Messages in this thread | | | Date | Tue, 21 Jan 2003 21:41:11 -0600 | From | Brian King <> | Subject | OOPS in idescsi_end_request |
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While burning a CD tonight I ended up taking an oops on my system. I had the lkcd patch applied to my 2.4.19 kernel, so I was able to look at the oops after my system rebooted. After digging into it a little and looking at the ide-scsi code I think I found the problem but am not sure. How can idescsi_reset simply return SCSI_RESET_SUCCESS to the scsi mid layer? I think what is happening is that a command times out, idescsi_abort is called, which returns SCSI_ABORT_SNOOZE. Later on idescsi_reset gets called, which returns SCSI_RESET_SUCCESS. At this point the scsi mid-layer owns the scsi_cmnd and returns the failure back up the chain. Later on, the command gets run through idescsi_end_request, which then tries to access the scsi_cmnd structure which is it no longer owns.
Any help is appreciated. I have a complete lkcd dump of the failure if anyone would like more information...
-Brian King
Here is the last bit in the log buffer:
<4>scsi : aborting command due to timeout : pid 2534304, scsi0, channel 0, id 1, lun 0 Write (10) 00 00 01 1e 91 00 00 1b 00 <4>hdk: timeout waiting for DMA <4>ide_dmaproc: chipset supported ide_dma_timeout func only: 14 <4>hdk: status timeout: status=0xd8 { Busy } <4>hdk: drive not ready for command <4>hdk: ATAPI reset complete <4>hdk: irq timeout: status=0x80 { Busy } <4>hdk: ATAPI reset complete <4>hdk: irq timeout: status=0x80 { Busy } <1>Unable to handle kernel NULL pointer dereference at virtual address 00000184 <4> printing eip: <4>e0fd22f1 <1>*pde = 00000000 <4>Oops: 0002 <4>CPU: 0 <4>EIP: 0010:[<e0fd22f1>] Tainted: PF <4>EFLAGS: 00010046 <4>eax: 00000000 ebx: 00000000 ecx: dfef8000 edx: c75bcbc0 <4>esi: 00000080 edi: c0491938 ebp: d5908000 esp: c0435ea4 <4>ds: 0018 es: 0018 ss: 0018 <4>Process swapper (pid: 0, stackpage=c0435000) <4>Stack: c0491938 00000000 00000000 c0491938 00000088 000001f4 c03349e2 c75bcbc0 <4> ce0a3b80 c0491938 00000080 00000080 c75bcbc0 c0222d6c 00000000 c1671580 <4> 00000080 c04918f4 c0491938 c0434000 c1671580 e0fd2550 c0223b30 c0491938 <4>Call Trace: [<c0222d6c>] [<e0fd2550>] [<c0223b30>] [<c0223990>] [<c0127af0>] <4> [<c01233d4>] [<c01232a6>] [<c01230ed>] [<c010a97f>] [<c010d173>] [<c0106f80>] <4> [<c0106fa3>] [<c0107012>] [<c0105000>] <4> <4>Code: c7 80 84 01 00 00 00 00 07 00 75 72 9c 5e fa bb 00 e0 ff ff
From lkcd:
================================================================ STACK TRACE FOR TASK: 0xc0434000 (swapper)
0 [ide-scsi]idescsi_end_request+129 [0xe0fd22f1] TRACE ERROR 0x800000000 ================================================================
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