THis is rather deadly. Is it likely to be a 1394 bug, or scsi? Begin forwarded message: Date: Fri, 14 Oct 2005 21:50:14 +0200 From: "F. Poncin" <cr27587@xxxxxxxxx> To: linux-kernel@xxxxxxxxxxxxxxx Subject: slab error in cache_free_debugcheck(): cache `sgpool-8': Hello, I found this in several recent boot logs. Summary: slab error in cache_free_debugcheck(): cache `sgpool-8': double free, or memory outside object was overwritten Kernel version: 2.6.14-rc4-g9149ccfa Steps to reproduce: on boot Hardware: Dell 8300 + External USB disk enclosures I'm not subscribed to the list. Please Cc: Additional info / test on request. extract from dmesg: scsi2 : SCSI emulation for IEEE-1394 SBP-2 Devices ieee1394: sbp2: Logged into SBP-2 device ieee1394: Node 0-00:1023: Max speed [S400] - Max payload [2048] Vendor: Initio Model: ST3400832A Rev: 4.07 Type: Direct-Access ANSI SCSI revision: 00 SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) slab error in cache_free_debugcheck(): cache `sgpool-8': double free, or memory outside object was overwritten [<c014a43b>] cache_free_debugcheck+0x15e/0x215 [<c0144c73>] mempool_free+0x6c/0x73 [<c014ae71>] kmem_cache_free+0x25/0x59 [<c0144c73>] mempool_free+0x6c/0x73 [<f8891d92>] scsi_io_completion+0x1fd/0x4ac [scsi_mod] [<f8826d3f>] sd_rw_intr+0x155/0x30e [sd_mod] [<c0148e2b>] poison_obj+0x1c/0x38 [<c032ca6e>] _spin_lock+0x1c/0x75 [<f888cc33>] scsi_finish_command+0x82/0xb5 [scsi_mod] [<c032ca6e>] _spin_lock+0x1c/0x75 [<f888cb0a>] scsi_softirq+0xc0/0x141 [scsi_mod] [<c01252e1>] tasklet_action+0x59/0xbe [<c0124f79>] __do_softirq+0x69/0xd5 [<c0104ceb>] do_softirq+0x57/0x5b ======================= [<c01250c0>] irq_exit+0x42/0x44 [<c0104bbc>] do_IRQ+0x5c/0x8e [<c032b277>] schedule+0x627/0xcd8 [<c01036a6>] common_interrupt+0x1a/0x20 [<c0100e91>] mwait_idle+0x25/0x4a [<c023d243>] acpi_processor_idle+0x0/0x29e [<c023d344>] acpi_processor_idle+0x101/0x29e [<c023d243>] acpi_processor_idle+0x0/0x29e [<c0100ceb>] cpu_idle+0x45/0x7d [<c03f088a>] start_kernel+0x18c/0x1cb [<c03f030b>] unknown_bootoption+0x0/0x1b0 c233b7a8: redzone 1: 0x170fc2a5, redzone 2: 0xc0144b47. sdc: asking for cache data failed sdc: assuming drive cache: write through SCSI device sdc: 781422768 512-byte hdwr sectors (400088 MB) slab error in cache_free_debugcheck(): cache `sgpool-8': double free, or memory outside object was overwritten [<c014a43b>] cache_free_debugcheck+0x15e/0x215 [<c0144c73>] mempool_free+0x6c/0x73 [<c014ae71>] kmem_cache_free+0x25/0x59 [<c0144c73>] mempool_free+0x6c/0x73 [<f8891d92>] scsi_io_completion+0x1fd/0x4ac [scsi_mod] [<f8826d3f>] sd_rw_intr+0x155/0x30e [sd_mod] [<c0148e2b>] poison_obj+0x1c/0x38 [<c032ca6e>] _spin_lock+0x1c/0x75 [<f888cc33>] scsi_finish_command+0x82/0xb5 [scsi_mod] [<c032ca6e>] _spin_lock+0x1c/0x75 [<f888cb0a>] scsi_softirq+0xc0/0x141 [scsi_mod] [<c01252e1>] tasklet_action+0x59/0xbe [<c0124f79>] __do_softirq+0x69/0xd5 [<c0104ceb>] do_softirq+0x57/0x5b ======================= [<c01250c0>] irq_exit+0x42/0x44 [<c0104bbc>] do_IRQ+0x5c/0x8e [<c01036a6>] common_interrupt+0x1a/0x20 [<c0100e91>] mwait_idle+0x25/0x4a [<c023d243>] acpi_processor_idle+0x0/0x29e [<c023d344>] acpi_processor_idle+0x101/0x29e [<c023d243>] acpi_processor_idle+0x0/0x29e [<c0100ceb>] cpu_idle+0x45/0x7d [<c03f088a>] start_kernel+0x18c/0x1cb [<c03f030b>] unknown_bootoption+0x0/0x1b0 c233b7a8: redzone 1: 0x170fc2a5, redzone 2: 0xc0144b47. sdc: asking for cache data failed sdc: assuming drive cache: write through sdc:<6>FDC 0 is a post-1991 82077 -- Frédéric Poncin - : send the line "unsubscribe linux-kernel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
