http://bugzilla.kernel.org/show_bug.cgi?id=12195 Summary: "dd" make kernel panic Product: SCSI Drivers Version: 2.5 KernelVersion: 2.6.28-rc6 Platform: All OS/Version: Linux Tree: Mainline Status: NEW Severity: high Priority: P1 Component: Other AssignedTo: scsi_drivers-other@xxxxxxxxxxxxxxxxxxxx ReportedBy: alex.shi@xxxxxxxxx Latest working kernel version:2.6.27 Earliest failing kernel version:2.6.28-rc2 Distribution: RHEL 4u2 Hardware Environment: IA64 Software Environment: Problem Description: When we use dd tool to clear a SCSI disk. it may getinto a kernel panic like below: Unable to handle kernel NULL pointer dereference (address 0000000000000044) ksoftirqd/1[6]: Oops 8813272891392 [1] Modules linked in: Pid: 6, CPU 1, comm: ksoftirqd/1 psr : 00001010081a6010 ifs : 8000000000000289 ip : [<a000000100391cf0>] Not tainted (2.6.28-rc6) ip is at scsi_softirq_done+0x50/0x2e0 unat: 0000000000000000 pfs : 0000000000000184 rsc : 0000000000000003 rnat: 0000000000000000 bsps: 0000000000000000 pr : 0000000000005a81 ldrs: 0000000000000000 ccv : 0000000000000002 fpsr: 0009804c8a70433f csd : 0000000000000000 ssd : 0000000000000000 b0 : a00000010023f910 b6 : a000000100391ca0 b7 : a00000010000b220 f6 : 1003e0000000000001d4c f7 : 1003e0000000000200000 f8 : 1003e0000000080000000 f9 : 1003e0000054a28eb9332 f10 : 1003eb59a50a4dbb025f6 f11 : 1003e00000000000000c7 r1 : a000000100a1b720 r2 : e000000001105e48 r3 : e00000000cff9518 r8 : e00000000cff9510 r9 : ffffffffffff5e48 r10 : 0000000000000018 r11 : 0000000000000044 r12 : e000000008a97e10 r13 : e000000008a90000 r14 : e000000008a97e30 r15 : e000000008a97e38 r16 : 0000000000000020 r17 : 0000000000000030 r18 : e00000000cff9650 r19 : e00000000cff95e0 r20 : a00000010082eea8 r21 : a000000100391ca0 r22 : e000000001e9ab70 r23 : e000000001e9aac8 r24 : e00000000cff9540 r25 : e000000008a97e30 r26 : e000000008a97e30 r27 : e00000000cff9518 r28 : e000000008a97e38 r29 : 0000000000000000 r30 : 0000000000000000 r31 : 0000000000000000 Call Trace: [<a000000100012870>] show_stack+0x50/0xa0 sp=e000000008a979e0 bsp=e000000008a90eb0 [<a000000100013150>] show_regs+0x830/0x860 sp=e000000008a97bb0 bsp=e000000008a90e68 [<a000000100022a60>] die+0x1c0/0x2c0 sp=e000000008a97bb0 bsp=e000000008a90e20 [<a000000100042350>] ia64_do_page_fault+0x830/0x960 sp=e000000008a97bb0 bsp=e000000008a90db8 [<a00000010000ba20>] ia64_native_leave_kernel+0x0/0x270 sp=e000000008a97c40 bsp=e000000008a90db8 [<a000000100391cf0>] scsi_softirq_done+0x50/0x2e0 sp=e000000008a97e10 bsp=e000000008a90d70 [<a00000010023f910>] blk_done_softirq+0x170/0x1c0 sp=e000000008a97e20 bsp=e000000008a90d58 [<a00000010006a8b0>] __do_softirq+0x110/0x2e0 sp=e000000008a97e30 bsp=e000000008a90cc8 [<a00000010006aaf0>] do_softirq+0x70/0xc0 sp=e000000008a97e30 bsp=e000000008a90c68 [<a00000010006c2d0>] ksoftirqd+0xf0/0x240 sp=e000000008a97e30 bsp=e000000008a90c40 [<a00000010008df80>] kthread+0xa0/0x120 sp=e000000008a97e30 bsp=e000000008a90c10 [<a000000100014430>] kernel_thread_helper+0x30/0x60 sp=e000000008a97e30 bsp=e000000008a90be0 [<a00000010000a0c0>] start_kernel_thread+0x20/0x40 sp=e000000008a97e30 bsp=e000000008a90be0 Kernel panic - not syncing: Aiee, killing interrupt handler! Steps to reproduce: while true; do echo "3">/proc/sys/vm/drop_caches; dd if=/dev/sdb2 of=/dev/zero bs=1024k count=8900; done; -- Configure bugmail: http://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the assignee for the bug, or are watching the assignee. -- To unsubscribe from this list: 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
