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Date: Fri, 3 Oct 2008 13:34:13 +0200 (CEST) From: Vit Kudrle <kudrle@....muni.cz> To: linux-kernel@...r.kernel.org Subject: Kernel Oops in USB HID Hi, this morning I found in my logs following kernel Oops: Oct 3 01:11:06 apcupsd[4334]: Power failure. Oct 3 01:11:08 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:12:24 apcupsd[4334]: Power failure. Oct 3 01:12:27 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:12:39 apcupsd[4334]: Power failure. Oct 3 01:12:41 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:14:57 apcupsd[4334]: Power failure. Oct 3 01:15:01 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:15:10 apcupsd[4334]: Power failure. Oct 3 01:15:13 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:15:55 apcupsd[4334]: Power failure. Oct 3 01:15:58 apcupsd[4334]: Power is back. UPS running on mains. Oct 3 01:16:58 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 01:16:58 kernel: usb 2-7: USB disconnect, address 39 Oct 3 01:16:58 kernel: drivers/hid/usbhid/hid-core.c: usb_submit_urb(ctrl) failed Oct 3 01:16:58 kernel: BUG: unable to handle kernel NULL pointer dereference at 00000000000000c8 Oct 3 01:16:58 kernel: IP: [<ffffffff803b0755>] hiddev_ioctl+0x39/0x552 Oct 3 01:16:58 kernel: PGD 1d894067 PUD 1d9f1067 PMD 0 Oct 3 01:16:58 kernel: Oops: 0000 [1] PREEMPT Oct 3 01:16:58 kernel: CPU 0 Oct 3 01:16:58 kernel: Modules linked in: nls_cp437 nls_iso8859_1 parport_pc parport 8250_pnp 8250 serial_core Oct 3 01:16:58 kernel: Pid: 4334, comm: apcupsd Not tainted 2.6.26 #2 Oct 3 01:16:58 kernel: RIP: 0010:[<ffffffff803b0755>] [<ffffffff803b0755>] hiddev_ioctl+0x39/0x552 Oct 3 01:16:58 kernel: RSP: 0018:ffff81001d917e38 EFLAGS: 00010246 Oct 3 01:16:58 kernel: RAX: 0000000000000000 RBX: ffff81002f61c000 RCX: 00007fffa5f44be0 Oct 3 01:16:58 kernel: RDX: 00000000fffffffb RSI: ffff81003ecfe800 RDI: ffff81001d9af880 Oct 3 01:16:58 kernel: RBP: 00007fffa5f44be0 R08: 00000000400c4807 R09: 0000000000000000 Oct 3 01:16:58 kernel: R10: 00007fffa5f44c50 R11: 0000000000000246 R12: 00000000400c4807 Oct 3 01:16:58 kernel: R13: 00000000fffffff7 R14: 00000000400c4807 R15: 0000000000000000 Oct 3 01:16:58 kernel: FS: 00007f909df356d0(0000) GS:ffffffff8052d000(0000) knlGS:0000000008277840 Oct 3 01:16:58 kernel: CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b Oct 3 01:16:58 kernel: CR2: 00000000000000c8 CR3: 000000001da87000 CR4: 00000000000006e0 Oct 3 01:16:58 kernel: DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 Oct 3 01:16:58 kernel: DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Oct 3 01:16:58 kernel: Process apcupsd (pid: 4334, threadinfo ffff81001d916000, task ffff81003f2d3b20) Oct 3 01:16:58 kernel: Stack: ffff81003f4311a8 ffff810010e75e48 ffff81001d917eb8 ffffffff8042741d Oct 3 01:16:58 kernel: ffff81001d917ed8 ffff81003f2d3b20 ffffffff804f2320 ffff81003f2d3d60 Oct 3 01:16:58 kernel: 000431f4b55a2feb 0000000000000296 0000000000000282 0000000000000292 Oct 3 01:16:58 kernel: Call Trace: Oct 3 01:16:58 kernel: [<ffffffff8042741d>] ? thread_return+0x65/0xb5 Oct 3 01:16:58 kernel: [<ffffffff8023977e>] ? hrtimer_cancel+0xc/0x16 Oct 3 01:16:58 kernel: [<ffffffff80428080>] ? do_nanosleep+0x61/0x99 Oct 3 01:16:58 kernel: [<ffffffff8027a569>] ? vfs_ioctl+0x55/0x6b Oct 3 01:16:58 kernel: [<ffffffff8027a7d1>] ? do_vfs_ioctl+0x252/0x26b Oct 3 01:16:58 kernel: [<ffffffff8027a826>] ? sys_ioctl+0x3c/0x5e Oct 3 01:16:58 kernel: [<ffffffff8020b07b>] ? system_call_after_swapgs+0x7b/0x80 Oct 3 01:16:58 kernel: Oct 3 01:16:58 kernel: Oct 3 01:16:58 kernel: Code: 53 48 81 ec 90 00 00 00 48 8b b6 88 00 00 00 48 8b be 18 06 00 00 48 8b 5f 18 83 3f 00 48 8b 83 80 18 00 00 4c 8b 8b b8 19 00 00 <48> 8b 88 c8 00 00 00 0f 84 fe 04 00 00 41 81 f8 01 48 04 80 0f Oct 3 01:16:58 kernel: RIP [<ffffffff803b0755>] hiddev_ioctl+0x39/0x552 Oct 3 01:16:58 kernel: RSP <ffff81001d917e38> Oct 3 01:16:58 kernel: CR2: 00000000000000c8 Oct 3 01:16:58 kernel: ---[ end trace 91d6a9f7154b114c ]--- Oct 3 01:16:59 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 46 Oct 3 01:16:59 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 01:16:59 kernel: hiddev96: USB HID v1.00 Device [American Power Conversion Back-UPS 500 FW: 6.4.I USB FW: c1 ] on usb-0000:00:02.0-7 Oct 3 06:16:20 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 06:16:20 kernel: usb 2-7: USB disconnect, address 46 Oct 3 06:16:20 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 47 Oct 3 06:16:20 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 06:16:21 kernel: hiddev96: USB HID v1.00 Device [American Power Conversion Back-UPS 500 FW: 6.4.I USB FW: c1 ] on usb-0000:00:02.0-7 Oct 3 06:16:26 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 06:16:26 kernel: usb 2-7: USB disconnect, address 47 Oct 3 06:16:26 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 48 Oct 3 06:16:26 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 06:16:26 kernel: usbhid: ctrl urb status -62 received Oct 3 06:16:26 last message repeated 14 times Oct 3 06:16:26 kernel: hiddev96: USB HID v1.00 Device [American Power Conversion Back-UPS 500 FW: 6.4.I USB FW: c1 ] on usb-0000:00:02.0-7 Oct 3 06:16:26 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 06:16:26 kernel: usb 2-7: USB disconnect, address 48 Oct 3 06:16:27 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 49 Oct 3 06:16:27 kernel: usb 2-7: string descriptor 0 too short Oct 3 06:16:27 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 06:17:18 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 06:17:18 kernel: usb 2-7: USB disconnect, address 49 Oct 3 06:17:18 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 50 Oct 3 06:17:19 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 06:17:19 kernel: hiddev96: USB HID v1.00 Device [American Power Conversion Back-UPS 500 FW: 6.4.I USB FW: c1 ] on usb-0000:00:02.0-7 Oct 3 06:20:50 kernel: hub 2-0:1.0: port 7 disabled by hub (EMI?), re-enabling... Oct 3 06:20:50 kernel: usb 2-7: USB disconnect, address 50 Oct 3 06:20:50 kernel: usb 2-7: new low speed USB device using ohci_hcd and address 51 Oct 3 06:20:50 kernel: usb 2-7: configuration #1 chosen from 1 choice Oct 3 06:20:51 kernel: hiddev96: USB HID v1.00 Device [American Power Conversion Back-UPS 500 FW: 6.4.I USB FW: c1 ] on usb-0000:00:02.0-7 My UPS unit is actually quite bad, it often detects blackout when nothing happens and so it cycles a lot (see the beginning of the log). Also, sometimes it fails to be recognised by usb/hid subsystem (see the log around 6 am). However, kernel oops never happened before. Therefore, I am not able to reproduce the bug. I am running Debian patched kernel 2.6.26, which I manually configured and compiled for amd64 from package "linux-source-2.6.26_2.6.26-2_all.deb". Relevant config options are, of course, CONFIG_PREEMPT=y CONFIG_USB_HIDDEV=y This bug is probably benign, but still, somebody should look into it deeper. Vit -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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