Red Hat Bugzilla – Bug 74965
uss720 and parport causes kernel Oops (kernel NULL pointer derefence)
Last modified: 2008-08-01 12:22:52 EDT
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020830 Description of problem: I have Belkin USB -> Parallerport adapter (based on USS720). On first boot RH (usb, kudzu, etc) detected the adapter and the attached printer ok (HP895C). Then something goes wrong with the normal paraller-port. Parport1 (normal LPT-port) gets also detected correctly, then kernel tries to "free nonexistent resources"... This Oops happens on every boot. Same problem with RH7.3. Here's the demsg: ... usb.c: registered new driver uss720 uss720: probe: vendor id 0x1293, device id 0x2 uss720: set inteface result 0 uss720: (C) 1999 by Thomas Sailer, <sailer@ife.ee.ethz.ch> uss720: reg: da 0c 23 00 00 00 01 uss720: epaddr 131 interval 1 ... parport0: Printer, HEWLETT-PACKARD DESKJET 895C uss720.c: v0.5:USB Parport Cable driver for Cables using the Lucent Technologies USS720 Chip usb.c: registered new driver usblp printer.c: v0.11: USB Printer Device Class driver ... parport1: PC-style at 0x378 (0x778) [PCSPP,TRISTATE] parport1: irq 7 detected Trying to free nonexistent resource <00000000-00000002> Trying to free nonexistent resource <00000000-00000002> Unable to handle kernel NULL pointer dereference at virtual address 0000000c printing eip: c01356b0 *pde = 00000000 Oops: 0000 parport_pc microcode printer uss720 parport mousedev keybdev hid input usb-uhc CPU: 0 EIP: 0010:[<c01356b0>] Not tainted EFLAGS: 00010012 EIP is at kmem_cache_free_one [kernel] 0x30 (2.4.18-14) eax: c1000030 ebx: 00000000 ecx: 00000000 edx: 00000000 esi: d887dc40 edi: 00000000 ebp: bfffebe8 esp: d6369f64 ds: 0018 es: 0018 ss: 0018 Process modprobe (pid: 336, stackpage=d6369000) Stack: c1fa2c60 00000292 d6c0f080 c0135058 00000000 d887dc40 c1fa2c60 d888732b d887dc40 d8885000 fffffff0 c011ce2a d8885000 d8885000 fffffff0 d631a000 c011c1a7 d8885000 00000000 00001000 d6368000 00000000 00000001 c010910f Call Trace: [<c0135058>] kfree [kernel] 0x38 (0xd6369f70)) [<d887dc40>] parport_uss720_ops [uss720] 0x0 (0xd6369f78)) [<d888732b>] cleanup_module [parport_pc] 0x3b (0xd6369f80)) [<d887dc40>] parport_uss720_ops [uss720] 0x0 (0xd6369f84)) [<c011ce2a>] free_module [kernel] 0xba (0xd6369f90)) [<c011c1a7>] sys_delete_module [kernel] 0xa7 (0xd6369fa4)) [<c010910f>] system_call [kernel] 0x33 (0xd6369fc0)) Code: 8b 41 0c 29 c6 89 f0 f7 73 18 89 c6 8b 41 14 89 44 b1 18 8b <3>ohci1394: pci_module_init failed Version-Release number of selected component (if applicable): How reproducible: Always Steps to Reproduce: 1.Attach USS720 based USB -> Paraller port adapter 2.boot 3. Additional info:
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