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#62 ni_usb_gpib (and more?) broken if kernel feature CONFIG_VMAP_STACK is set (default in 4.9 and later?)
All device access fails. Example:
hana ~ # ibterm -d 1 Attempting to open /dev/gpib0 pad = 1, sad = 0, timeout = 10, send_eoi = 1, eos_mode = 0x0000 libgpib: IBOPENDEV ioctl failed libgpib: error in is_cic()! ibterm error: open failed - EDVR 0: OS error ibdev error ibterm: Aborted
From dmesg:
[ 4.347778] Linux-GPIB 4.0.3 Driver [ 4.348568] ni_usb_gpib driver loading [ 4.348578] ni_usb_gpib: probe succeeded for path: usb-0000:00:1a.0-1.4 [ 4.348587] usbcore: registered new interface driver ni_usb_gpib [ 4.348587] gpib: registered ni_usb_b interface [ 4.350115] ni_usb_gpib: attach [ 4.350116] attached to bus interface 0, address 0xffff880213685400 [ 4.359361] product id=0x709b [ 4.359365] ------------[ cut here ]------------ [ 4.359372] WARNING: CPU: 0 PID: 1848 at drivers/usb/core/hcd.c:1587 usb_hcd_map_urb_for_dma+0x33f/0x484 [ 4.359372] transfer buffer not dma capable [ 4.359373] Modules linked in: ni_usb_gpib(O) gpib_common(O) nvidia(PO) x86_pkg_temp_thermal [ 4.359380] CPU: 0 PID: 1848 Comm: gpib_config Tainted: P O 4.9.25-gentoo #1 [ 4.359381] Hardware name: Dell Inc. OptiPlex 7010/0KRC95, BIOS A05 07/31/2012 [ 4.359383] ffffc90000f579c0 ffffffff8125be6c ffffc90000f57a10 0000000000000000 [ 4.359395] ffffc90000f57a00 ffffffff81076912 0000063300f57a78 ffff880213ec6000 [ 4.359396] ffff880213cc5800 0000000002400000 0000000000000002 0000000000000200 [ 4.359398] Call Trace: [ 4.359401] [<ffffffff8125be6c>] dump_stack+0x4d/0x63 [ 4.359404] [<ffffffff81076912>] __warn+0xb8/0xd3 [ 4.359405] [<ffffffff81076973>] warn_slowpath_fmt+0x46/0x4e [ 4.359407] [<ffffffff814b4997>] usb_hcd_map_urb_for_dma+0x33f/0x484 [ 4.359408] [<ffffffff814b59d5>] usb_hcd_submit_urb+0x6c3/0x791 [ 4.359411] [<ffffffff8165c027>] ? schedule_timeout+0x1ab/0x1d6 [ 4.359412] [<ffffffff814b67ef>] usb_submit_urb+0x42c/0x441 [ 4.359415] [<ffffffff81095e5b>] ? sched_clock_cpu+0x15/0x94 [ 4.359417] [<ffffffff814b6d18>] usb_start_wait_urb+0x59/0xc9 [ 4.359418] [<ffffffff814b6e4e>] usb_control_msg+0xc6/0xeb [ 4.359420] [<ffffffffa0c94846>] ni_usb_receive_control_msg+0x93/0xb4 [ni_usb_gpib] [ 4.359422] [<ffffffffa0c96fe4>] ni_usb_attach+0x330/0xad0 [ni_usb_gpib] [ 4.359424] [<ffffffffa0c8b799>] ibonline+0x53/0xed [gpib_common] [ 4.359425] [<ffffffffa0c896a6>] ibioctl+0x2df/0x17b3 [gpib_common] [ 4.359428] [<ffffffff811403e0>] vfs_ioctl+0x13/0x2f [ 4.359429] [<ffffffff81140909>] do_vfs_ioctl+0x495/0x503 [ 4.359430] [<ffffffff8113cce9>] ? putname+0x44/0x47 [ 4.359431] [<ffffffff811409b5>] SyS_ioctl+0x3e/0x5c [ 4.359433] [<ffffffff8165cbe0>] entry_SYSCALL_64_fastpath+0x13/0x94 [ 4.359434] ---[ end trace 87083574f9fe142b ]--- [ 4.359435] /home/portage/tmp/portage/sci-libs/linux-gpib-4.0.3-r1/work/linux-gpib-4.0.3/drivers/gpib/ni_usb/ni_usb_gpib.c: usb_control_msg request 0x41 returned -11 [ 4.360104] gpib: interface attach failed
More information on request... will also try to do some digging on my own.
OK I managed to circumvent this this problem.
Background information: https://lwn.net/Articles/692208/ "Virtually mapped kernel stacks"
On a 4.9 kernel the driver works fine if the configuration option CONFIG_VMAP_STACK is disabled.
Since this option is in principle also a security enhancement, that's a clear workaround.
Hi Andreas,
There is a 4.0.4rc2 tarball in the 4.0.4
https://sourceforge.net/projects/linux-gpib/files/linux-gpib%20for%203.x.x%20and%202.6.x%20kernels/4.0.4/
folder
that should fix the problem.
cheers,
/d
On Mon, May 29, 2017 at 4:16 PM, Andreas Huettel dilfridge@users.sf.net
wrote:
Related
Bugs:
#62Yep, this is fixed now.