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Date: Fri, 11 Dec 2015 17:07:54 +0200 From: Andrew <nitr0@...i.kr.ua> To: netdev@...r.kernel.org Subject: Another pppoe-related crash I've got another pppoe-related crash on one PPPoE BRAS. Kernel is 4.1.13 with patch "pppoe: fix memory corruption in padt work structure" Crash place: (gdb) list *unregister_sysctl_table+0x1a 0xc118f26a is in unregister_sysctl_table (/var/testpoint/LEAF/source/i486-unknown-linux-uclibc/linux/linux-4.1/fs/proc/proc_sysctl.c:1573). 1568 might_sleep(); 1569 1570 if (header == NULL) 1571 return; 1572 1573 nr_subheaders = count_subheaders(header->ctl_table_arg); 1574 if (unlikely(nr_subheaders > 1)) { 1575 struct ctl_table_header **subheaders; 1576 int i; 1577 Here's trace: [587692.546567] BUG: unable to handle kernel paging request at 05040214 [587692.546602] IP: [<c118f26a>] unregister_sysctl_table+0x1a/0x80 [587692.546626] *pdpt = 000000001d6a9001 *pde = 0000000000000000 [587692.546643] Oops: 0000 [#1] SMP [587692.546657] Modules linked in: act_mirred pppoe pppox ppp_generic slhc iptable_filter xt_length xt_TCPMSS xt_tcpudp xt_mark xt_dscp iptable_mangle ip_tables x_tables ipv6 sch_sfq sch_htb cls_u32 sch_ingress sch_prio sch_tbf cls_flow cls_fw act_police ifb 8021q mrp garp stp llc softdog thermal parport_pc parport acpi_cpufreq processor asus_atk0110 fan thermal_sys igb(O) k10temp hwmon dca ptp pps_core ohci_pci ohci_hcd i2c_nforce2 i2c_core nv_tco sd_mod pata_acpi pcspkr ehci_pci pata_amd sata_nv ata_generic ehci_hcd libata usbcore scsi_mod usb_common ext4 mbcache jbd2 crc16 vfat fat isofs [587692.546828] CPU: 0 PID: 7260 Comm: ip-down Tainted: G W O 4.1.13-i686 #1 [587692.546851] Hardware name: System manufacturer System Product Name/M2N-SLI DELUXE, BIOS ASUS M2N-SLI DELUXE ACPI BIOS Revision 5001 02/04/2010 [587692.546875] task: dfa89b60 ti: debae000 task.ti: debae000 [587692.546891] EIP: 0060:[<c118f26a>] EFLAGS: 00210206 CPU: 0 [587692.546906] EIP is at unregister_sysctl_table+0x1a/0x80 [587692.546919] EAX: 05040200 EBX: 05040200 ECX: 00000000 EDX: 00000000 [587692.546932] ESI: df359b0c EDI: df359b00 EBP: debafe54 ESP: debafe48 [587692.546946] DS: 007b ES: 007b FS: 00d8 GS: 0000 SS: 0068 [587692.546959] CR0: 8005003b CR2: 05040214 CR3: 1827b740 CR4: 000006f0 [587692.546971] Stack: [587692.546981] d613f000 df359b0c df359b00 debafe60 c13783bc d613c000 debafea8 c13789bf [587692.547008] 00200246 d9d156e0 f6db82a0 f6401e00 debafe9c c112dc17 f920844b f920844b [587692.547035] d613c000 c132a8fd 00000008 cbe14800 00200246 c1523ff8 c1524264 00000000 [587692.547060] Call Trace: [587692.547079] [<c13783bc>] ? __devinet_sysctl_unregister.isra.19+0x1c/0x30 [587692.547094] [<c13789bf>] ? inetdev_event+0x17f/0x4c0 [587692.547110] [<c112dc17>] ? kfree+0xf7/0x130 [587692.547126] [<f920844b>] ? htb_destroy+0xbb/0x100 [sch_htb] [587692.547142] [<f920844b>] ? htb_destroy+0xbb/0x100 [sch_htb] [587692.547158] [<c132a8fd>] ? fib_rules_event+0x1d/0x1b0 [587692.547174] [<c1065fdd>] ? notifier_call_chain+0x4d/0x70 [587692.547189] [<c106610f>] ? raw_notifier_call_chain+0x1f/0x30 [587692.547205] [<c130d386>] ? rollback_registered_many+0x146/0x280 [587692.547222] [<c107f811>] ? mutex_optimistic_spin+0x101/0x190 [587692.547236] [<c130d4e4>] ? rollback_registered+0x24/0x40 [587692.547251] [<c130e6e7>] ? unregister_netdevice_queue+0x57/0xc0 [587692.547265] [<c130e76d>] ? unregister_netdev+0x1d/0x30 [587692.547281] [<f952b614>] ? ppp_shutdown_interface+0xd4/0xf0 [ppp_generic] [587692.547297] [<f952d107>] ? ppp_release+0x67/0x70 [ppp_generic] [587692.547312] [<f952d0fc>] ? ppp_release+0x5c/0x70 [ppp_generic] [587692.547327] [<c1139fc4>] ? __fput+0x84/0x1b0 [587692.547343] [<c1063d39>] ? task_work_run+0xa9/0xd0 [587692.547357] [<c13bb415>] ? work_notifysig+0x16/0x1d [587692.547369] Code: 9e 22 00 b8 84 2f 5f c1 e8 44 bb 22 00 eb 9d 66 90 55 89 e5 83 ec 0c 89 5d f4 89 75 f8 89 7d fc 3e 8d 74 26 00 85 c0 89 c3 74 25 <8b> 40 14 e8 ce f6 ff ff 83 f8 01 7f 25 b8 84 2f 5f c1 e8 0f bb [587692.547458] EIP: [<c118f26a>] unregister_sysctl_table+0x1a/0x80 SS:ESP 0068:debafe48 [587692.547481] CR2: 0000000005040214 [587692.547675] ---[ end trace fbeed93ca56120ba ]--- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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