Compreendendo o aviso do dmesg

Question

Alguém poderia dar uma idéia do que esses avisos significam no log dmesg abaixo? Eles significam que o módulo atl1c está falhando ao carregar completamente ou meramente um aviso?

Qualquer informação que ajude a entender melhor o log será apreciada.

Obrigado.

[Wed Apr  4 19:51:54 2018] ------------[ cut here ]------------
[Wed Apr  4 19:51:54 2018] WARNING: at kernel/irq/manage.c:1244 __free_irq+0xa7/0x200()
[Wed Apr  4 19:51:54 2018] Trying to free already-free IRQ 18
[Wed Apr  4 19:51:54 2018] Modules linked in: button ax88179_178a usbnet tg3 r8169 cnic bnx2 vmxnet3 pcnet32 e1000 sfc netxen_nic qlge qlcnic qla3xxx pch_gbe ptp_pch sky2 skge jme ipg uio alx atl1c atl1e atl1 libphy mii exfat(O) btrfs zlib_deflate hfsplus md4 hmac bnx2x(O) libcrc32c mdio mlx5_core(O) mlx4_en(O) mlx4_core(O) mlx_compat(O) compat(O) qede(O) qed(O) atlantic(O) r8168(O) tn40xx(O) i40e(O) ixgbe(O) be2net(O) igb(O) i2c_algo_bit e1000e(O) dca fuse vfat fat glue_helper lrw gf128mul ablk_helper sha512_generic arc4 cryptd ecryptfs sha256_generic sha1_generic ecb aes_x86_64 authenc des_generic ansi_cprng cts md5 cbc cpufreq_conservative cpufreq_powersave cpufreq_performance cpufreq_ondemand acpi_cpufreq mperf processor thermal_sys cpufreq_stats freq_table dm_snapshot
[Wed Apr  4 19:51:54 2018]  crc_itu_t crc_ccitt quota_v2 quota_tree psnap p8022 llc sit tunnel4 ip_tunnel ipv6 zram(C) sg etxhci_hcd mpt3sas mpt2sas(O) megaraid_sas ata_piix mptctl mptsas mptspi mptscsih mptbase scsi_transport_spi megaraid megaraid_mbox megaraid_mm vmw_pvscsi BusLogic usb_storage xhci_hcd uhci_hcd ohci_hcd ehci_pci ehci_hcd usbcore usb_common el000(O)
[Wed Apr  4 19:51:54 2018] CPU: 0 PID: 8840 Comm: ifconfig Tainted: P        WC O 3.10.102 #15266
[Wed Apr  4 19:51:54 2018] Hardware name: System manufacturer System Product Name/M4A78LT-M-LE, BIOS 0704    06/11/2010
[Wed Apr  4 19:51:54 2018]  ffffffff814a9ec3 ffffffff81032ee6 0000000000000000 ffff8800c74b3cf8
[Wed Apr  4 19:51:54 2018]  ffff8800caa4da80 0000000000000012 ffff8800caa4db0c ffffffff81032f47
[Wed Apr  4 19:51:54 2018]  ffffffff816f5e60 ffff880000000020 ffff8800c74b3d08 ffff8800c74b3cc8
[Wed Apr  4 19:51:54 2018] Call Trace:
[Wed Apr  4 19:51:54 2018]  [<ffffffff814a9ec3>] ? dump_stack+0xc/0x15
[Wed Apr  4 19:51:54 2018]  [<ffffffff81032ee6>] ? warn_slowpath_common+0x56/0x70
[Wed Apr  4 19:51:54 2018]  [<ffffffff81032f47>] ? warn_slowpath_fmt+0x47/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aacc25>] ? atl1c_alloc_rx_buffer+0x385/0x410 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffff8109c837>] ? __free_irq+0xa7/0x200
[Wed Apr  4 19:51:54 2018]  [<ffffffff8109ca0f>] ? free_irq+0x2f/0xa0
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aadddc>] ? atl1c_up+0x9c/0x190 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aab396>] ? atl1c_free_irq+0x16/0x40 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aae458>] ? atl1c_open+0x288/0x2e0 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffff813ef92e>] ? __dev_open+0x7e/0xe0
[Wed Apr  4 19:51:54 2018]  [<ffffffff813efb81>] ? __dev_change_flags+0x91/0x140
[Wed Apr  4 19:51:54 2018]  [<ffffffff813efcb2>] ? dev_change_flags+0x12/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffff8144a12c>] ? devinet_ioctl+0x5fc/0x6c0
[Wed Apr  4 19:51:54 2018]  [<ffffffff810296e8>] ? __do_page_fault+0x1b8/0x480
[Wed Apr  4 19:51:54 2018]  [<ffffffff813d599b>] ? sock_do_ioctl+0x1b/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffff813d5dc8>] ? sock_ioctl+0x1d8/0x2a0
[Wed Apr  4 19:51:54 2018]  [<ffffffff8110d0fe>] ? do_vfs_ioctl+0x20e/0x880
[Wed Apr  4 19:51:54 2018]  [<ffffffff81238f86>] ? apparmor_cred_prepare+0x26/0x40
[Wed Apr  4 19:51:54 2018]  [<ffffffff810f3417>] ? SyS_faccessat+0x197/0x2c0
[Wed Apr  4 19:51:54 2018]  [<ffffffff8110d7f0>] ? SyS_ioctl+0x80/0xa0
[Wed Apr  4 19:51:54 2018]  [<ffffffff814afeb2>] ? system_call_fastpath+0x16/0x1b
[Wed Apr  4 19:51:54 2018] ---[ end trace 14fdad943159d686 ]---
[Wed Apr  4 19:51:54 2018] ------------[ cut here ]------------
[Wed Apr  4 19:51:54 2018] WARNING: at kernel/irq/manage.c:1244 __free_irq+0xa7/0x200()
[Wed Apr  4 19:51:54 2018] Trying to free already-free IRQ 18
[Wed Apr  4 19:51:54 2018] Modules linked in: button ax88179_178a usbnet tg3 r8169 cnic bnx2 vmxnet3 pcnet32 e1000 sfc netxen_nic qlge qlcnic qla3xxx pch_gbe ptp_pch sky2 skge jme ipg uio alx atl1c atl1e atl1 libphy mii exfat(O) btrfs zlib_deflate hfsplus md4 hmac bnx2x(O) libcrc32c mdio mlx5_core(O) mlx4_en(O) mlx4_core(O) mlx_compat(O) compat(O) qede(O) qed(O) atlantic(O) r8168(O) tn40xx(O) i40e(O) ixgbe(O) be2net(O) igb(O) i2c_algo_bit e1000e(O) dca fuse vfat fat glue_helper lrw gf128mul ablk_helper sha512_generic arc4 cryptd ecryptfs sha256_generic sha1_generic ecb aes_x86_64 authenc des_generic ansi_cprng cts md5 cbc cpufreq_conservative cpufreq_powersave cpufreq_performance cpufreq_ondemand acpi_cpufreq mperf processor thermal_sys cpufreq_stats freq_table dm_snapshot
[Wed Apr  4 19:51:54 2018]  crc_itu_t crc_ccitt quota_v2 quota_tree psnap p8022 llc sit tunnel4 ip_tunnel ipv6 zram(C) sg etxhci_hcd mpt3sas mpt2sas(O) megaraid_sas ata_piix mptctl mptsas mptspi mptscsih mptbase scsi_transport_spi megaraid megaraid_mbox megaraid_mm vmw_pvscsi BusLogic usb_storage xhci_hcd uhci_hcd ohci_hcd ehci_pci ehci_hcd usbcore usb_common el000(O)
[Wed Apr  4 19:51:54 2018] CPU: 0 PID: 8840 Comm: ifconfig Tainted: P        WC O 3.10.102 #15266
[Wed Apr  4 19:51:54 2018] Hardware name: System manufacturer System Product Name/M4A78LT-M-LE, BIOS 0704    06/11/2010
[Wed Apr  4 19:51:54 2018]  ffffffff814a9ec3 ffffffff81032ee6 0000000000000000 ffff8800c74b3cf8
[Wed Apr  4 19:51:54 2018]  ffff8800caa4da80 0000000000000012 ffff8800caa4db0c ffffffff81032f47
[Wed Apr  4 19:51:54 2018]  ffffffff816f5e60 ffff880000000020 ffff8800c74b3d08 ffff8800c74b3cc8
[Wed Apr  4 19:51:54 2018] Call Trace:
[Wed Apr  4 19:51:54 2018]  [<ffffffff814a9ec3>] ? dump_stack+0xc/0x15
[Wed Apr  4 19:51:54 2018]  [<ffffffff81032ee6>] ? warn_slowpath_common+0x56/0x70
[Wed Apr  4 19:51:54 2018]  [<ffffffff81032f47>] ? warn_slowpath_fmt+0x47/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aacc25>] ? atl1c_alloc_rx_buffer+0x385/0x410 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffff8109c837>] ? __free_irq+0xa7/0x200
[Wed Apr  4 19:51:54 2018]  [<ffffffff8109ca0f>] ? free_irq+0x2f/0xa0
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aadddc>] ? atl1c_up+0x9c/0x190 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aab396>] ? atl1c_free_irq+0x16/0x40 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffffa0aae458>] ? atl1c_open+0x288/0x2e0 [atl1c]
[Wed Apr  4 19:51:54 2018]  [<ffffffff813ef92e>] ? __dev_open+0x7e/0xe0
[Wed Apr  4 19:51:54 2018]  [<ffffffff813efb81>] ? __dev_change_flags+0x91/0x140
[Wed Apr  4 19:51:54 2018]  [<ffffffff813efcb2>] ? dev_change_flags+0x12/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffff8144a12c>] ? devinet_ioctl+0x5fc/0x6c0
[Wed Apr  4 19:51:54 2018]  [<ffffffff813d599b>] ? sock_do_ioctl+0x1b/0x50
[Wed Apr  4 19:51:54 2018]  [<ffffffff813d5dc8>] ? sock_ioctl+0x1d8/0x2a0
[Wed Apr  4 19:51:54 2018]  [<ffffffff810d57f1>] ? vma_rb_erase+0x121/0x260
[Wed Apr  4 19:51:54 2018]  [<ffffffff8110d0fe>] ? do_vfs_ioctl+0x20e/0x880
[Wed Apr  4 19:51:54 2018]  [<ffffffff810d53ed>] ? remove_vma+0x4d/0x60
[Wed Apr  4 19:51:54 2018]  [<ffffffff810d7399>] ? do_munmap+0x359/0x4d0
[Wed Apr  4 19:51:54 2018]  [<ffffffff8110d7f0>] ? SyS_ioctl+0x80/0xa0
[Wed Apr  4 19:51:54 2018]  [<ffffffff814afeb2>] ? system_call_fastpath+0x16/0x1b
[Wed Apr  4 19:51:54 2018] ---[ end trace 14fdad943159d687 ]---
[Wed Apr  4 19:51:54 2018] ip_tables: (C) 2000-2006 Netfilter Core Team
[Wed Apr  4 19:51:54 2018] nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
[Wed Apr  4 19:51:54 2018] ip6_tables: (C) 2000-2006 Netfilter Core Team
[Wed Apr  4 19:51:55 2018] ------------[ cut here ]------------
[Wed Apr  4 19:51:55 2018] WARNING: at kernel/irq/manage.c:1244 __free_irq+0xa7/0x200()
[Wed Apr  4 19:51:55 2018] Trying to free already-free IRQ 18
[Wed Apr  4 19:51:55 2018] Modules linked in: nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter ip6_tables xt_recent xt_iprange xt_limit xt_state xt_tcpudp xt_multiport xt_LOG nf_conntrack_ipv4 nf_defrag_ipv4 nf_conntrack iptable_filter ip_tables x_tables button ax88179_178a usbnet tg3 r8169 cnic bnx2 vmxnet3 pcnet32 e1000 sfc netxen_nic qlge qlcnic qla3xxx pch_gbe ptp_pch sky2 skge jme ipg uio alx atl1c atl1e atl1 libphy mii exfat(O) btrfs zlib_deflate hfsplus md4 hmac bnx2x(O) libcrc32c mdio mlx5_core(O) mlx4_en(O) mlx4_core(O) mlx_compat(O) compat(O) qede(O) qed(O) atlantic(O) r8168(O) tn40xx(O) i40e(O) ixgbe(O) be2net(O) igb(O) i2c_algo_bit e1000e(O) dca fuse vfat fat glue_helper lrw gf128mul ablk_helper sha512_generic arc4 cryptd ecryptfs sha256_generic sha1_generic ecb
[Wed Apr  4 19:51:55 2018]  aes_x86_64 authenc des_generic ansi_cprng cts md5 cbc cpufreq_conservative cpufreq_powersave cpufreq_performance cpufreq_ondemand acpi_cpufreq mperf processor thermal_sys cpufreq_stats freq_table dm_snapshot crc_itu_t crc_ccitt quota_v2 quota_tree psnap p8022 llc sit tunnel4 ip_tunnel ipv6 zram(C) sg etxhci_hcd mpt3sas mpt2sas(O) megaraid_sas ata_piix mptctl mptsas mptspi mptscsih mptbase scsi_transport_spi megaraid megaraid_mbox megaraid_mm vmw_pvscsi BusLogic usb_storage xhci_hcd uhci_hcd ohci_hcd ehci_pci ehci_hcd usbcore usb_common el000(O)
[Wed Apr  4 19:51:55 2018] CPU: 1 PID: 10035 Comm: ifconfig Tainted: P        WC O 3.10.102 #15266
[Wed Apr  4 19:51:55 2018] Hardware name: System manufacturer System Product Name/M4A78LT-M-LE, BIOS 0704    06/11/2010
[Wed Apr  4 19:51:55 2018]  ffffffff814a9ec3 ffffffff81032ee6 0000000000000000 ffff8800c97dbcf8
[Wed Apr  4 19:51:55 2018]  ffff8800caa4da80 0000000000000012 ffff8800caa4db0c ffffffff81032f47
[Wed Apr  4 19:51:55 2018]  ffffffff816f5e60 ffff880000000020 ffff8800c97dbd08 ffff8800c97dbcc8
[Wed Apr  4 19:51:55 2018] Call Trace:
[Wed Apr  4 19:51:55 2018]  [<ffffffff814a9ec3>] ? dump_stack+0xc/0x15
[Wed Apr  4 19:51:55 2018]  [<ffffffff81032ee6>] ? warn_slowpath_common+0x56/0x70
[Wed Apr  4 19:51:55 2018]  [<ffffffff81032f47>] ? warn_slowpath_fmt+0x47/0x50
[Wed Apr  4 19:51:55 2018]  [<ffffffffa0aacc25>] ? atl1c_alloc_rx_buffer+0x385/0x410 [atl1c]
[Wed Apr  4 19:51:55 2018]  [<ffffffff8109c837>] ? __free_irq+0xa7/0x200
[Wed Apr  4 19:51:55 2018]  [<ffffffff8109ca0f>] ? free_irq+0x2f/0xa0
[Wed Apr  4 19:51:55 2018]  [<ffffffffa0aadddc>] ? atl1c_up+0x9c/0x190 [atl1c]
[Wed Apr  4 19:51:55 2018]  [<ffffffffa0aab396>] ? atl1c_free_irq+0x16/0x40 [atl1c]
[Wed Apr  4 19:51:55 2018]  [<ffffffffa0aae458>] ? atl1c_open+0x288/0x2e0 [atl1c]
[Wed Apr  4 19:51:55 2018]  [<ffffffff813ef92e>] ? __dev_open+0x7e/0xe0
[Wed Apr  4 19:51:55 2018]  [<ffffffff813efb81>] ? __dev_change_flags+0x91/0x140
[Wed Apr  4 19:51:55 2018]  [<ffffffff813efcb2>] ? dev_change_flags+0x12/0x50
[Wed Apr  4 19:51:55 2018]  [<ffffffff8144a12c>] ? devinet_ioctl+0x5fc/0x6c0
[Wed Apr  4 19:51:55 2018]  [<ffffffff810296e8>] ? __do_page_fault+0x1b8/0x480
[Wed Apr  4 19:51:55 2018]  [<ffffffff813d599b>] ? sock_do_ioctl+0x1b/0x50
[Wed Apr  4 19:51:55 2018]  [<ffffffff813d5dc8>] ? sock_ioctl+0x1d8/0x2a0
[Wed Apr  4 19:51:55 2018]  [<ffffffff8110d0fe>] ? do_vfs_ioctl+0x20e/0x880
[Wed Apr  4 19:51:55 2018]  [<ffffffff81238f86>] ? apparmor_cred_prepare+0x26/0x40
[Wed Apr  4 19:51:55 2018]  [<ffffffff810f3417>] ? SyS_faccessat+0x197/0x2c0
[Wed Apr  4 19:51:55 2018]  [<ffffffff8110d7f0>] ? SyS_ioctl+0x80/0xa0
[Wed Apr  4 19:51:55 2018]  [<ffffffff814afeb2>] ? system_call_fastpath+0x16/0x1b
[Wed Apr  4 19:51:55 2018] ---[ end trace 14fdad943159d688 ]---

    

Answer 1

Este log é um aviso do kernel indicando que provavelmente existe um bug em algum lugar no código do kernel.

Ele está dizendo a você que algo está tentando liberar o IRQ 18, mesmo que ele já tenha sido liberado antes. Como você tem isso repetidamente, sugere que algo está tentando libertá-lo de novo e de novo.

O campo Comm: mostra que ele está executando o comando ifconfig , em outras palavras, configurando uma interface de rede.

A pilha de chamadas também indica que parte do código está no módulo atl1c kernel, que acredito ser usado para o Atheros L1C Gigabit Ethernet, que é um adaptador de rede.

Portanto, parece haver uma correlação suficiente para sugerir um bug em algum lugar do driver para esse dispositivo.

Por outro lado, o messsage do kernel é apenas um "WARNING", então é possível que não seja realmente um bug (ou um bug crítico que causaria problemas), mas mais um problema com o design do driver (talvez está liberando o IRQ repetidamente por algum motivo ...)

A pesquisa de alguns desses termos no Google não apareceu muito ... Por isso, não tenho certeza se esse é um problema conhecido ou não.

O Kernel 3.10 é bem antigo ... É possível que isso tenha sido corrigido desde então, então talvez tentar um kernel mais recente (se for uma opção para você) seja uma boa idéia.