What makes this oops strange is that it occured when ripping a cd using a SCSI CD-RW, yet ide_* is on the call stack. The other process running was oggenc. florin APIC error on CPU0: 00(02) Unable to handle kernel paging request at virtual address 2d45a020 printing eip: daf7c385 *pde = 00000000 Oops: 0000 [#1] CPU: 0 EIP: 0060:[] Not tainted EFLAGS: 00210217 EIP is at 0xdaf7c385 eax: 00000086 ebx: c5a8b404 ecx: 00000000 edx: d8a2f800 esi: 40429000 edi: c2ba80a4 ebp: d8d7c000 esp: d8d7ded8 ds: 007b es: 007b ss: 0068 Process cdparanoia (pid: 2582, threadinfo=d8d7c000 task=d8a5d340) Stack: 00000001 c0143a5b daf7c380 d989c380 40429000 c2ba80a4 c5a8b404 00104025 c046478c daf7c380 daf7c3a0 d989c380 d8a5d340 c0118cb1 daf7c380 d989c380 40429000 00000001 00000001 40429000 c046478c c04646e0 00030002 c046478c Call Trace: [] handle_mm_fault+0x13b/0x170 [] do_page_fault+0x251/0x451 [] ide_dma_intr+0xa2/0xc0 [] ide_dma_intr+0x0/0xc0 [] handle_IRQ_event+0x3a/0x70 [] do_IRQ+0xbb/0x130 [] do_page_fault+0x0/0x451 [] error_code+0x2d/0x38 Code: 38 34 d9 80 72 34 d9 00 b0 4a 40 00 b0 a8 c5 01 00 00 00 01 <1>Unable to handle kernel NULL pointer dereference at virtual address 00000086 printing eip: d90f5043 *pde = 00000000 Oops: 0002 [#2] CPU: 0 EIP: 0060:[] Not tainted EFLAGS: 00210256 EIP is at 0xd90f5043 eax: 00000086 ebx: da5f8080 ecx: 00000017 edx: d934b900 esi: 081258a8 edi: d902e494 ebp: 00000001 esp: d8aabed8 ds: 007b es: 007b ss: 0068 Process abcde (pid: 1461, threadinfo=d8aaa000 task=d924cc40) Stack: 00000001 c0143a5b d90f5040 d934b900 081258a8 d902e494 da5f8080 18fae067 d8aabef8 d90f5040 d90f5060 d934b900 d924cc40 c0118cb1 d90f5040 d934b900 081258a8 00000001 00000001 081258a8 bfffed88 c012002e 00030002 d8a5d3e4 Call Trace: [] handle_mm_fault+0x13b/0x170 [] do_page_fault+0x251/0x451 [] wait_task_zombie+0x14e/0x1c0 [] sys_wait4+0x1b8/0x260 [] default_wake_function+0x0/0x30 [] sys_rt_sigprocmask+0xe8/0x160 [] default_wake_function+0x0/0x30 [] do_page_fault+0x0/0x451 [] error_code+0x2d/0x38 Code: d9 18 34 34 d9 c0 ea 32 d9 00 00 00 40 00 80 5f da 01 00 00 -- "NT is to UNIX what a doughnut is to a particle accelerator."