New: WARNING: at fs/proc/generic.c:317 __xlate_proc_name+0xbd/0xe0()

Bugme-new Andrew Morton 2 participants 2 messages Apr 26, 2010 – Jul 8, 2010 1 message not in the archive Media (V4L/DVB)

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Andrew Morton

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2010-04-26 22:20 UTC #1 lore raw

In reply to a message not in the archive

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).

Quoted 34 lines · On Wed, 21 Apr 2010 12:21:18 GMT [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=15826
           Summary: WARNING: at fs/proc/generic.c:317
                    __xlate_proc_name+0xbd/0xe0()
           Product: v4l-dvb
           Version: unspecified
    Kernel Version: 2.6.34-rc5
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: dvb-core
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: No
Created an attachment (id=26077)
--> (https://bugzilla.kernel.org/attachment.cgi?id=26077)
full dmesg
I keep getting this warning on boot. It seems to happen when the dvb driver for my "technisat skystar2" card is loaded (correct me if i'm wrong).
If you need more infos or debug stuff inside
my kernel config, please tell me what i need to include.
Thank you in advance.
----------------------------------------
...

Quoted 8 lines

[    0.739420] b2c2-flexcop: B2C2 FlexcopII/II(b)/III digital TV receiver chip
loaded successfully
[    0.739435] flexcop-pci: will use the HW PID filter.
[    0.739438] flexcop-pci: card revision 2
[    0.739442] b2c2_flexcop_pci 0000:04:01.0: PCI INT A -> GSI 17 (level, low)
-> IRQ 17
[    0.739459] ------------[ cut here ]------------
[    0.739463] WARNING: at fs/proc/generic.c:317 __xlate_proc_name+0xbd/0xe0()

Alexey, this sucks. A developer goes to the warning site:

static int __xlate_proc_name(const char *name, struct proc_dir_entry **ret,
const char **residual)

{
	const char     		*cp = name, *next;
	struct proc_dir_entry	*de;
	int			len;

	de = *ret;
	if (!de)
		de = &proc_root;

	while (1) {
		next = strchr(cp, '/');
		if (!next)
			break;

		len = next - cp;
		for (de = de->subdir; de ; de = de->next) {
			if (proc_match(len, cp, de))
				break;
		}
		if (!de) {
			WARN(1, "name '%s'\n", name);
			return -ENOENT;
		}
		cp += len + 1;
	}
	*residual = cp;
	*ret = de;
	return 0;
}

and there's no hint whatsoever to tell him what the warning means, nor how to fix it.

Please send a patch adding a nice comment to __xlate_proc_name(). Then perhaps the DVB guys have a chance of fixing this bug.

Thanks.

Quoted 41 lines

[    0.739465] Hardware name: P5K
[    0.739466] name 'Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver'
[    0.739467] Modules linked in:
[    0.739470] Pid: 1, comm: swapper Not tainted 2.6.34-rc5-v2k11+-dbg-dirty
#118
[    0.739471] Call Trace:
[    0.739476]  [<ffffffff8103e386>] warn_slowpath_common+0x76/0xb0
[    0.739478]  [<ffffffff8103e41c>] warn_slowpath_fmt+0x3c/0x40
[    0.739481]  [<ffffffff8110b4ad>] __xlate_proc_name+0xbd/0xe0
[    0.739483]  [<ffffffff8110b540>] __proc_create+0x70/0x140
[    0.739486]  [<ffffffff8110bf49>] proc_mkdir_mode+0x29/0x60
[    0.739488]  [<ffffffff8110bf91>] proc_mkdir+0x11/0x20
[    0.739491]  [<ffffffff8107b39b>] register_handler_proc+0x11b/0x140
[    0.739494]  [<ffffffff810791f9>] __setup_irq+0x1f9/0x390
[    0.739497]  [<ffffffff813ca790>] ? flexcop_pci_isr+0x0/0x3e0
[    0.739500]  [<ffffffff810794bc>] request_threaded_irq+0x12c/0x210
[    0.739502]  [<ffffffff813cad20>] flexcop_pci_probe+0x1b0/0x350
[    0.739505]  [<ffffffff811e4ee5>] pci_device_probe+0x75/0xa0
[    0.739509]  [<ffffffff8130522a>] ? driver_sysfs_add+0x5a/0x90
[    0.739511]  [<ffffffff813054f3>] driver_probe_device+0x93/0x1a0
[    0.739514]  [<ffffffff8130569b>] __driver_attach+0x9b/0xa0
[    0.739517]  [<ffffffff81305600>] ? __driver_attach+0x0/0xa0
[    0.739519]  [<ffffffff8130460e>] bus_for_each_dev+0x5e/0x90
[    0.739522]  [<ffffffff813051c9>] driver_attach+0x19/0x20
[    0.739524]  [<ffffffff81304d62>] bus_add_driver+0xb2/0x260
[    0.739527]  [<ffffffff8130590f>] driver_register+0x6f/0x130
[    0.739529]  [<ffffffff811e5171>] __pci_register_driver+0x51/0xd0
[    0.739533]  [<ffffffff818f49a9>] ? flexcop_pci_module_init+0x0/0x1b
[    0.739535]  [<ffffffff818f49c2>] flexcop_pci_module_init+0x19/0x1b
[    0.739538]  [<ffffffff810002d9>] do_one_initcall+0x39/0x1a0
[    0.739540]  [<ffffffff818d1cc4>] kernel_init+0x14d/0x1d7
[    0.739543]  [<ffffffff81003194>] kernel_thread_helper+0x4/0x10
[    0.739546]  [<ffffffff818d1b77>] ? kernel_init+0x0/0x1d7
[    0.739548]  [<ffffffff81003190>] ? kernel_thread_helper+0x0/0x10
[    0.739553] ---[ end trace 4e6b2faee55cb1bf ]---
[    0.744389] DVB: registering new adapter (FlexCop Digital TV device)
[    0.746102] b2c2-flexcop: MAC address = 00:d0:d7:0f:30:58
[    0.946350] b2c2-flexcop: found 'ST STV0299 DVB-S' .
[    0.946353] DVB: registering adapter 0 frontend 0 (ST STV0299 DVB-S)...
[    0.946422] b2c2-flexcop: initialization of 'Sky2PC/SkyStar 2 DVB-S rev 2.6'

at the 'PCI' bus controlled by a 'FlexCopIIb' complete

Boris Cuber

2010-07-08 19:42 UTC #2 lore raw

Still present in kernel-2.6.34.1.
The dvb card itself has been installed to another computer, different os (archlinux instead of gentoo), warning is still there.

[dmesg]...
b2c2-flexcop: B2C2 FlexcopII/II(b)/III digital TV receiver chip loaded successfully
flexcop-pci: will use the HW PID filter.
flexcop-pci: card revision 2
b2c2_flexcop_pci 0000:00:0b.0: PCI INT A -> GSI 19 (level, low) -> IRQ 19

------------[ cut here ]------------
WARNING: at fs/proc/generic.c:317 __xlate_proc_name+0xb3/0xc0()
Hardware name: System Name
name 'Technisat/B2C2 FlexCop II/IIb/III Digital TV PCI Driver'
Modules linked in: b2c2_flexcop_pci(+) i2c_viapro snd(+) soundcore

b2c2_flexcop dvb_core cx24123 cx24113 via_ircc uhci_hcd s5h1420 button thermal processor irda crc_ccitt ehci_hcd usbcore via_agp firewire_ohci firewire_core crc_itu_t shpchp pci_hotplug evdev psmouse via_rhine mii emu10k1_gp gameport sg serio_raw pcspkr rtc_cmos rtc_core rtc_lib ext4 mbcache jbd2 crc16 sr_mod cdrom sd_mod pata_via ata_generic pata_acpi floppy libata scsi_mod radeon ttm drm_kms_helper drm agpgart i2c_algo_bit i2c_core
Pid: 1187, comm: modprobe Not tainted 2.6.34-ARCH #1

Call Trace:
 [<c104317d>] warn_slowpath_common+0x6d/0xa0
 [<c113b553>] ? __xlate_proc_name+0xb3/0xc0
 [<c113b553>] ? __xlate_proc_name+0xb3/0xc0
 [<c10431f6>] warn_slowpath_fmt+0x26/0x30
 [<c113b553>] __xlate_proc_name+0xb3/0xc0
 [<c113b5b9>] __proc_create+0x59/0x100
 [<c113bed3>] proc_mkdir_mode+0x23/0x50
 [<c113bf0f>] proc_mkdir+0xf/0x20
 [<c10986ab>] register_handler_proc+0xeb/0x110
 [<c1096a3f>] __setup_irq+0x19f/0x2f0
 [<c10e950c>] ? kmem_cache_alloc_notrace+0x7c/0xb0
 [<f8ce7140>] ? flexcop_pci_isr+0x0/0x140 [b2c2_flexcop_pci]
 [<c1096c6e>] request_threaded_irq+0xde/0x1c0
 [<c1027516>] ? ioremap_nocache+0x16/0x20
 [<f8ce73e0>] flexcop_pci_probe+0x160/0x2b0 [b2c2_flexcop_pci]
 [<c119ad56>] pci_device_probe+0x56/0x80
 [<c1215a27>] driver_probe_device+0x77/0x180
 [<c1215ba9>] __driver_attach+0x79/0x80
 [<c1214c83>] bus_for_each_dev+0x43/0x70
 [<c1215779>] driver_attach+0x19/0x20
 [<c1215b30>] ? __driver_attach+0x0/0x80
 [<c121533d>] bus_add_driver+0xbd/0x2d0
 [<c119aca0>] ? pci_device_remove+0x0/0x40
 [<c1215da5>] driver_register+0x65/0x110
 [<c119af80>] __pci_register_driver+0x40/0xb0
 [<f8cf4017>] flexcop_pci_module_init+0x17/0x19 [b2c2_flexcop_pci]
 [<c100120d>] do_one_initcall+0x2d/0x190
 [<f8cf4000>] ? flexcop_pci_module_init+0x0/0x19 [b2c2_flexcop_pci]
 [<c1078fed>] sys_init_module+0xad/0x210
 [<c10d8ec9>] ? sys_mmap_pgoff+0x89/0x110
 [<c100379f>] sysenter_do_call+0x12/0x28
---[ end trace d65de7b15fba8e1f ]---

DVB: registering new adapter (FlexCop Digital TV device)
b2c2-flexcop: MAC address = 00:d0:d7:0f:30:58
CX24123: cx24123_i2c_readreg: reg=0x0 (error=-121)
CX24123: wrong demod revision: 87
usb 2-2: new low speed USB device using uhci_hcd and address 3
b2c2-flexcop: found 'ST STV0299 DVB-S' .
DVB: registering adapter 0 frontend 0 (ST STV0299 DVB-S)...
b2c2-flexcop: initialization of 'Sky2PC/SkyStar 2 DVB-S rev 2.6' at the 'PCI' bus controlled by a 'FlexCopIIb' complete
...
[dmesg]

Am Dienstag, 27. April 2010 schrieb Andrew Morton:

Quoted 144 lines

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).

On Wed, 21 Apr 2010 12:21:18 GMT

Quoted 53 lines · [email protected] wrote:

https://bugzilla.kernel.org/show_bug.cgi?id=15826
           Summary: WARNING: at fs/proc/generic.c:317
           
                    __xlate_proc_name+0xbd/0xe0()
           
           Product: v4l-dvb
           Version: unspecified
    
    Kernel Version: 2.6.34-rc5
    
          Platform: All
        
        OS/Version: Linux
        
              Tree: Mainline
            
            Status: NEW
          
          Severity: normal
          Priority: P1
         
         Component: dvb-core
        
        AssignedTo: [email protected]
        ReportedBy: [email protected]
        Regression: No
Created an attachment (id=26077)
--> (https://bugzilla.kernel.org/attachment.cgi?id=26077)
full dmesg
I keep getting this warning on boot. It seems to happen when the dvb driver for my "technisat skystar2" card is loaded (correct me if i'm wrong).
If you need more infos or debug stuff inside
my kernel config, please tell me what i need to include.
Thank you in advance.
----------------------------------------
...
[    0.739420] b2c2-flexcop: B2C2 FlexcopII/II(b)/III digital TV receiver
chip loaded successfully
[    0.739435] flexcop-pci: will use the HW PID filter.
[    0.739438] flexcop-pci: card revision 2
[    0.739442] b2c2_flexcop_pci 0000:04:01.0: PCI INT A -> GSI 17 (level,
low) -> IRQ 17
[    0.739459] ------------[ cut here ]------------
[    0.739463] WARNING: at fs/proc/generic.c:317

Quoted 1 line

__xlate_proc_name+0xbd/0xe0()