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Date: Mon, 25 Oct 2010 12:22:36 +0300 From: Denys Fedoryshchenko <nuclearcat@...learcat.com> To: Thomas Gleixner <tglx@...utronix.de>, Paul Mackerras <paulus@...ba.org>, linux-kernel@...r.kernel.org, netdev@...r.kernel.org Subject: 2.6.35->2.6.36 regression, vanilla kernel panic, ppp or hrtimers crashing Hi Here is what i got from netconsole [ 259.238755] BUG: unable to handle kernel paging request at f8ba001c [ 259.238953] IP: [<c0199ebe>] do_select+0x2cc/0x502 [ 259.239008] *pdpt = 0000000000a55001 *pde = 0000000036dd6067 *pte = 0000000000000000 [ 259.239008] Oops: 0000 [#1] SMP [ 259.239008] last sysfs file: /sys/devices/pnp0/00:02/rtc/rtc0/dev [ 259.239008] Modules linked in: rtc_cmos rtc_core rtc_lib act_skbedit sch_ingress sch_prio configfs cls_flow cls_u32 em_meta cls_basic xt_dscp ipt_REJECT ts_bm xt_string xt_hl ifb cls_fw sch_tbf sch_htb act_ipt act_mirred pppoe pppox ppp_generic slhc ipt_REDIRECT ipt_MASQUERADE xt_TCPMSS xt_DSCP xt_mark xt_tcpudp iptable_mangle iptable_nat nf_nat nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 iptable_filter ip_tables x_tables 8021q garp stp llc loop usb_storage iTCO_wdt iTCO_vendor_support ata_generic pata_acpi ata_piix libata 8139cp sr_mod cdrom tulip r8169 sky2 via_velocity via_rhine sis900 ne2k_pci 8390 skge tg3 libphy 8139too e1000 e100 usbhid ohci_hcd uhci_hcd ehci_hcd usbcore nls_base [ 259.239008] [ 259.239008] Pid: 3307, comm: pppd Not tainted 2.6.36-build-0053 #14 D915GAV / [ 259.239008] EIP: 0060:[<c0199ebe>] EFLAGS: 00010286 CPU: 0 [ 259.239008] EIP is at do_select+0x2cc/0x502 [ 259.239008] EAX: f610a600 EBX: 00000080 ECX: f8ba0000 EDX: f60f1808 [ 259.239008] ESI: 00000000 EDI: f610a600 EBP: f60eae4c ESP: f60eab64 [ 259.239008] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 259.239008] Process pppd (pid: 3307, ti=f60ea000 task=f66a0000 task.ti=f60ea000) [ 259.239008] Stack: [ 259.239008] 0e95bb42 0000003d 000000d0 00000000 f60eaf60 f66a0000 f60eae6c f60eae70 [ 259.239008] <0> f60eae74 f60eae60 f60eae64 f60eae68 00000180 00000020 010eabdc 002dc698 [ 259.239008] <0> f60eae34 00000180 00000000 00000180 00000000 00000000 00000000 00000000 [ 259.239008] Call Trace: [ 259.239008] [<c019a484>] ? __pollwait+0x0/0xa5 [ 259.239008] [<c019a529>] ? pollwake+0x0/0x63 [ 259.239008] [<c019a529>] ? pollwake+0x0/0x63 [ 259.239008] [<c0143f37>] ? sched_clock_local+0x17/0x13d [ 259.239008] [<c0122ac4>] ? update_curr+0x84/0x15c [ 259.239008] [<c011f5a3>] ? kmap_atomic_prot+0xe1/0xe3 [ 259.239008] [<c0143f37>] ? sched_clock_local+0x17/0x13d [ 259.239008] [<c02044ee>] ? put_dec+0x2a/0x74 [ 259.239008] [<c0204689>] ? number+0x151/0x223 [ 259.239008] [<c012461f>] ? dequeue_task_fair+0x283/0x28b [ 259.239008] [<c0123845>] ? __dequeue_entity+0x23/0x27 [ 259.239008] [<c01238d6>] ? set_next_entity+0x8d/0xf7 [ 259.239008] [<c012889c>] ? finish_task_switch+0x33/0x7a [ 259.239008] [<c02f931c>] ? schedule+0x5c0/0x5ff [ 259.239008] [<c019a208>] ? core_sys_select+0x114/0x190 [ 259.239008] [<c015ce1c>] ? call_rcu_sched+0xd/0xf [ 259.239008] [<c015ce26>] ? call_rcu+0x8/0xa [ 259.239008] [<c012f80b>] ? release_task+0x28d/0x29d [ 259.239008] [<c012fc80>] ? wait_consider_task+0x465/0x7b7 [ 259.239008] [<c013fa7f>] ? spin_unlock_irqrestore+0x8/0xa [ 259.239008] [<c013fc10>] ? remove_wait_queue+0x31/0x36 [ 259.239008] [<f8bacff1>] ? ppp_read+0x101/0x145 [ppp_generic] [ 259.239008] [<c0145ceb>] ? timekeeping_get_ns+0x11/0x4f [ 259.239008] [<c014688a>] ? ktime_get_ts+0x89/0x93 [ 259.239008] [<c019a42e>] ? sys_select+0x68/0x84 [ 259.239008] [<c02fa625>] ? syscall_call+0x7/0xb [ 259.239008] Code: 85 9d 48 fd ff ff 0f 84 cb 00 00 00 8b 85 7c fd ff ff 8d 55 f0 e8 c1 55 ff ff 85 c0 89 c7 0f 84 b3 00 00 00 8b 48 10 85 c9 74 3a 79 1c 00 74 34 85 f6 74 25 c7 46 04 02 00 00 00 85 9d 5c fd [ 259.239008] EIP: [<c0199ebe>] do_select+0x2cc/0x502 SS:ESP 0068:f60eab64 [ 259.239008] CR2: 00000000f8ba001c [ 259.239008] ---[ end trace a6117b9e067aeb87 ]--- [ 259.239008] Kernel panic - not syncing: Fatal exception [ 259.239008] Pid: 3307, comm: pppd Tainted: G D 2.6.36-build-0053 #14 [ 259.239008] Call Trace: [ 259.239008] [<c02f8ace>] ? printk+0xf/0x11 [ 259.239008] [<c02f89cb>] panic+0x50/0x144 [ 259.239008] [<c0105061>] oops_end+0x8b/0x9a [ 259.239008] [<c011af70>] no_context+0x13e/0x148 [ 259.239008] [<c0142b8c>] ? hrtimer_try_to_cancel+0x60/0x69 [ 259.239008] [<c011b05f>] __bad_area_nosemaphore+0xe5/0xed [ 259.239008] [<c011b074>] bad_area_nosemaphore+0xd/0x10 [ 259.239008] [<c011b2d6>] do_page_fault+0xf6/0x230 [ 259.239008] [<c011b1e0>] ? do_page_fault+0x0/0x230 [ 259.239008] [<c02fac22>] error_code+0x5a/0x60 [ 259.239008] [<c019007b>] ? grab_super+0x30/0x56 [ 259.239008] [<c011b1e0>] ? do_page_fault+0x0/0x230 [ 259.239008] [<c0199ebe>] ? do_select+0x2cc/0x502 [ 259.239008] [<c019a484>] ? __pollwait+0x0/0xa5 [ 259.239008] [<c019a529>] ? pollwake+0x0/0x63 [ 259.239008] [<c019a529>] ? pollwake+0x0/0x63 [ 259.239008] [<c0143f37>] ? sched_clock_local+0x17/0x13d [ 259.239008] [<c0122ac4>] ? update_curr+0x84/0x15c [ 259.239008] [<c011f5a3>] ? kmap_atomic_prot+0xe1/0xe3 [ 259.239008] [<c0143f37>] ? sched_clock_local+0x17/0x13d [ 259.239008] [<c02044ee>] ? put_dec+0x2a/0x74 [ 259.239008] [<c0204689>] ? number+0x151/0x223 [ 259.239008] [<c012461f>] ? dequeue_task_fair+0x283/0x28b [ 259.239008] [<c0123845>] ? __dequeue_entity+0x23/0x27 [ 259.239008] [<c01238d6>] ? set_next_entity+0x8d/0xf7 [ 259.239008] [<c012889c>] ? finish_task_switch+0x33/0x7a [ 259.239008] [<c02f931c>] ? schedule+0x5c0/0x5ff [ 259.239008] [<c019a208>] core_sys_select+0x114/0x190 [ 259.239008] [<c015ce1c>] ? call_rcu_sched+0xd/0xf [ 259.239008] [<c015ce26>] ? call_rcu+0x8/0xa [ 259.239008] [<c012f80b>] ? release_task+0x28d/0x29d [ 259.239008] [<c012fc80>] ? wait_consider_task+0x465/0x7b7 [ 259.239008] [<c013fa7f>] ? spin_unlock_irqrestore+0x8/0xa [ 259.239008] [<c013fc10>] ? remove_wait_queue+0x31/0x36 [ 259.239008] [<f8bacff1>] ? ppp_read+0x101/0x145 [ppp_generic] [ 259.239008] [<c0145ceb>] ? timekeeping_get_ns+0x11/0x4f [ 259.239008] [<c014688a>] ? ktime_get_ts+0x89/0x93 [ 259.239008] [<c019a42e>] sys_select+0x68/0x84 [ 259.239008] [<c02fa625>] syscall_call+0x7/0xb [ 259.239008] Rebooting in 5 seconds.. It is not easy to do full git bisect(it is semi-embedded distro), but i can try reversing particular commits, if someone can give idea which one, and can try debug patches. -- 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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