On Fri, 2015-10-16 at 09:54 +0200, Paul Menzel wrote: [...] > > BUG: unable to handle kernel NULL pointer dereference at 00000014 > > IP: [] sr_runtime_suspend+0xc/0x20 [sr_mod] > > *pdpt = 000000003696e001 *pde = 000000000000000000 > > Oops: 0000 [#1] SMB > > Modules linked in: sd_mod(+) sr_mod(+) cdrom ata_generic ohci_pci ahci libahci pata_amd firwire_ohci firewire_core crc_iti_t forcedeth libata scsi_mod ohci_hcd ehci_pci ehci_hcd usbcore usb_common fan thermal thermal_sys floppy(+) > > CPU: 1 PID: 73 Comm: systemd-udevd Not tainted 4.2.0-1-686-pae #1 Debian 4.2.3-1 > > Hardware name: Packard Bell imedia S3210/WMCP78M, BIOs P01-B2 11/06/2009 > > task: f68dd040 ti: f6988000 task.ti: f6988000 > > EIP: 0060:[] EFLAGS: 00010246 CPU: 1 > > EIP is at sr_runtime_suspend+0xc/0x20 [sr_mod] > > EAX: 00000000 EBX: f6a30cd8 ECX: f6c03d2c EDX: 00000000 > > ESI: 00000000 EDI: f828e100 EBP: f6989ba8 ESP: f6989b88 > > DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068 > > CR0: 8005003b CR2: 00000014 CR3: 3696d780 CR4: 000006f0 > > Stack: > > af83346c3 00000000 00000001 fffffff5 f6a7d150 f6a30cd8 f6a30d3c 00000000 > > f6989bbc c1390cb7 f6a30cd8 f8334660 00000000 f6989bd0 c1390d0f f6a30cd8 > > f8334660 00000000 f6989c0c c13916cb f694a614 f68dd040 00000000 00000008 > > Call Trace: > > […] ? scsi_runtime_suspend+0x63/0xa0 [scsi_mod] > > […] ? __rpm_callback+0x27/0x60 > > […] [...] > Ben Hutchings asked me to test the patch below to get more debug > information. [...] Well, that didn't help much. Paul hit another oops, this time in sd_mod but again apparently related to runtime PM. My patch only touched sr_mod. This time he sent photos of the complete oops; see <https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=801925;filename=20151020_005.jpg;att=4;msg=15> and <https://bugs.debian.org/cgi-bin/bugreport.cgi?filename=20151020_006.jpg;bug=801925;att=3;msg=15> Ben. -- Ben Hutchings The first rule of tautology club is the first rule of tautology club.
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