Hi, I'm getting the following kernel oops with a FTDI USB-serial-coverter (FT232BM) connected: [ 256.480843] BUG: unable to handle kernel NULL pointer dereference at (null) [ 256.481035] IP: [< (null)>] (null) [ 256.481035] *pdpt = 000000003642f001 *pde = 0000000000000000 [ 256.481035] Oops: 0010 [#1] PREEMPT SMP [ 256.481035] Modules linked in: ftdi_sio usbserial xt_limit rfcomm bnep af_packet ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw xt_NOTRACK ipt_REJECT iptable_raw iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables cpufreq_conservative cpufreq_userspace cpufreq_powersave acpi_cpufreq mperf fuse arc4 brcmsmac mac80211 btusb bluetooth uvcvideo brcmutil cfg80211 snd_hda_codec_realtek videobuf2_core videodev videobuf2_vmalloc snd_hda_intel snd_hda_codec snd_hwdep snd_pcm snd_timer videobuf2_memops snd crc8 samsung_laptop pcspkr cordic sg bcma soundcore sky2 iTCO_wdt coretemp joydev snd_page_alloc iTCO_vendor_support ac battery i2c_i801 rfkill microcode autofs4 i915 drm_kms_helper drm i2c_algo_bit thermal video button processor thermal_sys [ 256.481035] [ 256.481035] Pid: 3226, comm: laptop_mode Not tainted 3.4.0-rc5-1.9-desktop+ #1 SAMSUNG ELECTRONICS CO., LTD. NF110/NF210/NF310 /NF110/NF210/NF310 [ 256.481035] EIP: 0060:[<00000000>] EFLAGS: 00010202 CPU: 1 [ 256.481035] EIP is at 0x0 [ 256.481035] EAX: f3b8ae00 EBX: f3b8ae00 ECX: f7ddd394 EDX: 00000402 [ 256.481035] ESI: 00000000 EDI: f28ef000 EBP: f1291e20 ESP: f1291df8 [ 256.481035] DS: 007b ES: 007b FS: 00d8 GS: 0033 SS: 0068 [ 256.481035] CR0: 8005003b CR2: 00000000 CR3: 302c5000 CR4: 000007f0 [ 256.481035] DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 [ 256.481035] DR6: ffff0ff0 DR7: 00000400 [ 256.481035] Process laptop_mode (pid: 3226, ti=f1290000 task=f1075260 task.ti=f1290000) [ 256.481035] Stack: [ 256.481035] c058ea70 00000001 00000000 03000286 00000001 00000402 00000400 f28ef000 [ 256.481035] f28ef064 f28ef0be f1291e30 c058f5fe c058f5d0 f28ef064 f1291e44 c053b34a [ 256.481035] f28ef064 00000000 f28ef0be f1291e98 c053c19c 000080d0 f1291f00 f1075260 [ 256.481035] Call Trace: [ 256.481035] [<c058ea70>] ? usb_suspend_both+0x80/0x1b0 [ 256.481035] [<c058f5fe>] usb_runtime_suspend+0x2e/0x60 [ 256.481035] [<c058f5d0>] ? usb_probe_device+0x70/0x70 [ 256.481035] [<c053b34a>] __rpm_callback+0x2a/0x80 [ 256.481035] [<c053c19c>] rpm_suspend+0x26c/0x720 [ 256.481035] [<c034addb>] ? mntput_no_expire+0x2b/0x100 [ 256.481035] [<c053c700>] __pm_runtime_suspend+0x40/0x60 [ 256.481035] [<c058f66e>] usb_runtime_idle+0x1e/0x30 [ 256.481035] [<c058f650>] ? usb_runtime_resume+0x20/0x20 [ 256.481035] [<c053b34a>] __rpm_callback+0x2a/0x80 [ 256.481035] [<c053b7c9>] rpm_idle+0x1c9/0x260 [ 256.481035] [<c033eaec>] ? do_filp_open+0x2c/0x80 [ 256.481035] [<c053b8bc>] pm_runtime_allow+0x5c/0x60 [ 256.481035] [<c0537345>] control_store+0xa5/0xb0 [ 256.481035] [<c05372a0>] ? rtpm_suspended_time_show+0x60/0x60 [ 256.481035] [<c052f31e>] dev_attr_store+0x1e/0x30 [ 256.481035] [<c038b391>] sysfs_write_file+0xa1/0xf0 [ 256.481035] [<c033156a>] vfs_write+0x8a/0x160 [ 256.481035] [<c038b2f0>] ? sysfs_poll+0x90/0x90 [ 256.481035] [<c0331848>] sys_write+0x38/0x70 [ 256.481035] [<c071f38d>] syscall_call+0x7/0xb [ 256.481035] Code: Bad EIP value. [ 256.481035] EIP: [<00000000>] 0x0 SS:ESP 0068:f1291df8 [ 256.481035] CR2: 0000000000000000 [ 256.606706] ---[ end trace 811b63a9261a2fbd ]--- Regards, Frank Schäfer -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
