiscsi_tcp(OE) libiscsi(OE) scsi_transport_iscsi(OE) ipt_MASQUERADE(E) nf_nat_masquerade_ipv4(E) iptable_nat(E) nf_nat_ipv4(E) nf_nat(E) nf_conntrack_ipv4(E) nf_defrag_ipv4(E) xt_conntrack(E) nf_conntrack(E) ipt_REJECT(E) nf_reject_ipv4(E) xt_CHECKSUM(E) iptable_mangle(E) xt_tcpudp(E) dm_zcache(OE) bridge(E) stp(E) llc(E) xfs(OE) btrfs(OE) ip6table_filter(E) ip6_tables(E) raid456(OE) iptable_filter(E) async_raid6_recov(E) async_memcpy(E) async_pq(E) async_xor(E) ip_tables(E) x_tables(E) xor(E) async_tx(E) raid6_pq(E) raid1(OE) md_mod(OE) deflate(E) ctr(E) twofish_generic(E) twofish_x86_64_3way(E) twofish_x86_64(E) twofish_common(E) camellia_generic(E) camellia_x86_64(E) serpent_sse2_x86_64(E) xts(E) serpent_generic(E) lrw(E) gf128mul(E) glue_helper(E) blowfish_generic(E) blowfish_x86_64(E) blowfish_common(E) cast5_generic(E) cast_common(E) ablk_helper(E) cryptd(E) des3_ede_x86_64(E) des_generic(E) cmac(E) xcbc(E) rmd160(E) crypto_null(E) af_key(E) xfrm_algo(E) iscsi_scst(OE) scst_utgt(OE) scst_vdisk(OE) libcrc32c(E) scst(OE) ppdev(E) nls_iso8859_1(E) dm_multipath(OE) kvm(E) scsi_dh(E) serio_raw(E) ttm(E) drm_kms_helper(E) drm(E) nfsd(OE) syscopyarea(E) auth_rpcgss(E) nfs_acl(E) sysfillrect(E) 8250_fintek(E) sysimgblt(E) nfs(E) parport_pc(E) lockd(E) grace(E) i2c_piix4(E) sunrpc(E) fscache(E) i6300esb(E) mac_hid(E) lp(E) parport(E) ata_generic(E) pata_acpi(E) ata_piix(E) psmouse(E) floppy(E) libata(E) scsi_mod(OE) ixgbevf(OE) Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541736] CPU: 0 PID: 3885 Comm: kworker/0:1H Tainted: G OE 3.18.19-zadara05 #1 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541738] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541743] Workqueue: kblockd blk_delay_work Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541744] ffffffff81a79568 ffff88008fa03c88 ffffffff81710c85 0000000000001fcc Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541747] ffffea00012cc5c0 ffff88008fa03cb8 ffffffff8170d7d7 ff0000ffffffffff Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541749] ffffea00012cc5c0 0000000000000000 00ffff0000000000 ffff88008fa03d08 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541751] Call Trace: Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541753] <IRQ> [<ffffffff81710c85>] dump_stack+0x4e/0x71 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541759] [<ffffffff8170d7d7>] bad_page.part.50+0xe0/0xfe Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541764] [<ffffffff81176989>] free_pages_prepare+0x199/0x1b0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541766] [<ffffffff81178b0b>] __free_pages_ok+0x1b/0xd0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541768] [<ffffffff81178bdb>] free_compound_page+0x1b/0x20 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541770] [<ffffffff8170dca7>] __put_compound_page+0x19/0x1d Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541773] [<ffffffff8117fdcf>] put_compound_page+0x1bf/0x1e0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541776] [<ffffffff8117fe3b>] put_page+0x4b/0x50 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541779] [<ffffffff81718fed>] ? reschedule_interrupt+0x6d/0x80 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541782] [<ffffffff815fcae7>] skb_release_data+0x87/0xd0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541784] [<ffffffff815fcb58>] skb_release_all+0x28/0x30 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541786] [<ffffffff815fcf8c>] consume_skb+0x2c/0xa0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541789] [<ffffffff8160cfc5>] __dev_kfree_skb_any+0x35/0x40 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541797] [<ffffffffc039a3c1>] ixgbevf_poll+0xd1/0x550 [ixgbevf] Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541799] [<ffffffff8160e3c2>] net_rx_action+0x152/0x280 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541803] [<ffffffff81077025>] __do_softirq+0xf5/0x320 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541805] [<ffffffff81077575>] irq_exit+0x115/0x120 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541809] [<ffffffff81048895>] smp_call_function_single_interrupt+0x35/0x40 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541811] [<ffffffff81718ded>] call_function_single_interrupt+0x6d/0x80 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541812] <EOI> [<ffffffffc03d0047>] ? scsi_host_free_command.isra.10+0x47/0x50 [scsi_mod] Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541824] [<ffffffff817173e6>] ? _raw_spin_unlock_irq+0x16/0x50 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541826] [<ffffffff81362fa5>] blk_delay_work+0x35/0x40 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541831] [<ffffffff8108bd56>] process_one_work+0x146/0x410 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541833] [<ffffffff8108c141>] worker_thread+0x121/0x450 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541836] [<ffffffff8108c020>] ? process_one_work+0x410/0x410 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541838] [<ffffffff810911b9>] kthread+0xc9/0xe0 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541840] [<ffffffff810910f0>] ? kthread_create_on_node+0x180/0x180 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541843] [<ffffffff81717918>] ret_from_fork+0x58/0x90 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541845] [<ffffffff810910f0>] ? kthread_create_on_node+0x180/0x180 Jul 21 22:57:27 vsa-000001cc-vc-1 kernel: [96804.541846] Disabling lock debugging due to kernel taint
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