Messages in this thread | | | Date | Wed, 04 Jun 2014 13:05:03 -0400 | From | Mike Remski <> | Subject | Re: ftdi_sio BUG: NULL pointer dereference |
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On 06/04/2014 12:00 PM, Johan Hovold wrote: > On Wed, Jun 04, 2014 at 11:41:47AM -0400, Mike Remski wrote: >> Ok, had a chance to try the cdc-acm; yes it's the ancient one that is >> in the base install of CentOS 6.4 (2.6.32-71.29.1 centos patched). I'm >> hitting something similar; I noticed there where a few commits for NULL >> pointer dereferences in cdc-acm.c. >> >> I'll poke into this a bit (yes, I know try a newer kernel, etc) and let >> you know what I find (or perhaps this looks similar to something already >> seen?). This device is the same as the original ftdi crash, 1.2 is the >> same interface with bNumEndpoints == 0. >> >> Jun 4 11:35:20 nicA91A84 kernel: cdc_acm 5-2:1.2: This device cannot do >> calls on its own. It is not a modem. >> Jun 4 11:35:20 nicA91A84 kernel: BUG: unable to handle kernel NULL >> pointer dereference at 00000004 >> Jun 4 11:35:20 nicA91A84 kernel: IP: [<f84f9c9e>] >> acm_probe+0x44e/0x127c [cdc_acm] >> Jun 4 11:35:20 nicA91A84 kernel: *pdpt = 00000000354eb001 *pde = >> 000000007f003067 >> Jun 4 11:35:20 nicA91A84 kernel: Oops: 0000 [#1] SMP >> Jun 4 11:35:20 nicA91A84 kernel: last sysfs file: >> /sys/devices/pci0000:00/0000:00:1d.0/usb5/5-2/product > Yeah, you really need to update your kernel. You'll definitely need at > least commit 99f347caa456 ("USB: CDC ACM: Fix NULL pointer > dereference"). > > No more reports until you've tried a recent kernel, ok? ;) > > Johan Device in question does not cause kernel crash when using the cdc-acm driver on a Fedora 19 system running Fedora kernel 3.9.5-301.
Thanks for all the help, I'll take care of my ancient kernels.
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